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N5000 MULTI-LEVEL INVERTER

INSTRUCTION MANUAL

DOC. NO. HHI-N5K-GEN-015

1

SAFETY PRECAUTIONS

N5000 INSTRUCTION MANUAL

Please read the following instructions and directions given in this manual before selecting,

operating, repairing and checking.

Please be advised regarding mechanical safety information, direction and etc before use.

There are two different instructions explained in this manual regarding (danger) and (caution).

DANGER: If not avoided, either death or injuries will occur.

CAUTION: If not avoided, either death or injuries will occur as well as property damage.

Also, Please be advised to read all instructions given in the caution manual as well as danger

manual. It is important to read all the instructions completely.

In the following instruction manual, please note the word “CAUTION”.

* Common Matter

• Due to high voltage consumption, this product can cause electric shocks and fire to the

body and machine. An expert in Installation, driving, control, maintence must operate this

product.

• In order to stop or inspect the machine, you must first cut the high voltage completely.

• Insulation must be ensured between N5000 and the test equipment before applying electric

current for the purpose of test.

A. Installation of System and Wiring

• You must close all the doors whenever moving the inverter panel or installation.

• This machine is not protected from flooding. Please keep this machine away from water

while keeping and moving.

• Avoid from anything inflammable. It may cause fire to the machine.

• Avoid electric wires, welding spark, metal or dust from entering the machine. It may cause

fire.

• Do not operate the damaged inverter further. It may cause further damage.

• Do not connect AC supply to the output terminal.

• Use a power cable and control cable in a proper form.

• Only an expert should do grounding operation for the inverter system based on the

electrical drawing.

• Check the terminal polarities and the terminal numbers.

• Check the connection for loose screws. Loose screws may cause fire to the machine.

• Use proper power cable, VCB and electric contactor. If not, it may cause fire to the machine

DANGER

CAUTION

2

SAFETY PRECAUTIONS


• The equipment must be connected to the ground.

If not connected to the ground, it may cause shock and fire.

• You must first turn off the power in order to do any wiring.

• Installation must be done correctly before doing any wiring.

If done improperly, It may cause electric shock.

• An expert must do all wiring to the machine.

If wiring is done improperly, it may cause fire.

• After any installation, repair or test, you must check for water, dust or piece of wires that

might be in the machine before turning on the power.

B. Operation

• Do not touch the power switch with wet hands. It may cause electric shock.

• When switching on or off electric current, do not push wet hands to the terminal of an

inverter. It may cause electric shock.

• When applying an electric current, do not push anything inside of an inverter. It may cause

electric shock and fire.

• Check the motor if it is turning around to the correct direction. It may cause an accident

and damage to the machine.

• Check for improper sounds or vibration from the motor. It may cause an accident and

damage to the machine.

• In the inverter operator, there is a function to change a variable, invariable and memory that

may induce severe system failure. An expert may only operate this.

• Do not use operator function while the inverter is in use.

C. Repair, Inspection and changing parts

• When inspecting the equipment, turn off the power and wait ten minutes before inspection

to avoid electric shock.

• An expert should do all repairs or changing parts to the machine. (You must remove all

metal parts from your body, which includes watches and other jewelry before working on the

machine.) Only use insulatied tools.

D. Caution of Use

• To avoid electric shock or accidents, use only designated parts and tools for this machine.

CAUTION

DANGER

DANGER

DANGER

1

Table of Contents


TABLE OF CONTENTS

CHAPTER 1. GENERAL DESCRIPTIONS ........................................................................................................... 3

1.1 INSTRUCTION MANUAL ........................................................................................................................................................................ 3

1.2 WARRANTIES ON PRODUCT ................................................................................................................................................................ 3

CHAPTER 2 INSTALLATION AND WIRING ..................................................................................................... 4

2.1 PRECAUTION ......................................................................................................................................................................................... 4

2.2 WIRING ................................................................................................................................................................................................. 5

2.2.1 terminal description .............................................................................................................................................................. 5

2.2.2 Power terminal wiring .......................................................................................................................................................... 7

CHAPTER 3. SPECIFICATION AND OPERATION ........................................................................................... 8

3.1 SPECIFICATION ..................................................................................................................................................................................... 9

3.2 INVERTER FEATURES ..........................................................................................................................................................................11

3.2.1 Composition ...........................................................................................................................................................................11

3.3 OPERATION .........................................................................................................................................................................................13

3.3.1 Inverter circuit ......................................................................................................................................................................13

3.3.2 Power cell circuit ..................................................................................................................................................................17

3.3.3 Inverter Output ....................................................................................................................................................................18

3.3.4 Control Function ...................................................................................................................................................................19

3.3.5 Power Cell Bypass (optional) ..........................................................................................................................................22

3.3.6 PWM method .........................................................................................................................................................................25

3.3.7 Operational Modes ..............................................................................................................................................................33

CHAPTER 4. INVERTER OPERATION ............................................................................................................. 39

4.1 DIRECTION OF OPERATING INVERTER WITH CAUTION .................................................................................................................39

4.2 INVERTER OPERATIONAL MODE ........................................................................................................................................................39

4.2.1 Self-operation by operator ...............................................................................................................................................39

4.2.2 Remote control operation ................................................................................................................................................39

4.2.3 Input/output related operation ......................................................................................................................................39

4.3 N5000 INVERTER TOUCH OPERATOR PANEL COMPUTER (TOPC) ................................................................................................40

4.3.1 TOPC hardware ....................................................................................................................................................................40

4.3.2 TOPC screen organization ................................................................................................................................................42

4.3.3 Operation screen .................................................................................................................................................................43

4.3.4 Waveform screen ...............................................................................................................................................................47

4.3.5 Variables screen .................................................................................................................................................................51

4.3.6 Errors screen .........................................................................................................................................................................54

2

Table of Contents


4.4 VARIABLES FOR INVERTER OPERATION ...........................................................................................................................................40

4.4.1 A code variables .................................................................................................................................................................57

4.4.2 B code variables ...................................................................................................................................................................62

4.4.3 C code variables ...................................................................................................................................................................68

4.4.4 D code variables ...................................................................................................................................................................70

4.4.5 E code variables ...................................................................................................................................................................72

CHAPTER 5 REPAIR AND INSPECTION ......................................................................................................... 83

5.1 REPAIR AND INSPECTION ..................................................................................................................................................................83

5.1.1 Normal inspection ................................................................................................................................................................83

5.1.2 Regular inspection ...............................................................................................................................................................83

5.2 ABNORMALITY INSPECTION ..............................................................................................................................................................84

5.2.1 Warning while inverter running (Alarm) ....................................................................................................................84

5.2.2 Breakdown while inverter running (Fault).................................................................................................................85

5.2.3 Inverter breakdown sequence .......................................................................................................................................87

5.3 INVERTER RESTORATION FROM SYSTEM FAULT ..............................................................................................................................88

5.3.1 For correct inverter restoration ......................................................................................................................................88

5.3.2 Treatment of the inverter cell unit ...............................................................................................................................88

5.3.3 Activation of the inverter after restoration ...............................................................................................................88

3

Chapter 1. General Descriptions


Chapter 1. General Descriptions

1.1 Instruction manual

• The following instruction manual is that of N5000 Inverter made by Hyundai Heavy

Industries Co., LTD. Please read the following direction carefully and completely before

operating an inverter. Atrer reading this manual, keep it to hand for future reference.

• The N5000 inverter is consisted only main panel.

Please make the system with input and output VCB likes Fig1.

Input and output VCB can be controlled by X12 and X13 terminals. (6~7page)

< Fig1. N5000 Instruction Block Diagram >

1.2 Warranties on Product

• Warranties on this product are based on the time of contract on the supply. However within the

warranty period, the warranty will be void if the fault is due to;

(1) Incorrect use as directed in this manual or attempted repair by unauthorized personnel.

(2) In the case that the reason of fault is out of the inverter.

(3) Using the unit beyond the limits of the specification.

(4) Natural disaster (earthquake, thunderstorm etc.)

• The warranty is only for inverter, any damage caused to other equipment by malfunction of the

inverter is not covered by the warranty.

Any examination or repair after the warranty period (one-year standard) is not covered. And

within the warranty period, any repairs and examinations which result in information showing

the faults were caused by any of the items mentioned above, the repair and examination cost

are not covered. If you have any questions regarding the warranty, please contact either your

supplier or the local HYUNDAI Distributor. Please refer to the back cover for a list of the local

HYUNDAI Distributors.

4

Chapter 2. Installation and Wiring


Chapter 2 Installation and Wiring

2.1 Precaution

Please observe the environmental guidelines below.

No. Item Description

1 Ambient temperature

Temperature range shall be between 0 and +40.

The daily mean temperature shall be between 5 and 35

2 Relative humidity

Shall be under 50% at the maximum temperature of 40.

Even at low temperature, it shall not exceed 85%.

There shall be no condensation due to temperature changes.

3 Altitude Shall be below 1000m above sea level.

4 Atmospheric pressure Shall be within the range of 860 - 1060hPa.

5 Vibration

The vibration frequency at an installation site shall be below

10Hz or above 20Hz.

If it is below 10Hz, the acceleration of vibration shall be below

0.3G.

If the frequency is between 20Hz and 50Hz, the acceleration

shall be below 0.3G.

If the frequency is between is 50Hz and 100Hz, the full

amplitude shall be below 0.1mm.

6 Air quality of the room The air conditions in the room where the equipment is

installed should be kept in the normal air dust level, and

especially be free of iron and organic particles suchas silicon.

7 Corrosive factors Density or quantity

Corrosive

gas

Hydrogen sulfide (H2S) 0.001 PPM or less

Sulfur dioxide (SO2) 0.05 PPM or less

Chloride gas (Cl2) 0.1 PPM or less

Ammonia gas (NH3) 0.1 PPM or less

Nitrogen dioxide (NO2) 0.02 PPM or less

Nitrogen oxide (NOx) 0.02 PPM or less

Ozone (O3) 0.002 PPM or less

Hydrochloric acid mist (HCl1) 0.1 mg/m3 or less

5



Notice

• When cleaning the equipment room, please use a vacuum cleaner lest dust will be stirred up.

• Do not apply silicon wax to the floor in the equipment room. It will have a negative effect on the

electric contact.

• After an external cable (grounding wire, main circuit cable and control wire) is led into the panel

completely seal the cable lead-in hole with putty.

If the cable lead-in hole is left unfilled, fresh air will enter the equipment, preventing the above

installation environment from being secured, which may cause serious damage to the equipment.

2.2 Wiring

Power must be turned off when working on wiring to avoid electric shock.

Wiring work shall be carried out by expert electrician.

Implement wiring after checking that the power supply is off. It might incur electric shock

and fire.

Check the polarity and the numbers on the terminal and connect them correctly.

2.2.1 terminal description

(1) Power terminals

Terminal block Terminal name Description

X1 R, S, T Main power input

X2 U, V, W Inverter output

X01 R1, S1, T1 3 phases AC 440V control power input

X02 P01, N01 Control power input (DC110V)

(2) Control signal terminals

Terminal block Terminal name Description

X11 5∼6 / 7∼8 Analog input(4∼20mA)

X12 20∼27, 29∼36

28, 37 : Common Digital output (Dry contact)

X13

1~8

11∼12

13∼14

15∼16

Analog input and output (4∼20mA)

WARNING

6



* Terminal block diagram example

7



2.2.2 Power terminal wiring

(1) Warning on Wiring

- Make sure that the power supply is off before connecting the main cable to the inverter input.

-Check if MCCB (Molded Case Circuit Breaker) for control power is off, when connecting the

control power to the inverter.

① Main power input terminals (R, S, T)

• N5000 uses 3-phase power source. Do not use single-phase power source.

• Connect input power cable to the inverter through the bottom of the transformer panel.

• When turning on or off the inverter using VCB(Vacuum Circuit Breaker), please keep the

frequency of on/off operations in accordance with the VCB specification.

② Inverter output terminals (U, V, W)

• Lines from inverter output terminals should be out from the bottom of the transformer panel

of the inverter.

• Do not install condenser for power factor improvement or surge absorber to the output

terminals. They may cause damage to the inverter.

• Ask manufacturer for correct use when you use a filter to restrain Surge voltage.

③ Ground (G)

• Make sure that you securely ground the inverter and motor to prevent electric shock.

8

Chapter 3. Specification and Operation



* The following material can be changed as revising structural design without notice. Please

ask to HHI directly to confirm the exact dimension.

