motor prtection relay

7/30/2019 Motor Prtection Relay

1/38

MMPPRR22000000((55 TThheerrmmaall SSeennssoorrss))MMoottoorr PPrrootteeccttiioonn RReellaayy

((IInncclluuddeess VVeerrssiioonn DD))

IInnssttrruuccttiioonn MMaannuuaall

Ver. 1.0 / 2001


2/38

Table of Contents

Page Subject

3 Introduction to MPR4 Wiring Diagram

5 Rear Panel Layout6- 7 Control Terminals, DIP Switch Selection and Location8 Front Panel - Layout9 - Settings

10-11 LCD Displays12-13 Menu Configuration

14 Parameter Settings - Communication Settings15-16 - System Parameter Settings16 - Voltage Settings17-18 - Current Settings

19 - Temperature Settings20-28 Tripping/Alarm Options

29 Trip and Alarm Default Setting & Activity Table, ANSI Codes

30 Actual Data - Measured and Calculated Data31 - Logical Inputs, Statistical Data and Fault Data32 - Statistical and Fault Data

33 Messages -Test Messages34 - Flash Messages, Constant Messages35 Communication36-38 Technical Specification38 Case and Cutout Details

Note

Installation, operation and maintenance should be in strict accordance with the instructions in this manual,national codes, and good practice. Installation or operation not performed in strict accordance with theseinstructions shall void the manufacturers warranty.

Warning

Unit must be grounded prior to connection of any power.

Disconnect all power inputs before wiring or servicing the equipment.

Warranty

SOLCON warrants the Product to be free from defects in workmanship and material. Product which provedefective within one year of operation, but no later than 18 months from date of shipment, shall be repairedor replaced free of charge, FOB factory. This is providing the customer promptly sends to Solcon a notice

of defect and satisfactory proof thereof; establishing that the product had been correctly applied, installed,maintained and operated in accordance with Solcon's written instructions, appropriate codes, regulations

and good practice, within the limits of rated capacity and normal usage; and assumes the obligation of allexpenses of returning the defective product to the factory.

The company reserves the right to make any improvements or modifications to its products without prior

notice.

1


3/38

Introduction

The MPR 2000 Motor Protection Relay is a newgeneration of microprocessor based relay designed tooperate with 3 phase induction motors.

True RMS voltages and currents are measured at asampling rate of 0.5 msec. This enables the MPR to be

used with variable speed drives and soft starters.

The MPR incorporates two main functions.a. Motor protection.b. Supervision and communication.

ProtectionAC motors are very rugged and reliable whenoperating within their limits. However, they are usuallydesigned to operate close to their rated limits withminimal margins for operating under abnormalconditions.A comprehensive protection device is required to

accurately create a Thermal Modelling for the motor torun safely up to its limits.This relay protects the motor from abnormal conditionsin the power supply, motor and cabling faults as wellas operator malfunctions.The MPR monitors three phase voltages, three phase +

earth fault currents and temperature inputs from 5sensors. All are combined to provide the mostcomprehensive protection package.The MPR can interpret as many as 31 different trips /alarms.Voltage based protection - Undervoltage,Overvoltage*, Phase loss, Phase sequence.

Current based protection - Too many starts, Maximumstart time, Under current *, Load increase, Low-setovercurrent (Stall / Locked protection) , High setovercurrent (Short circuit), Thermal Overload*,Unbalanced current *, Earth fault current*.Voltage/Current based protection - Under power.

Temperature based - Temperature protection for 5sensors*.General based protection - Serial port failure.* 2 levels - for Alarm and Trip.Protection levels and time delay settings areindividually configured through a key pad on the front

panel or through the communication port.

Unique Tripping / Alarm options, make it possible todesignate any fault as an Alarm, Trip, both or none.This unique facility also enables controlled fault Reset

possibilities. Authorized key enlarges the resetpossibilities.

A unique "Time To Trip" algorithm enables the

operator or host computer to take corrective actionsbefore tripping.

Optically isolated logic input is used as AuthorizedKey input and as input control through RS485 serial

link.The MPR incorporates four output relays. Two relaysare used for E/F and O/L (dedicated). Two additionalrelays can be designated as Trip or Alarm.

Supervision and CommunicationA Liquid Crystal Display (LCD), together with aKeypad and LEDs enables user friendly interface,accurate digital parameters setting, actual parametersreading, and detailed trip and alarm messages display.Unauthorized setting changes can easily be preventedby the correct use of the Authorized key input

terminals.Measured data - Phase and line voltages, Phasecurrents, Earth fault current, Power, Power factor and

RTD/Thermistor channel resistance/C.Calculated data - Motor load in % of FLC, ThermalCapacity, Time to trip, Time to start, Unbalancedcurrent.

Logic input status - Individual status of Authorized keycontact.

Statistical data - Motor running hours, Total number ofstarts, Total number of trips, Last start period, last startpeak current.Fault data - Last Trip, Last Alarm, Phase currents,

Earth fault current, Phase voltages, all at time of trip.RS485 serial link (with MODBUS communication

protocol), operating at baud rate of 1200 to 9600bits/sec enables monitoring of setpoints and actualparameters. Modifications of the setpoint parametersthrough the serial link makes it easy to modifysetpoints in place of the factory default parameters.RS485 enables 32 MPR units to be connected on the

same link to the host computer. When a need for morethan 32 units arises, using HMI & Data highwayequipment, a n unlimited number of MPR units can beconnected to the host computer.

2


4/38

Wiring Diagram

3


5/38

Rear Panel Layout

4


6/38

Control Terminals

Auxiliary Power Supply

AC power supply :115 / 230 VAC, 50/60 Hz (switchable).

Phase ........................................................ ................ 29Neutral ................................................... ................ 30

Ground ................................................... ................ 28

DC Power Supply (optional):19-60 or 85-300 VDC.

DC(+) ...................................................... ................ 29

DC (-) ................................................... ................... 30Ground..................................................... ................ 28

Analog InputsThe MPR can measure : three voltages, four currentsand three thermistors or up to five RTDs. True RMS

measurement is both for voltages and currents.Frequency should be in the range of 45-66Hz. Allcurrent and voltage inputs incorporate internal isolatingtransformers.

Line Voltages

Direct connection of line to line voltages up to 690

VAC. For higher voltages, up to 25 KV, use P/Ts.Phase L1 .................................................. ................ 33Phase L2 ........................................................... ...... 34Phase L3 .................................................. ................ 35

Neutral (When used)............................................... 36For single phase voltage measurement, connect phase

to 33, 34 & 35 and Neutral to 36.

Notes:1. Line voltages must be connected for frequency

sensing. When system voltage measurement isnot available and AC power supply is used,

connect auxiliary power supply, 29 to phase(33, 34, 35) and 30 to neutral input (36).

2. Power and Power factor can be calculated onlyif three voltage inputs and three current inputsare applied to the MPR in the correct sequence,eg : V1 to 33 with I1 to 37/38 or V2 to 34 with

I2 to 40/41 etc3. In V connection (medium and high voltage)

networks, connect the two phase output to 33and 34, where the center of the V output willbe connected to terminal 35 (see page 16 forcalculation of voltage and P/T values).

Line Currents

Currents measured through C/T secondary of 1 or 5 A.Phase L1 ... 1 A, 5 A, Common ............... 37, 38, 39Phase L2 ... 1 A, 5 A, Common ................ 40, 41, 42

Phase L3 ... 1 A, 5 A, Common ................ 43, 44, 45Note: Power and Power factor can be calculated only ifthree voltage inputs and three current inputs are appliedto the MPR in the correct sequence (see note 2 -

above).

Earth Fault Current

Currents measured through a differential C/T with asecondary of 5 A or 1 A.All phases ..1 A, 5 A, Common .................46, 47, 48

Note: It is recommended to use differential C/T. If a

differential C/T is not available, Earth Fault can be

measured using C/T Wiring Diagrams on Page 7.