Voltage

(V)

N5000

Type

Capacity

(kVA)

Output

Current(A)

Dimension (mm)

Width Height Depth

3kV Class:

3300V,

3000V

155L 200 35 2000 2850 1200

245L 300 53 2000 2850 1200

325L 400 70 2400 2850 1200

410L 500 88 2400 2850 1200

490L 600 105 3300 2850 1200

620L 750 132 3300 2850 1200

835L 1000 175 3600 2850 1200

1040L 1250 219 3600 2850 1200

1270L 1500 263 3800 2850 1400

1500L 1750 307 3800 2850 1400

1710L 2000 350 3900 2850 1400

1940L 2250 394 3900 2850 1400

6kV Class:

6600V,

6000V

330H 400 35 3200 2850 1200

495H 600 53 3200 2850 1200

675H 800 70 3900 2850 1200

835H 1000 88 3900 2850 1200

1000H 1200 105 4900 2850 1200

1270H 1500 132 4900 2850 1200

1700H 2000 175 5100 2850 1200

2130H 2500 219 5100 2850 1200

2590H 3000 263 5200 2850 1400

3020H 3500 307 5700 2850 1400

3450H 4000 350 5900 2850 1400

3930H 4500 394 6000 2850 1400

9



3.1 Specification

Item Specification

Inverter Type Voltage type (Series connection with H-bridge circuit, multilevel

output)

Input Voltage 3 kV class: 1) 3300V ± 10%

6 kV class: 1) 6600V ± 10%

Input Transformer Dry type multiphase coil transformer with built-in panel

Input Frequency 50Hz/60Hz ± 5%

Input Rectification 3kV class: 18pulse diode rectification, 6k class: 30pulse diode

rectification

Input Current Harmonics THD < 5%

Input Power-Factor 0.95

Output voltage 3phase 0~3000V, 0~3300V,0~4190V, 0~6000V, 0~6600V

Output voltage level 3kV: 13 level (space voltage), 6kV: 21 level (space voltage)

Output Frequency 0 ~ 120Hz

Rated operation range 100% load: continuous operation, 120% overload: 1min

Main power element &

modulation method IGBT, PWM

Efficiency 97% (rated operation)

Cooling Compulsive air cooling

Standard IEC

Ambient temperature 0∼40

Humidity < 85% non-condensation

10



Item Specification

Signal

Input, output

Input Digital Input (DI): 16 CH.

Analogue Input (AI): 4 CH.

Output

Digital Output (DO): 8 CH.

Analogue Output (AO): 4 CH.

(4~20mA)

Protection

Output overpower, DC over-voltage, DC under-voltage, CAN

communication failure, transformer over-temperature,

power cell inverter over temperature, Power cell fuse

damage, CPU eroor(installed redundant control board)

Control

V/F Operation

Torque mode Linear torque, 1.7th / 2nd power reduced

torque

Acceleration/dec

eleration mode

Deceleration: Linear

Acceleration: Linear, U/ RU/ S shape

Torque boost, Frequency jump, preventing stall

Sensorless vector control

options Vector control using Encorder, Bypass the damaged power

cell, Dualized control, Dualized control power

Cubicle protection class IP 41 (Cooling fan : IP20)

11



3.2 Inverter features

N5000 is a Cascaded H-bridge type voltage inverter, which generates high 3-phase voltage by

cascading single-phase low-voltage inverters of insulated DC part. Multi-winding transformer is

used for numbers of independent insulated DC parts. And input harmonics content is reduced by

installing 30 pulse (3kV class: 18 pulse) diode rectification part with phase differences of windings.

The improved structure enabled N5000 to generate high quality output voltage without a filter

that reduces harmonics and to utilize previously established motors and cables.

3.2.1 Composition

N5000 is composed of transformer panel, inverter (power cell unit) panel and control panel as

shown in Figure 3-1.

Figure 3-1 composition of N5000 inverter panel

A dry type multi-winding transformer is equipped in transformer panel. The 2nd winding of Multi-

winding transformer is constituted of 3 phase-5 winding groups with 12 degree phase differences

so that each winding is connected to the input terminal of power cell unit inside inverter panel for

6kV class. And the 2nd winding of multi-winding transformer for 3 kV class is constituted of 3

phase-3 winding groups with 20 degree phase differences.

Cooling fans are installed on top of all transformer panels for both 3kV and 6kV classes. The air

groove is separated from inverter/control panel and used for self cooling.

12



Each phase of U, V, and W has its own serially connected 5 power cells so that the total number

of power cells is 15 for 6kV class. For 3kV class, each phase of U, V and W has serially connected 3

power cells so that the total number of power cells is 9.

Every cell has the same electrical and structural shape and acts as a single phase inverter by

using IGBT power semiconductor. Each cell has its own control unit. Power cell control unit and

main control unit are connected by optical cable. Air, which is inhaled from front panel filter, goes

through heat sink of power cell unit, air groove and then exhaled out of cooling fan on top of the

inverter.

Figure 3-2. inside of inverter panel.

Main control PCB, control power, signal insulator, relay, MCCB, power transformer and terminal

blocks for control power and signal line input/output are installed on both front and side part of

control panel.

13



Figure 3-3-A Front view Figure 3-3-B Side view

3.3 Operation

N5000 inverter is a Cascaded H-bridge type voltage inverter, which generates 3-phase voltage

using serially connected single inverters (power cell unit).

3.3.1 Inverter circuit

Figure 3-4 shows the 6kV-class inverter power circuit. 3 phase power supply is supplied to each

of the power cell units through input transformer. Inverter of a power cell unit generates variable

voltage and variable frequency of single phase. And then the 5 power cell units are serially

connected to compose the output phase power. Finally, voltage between lines is generated through

Y connection between phases. Electric circuit of this type is named as “cascaded H-bridge

multilevel.”

14



Figure 3-4-A. 6kV-class N5000 inverter electric circuit

15



Figure 3-4-B. 3kV-class N5000 inverter electric circuit

DC power supplies for the power cells of 15 H-bridge type should be separated to generate

6600V/6000V voltage output in 6kV-class N5000 series inverter. So the number of the 2nd

windings is made equal as the number of the power cells by utilizing multi-winding transformer. 6

windings (3 windings in 3kV-class) of each group have 12 degree phase differences (20 degree in

3kV-class) with each other by grouping the 2nd windings to 3 phases to minimize the harmonics

which are generated by using diode rectification circuit in each of the power cells. The transformer

of this type makes rectification part of 30-pulses for 6kV-class and 18-pulses for 3kV-class so that

the THD (Total Harmonic Distortion) ratio of the 1st side of transformer can be reduced below 5%

which is complied with the IEEE std. 519-1992 (Harmonic Voltage and Current Limits).

16



Figure 3-5 Power cell input current

Figure 3-6 Inverter input current (6kV-class)

17



3.3.2 Power cell circuit

All power cells within N5000 inverter are of the same structure and composed of the same

electric circuits. They are operated as a inverter of 3-phase 760V intput type. Each power cell

consists of parts of the power supply and the control. Power supply part is consisted of parts of

the diode recification and the single-phase inverterusing IGBT. Capacitors are installed for the

protection of instant electrical failure and as the smooting-voltage circuit in DC part. Compulsive

air cooilng method is used to cool down the power elements using aluminum heat sink.

The Control part of power cell consists of the devices for power control and the DSP control

board. The devices for power control are supplied from main DC supply and make DC supplies for

controlling. DSP control board implements voltage PWM (Pulse width modulation) which generates

a voltage value determined by main control part, protective functions for DC over-voltage,

disconnection of input fuse for power cell and heat-sink and CAN (Controller Area Network)

communication control between main control part and elements using optical cable.

Figure 3-7 Power cell electric circuit

Figure 3-8 Power cell structure

18



760V from transformer is raised up to 1029V in rectification part of power cell. And power cell is

modulated to generate 762V/693V for the inverter final 6600V/6000V output because 5 power cell

outputs are serially connected for each phase in 6kV-class inverter. (Each power cell output of

3kV-class has 635V/577V because 3 power cells are serially connected for 1 phase in 3kV-class.)

Power circuit connections for power cell unit use busplates and busbars to minimize parasitic

inductance effect. Inverter circuit of the power cell inverts DC voltage to single phase AC voltage

and implements PWM for output voltage using on/off controllable IGBT.

3.3.3 Inverter Output

Maximum size of output voltage of each power cell unit is 762V. In the 6kV-class N5000 inverter,

six 762V units are serially connected to achieve 3810V and the 3810V units generate 6600 line

voltage using Y-connection as shown in figure 3-9.

※ Inside value of ( ) is the voltage when considering maximum N5000 inverter output as 6000V.

Single- connectedSingle- phase

Inverter

Interline VoltageVab=6,600V

Phase VoltageVa=3,810V

IGBT Output Voltage

762V

U

VW

V5

V4

V3

V2

V1

U5

U4

U3

U2

U1

W5

W4

W3

W2

W1

762V

762V

762V

762V

Figure 3-9 Voltage outputs of multilevel H-bridge inverter power cell output

Figure 3-10 output voltage curve of a power cell

19



Also, 21 levels (13 levels for 3kV-class) quasi-sinewave outpt based on the line voltage can be

achieved when the serially connected 5 power cell unit outputs that are allocated to each phase

have phase differences. This output characteristic of N5000 makes it to operate pre-installed

motors without additional filter.

Figure 3-11 voltage output curve of 6kV-class N5000 inverter

3.3.4 Control Function

Control part of N5000 inverter is composed of main control part, which is in charge of system

operations, controls, failure detections and protections, and the power cell controller that is

installed in the power cell. Main control part is located at the left side of control panel and

composed of CPU board, digital/analog I/O boards and optical converter board. Operator using

touch-keypad is installed at the front panel and has SMPS (Switched-mode power supply) for DC5V,

± 15V, 24V output to operate main control part and operator etc.

20



Figure 3-12 Organization of N500 Inverter master control

*CPU board

CPU board controls the system by exchanging signals with the I/O board. Also, it calculates the

inverter output value for controlling loaded motor speed and transfers the value to each power cell

controller through CAN communication. Power cell controller implements control for PWM in

accordance with the received control values from main control part and generate gate pulses for

IGBT to make adequate voltage and phase values for an induction motor. Operational information

of each power cell inverter is delivered to the main control part through CAN communication, and

the main control part makes inverter system perform a corresponding work. Figure 3-13 shows the

inside composition of CPU board. Main process elements are highspeed digital signal processor and

core part that is composed of integrated logic gate elements, EEPROM, SRAM and NVRAM.

Communication part is composed of CAN communication controlling device, RS235, serial

communication control device of RS485 and local bus for system expansion.

*I/O board

I/O board is consisted of digital I/O and analog I/O board. And a circuit for 16 digital input and 8

insulated digital output (contact) channels is installed in DIO board. A 4 channel analog input

circuit, which converts 4~20mA input signal to voltage and convert the voltage to digital signal

using differential amp, and an analog output circuit, which generates output voltage from 0 to 10V

using DA converter, are installed in AIO board.

21



*Optical conversion board

Optical/Electrical signal conversion circuit that can reduce the noise effects between the main

control part and the power cell control part and optical cable connector are installed in optical

conversion board. Optical conversion circuit guarantees 5Mbps communication speed for CAN

communication.

Figure 3-13 Organization of CPU board circuit

* Power cell control board

Power cell control board performs PWM for IGBT and generates phase differences in accordance

with the control command from main control part. It also contains protective ground detection

circuit. Communication control circuit for CAN communication, optical conversion circuit, serial

communication control circuit for program download and PC connection port for individual power

cell test are installed in the board.

22



Cell Controller Function

* Cell Control

(PWM, Phase-shift)

* Master/Cell Communication

* Cell Protection

* Cell Monitoring

* Cell Diagnostic

CELL

CONTROLLER(TMS320LF2406A)

GATING

(Power Cell PWM)

SENSING

(DC Voltage, Fault)

CELL


CELL


OPERATOR

RS232

RS485

Master Controller Function

* System Control(Speed,Current)

* Master/Cell Communication

* System Protection

* System Monitoring

* System Diagnostic

OPTICAL LINK

Using CAN(1M bps)

Operator Function

* Operation Command

* Monitoring

* Maintenance

MASTER CONTROLLER(TMS320C31)

A1 B1

A2 A3 A4 A5 A6 B2 B3 B4 B5 B6 C2 C3 C4 C5 C6

C1

CAN CAN CAN

Speed & Current Control

Power Cell State

Va* Vb* Vc*

SENSING

(Input Voltage, Output

Voltage/Current, Speed)

Sync. Tx EnableSync. Tx EnableSync. Tx Enable

Figure 3-14.1 Organization of Inverter control part

Figure 3-14.2 power cell control board

3.3.5 Power Cell Bypass (optional)

It is common to halt all the inverter system when the power cell failure occurs. But in “Power Cell

Bypass” method, inverter eliminates only the layer in which power cell failure occurred and keeps

running for high inverter efficiency.

In N5000 series, additional bypassing switches are installed to run the inverter with lowered

voltage for important loads that should not be stopped. So that operator can fix the inverter

without stopping. Additional switches are composed of bidirectional SCRs because the 3-phase

current of the load is bidirectional.

Optic connector

Program download connector

23



Bypass Circuit

A1 POWER CELL

A2 POWER CELL

B1 POWER CELL

B2 POWER CELL

C1 POWER CELL

A

B

POWER CELL

R

T

S BYPASS

Cell ControllerMaster

ControllerSerial Communication Using Optical Cable

Figure 3-15. Power Cell Bypass electricity circuit consisting 2 Layer

< Vector diagram and simulation in Bypass operation>

Followings are describing the bypass operations in normal and power cell failure cases using

vector diagram and simulation.

Normal operation

In figure 3-16, the line voltage becomes 380V, 5-output voltage levels by serially connecting 2

power cells for each phase. At this time, voltages of 3 phases should be balanced. Fight side of

figure 3-16, output line voltages (Vab, Vbc, Vca) and the output current of RL load are shown.

B2110V

380 Volts Max (Line-To-Line)

A

BCVbc

VcaVab

1200

A1110V

A2110V

B1110V

C1110V

C2110V

1200

1200

Figure 3-16. Power Cell No-Fail

24



Cell Bypass Operation when Power Cell Fails

Figure 3-17 shows that the cell bypass function can generate 50% out of rated voltage, 190V, by

connecting power cells in layer 2 using SCR in the case of power cell failure of layer 2.

A

BCVbc

Vca Vab

1200

A1110V

B1110V

C1110V

1200

1200

Maximum Voltage = 190 (50.0%)

Figure 3-17. A2, B2, C2 Power Cell Fail

25



3.3.6 PWM method

1) Types of PWM of multilevel inverter

Step PWM, space vector PWM and carrier-based PWM types are the PWM types for multilevel

inverter. Phase Disposition (PD), Phase Opposition Disposition (POD), Alternative Phase Opposition

Disposition (APOD), and Phase-Shifted (PS) methods are used for Carrier-based PWM. Figure 3-18

~ Figure 3-22 shows various PWM methods for 5-level inverter. If phase-shifted carrier-based PWM

is applied to an H-bridge multilevel inverter, power circuit and control devices can be modularized

and be distributively controlled. They can also be implemented simply.

V_ref Vtri_1

Vtri_2

Vtri_3

Vtri_4

0 t

Figure 3-18. Space Vector PWM Figure 3-19. Phase Disposition (PD)

V_ref Vtri_1

Vtri_2

Vtri_3

Vtri_4

0 t

V_ref Vtri_1

Vtri_2

Vtri_3

Vtri_4

0 t

<- Figure 3-20. Phase Opposition Disposition (POD)

-> Figure 3-21. Alternative Phase Opposition Disposition (APOD)

26



V_refVtri_1 Vtri_2 Vtri_3 Vtri_4

0 t

Figure 3-22. Phase-Shifted (PS)

2) Operational principle of individual power cell

H-bridge circuit of power cell has 4 modes of voltage output as shown in figure 3-23.

Mode 1: switch GA1 is on , switch below GA2 is on output voltage is V.

Mode 2: switch below GA1 is on, switch below GA2 is on output voltage is 0.

Mode 3: switch GA1 is on, switch GA2 is on output voltage is 0.

Mode 4: switch below GA1 is on, switch GA2 is on output voltage is –V.

GA1 GA2

V V

0

GA1 GA2

V

(a) Mode 1 (b) Mode 2

0

GA1 GA2

V

-V

GA1 GA2

V

(c) Mode 3 (d) Mode 4

Figure 3-23. Equivalent circuits of individual power cells

27



3) Operational pricipal of serially connected two power cells

' ' ' '( 1 4 2 3) 1 ( 1 4 2 3 ) 2AV H H H H V H H H H V

Mode 1: V1 = V2 = V output voltage = 2V. If load current is in positive direction, capacitors C1

and C2 discharge electricity to provide current. If load current is in negative direction, load current

charges C1 and C2.

(a) Mode 1

Mode 2: Output voltage is = V. When load current is in positive direction, Va=V and Vn=0 charge

capacitor C1. When Va=0 and Vb=V, capacitor C2 discharges electricity. If load current is in

negative direction, switching conditions of H1= H4=1 and H1'=H4'=1 charge capacitors C1 and C2.

(b) Mode 2

H3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

iaH3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

ia

H3

H2

V1

C1

H3

H2

V1

C1

H1

H4

H1

H4

n

a

ia

28



Mode 3: Output voltage is 0. When load current is in positive direction, Va=V and Vn=-V make C1

discharge and C2 to be charged. If Va=-V and Vn=V, C1 is charged and C2 discharges. When load

current is in negative direction, Va=V and Vn=-V make C1 to be charged and C2 discharge. If Va=-

V and Vn=V, C1 discharges and C2 is charged.

(c) Mode 3

Mode 4: Output voltage is -V. When load current is in positive direction, IGBTs H2, H3, H2' and

H4' are turned on, and C1 charges. If H2, H4, H2', and H3' are turned on, C2 is charged. When

load current is in negative direction, H2, H3, H2', and H4' are turned on and C1 discharges. If H2,

H4, H2' and H3' are turned on, C2 discharges.

(c) Mode 4

H3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

iaH3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

ia

H3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

iaH3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

ia

29



Mode 5: Output voltage is -2V. H2, H3, H2', and H3' are turned on, output voltage becomes -2V.

When load current is in positive direction, load current charges C1 and C2. When load current is in

negative direction, load current makes C1 and C2 discharge.

(c) Mode 5

Figure 3-24. Equivalent Circuit of serially connected two Power Cells.

H3

H2

V1

C1

H3

H2

V2

C1

H1

H4

H1

H4

n

a

ia

30



4) Operational Principal of Phase-Shifted Carrier-based PWM

Operational characteristic of serially connected H-bridge type multi-level inverter with phase-

shifted carrie-based PWM signal is shown in figure 3-25. Individual single-phase inverter with

independent power source acts as Uni-Polar PWM and carrer is shifted. So the output voltage is

expressed as 5-level with the same output voltage.

A1_X

A1_Y

A1

A2_X

A2_Y

A2

A1

A1 + A2

VtriVan*

-Van*

A1_X A1_Y

A2_X A2_Y

Power Cell A1

Power Cell A2

A2

Figure 3-25. Operational Principal of Phase-Shifted Carrier-based PWM of H-bridge

multilevel inverter

31



5) Synchronization of Power Cell PWM and phase control block diagram

Figure3-26 is a Power Cell’s phase controlling block diagram using optical cable and serial

communication for 6kV-class N5000 inverter. Voltage commands Va*, Vb*, and Vc* are delievered

to power cell controller through main controller using CAN communication, and the Power Cell

controller initializes inner timer for PWM signal generation in accordance with the interrupt signal

from CAN communication. 1 layer of each phase has no phase-delay. 1/5 of a sampling period for

2 layer, 2/5 for 3 layer, 3/5 for 4 layer and 4/5 for 5 layer phase delays of PWM are occur.

Power Cell C5

Power Cell C4

Power Cell C3

Power Cell C2

Power Cell C1

Power Cell B5

Power Cell B4

Power Cell B3

Power Cell B2

Power Cell B1

Power Cell A5

Power Cell A4

Power Cell A3

Power Cell A2

Power Cell A1 Non Phase-shift

& PWM Generation

1/5 Ts Phase-shift & PWM Generation




Speed & Current Controller

Va*

Vb*

Vc*

Master Controller Cell ControllerSerial Communication* Speed & Current Sensing* Speed & Current Control* Voltage Command Generation* Sync. Tx Enable* Cell Communication* System Protection & Monitoring* TMS320C31 CPU

* DC Link Voltage Sensing* Phase-shift* PWM Generation* Bypass Switch Control* Master Communication* Cell Protection & Monitoring* TMS320LF2406A CPU (including CAN)

CAN

* CAN* 1M bps* Optical Cable

Power Cell* 3 φ Diode Retifier* 1φ PWM Inverter* 5 Layer* 15 EA

Non Phase-shift & PWM Generation





Non Phase-shift & PWM Generation





CAN

CAN

Figure 3-26. Synchronization of Power Cell PWM and phase control block diagram

6) Realizational method for the synchronization and phase transition of Power Cell

PWM.

32



Realizational method for the synchronization and phase transition of 5-layered H-bridge type

multilevel inverter is shown in figure 3-27. Power cell controller of each layer decides basic timing

for phase shift according to the received CAN interrupt signal and the first layer makes PWM signal

without phase shift. The controller controls the amout of shifting using inner timer from 2nd layer.

Generally gating time is shifted by kTs/n at kth layer out of n layers.

Figure3-28 shows individual output voltages and synthesized output voltage of the power cell in

each layer of 5-layered A-phase. Output voltages of each Power Cell has the same value, they are

insulated with each other. And they have phase differences and connected serially. These make

tynthesized output voltage a multilevel output.

Van

A4_X A4_Y

A5_X A5_Y

Power Cell A4

Power Cell A5

A1_X A1_Y

A2_X A2_Y

A3_X A3_Y

Power Cell A1

Power Cell A2

Power Cell A3

Vdc2

-Vdc2

0

Van*

Van*

-

Ts Ts

2*Ts/5 Shift Using Timer A3


CAN Receive Interrupt

No Shift Using Timer A1


A1_X

A1_Y

A2_X

A2_Y

A3_X

A3_Y

A4_X

A4_Y

A5_X

A5_Y


Figure 3-27. Synchronization of Power Cell PWM and phase transition

33



Figure 3-28. Multilevel output voltage

3.3.7 Operational Modes

There are three kinds of operational mode such as V/F mode, vector control mode, and speed

sensorless control mode. It is set in the group A of the inverter operator menu.

1) V/F mode

V/F mode is the most commonly used AC-motor controlling method. Inverter controls the ratio

between the inverter output voltage and the output frequency so that it can control the size of

magnetic flux of AC-motor. When load is increased, the current of the motor is automatically

increasing accordingly. V/F mode can be realized simply and efficiently without any sensors. So,

V/F mode is set as basic in N5000 series.

34



인

버

터

Voltage

charictoristic

*

cmdf *f

*V

Ramp generator

I M

Figure 3-29. V/F operational block diagram

2) Vector control mode

Vector control mode separately controls torque and magnetic flux. When magnetic flux of

electromotor rotates on the space vector, it detects instant location of stator or rotation of

magnetic flux vector and decide standard vector. And then, it detects stator current and reflects it

to magnetic standard flux vector. Through this way, it separates exciting current and torque

current. Exciting current is the current component that has the same directional component with

the standard flux vector. Torque current is the component that has 90° phase difference with the

magnetic flux. Detected exciting current and torque current are controlled by the command of

current controller. The commanded values for torque current and exciting current are decided by

the rated value of motor and operational condition. This mode is used for the purpose of high

efficient variable control. It is possible to set this mode up through operator.

Inverter

Speedsensor

*N

*

actN

CalcurationCurrent

controller

*

qsi

*

dsi

*si *

sV

I M

Speed

controller

Figure 3-30. Vector control block diagram

I

N

V E

R T

E R

35



3) Speed-sensorless vector control mode

Adaptive Observer is used for measuring the speed of motor.

.

1/sB

A

C

SpeedAdaptation

G

+

-

X+

+sdqr

sdqsi

sdqsV

rr

sdqs

sdqs ii ˆ

-s

dqssdqs ii ˆ

sdqsi

idqse

X : Estimation State Vector A : Estimation State MatrixB : Estimation Input Matrix C : Output Matrix G : Observer Gain Matrix 1/s : Integraleidqs : Current Estimation Error

Induction Motor

Figure 3-31. Speed estimator block diagram in speed sensorless vector control mode.

State equation of motor:

Estimated motor speed:

sssdt

diiGBVxAx ˆˆˆˆ

s

qs

s

qsiqs

s

ds

s

dsids

s

driqs

s

qridsi

s

driqs

s

qridspr

iieiie

dteeKeeK

ˆˆ

ˆˆˆˆˆ

36



4) V/F control block diagram

Delta

Freq

uenc

y

Calcu

lation

Freq

uenc

y_Co

mmen

d

Analo

g_In

put(4

~20m

A)

Freq

uenc

y_In

put

Analo

g Sca

lerCo

ntrol

Mod

e

Selet

e

Acce

lerate

_Tim

e

Dece

lerate

_Tim

e

Acce

lerate

_Mod

e

Dece

lerate

_Mod

e

Max

imum

_Freq

uenc

y

Mini

mum

_Freq

uenc

y

Base

_Freq

uenc

y

Calcu

lated

_Freq

uenc

y

Jump

ing_P

oint_

1

Jump

ing_P

oint_

2

Jump

ing_P

oint_

3

Point

_1_w

idth

Point

_2_w

idth

Point

_3_w

idth

CT_A

CT_B

CT_C

CT_S

caler

LIM

ITER

CT_L

imite

d_Va

lue

DC-L

INK

1 ~ 18

LIM

ITER

DC-L

INK_

Limi

ted_V

alue

Jump

ing F

reque

ncy

Calcu

latio

n

Jump

ing_P

oint_X

Point

_X_W

idth

* 2

Boos

t_Mod

e

Boos

t_Fre

quen

cy

Boos

t_Volt

age

Calcu

lated

_Freq

uenc

y

Boos

t_Fre

quen

cy

Boos

t_Volt

age

Boos

ting F

uncti

on

Calcu

lation

Va, V

b, V

cRe

fere

nce

Calcu

lation

[참고

] 1

.