Thermal SensorsThe MPR can accept inputs from :* Up to 5 RTDs (PT100)

* Up to 3 Thermistors + 2 RTDs (PT100)

Resistances(To configure the MPR see "DIP Switch Location" onpage 7 )* RTD 100 -240

* Thermistor 0.1K -30KRTD or Thermistor selection is done by removing rearpanel to set Dip Switches SW1.1 - SW1.8 on analogPCB. Set all 8 ON for Thermistors and OFF for RTDs.

LCD display in C for RTD use only. Selected byremoving rear panel to set dip switch on CPU PCB,

SW1.3 = ONRTDs three wire measurement system is used tocompensate for cable resistance. See temperature table

on page 25 (max. allowed cable resistance is 25 ).

Temperature sensors are connected as follows:Five RTDs:

RTD 1 ..........................................................17, 18, 19RTD 2 ..........................................................21, 22, 23RTD 3 ..........................................................25, 26, 27RTD 4 ..........................................................51, 52, 53RTD 5 ..........................................................55, 56, 57

Three Thermistors and Two RTDs:

Thermistor 1 .....................................................18, 19Thermistor 2 .....................................................22, 23Thermistor 3 ....................................................26, 27RTD 4 ..........................................................51, 52, 53

RTD 5 ..........................................................55, 56, 57

Note: If Thermistors/RTDs are not used, leave

terminals open, and disable all relevant Trip andAlarms.

Shielded cables must be used, connect shield toExternal ground terminal .....................................28

5


7/38

Control Terminals

Dip Switch Location

Remove Rear Panel. P.C.B's are located as follows:

Authorized Key ............................................... 60&61Open -DisabledClosed -To enable the following:* Change of parameters (through keyboard).

* Reset of any alarm/trip, regardless setting.* Reset of the thermal capacity.* Run self test.* Store default settings.* Reset and store of statistical data.

Output Relays

The MPR incorporates four output relays. Each has aC/O contact, rated 8A/250VAC, 2000VA.

O/L Relay. Operates unconditional when O/L isdetected

N.C. ......................................................... ............. 4&5N.O. ......................................................... ............. 4&6Note: In MPR 2000/5-D O/L relay is slave relay to

Alarm relay.

E/F Relay. Operates unconditional when E/F is

detectedN.C. ......................................................... ............. 7&8N.O. ......................................................... ............. 7&9Note: In MPR 2000/5-D E/F relay is slave relay to Trip

relay.

Auxiliary-1 Relay (Alarm)

Must be designated (by parameter setting) as Alarm

relay with Fail-Safe logic.N.C. ..................................................... ............. 10&11N.O. ..................................................... ............. 10&12

Note: When set as Alarm, relay is energized whenMPR is powered (closing 10-12 N.O contact)and de-energized upon alarm (closing 10-11N.C contacts).

Auxiliary-2 Relay (Trip)Must be designated (by parameter setting) as one of:* Trip relay.* Trip relay with Fail-Safe logic.

N.C. ...................................................................13&14 N.O. ..................................................................13&15

Serial Link

Standard RS485 Half Duplex, with MODBUSprotocol.

Twisted shielded pair should be used for wiring.Acceptable baud rates: 1200, 2400, 4800 and 9600BPS.Serial Port (+) ............................................................3

Serial Port (-) .............................................................2 Serial Port (shield) .................................................28

Notes:1. Auxiliary Power Supply must be turned Off

after changing baud rate value.2. To match the line, connect 120 resistors

between (+) and (-) at the end and beginning of

the line.

C/T Wiring Diagrams

Three C/Ts + Onedifferential.(Recommended

wiring).

Three C/Ts in aresidual Earth

Fault Connection

Note: When using this wiring diagram it is

recommended to increase the offset levels ofAlarm and Trip to avoid nuisance tripping.

6


8/38

Front Panel Layout

LEDs and Display Overview

On

Illuminates when auxiliary power supply voltage is

connected.

Stopped

Illuminates in stop position. Indicates that both

contactors A and B are open.

Starting

Illuminates as a response to start command. Indicatesthat command is still "ON" and motor's average currentis above 115% of rated current.

Running

Illuminates after completion of starting process.

Indicates that motor's average current decreased below115% of rated current.

O/L Trip

Illuminates when O/L is detected (O/L relay is closed).

E/F Trip

Illuminates when E/F is detected (E/F relay is closed).

AlarmIlluminates in Alarm condition. Stays lit even if alarmcondition disappears, turns off after resetting.

TripIlluminates in Trip condition. Stays lit even if tripcondition disappears, turns off after resetting.

Internal FailureIlluminates upon internal fault detection. Stays lit evenif internal fault disappears turns off after resetting.

LCD Display

Two lines of 16 characters each,presenting all data and messages.

Keys Overview

Press to change setpoint pages in

positive cyclical order.

Press to change the data page inpositive cyclic order.

Press to forward parameters withinpage. If key is pressed for more than

0.5 sec, parameters will be displayed ata fast rate.

Press to reverse parameters within

page. If key is pressed for more than

0.5 sec, previous parameters will bedisplayed at a fast rate.

Press once to increase parameter value.Press and hold to increase parameter

value at a fast rate (*).

Press once to decrease parameter value.Press and hold to decrease parametervalue at a fast rate (*).

Press to cancel displayed Alarm or Trip

(*).

Enables MPR self test and storingdefault parameters (*).

Press to store displayed parametervalue in the non-volatile memory (*).

SET

PAGE

DATA

PAGE

SELECT

FWD.

SELECT

REV.

RESET

TEST

STORE

(*) Note: If Authorized Key is locked out (open), only

viewing is possible. When the Key is closed,it is possible to view, change and store anyset parameter.

7


9/38

Front Panel Settings

Upon initiation of the MPR, the following occurs:

On and Stopped LEDs will turn on.

The LCD will display:

COMMUNICATION

***SETTINGS***

In order to review above page settings, press SelectFWD. key.

Messages are displayed on the LCD in two lines.

* Upper line describes the parameter's name.* Lower line shows its value.

When Authorized key terminals are open, it ispossible to view parameters but not to change or storethem.

An attempt to change a value byo,p orstorekeys, will result in "Unauthorized Access" message.

To change settings, when Authorized key is closed,

presso orp keys and save the new value bypressing Store key. Once data was properly stored inthe non-volatile memory the LCD displays the 2 sec.flash message:

DATA SAVED OK

Notes:

1. A new parameter setting becomes effective onlyafter storing it in the non-volatile memory. Settinga parameter without storing, and moving to anotherparameter, will return the parameter to its

previously stored value.

2. Any setpoint parameters can be viewed, altered andstored at any time. However, it is not recommendedto change and store important parameters while the

motor is starting or running.

3. Any stored parameter is kept indefinitely in thenon-volatile memory.

Returning to Factory Default Values:

Press Test key once, the LCD will display:

TEST/MAINTENANCE

***OPTIONS***

Press Select FWD. key three times, the LCD willdisplay:

STORE ENABLE

DEFAULT SETTINGS

Press Store and Set Page keys simultaneously, theLCD will display:

DATA SAVED OK

Note: Storing Default parameters erases all previouslyupdated parameters

8


10/38

LCD Display

9

Five types of information displays are available.

1. Parameter Settings

By pressing Set Page key the LCD displays thefollowing headers:

COMMUNICATION

***SETTINGS***

SYSTEM PARAMETER

***SETTINGS***

VOLTAGE

***SETTINGS***

CURRENT

***SETTINGS***

TEMPERATURE***SETTINGS***

TRIPPING/ALARM

***OPTIONS***

2. Data Review

By pressing Data Page key the LCD displays the

following headers:

MEASURED DATA

--

CALCULATED DATA

--

LOGICAL INPUTS -

CONTACT STATUS

STATISTICAL DATA

--

FAULT DATA

--

3. Test Messages

By pressing Test key and then Select key the LCDdisplays the following headers:

TEST/MAINTENANCE

***OPTIONS***

RUN SELF TEST ?