의

셋팅

은 C

ONTR

OL 판

넬전

면부

에있

는오

퍼레

이터

에서

입력

/수정

가능

함.

37



5) Vector control block diagram

a-b-cto

ds-qs

Eqn. (2)

dscomp-qs

comp

toa-b-c

Eqn. (7)

de-qe

tods-qs

Eqn. (4)

Kp+Ki/s

Kp+Ki/s

Kp+Ki/s

Ias

Ics

Ibs

Vas*

Vbs*

Vcs*

ωr*

Iqse*

Idse*

Iqse

Idse

θ

Vqse*

Vdse*

θ

+-

SPEED

CONTROLLER

Q-AXIS CURRENT

CONTROLLER

D-AXIS CURRENT

CONTROLLER

I M

ωr

∫

Iqse*

Idse*

1

Tr

ωsl*

ωe

ωr

Encoder

+-

+-

+-

++

ds-qs

tode-qe

Eqn. (3)

A6

A5

A4

A3

A2

A1

B6

B5

B4

B3

B2

B1

C6

C5

C4

C3

C2

C1

Phase shift of output voltage

Eqns. (1)

Calculation of Phase shift angle

Eqns. (5)

Θ shifted phase

ds-qs

tods

comp-qscomp

Eqn. (6)

Vqss*

Vdss*

Vqss*comp

Vqss*comp

Idss

Iqss

Phase delay of inverter output voltage is expressed by formula (1).

_

1

2 2ABC delay

NTsV

N

(1)

When controlling indirect vector, (2), (3), and (4) represent the process to change inverter output current Ias,

Ibs, and Ics to Idse, Iqse of DQ coordinate system.

2

3

3

s as bs csds

s bs csqs

I I II

I II

(2)

*( )e r sldt dt

cos sin

sin cos

e s sds ds qs

s s sqs ds qs

I I I

I I I

(3)

* * *

* * *

cos sin

sin cos

s e eds ds qs

s e eqs ds qs

V V V

V V V

(4)

38



( 1)

2

sshifted phase e

N T

N

(5)

* * *_

* * *_

cos sin

sin cos

s s sds comp ds shifted phase qs shifted phase

s s sqs comp ds shifted phase qs shifted phase

V V V

V V V

(6)

* *_

* * *_ _

* * *_ _

1 3

2 2

1 3

2 2

s sas ds comp

s s sbs ds comp qs comp

s s scs ds comp qs comp

V V

V V V

V V V

(7)

6) Sensorless vector control block diagram

Stationary to

Rotationary

Transform

2Φ/3Φ

Transform

3Φ/2Φ

Transform

Kp+Ki/s Kp+Ki/s

Kp+Ki/s

Ias

Vas*

Vbs*

Vcs*

ωr*

Rotationary

to Stationary

Transform

output

voltage

estimator

3Φ/2Φ

Transform

observervelocity

estimator

tan-1(ψqrs/ψdrs)

parameter

estimator

I M

+-

+-+

-

Ibs

Ics

Iqss

Idss

Vqss*

Vdss*

Vqse*

Vdse*

Iqse*

Idse*

Idse

Iqse

ωr

VbsVas Vcs

Vqss Vdss

ψqrs

ψdrs

Iqss

Idss

Iqse

Idse

ωrθ

ωr

ωr

Iqss Idss

Rs1/τr ,

θ

A6

A5

A4

A3

A2

A1

B6

B5

B4

B3

B2

B1

C6

C5

C4

C3

C2

C1

39

Chapter 4. Inverter Operation



4.1 Direction of operating Inverter with caution

- Control power should be supplied prior to main power to operate inverter.

(1) Control power is supplied by putting MCCB1 within controller panel.

(2) Set operational mode and operating conditions using the operator of front inverter controller

panel before supplying main power. (Refer to 4.3)

Table. 4-1 MCCB explanation within control panel (can be changeable in accordance with design.)

Contactor number Description

MCCB1 Circuit breaker for input control power

MCCB2 Circuit breaker for input power for cooling fan

MCB1 Circuit breaker for input control powers.

MCB2 Circuit breaker for fluorescent and concent, etc. power.

MCB3 Circuit breaker for control board source power.

MCB4 Circuit breaker for SMPS.

ELB1 Earth leakage breaker for space heater line.

4.2 Inverter operational mode

N5000 inverter is a Cascaded H-bridge voltage type inverter that generates 3-phase voltage

output by connecting single-phase inverters (Cell unit) serially.

4.2.1 Self-operation by operator

Set self-operation mode in the front operator. RUN and STOP operations can be implemented

without superior command in this case. Self-operation mode is used for the test purpose. (Refer to

4.3)

4.2.2 Remote control operation

Set the operational mode to remote control mode in front control panel. External speed, RUN,

and STOP commands can activate inverter. Settings of the inverter cannot be changed through

installed operator in the remote control mode.

4.2.3 Input/output related operation

(1) Inverter MODE signal: If K1 VCB of input VCB board is closed, input VCB board sends inverter

MODE signal to the inverter board.

40



(2) Inverter READY signal: After receiving inverter MODE signal, inverter senses the conditions of

controlling power and trip state and sends inverter READY signal to DCS.

(3) External RESET when inverter TRIP: When self-TRIP is occured, operator can cancel the TRIP

by pushing RESET switch (RS1) in input VCB board after resolving the reasons of TRIP.

(4) External inverter RUN: When K2 VCB of output VCB board is closed, inverter runs by inverter

RUN.

(5) Inverter S operator signal by external signal: If DCS sends inverter stop signal, output VCB

board takes that signal and sends S operator signal to the inverter. Inverter is stopped by this

signal. After stopping, signal that opens K2 VCB of output VCB board is delievered.

4.3 N5000 Inverter Touch Operator Panel Computer (TOPC)

N5000 Inverter can be set driving mode, inverter parameter and monitored driving information,

waveform information, warning/trip by using Touch Operator Panel Computer (The rest is same as

TOPC) that is installed in front of N5000 control cubicle.

4.3.1 TOPC hardware

(1) Names of TOPC parts

Figure 4-1 shows TOPC outline.

Figure 4-1. TOPC outline

41



Table 4-2. Name and function

Num. Name Content

A Power input DC-JACK φ2.5 DC Jack for power input

B Power input TB Terminal block for control power

C Power switch Power ON/OFF

D COM3 COM3 port(RS232C / Female Type D-SUB 9PIN)

E COM2 COM2 port(RS232C / Female Type D-SUB 9PIN)

F COM1_RS232C COM1_RS232C port(RS232C/Female Type D-SUB 9PIN)

G COM1 mode switch DIP switch for COM1 mode setting

H COM1_RS485 COM1_RS485 port(RS485)

I Ethernet 10Base-T Ethernet port(RJ-45)

J USB_HOST USB host port (USB A Type Connector)

K USB_DEVICE USB device port(USB B Type Connector)

L SD card connector SD card slot

M Audio output Stereo audio output terminal(φ3.5)

N Boot mode switch DIP switch for Boot mode setting

(2) Interface between TOPC and master controller

Communication interface between TOPC and master controller is RS-485 serial communication.

Signal transferring standard, connector pin numbers, and signal names are shown in the table

below.

Num. Item Description

1 Communication

method

Half Duplex

2 Synchronization

method

Asynchronous

3 Electrical transmission

distance

About 500m

4 Connection type 1:N (N ≤ 31)

5 Control code ASCII code or HEXA code

6 transmission speed 9600,19200,38400,57600,76800,115200 bps

7 Data format

Data size 7, 8 bit

Parity method None, Odd, Even Parity

S TOPC Bit

setting

1, 2 bit

42



(3) Hardware setting

Table 4-3 COM1 mode switch setting

COM1 mode switch Pin Setting Description

1 OFF

COM1 port is applied

RS485.

2 OFF

3 OFF

4 OFF

Table 4-4 Boot mode switch setting

Boot mode switch Pin Setting Description

1 OFF Application

auto execution mode 2 ON

3 OFF

4 OFF Communication speed

115200 bps 5 OFF

6 OFF

4.3.2 TOPC screen organization

TOPC start-up display composition is consisted on operation, waveform, variables, Errors like

Figure 4-3. It is easy to move to screens owing to consisting TAB composition. Whenever you want

to move to a screen, you just touch the point what you want to go once.

(1) Operation : Screen that displays N5000 Inverter operating status.

(2) Waveform : Screen that displays graph for N5000 Inverter operating status.

(3) Variables : Screen that contains parameters related N5000 operating condition.

(4) Errors : Screen that contains alarms & faults contents of N5000

43



Figure 4-3 TOPC Composition

4.3.3 Operation screen

Operation screen is the basic display of N5000 Inverter operator contains Input voltage, Output

voltage, Output current, Powercell DC link voltage, condition of Breaker, command/output

frequency, Digital I/O condition, Command frequency & Accel/Decel time setting and Run/Stop of

N5000 Inverter. So you can see all of the operating status of N5000 Inverter at a glance.

Figure 4-4. Operation Screen 1

(1) Communication LED (Figure 4-4, 1))

It shows whether the communication status between TOPC and Master controllers is good or

not. If communication is good, this LED is blinking regularly. If not, the LED is turned off or

not blinking regularly.

44



(2) Fault indication (Figure 4-4, 2))

It is shown when a fault occurs. But if there is no fault or cleared in the errors screen, you

cannot see it. You can check the fault information on errors screen.

(3) Alarm indication (Figure 4-4, 3))

It is shown when a alarm occurs. But if there is no alarm, you cannot see it. You can check

the alarm information on errors screen.

(4) Run & Stop button (Figure 4-4, 4))

When you touch the Run & Stop button, N5000 executes the Run & Stop. When you touch the

Run button, if it does not meet conditions to operate the inverter uprightly, run command does

not work and pop-up window that is described the reason what it isn’t working should appear

(Figure 4-5). Run & Stop button is only shown on Operation screen & Waveform screen.

Figure 4-5. Notice window about not activatied condition to work

(5) Setting parameters related with N5000 operation (Figure 4-4, 5))

When you set or change parameters related with operation, you can see the 10KEY window by

touching a variable button or a variable lable (Figure 4-6).

The name, range, unit of selected variable for operation are shown in the 10KEY window.

You can input value what you want to set by using number or point buttons. If you touch

wrong button, you can erase value by touching CE button. To apply the value to system

parameters, you should touch the Enter button. If the value what you input is wrong (ex; over

range), it cannot apply and you can see pop-up window described the reason.

Figure 4-6. 10KEY window

45



(6) Digital I/O Channel Display (Figure 4-4, 6))

N5000 Inverter has 16 channels digital input and 8 channels digital output. On/Off status of

the Digital I/O channel is displayed on operation screen and waveform screen of TOPC. And if

you touch digital display text ( , , ), the popup window will appear as Figure 4-7.

And you can confirm the status of digital I/O port and definitions. Touch the popup window, it

will disappear.

Figure 4-7. Digital I/O Channel Display

- Orange: digital input is activating, Gray (light out): not activating.

(7) Company logo & N5000 site information (Figure 4-4, 7))

If you touch the company logo twice continuously, ‘Configuration’ window will appear (Figure

4-8).

Figure 4-8. Setting & Mini keyboard

There are a program version of N5000 operator and Master. You can change the main

language on Language Selection menu. After selecting language, touch the ‘OK’ button. And

then all of the language will be changed to what you select. By modifing Site information label,

the text on upper left of TOPC will be changed. When you touch the label (Figure 4-8, 1)),

46



‘Mini keyboard’ will appear and you can input what you want to write. Font Size and Fond

Aspect Ratio of TOPC also can be changeable. If you want to apply, touch ‘OK’ button. ‘Exit to

WinCE’ button is to back to TOPC OS default screen.

(8) Basic Screen Tab (Figure 4-4, 8))

Touch the text what you want to go to a specific screen, it will be displayed.

Figure 4-9. Operation Screen 2

(9) Command frequency & Output Frequency & Animation (Figure 4-9, ①)

Command frequency & Output frequency are displayed as Progress Bar to compare easily. It

displays animation that whether motor is rotating or not and rotating direction.

Table 4-5 Animation icon & description

Display Description

N5000 Stop.

No Rotating

N5000 Forward Rotating

Clockwise direction

N5000 Reverse Rotating

Counter-clockwise direction

47



(10) Status of Breaker (Figure 4-9, ②)

It displays On/Off status of I/O Breaker & By-pass Breaker of N5000 Inverter.

1) Om status : Breaker TEXT & LED color is orange.

2) Off status : Breaker TEXT & LED color is gray.

(11) Input voltage (Figure 4-9, ③)

It displays Input voltage of N5000 Inverter

1) RS: RS line voltage as rms

2) ST: ST line voltage as rms

3) TR: TR line voltage as rms

(12) Cell DC-link voltage (Figure 4-9, ④)

It displays Power Cell DC Voltage of N5000 Inverter

1) Ux (x=1~10) : Power Cell DC voltage of the layer on U phase

2) Vx (x=1~10) : Power Cell DC voltage of the layer on V phase

3) Wx (x=1~10) : Power Cell DC voltage of the layer on W phase

(13) Output currents (Figure 4-9, ⑤)

It displays Output current of N5000 Inverter

1) U: U phase current as rms

2) V: V phase current as rms

3) W: W phase current as rms

(14) Output voltage (Figure 4-9, ⑥)

It displays Output voltage of N5000 Inverter.