PUSH (+) TO RUN

PROGRAM VERSION

MPC060995MODBUS

STORE ENABLE

DEFAULT SETTINGS

RESET & STORE

STATISTICAL DATA

4. Flash MessagesFlash messages are displayed as a response to an event.Examples:

DATA SAVED OK

WRONG DATA SAVED

WRONG PARAMETERS

DATA SAVED OK

5. Constant MessagesMessages which are displayed upon fault.Examples:

TRIP:

MAX START TIME

ALARM:

THERMAL PREALARM

Notes :1. Pressing Store key while the LCD displays an "Actual Data" parameter, will store this parameter as default display.

If no key is pressed for more than five minutes, this parameter will be constantly displayed.2. Pressing Store key while the LCD displays a header, will store this header as the default display. If no key is pressed

for more than five minutes this header will be constantly displayed.


11/38

LCD Display

10


12/38

Menu Configuration

11


13/38

Menu Configuration

12


14/38

Parameter Settings

COMMUNICATION

SETTINGS

Display Description

Drive Number

0

This parameter has no effect on

MPR operation.(For customer convenience

only).Range: 0 320Increments of: 1

Baud Rate9600

Serial Link communicationspeed in BPS. Disconnect and

then reconnect auxiliary supplyafter any change of baud rate.Range: 1200, 2400, 4800, 9600.

Serial Link No.248

MPR Address on Serial Link.

RS485 Allows a maximum of32 MPRs on a twisted pair.

For convenience inprogramming the number ofserial links is extended.Range: 1 247, 248 = Off.Increments of: 1

Common Address

1Not Used

Common Address 1, for futureenhancementRange: Not used / Used

Common Address2Not Used

Common Address 2, for futureenhancementRange: Not Used / Used

Common Address

3Not Used

Common Address 3, for futureenhancementRange: Not Used / Used

13


15/38

Parameter Settings

SYSTEM PARAMETER

SETTINGS

Display Description

Line Voltage415 Volt Rated Line to Line MainsVoltage.Range: 100V - 22KVIncrements of : 5V to 1KV

100V above 1KV

VT PrimaryVT not connected

Primary voltage of mainsVoltage Transformers.Transformer should be used forline voltages above 690V.Range: not connected,

100V - 22KVIncrements of : 10V to 1KV

100V above 1KV

Note: When only one VT is used for voltagemeasurement decrease VT primary voltage setting by a

factor of 3) . eg .1.73.( Example : If mains voltage, line to line is 3300V and

only one VT is used, set "VT Primary"

3300/1.73 1900V

VT secondaryVT not connected

Secondary voltage of mains

Voltage TransformerRange: not connected,

95V - 660VIncrements of : 5V

Motor FLC100 AMP.

Motor Full Load (rated)Current.

Range: 1 - 2000AIncrements of : 1A to 100A

5A above 100A

CT Primary100 Amp

Primary rated current of CurrentTransformer.(Secondary 1A or 5Aterminals).

Range: 1 - 2000A.Increments of : 1A to 100A

5A above 100A

E/F CT Primary100 Amp.

Primary rated current of EarthFault Transformer.(Secondary 1A or 5Aterminals).Range: 1 - 2000A

Increments of : 1A to 100A5A above 100A

Note: When three C/Ts are connected in residual earthfault connection (see page 7) the E/F CT Primary valueis the same as CT Primary value

Display Description

E/F Alarm5% of FLC Earth Fault current initiatingan Alarm (in % of MotorFLC)Increments of: 1%

E/F Alarm Delay10 sec.

Earth Fault Alarm Delay.Range: 1 - 60 sec.Increments of: 1 sec.

E/F Trip10% of FLC

Earth Fault current initiating atrip (in % of Motor FLC)

Range: 1-100% of Motor FLCIncrements of: 1 %.

E/F Trip Delay0.5 sec.

Earth Fault Trip Delay.Range: 0 - 2 sec.

Increments of: 0.1 sec.

Current InhibitOFF

Inhibits opening of Aux.2(Trip) Relay when shortcircuit current exceeds a setvalue, to prevent contactor'sdamage.Range: 400-1000% of Motor

FLC, OFF

Increments of : 10%

Note : When contactors are not used to trip the motor(circuit breaker application) set to OFF.

WARNINGThe MPR will not protect the motor against highcurrent above the current inhibit setting. It is the

customer's responsibility to ensure that the motor isprotected against fault current, above Current Inhibitby external protection.

Start/Stp SignalMomentary

Not in use

Starting Method

Direct on Line

Note in use.

14


16/38

Parameter Settings

SYSTEM PARAMETER

SETTINGS

Display Description

Max Time in Star

10 sec.

Not in use

Transition Time200 msec.

Not in use

Star to Delta at150% of FLC

Not in use

Lo Spd Motor

FLC

10 AMP.

Not in use

Low Spd t6x Time10.0 sec.

Not in use

Designate AUX.1Alarm

Enables Designation of Aux.Relay no. 1 as Alarm- FailSafe operation (options otherthen Alarm can not be used).

AUX.1 Delay0 sec.

Time delay for AUX.1 relay.Range: 0 - 120 sec.Increments of : 1 sec.

Designate AUX.2

Trip

Enables Designation of

Auxiliary Relay no. 2 as:* Trip.

* Trip - Fail Safe(other options then the abovecan not be used).

AUX.2 Delay0 sec.

Time delay for AUX.2 relay.Range: 0 - 120 sec.Increments of : 1 sec.

Note: Aux. 2 delay has no

effect when configured asTrip or Trip-Fail Safe

Protection OnlyYes

Must be configured as "Yes".Range: Yes

No

Rated PWR

Factor0.880

Motor rated (Nameplate)power factor. Required forcalculating rated power.(based on Motor FLC andLine Voltage).

Range : 0.5 - 0.99Increments of : 0.01

KWH per PULSE

Off

When enabled, O/L relay

initiates number of KWH perpulse.Range : Off, 1 100

Increments of: 1.

15


17/38

Parameter Settings

VOLTAGE

SETTINGS

Display Description

U/V Setting

80% of Un

Under Voltage level, (in % of

nominal voltage). Fault occurswhen voltage is below set valuefor more than U/V delay.Range: 50 - 95 % of UnIncrements of : 1 %

Note: MPR 2000 version D is factory set so UnderVoltage protection is also active when the motor isstopped. (Dip Sw. 4 on CPU PCB at ON position - see

page 7)

U/V Delay 5.0sec. Under Voltage time delay.

Range: 0.2 - 10 sec.

Increments of : 0.1 sec.

U/V Auto RestartNo.

Not in use

Restart Delay Not in use

O/V Alarm Over Voltage alarm level. Fault

occurs when voltage is aboveset value for more than 1second (fixed delay).

115% of Un

Range: 100 - 120 % of Un.Increments of : 1%

Note: O/V ALARM delay ispreset to 1 sec.

O/V Trip120% of Un

Over Voltage trip level. Faultoccurs when voltage is aboveset value for more than O/VTrip Delay.

Range: 100 - 120% of Un.Increments of: 1%.

O/V Trip Delay1 sec.

Over Voltage trip delay.Range: 1 100 sec.

Increments of: 1 sec.

16


18/38

Parameter Settings

17

CURRENT

SETTINGS

Display Description

Max. Start Time

10 sec.

Maximum permitted starting

time. End of starting is assumedwhen motor's current decreases

below 110% of Overload Settingvalue.Example: for 105% OverloadSetting (default value), end ofstarting is assumed when currentdecreases below 115% of Motor

FLC.(110% x 105%=115.5%)Range: 1 250 sec.Increments of: 1 sec.

Number ofStarts10

Maximum Permitted number ofstarts during "Starts Period".Alarm/Trip screens will display

"Too Many Starts"Range: 1 - 10Increments of : 1

Starts Period

30 min.Time period during which thenumber of starts is counted.Range: 1 60 min.