1) UV: UV line voltage as rms

2) VW: VW line voltage as rms

3) WU: WU line voltage as rms

4.3.4 Waveform Screen

Waveform Screen displays Input/Output voltage, output rms current, motor speed and output

power through Scope Windows by real-time as Trace-data type. And, it displays Instant-Data type

simultaneously.

48



Figure 4-10. Waveform screen

(1) Scope screen button (Figure 4-10. ①)

Scope window is set and displayed by scope window buttons. The functions of each button are

as follow Table 4-6.

Table 4-6 Scope window buttons

Display Description

PLAY button on scope window. When touching a play button,

displaying selected item as real-time trace-data type on scope

window.

STOP button on scope window. When touching a stop button, halting

all data on scope window.

Setting button on scope window. It is to set item, time, the number of

scope window. (Refer to (2) Scope setting).

(2) Scope setting (Figure 4-10. ①, ②)

When touching the scope setting button, it will display scope setting window to set scope

configuration. (Figure 4-11).

49



Figure 4-11. Scope Configuration window

1) The number of scope window (Figure 4-11, ①)

The number of scope windows can be selected with 1 or 2 on ‘Count of scope window’

menu.

Figure 4-12. Th number of scope windows

2) Maximum value of X axis (Figure 4-11, ②)

X axis (Time) can be set as 1~10minutes. Set value is displayed on right below of window.

50



3) Item x(x=0~5) selection (Figure 4-11, ③)

Item can be displayed by selecting item on Item x selection. Selectable item and display

type is described on table 3.

① Scope window ‘1’ (Upper scope window)

It displays items that are selected among “Item selection 0 ~ 2”.

(Item 3~5 is not displayed even if they are selected.)

② Scope window ‘2’ (Below scope window)

It displays items that are selected among “Item selection 3~5”.

Table 4-7 Selectable item type

Item Display type

N/A Not applicable

Output power N5000 inverter power is displayed with kW unit.

Speed Motor speed is displayed with RPM unit by encoder.

Without encoder, calculated motor speed is displayed.

Input voltage RS Input line voltage between R and S is displayed as RMS.

Input voltage ST Input line voltage between S and T is displayed as RMS.

Input voltage TR Input line voltage between T and R is displayed as RMS.

Output voltage UV Output line voltage between U and V is displayed as RMS.

Output voltage VW Output line voltage between V and W is displayed as RMS.

Output voltage WU Output line voltage between W and U is displayed as RMS.

Output current U Output current of U phase is displayed as RMS.

Output current V Output current of V phase is displayed as RMS.

Output current W Output current of W phase is displayed as RMS.

4) Maximum value of item x(x=0~5) (Figure 4-11, ④)

It is to set maximum value of selected item.

51



4.3.5 Variables Screen

Variables screen is to set variables that are changeable according to inverter system, driving

sequence, motor control type. Moreover driving set variables can be downloaded and uploaded

(save and load). The number, name, applied value, master and slave set value of each variable is

displayed as type of List box.

Figure 4-13. Variables screen

The procedure to set variable is as below;.

1) Touch the code button what you want to set or adjust. (Figure 4-13, ③).

2) Touch the down-arrow button to find variable. (Figure 4-13, ⑤).

3) Touch the variable. (Figure 4-13, ④).

4) Set or adjust variable by 10KEY Screen. (Refer to 4.3.3 (5) to operate 10KEY).

(1) Code description window (Figure 4-13, ①)

There are 196 variables for inverter operation. It is useful to find variables which are classified

by below criteria (A~F codes). Each code description is displayed on (Figure 4-13, ①) when

code button (Figure 4-13, ③) is touched.

1) A Code : N5000 inverter basic setting variables

2) B Code : N5000 inverter analog I/O setting variables

3) C Code : N5000 inverter digital I/O setting variables

4) D Code : N5000 inverter alarm, fault level setting variables

5) E Code : N5000 inverter V/F control setting variables

6) F Code : N5000 inverter SLV/Vector control setting variables

52



(2) Save file & load file (Figure 4-13, ②)

It is to save and load file data of N5000 inverter operating variables.

1) Save file

It is possible that file can be saved on memory in TOPC (Folder name ‘Flash Disk’) or

external memory such as USB-HOST on rear of TOPC and SD card through connector. (If

files are saved on other type memory except above type, files are deleted when TOPC is

restarted). The procedure of saving files is as follow table 4-8;

Table 4-8 Procedure of saving files

Procedure Description

↓

↓

① Touch file save button on variables

screen.

② Confirm saving folder path on ‘Save as’

③ Touch button ‘OK’ (2) on left fig.)

④ Progress Bar appears.

⑤ ‘Notice’ window appears and saving file

name also will be shown.

File name( 1)) is set automatically.

2) Load file

File cannot be loaded during inverter running. The procedure of loading saved variable is as

follow table 4-9.

53



Table 4-9 Procedure of loading files

Procedure Description

↓

↓

⑥ Touch file load button on variables

screen.

① Confirm loading file path on ‘Open’.

② Touch button ‘OK’

③ Progress Bar appears.

④ On mode - N5000 MCU redundancy,

SLAVE MCU is loaded automatically.

⑤ ‘Notice’ window appears and loading file

name also will be shown.

(3) Code select button (Figure 4-13, ③)

Touch the code button to set and adjust variables. And then the variables for selected code

will appear in the list box (Figure 4-13, ④). The selected code button will be deactivated and

cannot be touched. Total Code button covers all variables from A code to F code

(4) List Box (Figure 4-13, ④)

When a code button is touched, the variables of code will be displayed on List Box. Each

variable has identification number that is displayed on “Number” column and variable name

that is displayed on “Variable Name” column. ‘Applied Value’ column means present setting

value with unit [A, V, Hz, etc] on N5000 inverter operation information. ‘MAS’ means Master

board on N5000 Main control part, ‘SLV’ means Slave board – redundant board.

54



4.3.6 Errors Screen

Errors screen displays the contents of alarm and fault that is occured during N5000 running.

Alarm/fault’s reset is possible by Clear buttons. Time setting, fault information, running time and

initializing variable buttons are also displayed.

Figure 4-14. Errors screen

(1) Fault Content (Figure 4-14, ①)

Fault content displays N5000 operating informations at the time of fault and max. 64

informations can be saved. At first, the latest occured fault contents are displayed and can

move to previous faults by arrow button. When a fault occurred, confirm the reason of fault

and repair. And then touch the “Clear fault” to reset fault status. During fault status, it is

impossible to check the other number of fault.

1) Fault number : Number of latest fault is “1”. Fault numbering is inverse time order. To find

the other number, touch the arrow button.

2) Fault time : Fault occured time

3) Fault content: Describe a cause of N5000 fault

4) Cmd. Freq.: Display command frequency at the time of fault

5) Output Freq.: Display output frequency at the time of fault

6) Output voltage: Display output voltage at the time of fault

7) Output current : Display output current at the time of fault

8) Running time: Display running time from inverter running to fault

9) Inserting time: Main control part running time

55



(2) Alarm content (Figure 4-14, ③)

Alarm content displays the alarm information. In case of alarm, alarm can be overlap and

overlapped alarm should be displayed. After confirming alarm, touch the alarm clear button

(Figure 4-14, ④) to reset alarm.

(3) Set time (Figure 4-14, ⑤)

Current time displays present time on N5000 inverter main control part and can be adjust by

Set Time buttons.

Figure 4-15. Set time window

Set Time window displays year/month/date/time (Figure 4-15). These parameters can be

adjusted on this window.

(4) Initialize (Figure 4-14, ⑥)

By Reset button, all variables, fault/alarm contents, running time etc. can be initialized in

initialization window (Figure 4-16).

56



Fig. 4-16 Initialization

1) No Initialization: Do not initialize.

2) Faults Data : Initialize all fault contents.

3) Parameters : Initialize all parameters with default value. (Refer to Attachment 1.)

4) Operation Time : Initialize running time and inserting time

5) Total : Initialize all data - parameters, Fault data, operation time etc.

57



4.4 Variable for inverter operation

Variables for inverter operation are changeable up to installation site condition and applicable

load of inverter system, operating sequence, motor control type. If each variable is set incorrectly,

it cannot be well operated and N5000 inverter system may be damaged.

There are 196 variables for inverter operation. Refer to attachment 1 to know name, min / max /

base value of each variables. It is useful to find variable which is classified by below criteria (A~F

codes).

A Code : N5000 inverter basic setting variables.

B Code : N5000 inverter analog I/O setting variables.

C Code : N5000 inverter digital I/O setting variables.

D Code : N5000 inverter alarm, fault level setting variables.

E Code : N5000 inverter V/F control setting variables.

F Code : N5000 inverter SLV/Vector control setting variables.

4.4.1 A code variables

A Code is composed with 26 basic variables. Each variable’s meaning is as below;

0) Command frequency

User can set command frequency value in the range of 0 ~ maximum frequency as [Hz] unit.

1) Acceleration time

Set time duration from 0Hz to base frequency as [Sec] unit. [Reference 1].

2) Deceleration time

Set time duration from base frequency to 0Hz as [Sec]. [Reference 1].

58



[Reference 1]

Time

Output frequency

Base

frequency

Commend frequency

Accel time Decel time

Real accel time Real decel time

Relationship between acceleration, deceleration time and output frequency

Set values of acceleration and deceleration time are the time durations to reach base frequency from 0Hz and

0Hz from the base frequency. Therefore, real acceleration/deceleration time is smaller than the set value when

the command frequency is smaller than the base frequency.

[EXAMPLE]

• Base frequency: 60 Hz,

• Current output frequency: 0Hz,

• Command frequency: 40 Hz,

• Acceleration time: 30[Sec],

• Deceleration time: 30[Sec]

timeonacceleratifrequencybase

frequencyoutputcurrentfrequencycommandtimeonacceleratireal

Therefore, real acceleration time is 20[Sec].

3) Motor direction

Set rotational direction of motor. (Direction cannot be changed during running)

‘1’ – FWD : forward direction

‘2’ – REV : reverse direction

4) Test mode

Inverter can be operated even when CAN communication is abnormal.

59



0: [Displays ‘OFF’] Inverter cannot be operated when CAN communication is abnormal.

1: [Displays ‘ON’] Inverter can be operated even when CAN communication is abnormal

[Reference] In site installation, for checking sequence between N5000 and SWGR, although

CAN communication is abnormal, it can be operated normally.

5) Inverter capacity

Set inverter capacity in [MVA] unit.

6) Input voltage

Set inverter input line voltage in [KV] unit

7) Operator selection

Select which operator sends command frequency and run / stop command.

‘0’ : [Displays ‘TOPC’] takes commands from TOPC. (Called as LOCAL mode)

‘1’ : [Displays ‘TM’] takes commands from external controller. (Called as ROMOTE mode)

‘2’ : [Displays ‘COM’] takes commands through N5000 MMI(RS-485 etc.)

8) N/A

9) Base frequency

Set base frequency. Usually rated frequency of the motor is set for the base frequency.

[Reference2].

10) Maximum frequency

Set maximum frequency of inverter output voltage. [Reference2].

[Reference 2]

Base frequency: the frequency that generates maximum output voltage. Usually rated frequency of

the motor is set as base frequency.

Maximum frequency: maximum frequency that can operate motor. Constant voltage is generated

beyond base frequency as shown below.

Max output

vlotage

Base frequency Max frequency

Relationship between base frequency and maximum frequency

60



11) Controller selection

Set the operating method for motor.

0: [displays ‘V/F’] linear torque mode. [Reference 3]

1: [displays ‘T17’] reduced torque mode 1. [Reference 3]

2: [displays ‘T20’] reduced torque mode 2. [Reference 3]

3: [displays ‘SLV’] sensorless vector control mode.

4: [displays ‘VC’] vector control mode.

5: [displays ‘VF SC’] Slip frequency control mode.

[Reference 3]

Linear torque mode: output voltage is generated proportionally with the output frequency.

Max output

voltage


V/F linear torque mode

Reduced torque mode: This mode is used when there is no need of intensive torque at low speed.

1) Reduced torque mode 1: generates output voltage with the curve of 1.7th power out of frequency.

2) Reduced torque mode 2: generates output voltage with the curve of 2.0th power out of frequency.

Max output

voltage


V/F reduced torque mode

61



12) Output voltage gain

Set the rate of output voltage in % when the output voltage frequency is the maximum

frequency.

13) Controller Mode

Select N5000 main controller mode among single or dual.

If N5000 main controller consists of one controller, set it 1. (Displays ‘single’).

If N5000 main controller consists of two controller, set it 2. (Displays ‘dual’).

14) Cell Number

Set the number of cell for one phase. If input voltage is 3300V class, set it 3 in this item. If

input voltage is 6600V class, set it 6 in this item.

[Caution] Controller power should be ‘ON→OFF→ON’ to apply values from 13) and 14) to the

system.

15) No-load current

Set the no-load motor current in [A] unit.

16) Motor rated voltage

Set the rated motor input line voltage in [kV] unit.

17) Motor pole

Set the number of poles of motor.

18) Motor rated current

Set the rated motor current in [A] unit.

19) Motor rated capacity

Set the rated motor capacity in [MVA] unit.

20) Soft LOCK

It is to prevent from modifying data.

‘0’ input [Displays ‘OFF’]: Not use Soft lock.

‘ 1’ input [Displays ‘ON’]: Use soft lock. All variables except for command frequency,

acceleration time, deceleration time and soft lock cannot be changeable with TOPC.

21) Initial Mode

‘0’ input[Displays ‘No Initialization’]: No initialization.

‘1’ input [Displays ‘Faults Data’]: Initializes history of system faults and alarms.

‘2’ input [Displays ‘Parameters’]: Initializes variables for operation to default values.

‘3’ input [Displays ‘Operation Time’]: Initializes running and inserting time.

‘4’ input [Displays ‘Total’]: Initializes all.

22) N/A

23) Ex Comm. Set

It is to set communication protocol between N5000 and external device.

‘0’ input [Displays ‘N5000MMI’]: Communication with only N5000 MMI

62



‘1’input [Displays ‘ModBus’]: Communication with Modbus RTU protocol

‘2’input [Displays ‘Tr. LAB’] : N/A

24) Ex Comm. Baudrate

It is to set Baudrate for external communication.

‘0’ input[Displays ‘9600’]: Baudrate 9600bps.

‘1’ input [Displays ‘19200’]: Baudrate 19200bps.

‘2’ input [Displays ‘38400’]: Baudrate 38400bps.

25) Ex Comm. ID

It is to set ID for External communication setting.

26) Stop Method

Set method for inverter stoping.

‘0’ input [Displays ‘FreeRun Stop’]: Free-run stop.

‘1’ input [Displays ‘Deceleration Stop’]: Deceleration stop.

27) N/A

4.4.2 B code variables

B Code is composed with 42 basic variables. Each variable’s meaning is as below;

28) External Cmd Frequency

There are 4 external analog channels to set command frequency and get external signals. This

variable chooses one channel as a command frequency terminal when command frequency is

set by external analog input.

29) Start frequency

Set the start frequency of command frequency in [Hz] unit when the command frequency is

determined by the external analog input. [Reference 4]

30) End frequency

Set the end frequency of command frequency in [Hz] unit when the command frequency is

determined by the external analog input. [Reference 4].

31) Start rate

Set the start voltage of command frequency when the command frequency is determined by

the external analog input [Reference 4].

32) End rate

Set the end voltage of command frequency when the command frequency is determined by

the external analog input. [Reference 4].

33) Starting method selection

Select starting method when the command frequency is determined by the external analog

input.

63



0: [Displays ‘Code’] If command frequency is in the range of 0 ~ start rate, TOPC outputs

‘start frequency’ as command frequency.

1: [Displays ‘0Hz’] If command frequency is in the range of 0 ~ start rate, TOPC outputs ‘0Hz’

as command frequency.

[Reference 4]

When starting method selection ((6)) is ‘0’.

100%

10V or

20mA

0V or

4mA

Output frequency (Hz)

Commend

frequency(%)

Max freq.

End freq.

Start freq.

Start

ratio

End

ratio

When starting method selection ((6)) is ‘1’.

Output frequency (Hz)

100%

Commend

frequency(%)

Max freq.

End freq.

Start freq.

Start

ratio

End

ratio

10V or

20mA

0V or

4mA

64



34) N/A

35) N/A

36) N/A

37) Vrs scale

Set scale of resistor sensor for input line voltage of R-S

38) Vst scale

Set scale of resistor sensor for input line voltage of S-T

39) Vtr scale

Set scale of resistor sensor for input line voltage of T-R.

40) Iu scale

Set scale of output current for U phase

41) Iv scale

Set scale of output current for V phase

42) Iw scale

Set scale of output current for W phase

43) Vuv scale

Set scale of resistor sensor for output line voltage of R-S

44) Vvw scale

Set scale of resistor sensor for output line voltage of S-T

45) Vwu scale

Set scale of resistor sensor for output line voltage of T-R

46~49) AnalogOut Ch.x(x=1~4) Selection

Set the signal of each channel for analog output terminal (x).

‘0’ input[Displays ‘N/A’]: Not applicable this channel.

‘1’ input [Displays ‘command frequency’]: Set signal command frequency the channel

‘2’ input [Displays ‘output frequency’]: Set signal output frequency the channel.

‘3’ input [Displays ‘motor speed’]: Set signal motor speed the channel.

‘4’ input [Displays ‘output voltage’]: Set signal output voltage the channel.

‘5’ input [Displays ‘output current’]: Set signal output current the channel.

‘6’ input [Displays ‘output power’]: Set signal output power the channel.

50~53) AnalogOut Ch.x(x=1~4) Gain

Set the gain of each channel for analog output terminal (x).

65



[Reference 5]

→ The gain is ‘a’ of set channel(AOx, x=1~4)

Set signal Output value

4mA(0V) 20mA(10V)

Command

frequency[Hz]

0 Max frequency*

Output frequency[Hz] 0 Min frequency*

Motor speed[RPM] 0 Motor max speed**

Output current[A] 0 Motor rated

current*

Output voltage[kV] 0 Motor rated

voltage*

Output power[kW] 0 Inverter capacity*

* Set value of each variable

** Motor max speed = (120ⅹMax frequency) / Motor poles

[Reference 5 example]

① Output value when variables are set as below;

▷ AO1 channel select : ‘1’ ▷ AO1 Channel select: ‘1.2’

▷ Max frequency: 60[Hz]

→Output value

4mA(0V) 20mA(10V)

0 72[Hz](: 60ⅹ1.2)*

* 60(: Max frequency)ⅹ1.2(: AO1 gain)

② AOx channel selection and the gain calculation method of AOx for setting case as

below;

▷ Max frequency: 60[Hz]

▷ Analog output terminal 2 channels are set as output frequency and 20[mA],

100[Hz]

→ AO2 channel select : Set as ‘2’

→ AO2 gain: set as ‘1.67’(100/60(Max frequency)=1.67)

66



54,56,58,60) AnalogIn Ch.x(x=1~4) Gain

Set the gain of analog input terminal signal of the channel(x).

55,57,59,61) AnalogIn Ch.x(x=1~4) offset

Set the offset of analog input terminal signal of the channel(x).

62) PID function Selection

Set whether PID function use or not. [Referece 6].

‘0’ input[Displays ‘OFF’]: Not use PID function .

‘1’ input [Displays ‘ON’]: Use PID function.

63) PID P gain

In the case of appling PID function, set gain value of P-Term [Reference 6].

64) PID I gain

In the case of appling PID function, set gain value of I-Term [Reference 6].

65) PID D gain

In the case of appling PID function, set gain value of D-Term [Reference 6].

66) PID Reference signal

In the case of appling PID function, set analog input channel for reference signal.

[Reference 6].

‘0’ input[Displays ‘0CH’]: Not use PID reference signal.

‘1’ input [Displays ‘1CH’]: Set channel 1 as PID reference signal.




67) PID Feedback Signal

Feedback signal is received through analog input terminals. Select one analog channel for

feedback signal [Reference 6].

‘0’ input[Displays ‘0CH’]: Not use PID feedback signal.

‘1’ input [Displays ‘1CH’]: Use CH1 channel for PID Feedback signal.




68) External Cmd Frequency 2

If there are 2 external devices to send command frequency through analog input terminal,

select the signal channel for the second command frequency.

‘0’ input[Displays ‘0CH’]: Not use External command channel 2.

‘x(x=1~4)’ input [Displays ‘xCH’]: set channel x as external command channel 2.

67



[Reference 6]

PID function controls oil flow, wind flow, and pressure for motor.

Basic composition of PID control

TargetValue Kp +

K is+ Kd

sInverter Control M

Sensor

FeedBack

Basic composition of PID control

PID operation

1) P (Proportional) operation: controlling amount is proportional to the objective value.

Target

ControlSmall

Big

Small

Big

P Gain P Gain

2) I (Integral) operation: controlling amount increases linearly as the time increases.

Target

ControlSmall

Big

I Gain I Gain

Small

Big

3) D (Derivative) operation: increase of controlling amount is proportional to the changing

ratio of objective value.

Target

ControlSmall

Big

D Gain

Small

Big

D Gain

69) Transformer temperature channel

Set external input terminal for inverter input multi-phase transformer temperature sensor

signal.

‘0’ input[Displays ‘0CH’]: Not use transformer temperature channel.

‘x(x=1~4)’ input [Displays ‘xCH’]: set channel x as Transformer temperature channel.

70) N/A

68



4.4.3 C code variables

C Code is composed with 26 basic variables. Each variable meaning is same as below;

71~81) DigitalIn x(x=1~11)

It displays predefined digital input terminals CH1~11, the variables cannot be set and

changed. Each input terminal is “ON” when it is activating, “OFF” when it is not activating.

There is definition of input terminals as below;

① Input terminal 1: N5000 Inverter Run command

② Input terminal 2: Emergency stop signal

③ Input terminal 3: Trip reset signal

④ Input terminal 4: N5000 Inverter mode signal

⑤ Input terminal 5: External trip signal

⑥ Input terminal 6: Internal trip signal

⑦ Input terminal 7: AC power condition signal

⑧ Input terminal 8: DC power condition signal

⑨ Input terminal 9: Input VCB closed signal

⑩ Input terminal 10: Output VCB closed signal

⑪ Input terminal 11: Fan power condition signal

82~86) Input terminal x(x=12~16)

Set signals for each input terminals CH12~16. Each input terminal is “ON” when it is activating,

“OFF” when it is not activating.

‘0’ Input[Displays ‘N/A’]: N/A terminal

‘1’ Input [Displays ‘Transformer over-temperature trip’]: Set as transformer over-temperature

trip.

‘2’ Input [Displays ‘Transformer over-temperature alarm’]: Set as transformer over-

temperature alarm.

‘3’ Input [Displays ‘Door switch’]: Set as trip during panel door opening.

‘4’ Input [Displays ‘Flow switch’]: Set as flow switch.

‘5’ Input [Displays ‘K3 status’]: Set as bypass breaker status.

‘6’ Input [Displays ‘External fault 2’]: Set as External fault 2.

‘7’ Input [Displays ‘parallel drive’]: Set as Parallel driving inverter use/not-use.

‘8’ Input [Displays ‘CMD Frequency Selection’]: Select command frequency input channel.

‘9’ Input [Displays ‘Sync meter’]: Set as signal from synchro-meter.

‘10’ Input [Displays ‘Sync mode’]: Set as mode selection signal of synchro-changeover.

‘11’ Input [Displays ‘Sync run’]: Set as start signal of synchro-changeover.

69



87~94) DigitalOut x(x=1~8)

Set signals for each input terminals CH1~8. Each input terminal is “ON” when it is activating,

“OFF” when it is not activating.

‘1’ Input [Displays ‘N/A’]: Not applicable

‘2’ Input [Displays ‘Ready’]: Set as a ready signal.

‘3’ Input [Displays ‘Running’]: Set as an inverter running.

‘4’ Input [Displays ‘Fault’]: Set as an fault signal.

‘5’ Input [Displays ‘Alarm’]: Set as a alarm signal.

‘6’ Input [Displays ‘Emergency’]: Set as an emergency push button

‘7’ Input [Displays ‘Stop 1s’]: Set as a stop signal during 1 second.

‘8’ Input [Displays ‘Cell Bypass Operation’]: Set as a Cell bypass use/not-use.

‘9’ Input [Displays ‘TOPC/REMOTE’]: Select mode which TOPC or REMOTE.

‘10’ Input [Displays ‘K1 Off P(2sec.)’]: Set as an input VCB OFF command signal during

synchro-changeover.

‘11’ Input [Displays ‘K2 Off P(2sec.)’]: Set as an output VCB OFF command signal during

synchro-changeover.

‘12’ Input [Displays ‘K3 Off P(2sec.)’]: Set as a bypass VCB OFF command signal during

synchro-changeover.

‘13’ Input [Displays ‘K3 On P(2sec.)’]: Set as a bypass VCB ON command signal during

synchro-changeover.

‘14’ Input [Displays ‘Reach Freq. level’]: Select a reach frequency level use/not-use.

95) Encoder PPR

In the case of appling motor speed sensor, set a PPR (Pulse per Revolution) of speed sensor.

‘0’ means not-use speed sensor.

96) Reach Freq. level

When output frequency exceeds ‘reach frequency level’, DO terminal outputs ‘ON’ signal as

‘reach frequency signal’. [Reference7]

[Reference7]

Reach frequency level

Output frequency

Digital Output OFF ON OFF

70



97~104) N/A

4.4.4 D code variables

D Code is composed with 26 basic variables. Each variable meaning is as below;

105) Speed Loss Flt/Alm

Set as Fault or alarm during the loss of external command frequency signal.