Increments of: 1 min.

Start Inhibit

30 minTime period during whichstarting is disabled after "TooMany Starts" trip. After StartInhibit time, Auto Reset will

operate (if enabled), in order toreset "Too Many Starts" trip.

Range: 1 - 60 min.Increments of: 1 min.

U/C Alarm50% of FLC

Under Current alarm level. Faultoccurs when current decreasesbelow set parameter for morethan U/C Alarm Delay.

Range: 10-90 % of Motor FLC.Increments of: 1%

U/C Alarm

Delay2 sec.

Under Current alarm delay.

Range: 1 60 sec.Increments of: 1 sec.

U/C Trip40% of FLC

Under Current trip level. Fault

occurs when current decreasesbelow set parameter for morethan U/C Trip Delay.Range: 10 - 90% of Motor FLC.Increments of : 1%

U/C Trip Delay5 sec.

Under Current trip delay.

Range: 1 - 60 sec.Increments of: 1 sec.

Load Increase

Al120% of FLC

Load Increase Alarm. Fault

occurs when current increasesabove set parameter for morethan fixed time period of 5 sec.

Display Description

Range: 60-150% of Motor FLC.

Low Set Setting400% of FLC

Low Set current - Stall / Jamprotection. Operative after start

process ended. Indicates thatcurrent exceeded set value formore than Low Set Delay.Range:100-500%of Motor FLC.Increments of : 10%

Low Set Delay2.0 sec.

Time delay for Low Set current.Range: 0.5 - 10 sec.Increments of: 0.5 sec.

High Set Setting

800% of FLC

High Set Current - Short circuit

protection. Operative duringstarting and running. Indicatesthat current exceeded set valuefor more than High Set Delay.Range:400-1200%of MotorFLCIncrements of: 10%

High Set Delay2.0 sec.

Time delay for High Set current.Range: 0 - 4 sec.Increments of: 0.1 sec.

Note: When set to 0, actual delay is less than 70

msec.

Overload Setting105% of FLC

Lower threshold for O/LprotectionRange: 60 130 % of Motor

FLC.Increments of : 1%

Thermal Alarm80% of Capacity

Thermal Capacity alarm value.

Range: 50 - 99 % of maximumthermal capacity.Increments of : 1%

t6x Time10.0 sec.

Overload trip time of cold motor

at 6 times Motor FLC. (The time

required to heat ThermalCapacity from 0 to 100 % at 6 xFLC).

Range: 0.5 - 120 sec.Increments of : 0.5 sec.

Hot/Cold Ratio50%

The ratio between thermalCapacity available for starting ahot motor and thermal capacityavailable for starting a coldmotor. (A higher setting allows

for a longer starting time of hotmotor before tripping).

Range:20-100% of ThermalCapacityIncrements of: 1%.


19/38

Parameter Settings

18

CURRENT

SETTINGS

Display Description

Cool Time

Factor

5

The Ratio between cooling timeconstant of stopped motor to the

heating/cooling time constant ofrunning motor.Range: 1 - 15Increments of: 1

Stall Time Fact.50%

Stall Time Factor. The ratio

between motor thermal timeconstant when speed switch isclosed (indicating slow speed) tothermal time constant with openspeed switch - (indicating highspeed). Operative when speed

switch is used.Range: 20 - 100 %Increments of: 1%

O/L Reset

Method HandSelects Auto or Manual resettingmethod after thermal capacity

decreases below 50%.Auto: Automatic resetting

Hand: Manual resettingRange: Hand / Auto.

Note: O/L Reset Method can also be set throughTripping/Alarm Page, the latest setting will be valid.

Unbal. Current

(Trip)15% of FLC

Unbalance Current trip level.

Fault occurs only if actualUnbalance is greater than the setvalue. See figure 6 for time delay.Range: 10 - 40 % of Motor FLC.Increments of : 1%

Notes :

1. Unbalance Current (Alarm) automatically sets

itself to 50% of "Unbalance Current" trip, (figure 6 fortime delays)2. Unbalance Current alarm will be activated whenUnbalance Current exceeds 50% of the UnbalanceCurrent trip level for more than 1 second (fixed timeperiod).

Unbal. Max.

Time30 sec.

Unbalance curve selection. Timedelay at 10 % of Unbalance. Faulttime inversely relates to the actualunbalance (See page 28).Range: 20 - 120 sec.Increments of: 1 sec.

Under Power

25%

Under power level. In percent of

rated power.Range : 5 - 99%

Note: Rated Power is calculated through:

P = 3* Line Voltage * Motor FLC * Rated PowerFactor

Under Power

Del.30 Sec.

Under Power time delay.Range: 1 - 120 Sec.

Increment of: 1 Sec.

TEMPERATURE

SETTINGS

Display Description

Ch. 1 2 3 SensorRTD

Determines type ofTemperature sensor (when

used) for channels 1, 2 and 3.Range: Thermistor

RTD (PT100)

See DIP SWITCH selection to display C or (pg.6)

Thermistor Type

NTC (-Ve)Determines the type ofthermistor (In case Thermistorwas selected above).Range: NTC (-Ve)

PTC (+Ve)

Ch. 1 2 3 Alarm

140 C

Alarms when actual resistance

(Temperature) increasesabove the set value.Range : 100 - 240 or

0 200 C.

Increments of: 1 or 1C

Channel 4 Alarm140 Ohm

Alarm values - channel 4.Same as CH. 1 2 3 Alarm.Note: Channel 4 can beconnected only to sensor of

type RTD.

Channel 5 Alarm140 Ohm

Alarm values - channel 5.Same as CH. 1 2 3 Alarm.

Note: Channel 5 can beconnected only to sensor of

type RTD.

Channel 1 2 3

Trip

150 C

Trips when actual resistanceincreases above the set value.Range: 100-240 or

0 200 C

Increments of : 1 or 1C

Channel 4 Trip

150 C

Trip value for channel 4. See

previous explanation for CH.1 2 3 Trip.

Channel 5 Trip

150 C

Trip value for channel 5. Seeprevious explanation for CH.1 2 3 Trip.

Notes :1. Channels 4 and 5 are for RTD's only.2. RTD functions have a fixed time delay of 2 Sec.

3. Open (unconnected) RTD causes Alarm faultwhile Trip fault is blocked.


20/38

Tripping/Alarm Options

TRIPPING / ALARM

OPTIONS

FUNCTIONAL ASSIGNMENT

Protection functionEach of the MPR Protection can be assigned to each ofthe following functions :

1. Trip only2. Alarm only3. Alarm and Trip4. Disabled

1. Trip only - Set Trip: Enable

Set Alarm: DisableUpon fault:

Trip LED illuminates.

Aux.2 Relay: if designated "Trip", energizes. if

designated to "Trip - Fail Safe", de-energizes.

2. Alarm only- Set Trip: DisableSet Alarm: Enable

19

Upon fault:

Alarm LED illuminates.

Aux.1 Relay, if designated to "Alarm",de-energizes (Fail-Safe operation).

3. Alarm and Trip-Set Trip: Enable

Set Alarm: EnableUpon fault:

Trip and Alarm LEDs illuminate.

Aux.1 Relay, if designated to "Alarm",de-energizes.

Aux.2 Relay, if designated to "Trip", energizes.If designated to "Trip - Fail Safe", de-energizes.

4. Disable- Set Trip: Disable

Set Alarm: Disable

ResettingEach MPR Protection can be assigned to any of thefollowing functions:

1. Auto Reset2. Panel Reset3. Communication Reset

(See notes on page 35 and Communication

Manual)

1. Auto Reset -When required Set"Auto Rst: Enable"If not required Set "Auto Rst: Disable"

The MPR resets itself automatically when the faultcause disappears. The Auto Reset is activated after a

2-sec. delay.