‘0’ input[Displays ‘Fault’]: During the loss of command frequency, treated as fault .

‘1’ input[Displays ‘Alarm’]: During the loss of command frequency, treated as alarm.

106) Restart Mode

This function is to restart during motor free-run after inverter is stopped or input voltage-sag

is occured.

‘0’ input[Displays ‘OFF’]: Not use restart function.

‘1’ input[Displays ‘ON’]: Use restart function.

107) Interrupt Permit Time

Interrupt permit time is the waiting time for the recovery of input voltage after input voltage

sagging. On restart mode, if input voltage is recovered within interrupt permit time, N5000

inverter will restart. Set as unit [sec].

108) Electric Thermal Mode

Set use/not-use of electronic thermal mode.

‘0’ input[Displays ‘OFF’]: Not use electronic thermal mode.

‘1’ input[Displays ‘ON’]: Use electronic thermal mode.

109) Electric thermal Level

In the case of appling electronic thermal function, set trip base value. Normally it is based on

motor rated current (100%).

110) Electric Thermal Character

Set characteristics of electronic thermal whether constant torque control or reduced torque

control.

‘0’ input[Displays ‘CTC’]: Set as constant torque control.

‘1’ input[Displays ‘RTC’]: Set as reduced torque control.

111) Over Current Limit Level

Over current limit level (OC level) is to set inverter over current level. It is based on inverter

rated current and set by [%].

112) Voltage Limit Level

Voltage limit level is to set over voltage level. It is based on power cell DC link voltage. DC link

voltage is 850[V] at 100[%]. [Reference 8]

71



113) Current Limit Level

Current limit level is set as [%] based on motor rated current [100%]. [Reference 8].

114) Cell Bypass Function

Set use/not-use of cell bypass.

‘0’ input[Displays ‘OFF’]: Not use cell bypass.

‘1’ input[Displays ‘Balance’]: Use cell bypass with balance function.

‘2’ input[Displays ‘Unbalance’]: Use cell bypass with unbalance function.

115) Door Open Fault

Set for disable some protections of inverter fault.

‘0’ input[Displays ‘OFF’]: No disable fault protection.

‘1’ input[Displays ‘ON’]: Disable initial CAN communication alarm, Door open fault protection.

[Reference 8]

Relation voltage limit level and current limit level with output current as

below;

Relation voltage, current limit level with output current

Voltage limits level

Current limits level

DC-LINK Voltage

Output current

Output frequency

Commend frequency

72



116) Restart Output Volt. Acl/Dcl

On restart mode, it describes output voltage’s acceleration/deceleration gradient and set as

[%] of acceleration time in A code variable.

117) Restart Output freq. Acl/Dcl

On restart mode, it describes output frequency’s acceleration/deceleration gradient and set as

[%] of deceleration time in A code variable.

118) Restart Permission Back EMF(Back ElectroMotive Force)

When Back EMF is detected at beginning of restarting, restart mode will be waiting until Back

EMF is lower than permission Back EMF value [%] and inverter will restart.

119) Restart Test Mode

Before use the restart function, set for testing restart parameter.

120) Restart P gain

Set restart proportional gain value for accurate restart.

121) Restart I gain

Set restart integral gain value for accurate restart.

122) Re-Restart Permit Time

On restart mode, if restart function cannot be worked within Re-Restart permit time, inverter

is restarted on 0Hz automatically. Permit time is set by [%] of motor free-run duration.

123) Power Fail Mode

Set use/not-use of power fail mode.

On power fail mode, inverter is to stop during input voltage’s blackout and restart after input

voltage’s recovery.

124) Power Fail Permit Time

Power fail permit time is the waiting time for the recovery of input voltage after input voltage’s

blackout. On power fail mode, if input voltage is recovered within power fail permit time,

N5000 inverter will restart. Set as unit [sec].

4.4.5 E code variables

E Code for inverter V/F control is composed with 18 basic variables. Each variable’s meaning is as

below;

125) Boost Mode

Set use/not-use boost mode function. [Reference 9]

‘0’ input[Displays ‘OFF’]: Not use boost mode.

‘1’ input[Displays ‘ON’]: Use boost mode.

73



126) Boost Voltage

Boost voltage is set as [%] based on output voltage(100%). [Reference 9]

127) Boost frequency

Boost frequency is set as [%] based on base frequency(100%). [Reference 9]

[Reference 9]

Manual torque boost mode: Relationship among boost voltage, boost frequency,

and output voltage of manual boost mode is shown as below;

Output voltage

Base freq.

(100%)

Frequency

100%

Boost

voltage

Boost

Freq.

Boost mode

128) Freq. Upper Limit

Command frequency should not be set over frequency upper limit value [Hz].

129) Frequency Lower Limit

Command frequency should not be set under frequency lower limit value [Hz].

130,132,134) Jump Frequency x(x=1~3)

Set center of frequency x(x=1~3)[Hz] to skip the output frequency. [Reference 10].

131,133,135) Jump Frequency Width x(x=1~3)

Set half of frequency x(x=1~3) width [Hz] for jump. [Reference 10].

74



[Reference 10]

Equipments themselves have the specific resonance frequencies. If inverter

chooses resonance frequency of installed motor as the rotating frequency of

motor, the motor can severely be damaged. So N5000 prevents the resonating

phenomenon by jumping the resonance frequency of the motor.

-Frequency jump: Center frequency for jumping (=resonance frequency)

-Frequency jump width: 1/2 frequency width of jumping width.

Output

frequency

Frequency commend

Jump freq.1

Jump freq.2

Jump freq.3

Jump freq. width

Jump frequency

Relationship between frequency jump and output frequency

136) SC Proportional Gain

On slip frequency control mode, set proportional gain.

137) SC Integral Gain

On slip frequency control mode, set integral gain.

138) Acceleration pattern

Set output frequency and output voltage accelerating pattern corresponding to load.

[Reference 10].

‘0’ input[Displays ‘Linear’]: Set acceleration pattern as linear.

‘1’ input[Displays ‘S curve’]: Set acceleration pattern as S curve.

‘2’ input [Displays ‘U curve’]: Set acceleration pattern as U curve.

‘3’ input [Displays ‘RU curve’]: Set acceleration pattern as RU curve.

75



139) Deceleration Pattern

Set output frequency and output voltage decelerating pattern corresponding to load.

[Reference 11].

‘0’ input[Displays ‘Linear’]: Set deceleration pattern as linear.

‘1’ input[Displays ‘S curve’]: Set deceleration pattern as S curve.

‘2’ input [Displays ‘U curve’]: Set deceleration pattern as U curve.

‘3’ input [Displays ‘RU curve’]: Set deceleration pattern as RU curve.

[Reference 11]

Relation Acceleration and Deceleration pattern with output frequency is as below;

시간

출력 주파수

시간

시간 시간

지령 주파수

(a)

(c)

(b)

(d)

Accel / Decel pattern

(a) Accel/decal pattern is set as ‘Linear’

(b) Accel/decal pattern is set as ‘S curve’

(c) Accel/decal pattern is set as ‘U curve’

(d) Accel/decal pattern is set as ‘RU curve’

140) Output GND Level

When the sum of instantaneous 3 phase output current is over output ground level [%] of

motor rated current, inverter trip is activated. (Normal case is instantaneous 3 phase current is

‘zero’)

141) Input OV Level

When instantaneous inverter input voltage is over input over voltage level [%], inverter trip is

Output frequency command frequency

Time

Time Time

Time

76



activated.

142) Input UnVal Level

When 1 phase instantaneous input voltage is over input unbalance level [%] of inverter rated

voltage, inverter trip is activated.

4.4.6 F code variables

F Code for SLV or Vector control of inverter is composed with 39 basic variables. They are not

handle with this manual because these codes are set by only HHI engineer.

77



[Attachment 1] N5000 variables list -1

No. Code Variables Range

Default Unit Be able to change

on run Min Max

0

A

Command Frequency 0.0 120.0 0.0 Hz

1 Acceleration Time 1 3600 120 초

2 Deceleration Time 1 3600 120 초

3 Motor Direction 1 2 1 - ⅹ

4 Test Mode 0 1 0 - ⅹ

5 Inverter Capacity 0.001 32.000 1.00 MVA ⅹ

6 Input Voltage 0.001 32.000 6.6 kV ⅹ

7 Operator Selection 0 2 0 - ⅹ

8 N/A - - - - -

9 Base Frequency 30.0 120.0 60.0 Hz ⅹ

10 Maximum Frequency 30.0 120.0 60.0 Hz ⅹ

11 Controller Selection 0 5 0 - ⅹ

12 Output Voltage Gain 20.0 100.0 100.0 % ⅹ

13 Controller Mode 1 2 2 - ⅹ

14 Cell Number 1 5 5 - ⅹ

15 No Load Current 0.1 999.9 29.1 A ⅹ

16 Motor Rated Voltage 0.001 32.000 6.600 kV ⅹ

17 Motor Pole 0 99 6 - ⅹ

18 Motor Rated Current 0.1 999.9 87.4 A ⅹ

19 Motor Rated Capacity 0.001 32.000 1.00 MW ⅹ

20 Soft Lock 0 1 0 - -

21 Initial Mode 0 4 0 - ⅹ

22 N/A - - - - -

23 Ex Comm. Set 0 2 0 - ⅹ

24 Ex Comm. Baudrate 0 2 1 - ⅹ

25 Ex Comm. ID 1 100 1 - ⅹ

26 Stop Method 0 1 0 - ⅹ

27 - N/A - - - - -

28

B

External Cmd Frequency 0 4 1 CH. ⅹ

29 Start Frequency 0.0 30.0 0.0 Hz ⅹ

30 End Frequency 30.0 120.0 60.0 Hz ⅹ

31 Start Rate 0 100.0 2.0 % ⅹ

32 End Rate 0 100.0 98.0 % ⅹ

33 Starting Method Selection 0 1 1 - ⅹ

78






on run Min Max

34

B

N/A - - - - -

35 N/A - - - - -

36 N/A - - - - -

37 Vrs Scale 0.01 30.0 1.0 - ⅹ

38 Vst Scale 0.01 30.0 1.0 - ⅹ

39 Vtr Scale 0.01 30.0 1.0 - ⅹ

40 Iu Scale 0.1 3000.0 1.0 - ⅹ

41 Iv Scale 0.1 3000.0 1.0 - ⅹ

42 Iw Scale 0.1 3000.0 1.0 - ⅹ

43 Vuv Scale 0.1 5000.0 1.0 - ⅹ

44 Vvw Scale 0.1 5000.0 1.0 - ⅹ

45 Vwu Scale 0.1 5000.0 1.0 - ⅹ

46 AnalogOut Ch.1 Selection 0 6 0 - ⅹ




50 AnalogOut Ch.1 Gain 0.00 10.00 1.00 - ⅹ




54 AnalogIn Ch.1 Gain 0.00 10.00 1.00 - ⅹ

55 AnalogIn Ch.1 Offset 0 2000 384 - ⅹ







62 PID Function Selection 0 1 0 - ⅹ

63 PID P Gain 0.1 10.0 1.0 -

64 PID I Gain 0.0 3600.0 1.0 -

65 PID D Gain 0.0 100.0 0.0 -

66 PID Reference Signal 0 4 0 - ⅹ

67 PID Feedback Signal 0 4 0 - ⅹ

79






on run Min Max

68 B

External Cmd Frequency2 0 4 0 CH- ⅹ

69 Tr. Temp. Ch. 0 4 0 CH ⅹ

70 - N/A - - - - -

71

C

DigitalIn 1 - - 0 - ⅹ

72 DigitalIn 2 - - 1 - ⅹ









81 DigitalIn 11 - - 10 - ⅹ

82 DigitalIn 12 0 11 0 - ⅹ

83 DigitalIn 13 0 11 0 - ⅹ

84 DigitalIn 14 0 11 0 - ⅹ

85 DigitalIn 15 0 11 0 - ⅹ

86 DigitalIn 16 0 11 0 - ⅹ

87 DigitalOut 1 1 14 2 - ⅹ








95 Encoder PPR 0 65535 0 - ⅹ

96 Reach Freq. Level 0.1 100.0 100.0 % ⅹ

97 N/A - - - - -

98 N/A - - - - -

99 N/A - - - - -

100 N/A - - - - -

101 N/A - - - - -

80






on run Min Max

102

-

N/A - - - - -

103 N/A - - - - -

104 N/A - - - - -

105

D

Speed Loss Flt/Alm 0 1 0 - ⅹ

106 Restart Mode 0 1 0 - ⅹ

107 Interrupt Permit Time 1 18000 1 Sec ⅹ

108 Electric Thermal Mode 0 1 1 - ⅹ

109 Electric Thermal Level 20.0 120.0 100.0 %

110 Electric Thermal Character 0 1 0 - ⅹ

111 Over Current Limit Level 80.0 180.0 120.0 % ⅹ

112 Voltage Limit Level 80.0 150.0 123.0 % ⅹ

113 Current Limit Level 80.0 150.0 120.0 % ⅹ

114 Cell Bypass Function 0 2 0 - ⅹ

115 Door Open Fault 0 1 0 - ⅹ

116 Restart Output Volt. Acl/Dcl 0.01 200.00 10.00 % ⅹ

117 Restart Output Freq.

Acl/Dcl

0.01 200.00 50.00 % ⅹ

118 Restart Permission Back

EMF

0.1 100.0 5.0 % ⅹ

119 Restart Test Mode 0 1 0 - ⅹ

120 Restart P Gain 0.01 327.00 4.00 - ⅹ

121 Restart I Gain 0.1 3270.0 056.0 - ⅹ

122 Re-Restart Permit Time 20 100 50 % ⅹ

123 Power Fail Mode - - - - ⅹ

124 Power Fail Permit Time - - - - ⅹ

125

E

Boost Mode 0 1 0 - ⅹ

126 Boost Voltage 0.0 20.0 1.0 %

127 Boost Frequency 0.0 50.0 5.0 %

128 Freq. Upper Limit 0.0 120.0 60.0 Hz ⅹ

129 Freq. Lower Limit 0.0 120.0 0.0 Hz ⅹ

130 Jump Frequency 1 0.0 120.0 0.0 Hz ⅹ

131 Jump Frequency Width 1 0.0 10.0 0 Hz ⅹ





81






on run Min Max

136

E

SC Proportional Gain 0.00 327.00 0.00 - ⅹ

137 SC Integral Gain 0.00 327.00 0.00 - ⅹ

138 Acceleration Pattern 0 3 0 - ⅹ

139 Deceleration Pattern 0 3 0 - ⅹ

140 Output GND Level 30.0 120.0 80.0 % ⅹ

141 Input OV Level 120.0 180.0 130.0 % ⅹ

142 Input UnVal. Level 20.0 120.0 35.0 % ⅹ

143 N/A - - - - -

144 N/A - - - - -

145 N/A - - - - -

146 N/A - - - - -

147 N/A - - - - -

148 N/A - - - - -

149

F

Sensorless Gain 0.01 327.00 50 - ⅹ

150 Slip proportional Gain 0.01 327.00 0.01 - ⅹ

151 Slip Integral Gain 0.01 327.00 1.00 - ⅹ

152 Current Response Gain 0.01 99.99 1.00 - ⅹ

153 Current proportional Gain 0.00 327.00 0.00 - ⅹ

154 Current Integral Gain 0.00 327.00 0.00 - ⅹ

155 Flux Response Gain 0.001 9.999 1.000 - ⅹ

156 Flux Proportional Gain 0.01 99.99 1.00 - ⅹ

157 Flux Integral Gain 0.01 99.99 1.00 - ⅹ

158 Speed Response Gain 0.01 99.99 1.00 - ⅹ

159 Speed Proportional Gain 0.00 327.00 0.00 - ⅹ

160 Speed Integral Gain 0.00 327.00 0.00 - ⅹ

161 SLV_CC Response Gain 0.01 99.99 1.00 - ⅹ

162 SLV_CC Proportional Gain 0.01 99.99 1.00 - ⅹ

163 SLV_CC Integral Gain 0.01 99.99 1.00 - ⅹ

164 MRAS Proportional Gain 0.01 99.99 1.00 - ⅹ

165 MRAS Integral Gain 0.01 99.99 1.00 - ⅹ

166 ASO Proportional Gain 0.01 99.99 1.00 - ⅹ

167 ASO Integral Gain 0.01 99.99 1.00 - ⅹ

168 ASO Matrix Gain 0.01 1.99 1.00 - ⅹ

169 SLV_Wr Response Gain 0.01 99.99 1.00 - ⅹ

82






on run Min Max

170

F

-

SLV_Wr Propotional Gain 0.01 99.99 1.00 - ⅹ

171 SLV_Wr Integral Gain 0.01 99.99 1.00 - ⅹ

172 Stator Resistor 0.001 32.000 0.001 Ω ⅹ

173 Rotor Resistor 0.001 32.000 0.001 Ω ⅹ

174 Stator Inductance 0.001 32.000 0.001 H ⅹ

175 Rotor Inductance 0.001 32.000 0.001 H ⅹ

176 Mutual Inductance 0.001 32.000 0.001 H ⅹ

177 Motor Inertia 0.01 327.00 0.01 kg·m2 ⅹ

178 Estimated Stator Resistor 0.000 9.999 0.0 Ω ⅹ

179 Estimated Rotor Resistor 0.000 9.999 0.0 Ω ⅹ

180 Estimated Stator

Inductance 0.0 999.9 0.0 mH

ⅹ

181 Estimated Rotor Inductance 0.0 999.9 0.0 mH ⅹ

182 Estimated

MutualInductance 0.0 999.9 0.0 mH

ⅹ

183 Motor Rated Speed 0.1 3270.0 0.0 RPM ⅹ

184 Motor Over Load Rate 0.01 1.99 1.00 % ⅹ

185 Phase A Current Offset 0 65535 1 A ⅹ

186 Phase B Current Offset 0 65535 1 A ⅹ

187 Phase C Current Offset 0 65535 1 A ⅹ

188 Load Inertia 0.0 3270.0 0 kg·m2 ⅹ

189 N/A - - - - -

190 N/A - - - - -

191 N/A - - - - -

192 N/A - - - - -

193 N/A - - - - -

194 N/A - - - - -

195 N/A - - - - -

83

Chapter 5. Repair and Inspection


Chapter 5 Repair and Inspection

5.1 Repair and inspection

5.1.1 Normal inspection

Check the following list while operating

① Asynchronization of rotation of the motor with the displayed output frequency.

② Abnormalities in installed environment.

③ Abnormality of Cooling system.

④ Abnormal vibration and noise.

⑤ Over heat.

⑥ Abnormal Scent.

Check the inverter input voltage while operating

① Frequent occurrence of fluctuations of supply voltage.

② Unbalance of line voltage among 3 phases. (± 3%)

5.1.2 Regular inspection

Inverter stopping protocol for regular inspection:

Inverter stop (STOP)→main power Off→controller power Off→wait of 10min→inspection

Cleaning:

Use a soft towel with neutral detergent or ethlyalchol.

(note) Do not use acetone, benzene, toluene, and alcohol because they would take off the

paint.

Do not wipe display part of digital TOPC with detergent or alcohol.

Checking Parts

① Air filter

② Joint condition of the bolts.

③ Rusts and damages on the conductor and insulating material.

④ Discoloration and deformation of the parts

⑤ Leakage of electrolyte of the capacior

⑥ Discoloration and corrosion of the wire due to heat.

Check the board (PCB). Turn off the control power and then taking off the PCB after 5

minutes. Control power should also be off when the PCB is assembled.

① Discoloration and deformation of the resistances and capacitors.

② Discoloration and deformation of the board.

③ Foreign substances on the surfaces of the PCB Solders.

84



④ Use a soft brush to avoid part damage when taking off foreign substances from PSB

solders.

5.2 Abnormality inspection

Main controller

When the input circuit breaker (MCCB) is turned on for inverter initialization without supplying

main power, the main control part will be powered on and be initialized. If the control part is

normal, green LED on the CPU board of the main control part will flicker after 1sec. If it does

not flicker, consider the main control part is in abnormality.

* Check list

① Connection of the power connector for main control part.

② 5V power supply for the CPU board of main control part (Test Pin: P5-GND)

TOPC

When the input circuit breaker for main control part is turned on to operating inverter, TOPC

will be powered on. If the main control part operates correctly, it will start communicating with

the TOPC and the operation monitoring screen will come out. TOPC can be considered as a

normal state if communication lamp, which is located at the top-left of the screen, flickers.

* Check list

① Connection of the power connector and communication connector for TOPC.

② 24V power supply for the TOPC (TOPC input terminal: P24-GND24).

Abnormality while inverter running

If a breakdown occurs while the inverter is running, the inverter will be tripped. The

breakdown list will be recorded in the memories of the TOPC and the main control part.

Corresponding cell number will also be recorded incase of cell failure. When a cell is

determined as an abnormal cell, it should be exchanged with a normal cell.

5.2.1 Warning while inverter running (Alarm)

Alarm and its item name will be displayed on the screen of the TOPC when a warning is

occurred while inverter running. (Refer to 4.3.3)

1) Cell DC-LINK low voltage alarm

Cell DC-LINK voltage is below 720V (70% out of the rated value).

2) Transformer over temperature alarm

Ambient temperature around the core inside of the transformer panel is over 90.

85



5.2.2 Breakdown while inverter running (Fault)

When the breakdown (fault) is occurred, the inverter will stop by free-run. The breakdown trip

items are recorded in the memories of the TOPC and the CPU board of the main control part.

Operating data around the trip time is recorded and the recorded items can be shown by

connecting a external PC.

(Free-run: Inverter stops instantly. And the motor glides.)

1) Output over current

When the output current (input currnet for the motor) is over setting value, the inverter

will be tripped. The inverter can withstand 120% overload for 1 minute. And the operating

time from 100% to 120% is determined by the curve of electronic thermal graph.

Main cause and check list:

- Detecting CT for output current (including power supply for the CT),

- Damages on the inverter output cable and motor input cable. Check the set values for the

inverter output. (Refer to 4.3.9, 4.3.10)

2) Input over voltage

When the input voltage is over 130% out of rated input voltage, the inverter will be

tripped.


- Measure the inverter input voltage. (Use the voltmeter and the CTPT monitor of the TOPC

that are installed in input VCB panel).

- Check the abnormality of the board that detects input voltage.

3) Transformer over temperate

When the ambient temperature is over 120, the inverter will be tripped.


- Damage on the Cooling fan.

- Block of the air filter of the transformer door.

86



4) Door open monitor (user selection)

When a door of front or back side is opened while inverter running, the inverter will be

tripped.


- Door close failure.

- Switch (up, down) failure for door open.

5) CAN communication Trip

When any CAN communication among cell control parts of the inverter panel and the main

control part fails while running, the inverter will be tripped.


- Damage on the converting board for the optical communication in the main control part.

- check the connection (Main control part ↔ cell)

6) Loss of speed command Trip

When the inverter fails to get a speed command for specified time duration (initially 10

sec), the inverter will be tripped.


- Damage on the analog input.

7) Over voltage of the DC part of the cell

When any DC voltage of each cell in the inverter panel is over 1338V (130% out of the

rated voltage) while inverter running, the inverter will be tripped.


- Increase of the input voltage.

- Cell damage

8) Cell fault

When any cell of the inverter panel has damage while inverter running, the inverter will be

tripped.

When the damaged cells are detected, the numbers of the cells are shown in the TOPC.

87



① IGBT1 fault

Main cause and check list: Damage on the IGBT 1 module.

② IGBT3 fault

Main cause and check list: Damage on the IGBT 2 module.

③ Over voltage breakdown: Detected value = DC 1338V


- VFD regeneration

- Damage on the cell control part

④ low voltage breakdown: Detected value V


- Damage on a Capacitor

- Damage on the cell control part

⑤ Damage on the input F1(R-phase) fuse

Main cause and check list: check Fuse F1 using fuse indicator

⑥ Damage on the input F2(S-phase) fuse

Main cause and check list: check Fuse F2 using fuse indicator

Cell over-temperature


- Damage on the cooling fan

- Check air filter

5.2.3 Inverter breakdown sequence

Breakdown detecting sequence.

(1) Detect the output over current.

(2) Detect input over voltage

(3) Detect the transformer over temperature: over 120

(4) Detect the output ground fault current

(5) Detect the door open

(6) Detect the CAN communication error

(7) Detect the DC cell over voltage: over 1338Vdc

(8) Detect the loss of external speed command



5.3 Inverter restoration from system fault

5.3.1 For correct inverter restoration

Prepare the drawing and tools before restoring operation.

Do not damage the other parts while taking parts off from the inverter or putting parts back

into the inverter.

Check the markings and drawing to avoid wire connection fault.

Do not leave the tools inside the inverter while restoration.

5.3.2 Treatment of the inverter cell unit

When taking the cell unit out from the inverter system, follow the steps below.

① Turn off all the input power circuit breakers after turning off the input VCB for main power

and the output VCB.

② When taking out the cell unit, turn off the main power and wait for 10 minutes to discharge

electricity of the DC part in the cell unit.

③ Dismantle the front safety cover for cells from the front panel.

④ Dismantle the input connections of the cells that are about to be taken out from the front

panel.

⑤ Dismantle the output connections of the cells that are about to be taken out from the front

panel.

⑥ Take the optical cables out from the transmitting/receiving terminals for optical cables of the

front cell unit controller.

⑦ Disjoint the bolts for the cells of front panel.

⑧ Take the cell unit out from the inverter panel using front handle.

(Cell units are sliding type. Check the weight of the cell unit to take it out.)

When putting the cell units back into the inverter panel, do it in reverse order.

5.3.3 Activation of the inverter after restoration

Refer to 3.4 and the field manual.

n5000 multi-level inverter - cse uniserve€¦ · n5000 multi-level inverter instruction manual...

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