Note: It is recommended to always Disable

Auto Reset.

On some faults, when Auto Reset is enabled, theMPR trips and after a 2-sec. delay resets itselfautomatically. The fault message on the LCD

disappears after 2 sec.Example: On "U/C Trip", when Auto Reset function

is Enabled, the contactor opens. After 2 sec.automatic Reset occurs. The motor stops and the"U/C Trip" message is displayed for only 2 sec.

2. Panel Reset - Set Panel RST: EN.When Panel resetting is not permitted set Panel RST:

DIS. For critical faults, such as "Overload" and"Earth Fault", it is good practice to prevent PanelResetting.An authorized person (key holder) can always reset

any fault.

Notes:IfAuthorized Key is locked, front panel Resetting isactive when:

a. Panel Reset parameter is "enabled", and

b. Local/Remote input is in "Local" mode, andc. There is no Start signal.

3. PLC Reset - Not in use.


21/38


20

1. Maximum Start Time

Fault occurs when starting time is longer then"Maximum Start Time" setting. The MPR assumesend of starting process, when motor currentdecreases below 110% of the "Overload Setting"

value.

For a default value of 105%, end of starting processis detected at 115% of motor Full Load Current(FLC).

Note: The following describes the four options

available for Max Start Time (Trip, Alarm, AutoReset, Panel Reset).The same options with their settings are applicable forallother faults.

Display Description

Max. Start TimeTrip: Disable

When Enabled, and in case ofstarting time exceeds "MaxStart Time" setting, theinternal relays A and B will

open, opening motorcontactors.

If "Designate Aux.2"parameter was set to Trip,Aux.2 relay energizes.If "Designate Aux.2"

parameter was set to Trip -Fail Safe, Aux.2 relay

de-energizes. Trip condition islatched. Reset can be doneusing any Reset method.Range: Disable

Enable

Max. Start TimeAlarm: Enable

When Enabled, and in case ofstarting time exceeds MaxStart Time setting, Aux.1relay de-energizes (ifDesignate Aux.1 parameterwas set to Alarm). Alarm

condition is latched. Reset can

be done using any Resetmethod.Range: Disable

Enable

Max Start TimeAuto RST: DIS.

When Enabled, Automatically

resets Max Start Time faultafter motor stops, enablingrestarting.Range: Disable

Enable.

Max Start TimePanel RST: En. When Enabled, allows frontpanel resetting.Range: Disable

Enable.

2. Too Many StartsFault occurs when number of starts exceeds"Number of Starts" setting during "Starts Period"time.Auto Reset, when Enabled, occurs after "Start

Inhibit" time elapsed

3. Under Current Pre-Alarm(U/C PRE-ALARM)For a running motor, fault occurs when currentdecreases below "U/C Pre-Alarm" setting for a timelonger than "U/C Alarm Delay" setting.

Auto reset, when Enabled, occurs when the currentincreases above "U/C Pre-Alarm" level, or whenmotor stops or trips.

4. Under Current Trip (U/C TRIP)For a running motor, fault occurs, when current

decreases below U/C Trip setting for a time longerthan U/C Trip Delay setting.Auto reset, when Enabled, occurs when the currentincreases above U/C Trip level, or when motorstops or trips.

5. Load Increase Alarm (LOAD INCREASED)

Operative only after start process ended (aftercurrent decreased below 110% of "OverloadSetting" value). Fault occurs when motor averagecurrent is above "Load Increase Alarm" setting formore than 5 seconds .Auto reset, when Enabled, occurs when current

decreases below the Load Increase Alarm setting,or when motor stops or trips.

6. Low Set Overcurrent (LOW SET O/C)Identifies Stall condition for a "running" motor.Fault occurs when starting process has ended and

motor average current increases above Low SetSetting value for more than "Low Set Delay" time.Auto reset, when Enabled, occurs when currentdecreases below "Low Set Setting" level, or whenmotor stops or trips.

7. High Set Overcurrent (HIGH SET O/C)Identifies short circuit condition. Fault occurs whenany of the motor's line currents exceeds "High SetSetting" value, for more than "High Set Delay"time.Auto reset, when Enabled, occurs when current

decreases below High Set Setting value, or whenmotor stops or trips

Notes:1. True RMS line currents are measured,

disregarding the average "DC" value. It is

designed to prevent nuisance tripping at thevery beginning of the starting process(during which DC decaying current is

superimposed on the AC Current).2. Minimum setting of "High Set Delay" is 0.At 0 setting, the actual time delay is less than70 mSec.


22/38


21

3. "High Set Overcurrent" trip is preventedwhen the highest of any of the line currentsexceeds Current Inhibit setting. It is designedto prevent opening of motor contactor underhigh short circuit conditions to protect it's

contacts from being damaged. Fault display:

"High Set O/C".4. Overload Trip overrides current inhibit setting.

8,9. Thermal Prealarm and Thermal Trip

The MPR simulates the thermal condition of the

motor and stores it in a thermal register. The"heating" of the thermal register (i.e. it's increment)is related to the square of the current (the highest ofthe three line currents). The rate of "cooling" of thethermal register (i.e. it's decrement) is directlyrelated to the motor's present Thermal condition.

The content of the thermal register is called"Thermal Capacity" simulating motor temperature.Thermal capacity of 100% is equivalent to a motorrunning at the absolute maximum allowedtemperature. At this point the motor must betripped."Thermal Trip" is defined by the t6x setting.

"Thermal Prealarm" have a range of 50-99% of"thermal Trip".The following parameters are used to calculate the"Thermal Capacity".

Overload Setting

Thermal trip is not possible as long as current isbelow the "Overload Setting" value. For a standardmotor, leave "Overload Setting at it's default valueof 105%. When current increases above this value atrip will occur after some time. This time dependson the present value of the "Thermal Capacity" on

the current level and on "t6x Time" parameter.

t6x Time

Tripping time of a "Cold" motor carrying a currentof 6 times FLC (when "Overload Setting" value isset to 105%). See figure 4 and 5.

Hot/Cold Ratio

This parameter, determines the ratio of theavailable "Thermal Capacity" for a Hot motor and aCold motor.The "Thermal Capacity" of a hot motor, is:

(100% - Hot/Cold Ratio)Cold Condition - When the motor is stopped for along time, it's "Thermal Capacity" is zero.Therefore, for a cold motor, all the 100% of"Thermal Capacity" are available for heating(before a trip occurs).

Hot Condition - When a motor is running, it'stemperature increases, and after it has been runningfor a long time at a current, slightly below the

Overload Setting value, a "Hot Condition" has beencreated. Now, less than 100% of the "ThermalCapacity" is available.

Example: If Hot/Cold Ratio is set to 60%, then for a"Hot" motor, 40% of the "Thermal Capacity" wereused, leaving 60% for additional heating.For a motor, running for prolonged time, at lowerthan "Overload Setting" current value, the "Thermal

Capacity" is related to the square of the current.

For Example, if motor current is only of theOverload Setting level, then (K=()*40%=10%)only 10% of the "Thermal Capacity" has been used,leaving 90% for additional heating.

Cool Time Factor

The ratio between the cooling time constant of astopped motor and heat/cool time constant of arunning motor.

Stall Time Factor

The ratio between motor thermal time constant

when speed switch is closed (indicating slow speed)to thermal time constant (an open speed switch -indicating high speed). Operative when speedswitch is used.Range: 20 - 100 %Increments of: 1%

Speed Switch

Not in use

Thermal Capacity Reset Method

Due to the importance of the Thermal protection adifferent reset method is used.

Reset of Thermal Prealarm is prevented untilThermal Capacity "cools down" below 50 % ofmotor thermal capacity.

If urgent starting is needed before thermal capacityhas reduced below 50% press Reset key twice

within 1 second, which will reset the thermalregister back to 0.

Notes:

1. It is impossible to reset a "Thermal Trip"condition until "Thermal Capacity " has

reduced below 50%.2. Only "Authorized key" holder can reset the

Thermal Capacity. It is not possible to resetthermal capacity through PLC hard wiresand communication.

3. If no data is available from the motor

manufacturer, it is recommended to leave allthe above parameters to their default values.The last value of the Thermal Capacitiesstored in the non-Volatile memory duringauxiliary supply failure or disconnection. Onrestoration of supply, the previous value will

be re-established. Figures 4 and 5 specifyoverload trip time delay for several cases.Thermal Pre-alarm fault display: "Thermal

Prealarm". Thermal trip fault display :"Thermal Trip".4. "Thermal Trip" overrides "Current Inhibit"

settings.


23/38


10. Unbalance AlarmCurrent unbalance is the difference betweenmaximum and minimum values of the motor's threeline currents, divided by the larger motor'smaximum line current or Motor FLC. This method

prevents nuisance alarming at low currents. The

MPR automatically initiates an alarm, one secondafter the actual unbalance value increases above50% of "Unbalance Current Trip" setting.Auto reset, when Enabled, occurs when the actualunbalance decreases below 50% of "Unbalance

Current Trip" setting, or when motor stops or trips.

11. Unbalance TripUnbalance Current setting determines the minimumvalue of calculated unbalance for tripping.If the actual unbalance exceeds Unbalance Current

setting, a time delay is initiated. The time delay isrelated to Unbal. Max. Time parameter, and to theinverse of the square of the actual unbalance(smaller delay for larger unbalance). Minimumvalue of the time delay is 1 second.Auto reset, when Enabled, occurs when the actualunbalance decreases to below Unbal. Current

setting or when motor stops or trips.Use figure 6 (page 28) to select the required triptime for any unbalance value. Select the requiredtripping time at 10% unbalance (on the Time axisbetween 20 and 120 sec). Draw a line, beginning atthe selected point of your time axis towards the

unbalance percent line, parallel and between the20sec and 120sec lines.Example: Selecting 80 seconds delay at 10%unbalance will cause a Trip at 40% unbalance after5 seconds delay.

12. UndervoltageOperative after start signal Fault occurs when theaverage of the three line to line voltages decreasesbelow "U/V Setting" value, for more than "U/VDelay" setting. It is possible to connect singlephase voltage to the line voltage inputs (terminals33, 34, 35) and link them together (see page 6 -

Line Voltage).Auto reset, when Enabled, occurs when averageline voltage increases above the U/V Setting value,or when motor stops or trips.

13. Over Voltage Pre-Alarm(O/V PRE-ALARM)

Operative only after motor is started. Fault occurswhen the average of three line to line voltagesincreases above "O/V Alarm" setting, for more than1 second.Auto reset, when Enabled, occurs when averageline voltage decreases below "U/V Alarm" value, or

when motor stops or trips.

14. Over Voltage Trip

Operative after start signal. Fault occurs when theaverage line to line voltage increases above"Overvoltage Trip" setting, for more thanOvervoltage Trip Delay setting. Auto reset, when

Enabled, occurs when average line voltagedecreases below Overvoltage Alarm value, or whenmotor stops or trips.

15. Phase LossThe MPR calculates voltage unbalance according to

the difference between maximum and minimumvalues of the line to line voltages, related to the"Line Voltage" setting. Fault occurs when theunbalance level exceeds 20% for more than 2seconds.

Auto reset, when Enabled, occurs when the actualUnbalance decreases below 20%.

16. Phase SequenceAlways operative. Fault occurs when the phasesequence is reversed for more than 2 seconds.

Disable Phase Sequence both for Trip and forAlarm, if only a single phase is connected to thevoltage input terminals.Auto reset, when Enabled, occurs when a correctphase sequence is detected.

17,18,19. Temperature Pre-Alarm(TEMP n PREALARM) n=1-5High temperature condition is detected according tothe measured resistance of the temperature sensors(RTD or Thermistor). RTD is a positivetemperature coefficient device. Thermistor,however, can be either a positive (PTC) or negative

(NTC) temperature coefficient type.For RTD or PTC Thermistor, temperaturepre-alarm level is detected when the measuredresistance of any channel exceeds it's pre-Alarmsetting.For NTC Thermistor, temperature pre-alarm level is

detected when measured resistance is below it'sChannel Alarm setting. Fault occurs, whentemperature, of any channel, exceeds the pre-alarmvalue for more than 1 sec. Auto reset, whenEnabled, occurs when the temperature decreases tobelow the Pre-Alarm level.

Notes:

1. or C is selected by removing rear panelto set dip switch on CPU board,SW1.3 = ON (RTD only)

2. Refer to page 25 for conversion table

between and C

22


24/38


20,21,22 Temperature Trip(TEMP n TRIP) n=1-5See previous paragraph on Temperature Pre-Alarm.For RTD or PTC Thermistor, temperature trip levelis detected when measured resistance of any

channel exceeds it's Channel Trip setting.

For NTC Thermistor, temperature trip level isdetected when measured resistance is below it'sChannel Trip Setting. Fault occurs, whentemperature, of any channel, exceeds the trip valuefor more than 0.5 sec.

Auto reset, when Enabled, occurs when thetemperature decreases below the trip level.

23. Earth Fault Pre-Alarm (E/F PRE-ALARM)Fault occurs when Earth current exceeds "E/FAlarm" setting for more than "E/F Alarm Delay"

setting.Auto reset, when Enabled, occurs when Earthcurrent decreases below "E/F Alarm" setting.

24. Earth Fault Trip (E/F TRIP)Fault occurs when Earth current exceeds "E/F Trip"setting for more than "E/F Trip Delay" setting.

Minimum setting of "E/F Trip Delay" is 0. At 0setting, the actual time delay is less than 70 msec.Auto reset, when Enabled, occurs when Earthcurrent decreases below "E/F Trip" setting.

Note: "E/F Trip" is prevented when the highest of

any of the line currents Exceeds "CurrentInhibit" value It is designed to preventopening of motor contactor under high shortcircuit conditions, to protect it's contactsfrom being damaged.

25. Serial Port Failure(SER. PORT FAILURE)Fault occurs when the MPR detects threeconsecutive transmissions from the host computer,in which a parity bit, and/or the CRC word arewrong.Auto reset, when Enabled, occurs when a

transmission from the host computer is receivedproperly.

26. Internal FailureThe MPR incorporates a Built In Test program.Operating the self-test program is done from a

special "Test/Maintenance Options" page. "SelfTest Passed" message, after completion of the builtin test, indicates that the MPR functions properly."Self Test Failed", together with an error code (forfactory use only) and Internal Fault LED "ON"indicates a fault condition.

Auto reset, when Enabled, occurs when asuccessful test was performed and its result is "SelfTest Passed" message.

27. External Fault 1

Not in use

28. Control Circuit Open

Not in use

29.Welded Contactor

Not in use

30. External Fault 2Not in use

31. External Fault 3 (Test)

Not in use

32,33. RTD 4 & 5 Temperature Pre-Alarm(TEMP 4 PREALARM) (TEMP 5 PREALARM)High temperature condition is detected according toRTD measured resistance. Fault occurs, whenmeasured resistance of any channel exceeds it's

Channel Pre-Alarm value for more than 1 sec.Auto reset, when Enabled, occurs when RTDresistance decreases below the pre-alarm level.

34,35. RTD 4 & 5 Temperature Trip(TEMP 4 TRIP) (TEMP 5 TRIP)High temperature condition is detected according to

RTD measured resistance. Fault occurs, whenmeasured resistance of any channel exceeds it'sChannel Trip value for more than 0.5 sec. (factoryset).Auto reset, when Enabled, occurs when the RTDresistance decreases below the trip level.

Note: Input 4 & 5 can be only RTD's.

23


25/38


36. Under Power

For a running motor, fault occurs when motorpower decreases below "Under Power" settings fora period of time longer than "Under Power Delay"settings.

Auto reset, when Enabled, occurs when the power

increases above "Under Power" level or whenmotor stops or trips.

Note: All Power measurements and protectiondepend upon MPR receiving all 3 line voltages and

currents.

Resistance-Temperature-Device

Conversion Table (Pt.100=Platinum 100 )TEMP IN Pt.100 OHMS ( )

( C) (DIN 43760)

0 100.00

10 103.9020 107.7930 111.6740 115.54

50 119.4060 123.24

70 127.0780 130.8990 134.70100 138.50110 142.29120 146.06

130 149.82

140 153.58150 157.32160 161.04170 164.76180 168.46

190 172.16200 175.84

Note: Maximum cable resistance allowed must be 25% of RTD resistance.

More than One Alarm or TripThe MPR is designed to accept and store the first

alarm it detects. If this alarm has not been reset andan additional alarm occurs, the MPR will notdisplay the second alarm on the LCD nor assign itto the Fault Data page.

Example: If "Unbalance Alarm" occurs and then a"Thermal Pre-alarm" occurs, the MPR will continuedisplaying "Unbalance Alarm" message on both,LCD and Fault Data page. This is to assist the userin establishing the cause of the alarm.In case a trip occurs after an alarm, the trip messagewill override the alarm message.

24


26/38


Figure 4 - Overload Protection - Cold Motor

25


27/38


26

Figure 5 - Overload Protection - Hot Motor (hot/cold ratio = 0.5)


28/38


Figure 6 - Unbalance Protection

Unbalance Level Value Selection:1. Select the required trip/alarm time on the vertical axis (at 10% Unbalance).

2. Draw a horizontal line at the selected point (eg. 5 Sec.).3. Select an unbalance point (eg. 40%).4. Draw a vertical line at the selected point (the two lines intersect).5. Draw a parallel line to the diagonal lines at the intersection point.6. The new parallel line will intersect with the vertical axis (at 10 % Unbalance).7. Insert the value of the time at the intersection point (from 6) into parameter "UNBAL. MAX TIME" (eg. 80

sec).

27


29/38

Tripping/Alarm Default Settings

The following table summarizes the five factory default settings for each of the faults, and describes when is each faultactive.

Notes: It is recommended that prior to modifying this table, create a photocopy and do not scribe on the original. Markyour settings in the empty space available for each value. For operation in "Protection Only" mode, disable all PLC resetfaults.

MOTOR NUMBER (___________), APPLICATION NAME (________________________________)

In this table, (+) stands for "Enabled", (-) for "Disabled".

Fault No.Pages in

manualTrip Alarm

Auto

Reset

Panel

Reset

Plc*

DuringActive Code ANSI

1. Max Start Time 21, 17 ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Start 48

2. Too Many Starts " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Start 66

3. U/C Pre-Alarm " ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run 37

4. U/C Trip " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run 37

5. Load Increased " ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run 51L

6. Low Set O/C " ( + ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run 51R

7. High Set O/C 22, 17 ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 50

8. Thermal Prealarm " ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49S/51

9. Thermal Trip 22 ( + ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49S/51

10. Unbalance Alarm 23, 18 ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 46

11. Unbalance Trip " ( + ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 46

12. Undervoltage 23, 16 ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run + Start 27

13. O/V Pre-Alarm " ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run + Start 59

14. O/V Trip " ( + ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run + Start 59

15. Phase Loss 23 ( + ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 47

16. Phase Sequence " ( + ) ( ) ( + ) ( ) ( + ) ( ) ( + ) ( ) ( + ) ( ) Always 47

17. Temp. 1 Prealarm 19, 24 ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R

18. Temp. 2 Prealarm " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R19. Temp. 3 Prealarm " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R

20. Temp. 1 Trip 19, 24 ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R

21. Temp. 2 Trip " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R


23. E/F Pre-Alarm 15, 24 ( - ) ( ) ( + ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 50G, 64

24. E/F Trip " ( + ) ( ) ( + ) ( ) ( - ) ( ) ( - ) ( ) ( - ) ( ) Always 50N, 64

25. Ser. port Failure 24 ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) ( + ) ( ) Always 03

26. Internal Failure " ( - ) ( ) ( + ) ( ) ( - ) ( ) ( - ) ( ) ( - ) ( ) Always

27. External Fault 1*

28. Control Cir. open*

29. Welded Contactor*



32. Temp. 4 Prealarm 19, 24 ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R

33. Temp. 5 Prealarm " ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Always 49R



36. Under Power 18, 25 ( - ) ( ) ( - ) ( ) ( - ) ( ) ( + ) ( ) ( + ) ( ) Run 37

Additional options available in the MPR which correspond to ANSI codes

Lock-Out on thermal Trip 86

Controller Time Delays 02, 03Annunciator 30

* Not in use

28


30/38

Actual Data

29

MEASURED

DATA

Note: Values given below are examples only.

Display Description

Vp1 Vp2 Vp3

240 240 240 V

Phase to Neutral voltages.

Range: 100V - 12.7KV.

VL12 VL23 VL31415 415 415 V

Line to Line Voltages.Range: 100V - 25KV.

I1 I2 I3

345 343 346 ALine (motor) currents.Range: 1A - 24KA.

Earth Fault Cur.0 Amp.

Earth fault current.Range:1A - 2000A

Power48.9KW

Total motor power.Range : 0 - 30MW.

Power Factor0.89

Total (Average of threephases) motor power factor.Range : 0.0 - 1.00

T1 T2 T3

120 120 120 C

RTD/Thermistor measuredresistance. RTD Can be

presented as orC.Range:

For RTD 100 - 240or 0C - 200CThermistor 100 -30,000

T4 T5

120 120 C

RTD measured resistance.RTD Can be presented as

orC.Range: For RTD only :

100-240

or 0C - 200C

Note: All Power measurements and protection dependupon MPR receiving all 3 line voltages andcurrents.

CALCULATED

DATA

Display Description

Motor Load 90 %

of FLC

Motor current as a percentage

of Motor FLC.Range: 0-1200% of MotorFLC

Thermal Capacity20% of Capacity

Thermal register capacityTrip level = 100%Range: 0-250% of max.Thermal Capacity

Time to TripNo Trip Expected

Expected time to trip at the

present current value that isabove overload setting.Range: No trip expected 0-4hrs

Time to Start0 sec.

Expected time to start,displayed in one of the

following cases:* After "Thermal Trip". This

is the expected time of theThermal Capacity to decayto 50% of the maximum"Thermal Capacity".

* After "Too Many Starts"Trip. In this case maximumvalue of "Time to Start"equals "Start Inhibit" Time.

Range:

After "Thermal Trip": 0 - ...minAfter "Too Many Starts": 1-60

min

Unbalance Curr.1%

Unbalance current, thedifference between max. andmin. of motor's three linecurrents, related to the larger

between motor's max. linecurrent and Motor FLC.

"Time to Trip" The expected time until motor trips.(i.e. the time to reach 100% of Thermal Capacity if

the present current value is maintained). This value iscalculated and displayed on the LCD. The host

computer may read this value through the serial link,and takes corrective actions.

"Time to Start" The expected time until it ispossible to re-start after Thermal Trip or Too ManyStarts. (i.e. the time to reach 50% of ThermalCapacity). This value is calculated and displayed on

the LCD.Reset of the Thermal Capacity (different fromThermal Trip Reset), overriding time delay forre-starting, can be done only if Authorized Key isEnabled. Pressing Reset on front panel whileAuthorized Key is Enabled, displays "Reset Thermal

Capacity???" message. Pressing Reset again within 1second resets the Thermal Capacity.


31/38

Actual Data

30

LOGICAL INPUTS

CONTACT STATUS

It is possible to check the of logical input status. Usedfor checking system wiring for maintenance anddebugging purposes.

Display Description

Drive Status Available if:* Motor is stopped.* There is no active trip.* Stop contact is closed.

* Interlock and Isolatorinputs

are not locked out.Note: In "Protection Only"mode, Stop, Interlock and

Isolator inputs have no effect.Range: AvailableRunning

Not Available

Speed SwitchOpen = HighSpeed

Not in use

Authorized KeyOpen = Locked

Authorized Key input contactstatus. Range: Open =Locked

Closed = Unlocked

External Fault 1Open = Stop

Not in use


Not in use


Not in use

STATISTICAL

DATA

Note: The following values are examples only.Display Description

Total Run Time10137.5 hours

Total run time since

commissioning.Range: 0-30,000 hours.

Total # of Start1017

Total number of starts sincecommissioning.Range: 0-65535

Total # of Trips12

Total number of trips sincecommissioning.Range: 0-65535

Last St. Period5 sec.

Last start time duration.

Range: 0-255 seconds.

Last St. Peak I350 amp.

Peak current (highest of threephases) during last start.Range: 0-24000 Amp.

Energy*

234 KWH

Total Energy accumulated

since last statistical data reset.

* Available on special order


32/38

Actual Data

FAULT

DATA

Display Description

Last TripTemp. 1 Trip

Last active fault that wasEnabled as a Trip.Range: all 31 faults.

Last AlarmTemp. 1 Alarm

Last active fault that wasEnabled as an Alarm.Range: all 31 faults.

Trip I1, I2, I3110 112 109 A

Values of three line (motor)currents at time of last trip.

Range: 0-24000 amp.

Trip I00 amp.

Values of Earth Fault currentat time of last trip.Range: 0-24000 amp.

Trip V1, V2, V3277 277 277 V

Values of phase to neutral

voltages at time of last trip.Range: 0-25000 volt.

31


33/38

Test Messages

Test pageTest page can be used for initiating a built-in test procedure, displaying program version, storing factory defaultparameters into the non volatile memory, and for resetting and storing statistical data (when Authorized key is enabled).Unauthorized personnel can only view test screens.

TEST/MAINTENANCE

OPTIONS

Display Description

Run Self Test ?Push (+) to Run

Presso key to initiate thebuilt in test procedure.

Program

Version

Program version description.MPC060995Modbus

Store Enable

default settingsStores All factory defaultparameters in the non-volatile

memory. Press Store and SetPage keys simultaneously, tostore. "Data Saved Ok" messagewill be displayed for about twoseconds.

Reset & StoreStatistical Data

Resets and stores "0" for all thestatistical data.Press Reset and Data Page

keys simultaneously, to resetand store zero values in thenon-volatile memory.

The parameters are:* Total run time* Total # of starts* Total # of trips* Last start period* Last start peak I

* Last trip and pre-alarmvoltages and currents"Data Saved ok" message willbe displayed for about two

seconds.

Warning

Resetting Statistical Data resets all previousstatistical data values ! ! ! The last two actions

(default storing and resetting statistical data ) shouldbe done with care, since retrieving previous setpointparameters or statistical data is impossible.

32


34/38

Flash Messages Constant Messages

33

Display Description

The message is displayed for a short while only.Display then returns to the previous message. Flashmessages are usually displayed as a response to anoperator action.

It is used either to confirm activation of the requestedoperation, or to indicate reason for not doing so.

Flash messages are :

Data Saved OK Displayed after pressing Storekey. If an error is foundduring store process, then

following message is shown.

Wrong Data

Saved

Displayed when an error isfound in the store process.

Wrong

ParametersDisplayed after power-up, ifthe non-volatile parameter

check sum is found to bewrong.

Unauthorized

Access

Displayed after trying toStore, Reset or change value

of parameters whileAuthorized Key is open(locked)

Reset Thermal

Capacity ???

Displayed as a response to

pressing Reset key whileAuthorized Key is closed(unlocked). It indicates that a

second press on Reset keywithin 1 Sec. will resetthermal capacity to 0.

Note : This should be done with care !! ResettingThermal Capacity may prevent the MPR from

tripping for thermal overload while justified.

Thermal CapacityReset Performed

Displayed after second presson Reset Key, as explained in

the previous message.

Unable to Start

Check System

Not in use.

Self Test Passed Displayed as a response torunning the built-in testprocedure, provided all othertests were "O.K.".

Self Test FailedError Code = 32

Displayed as a response tofinding an error during theoperation of Test procedure.Error code should be reportedto Authorized Factoryrepresentative.

Display Description

Displayed, as a response to an event and not as a resultof an operator action.

Hard-Wired Start Not in use

Hard-Wired Stop Not in use

Alarm:Thermal Prealarm

Displayed when the Alarm LEDilluminates. The lower linedisplays the fault name.

Trip:Thermal O/L Trip

Displayed when the Trip LED

illuminates. The lower linedisplays the fault name.


35/38

Communications

34

The MPR is equipped with a powerful datacommunication system, operating beyond a motorprotection controller into the realm of a completemotor management system.This communication system is unmatched in its

reliability, flexibility and ease of use providing the

ideal basis for the design of a modern motormanagement system.

The MPR incorporates RS485 serial link and uses aMODBUS RTU protocol (The protocol is not included

in this document) to provide high speed dataacquisition to supervisory computers.Data formats have been carefully structured to providefast notification of alarms and continuous updates ofperformance parameters. Load control can beperformed from host computers or by PLCs.

The following information and control can be accessedthrough the communication.

* All Actual data parameters* All MPR Settings (Read & Write)* All the control commands (such as Start A, Start B,

Stop etc.)* Reset

The MPR system is user expandable. No specialengineering skills or tools are required.For small systems, the Host computer can

communicate directly with the MPR via a twistedshielded pair.For larger systems a Data Highway enables multipleMPR connection. Up to 32 MPRs can be added oneach twisted pair of the Host serial link with full accessto all MPR's.

The system also performs high-speed data acquisitionUsers therefore have a simple and friendly means ofbuilding a fully integrated monitoring and controlsystems.

System security is exceptionally high, meeting the

highest standards of protected communication in theindustry. Included in each message is a 16 bit CRC.

Small SystemMPR basic configuration with any host computer,

available protocols : 1. MODBUS RTU (binary)2. SOLCON Note: Terminate

serial link cable with 120 Ohmresistors at both ends.

Large System


36/38

Technical Specification

35

Auxiliary Power SupplyAc Power Supply: Dc Power Supply:Switch set to 115 VAC: 80 - 135VAC Low voltage version: 19 - 60VDC.Switch set to 230 VAC: 160 - 270VAC High voltage version: 85 - 300VDC.

Frequency: 45 to 65Hz. Power consumption: 20VA

Phase Current Inputs (three currents)

Method: True rms, sample time 0.5ms.Range: 0.05 to 12 * phase CT Primary amps setting.Full scale: 12 * phase CT Primary amps setting.Accuracy: 1.5%, for 0.9 to 1.5 * CT Primary amps setting.

5% above 1.5 * CT Primary

(3% + 0.02 * CT Primary) below 0.9 * CT Primary

Power consumption: 0.1VA per 1A at 1Amp. input, (Input impedance 100m )

0.5VA per 5A at 5Amp. input, (Input impedance 20m )

Earth Fault Current Inputs (one current)Method : True rms, sample time 0.5mS.

Range: 0.05 to 1.0 * E/F CT Primary amps setting.Full scale: 1.0 * E/F CT Primary amps setting.Accuracy : 3% of full scale.

Power consumption: 0.1VA per 1A at 1Amp. input, (Input impedance 100m )

0.5VA per 5A at 5Amp. input, (Input impedance 20m )

Line Voltage Inputs (three voltages, with or without neutral)Method : True rms, sample 0.5mS.

Power consumption: 0.2VAWithout VT transformer:range: 50 - 750 volts.Full scale: 750 volts.Accuracy: 1.0% of full scale.

With VT transformer:range: 50 - 750 volts * (VT Primary / VT Secondary), limited to 25KV.Full scale: 750 volts * (VT Primary / VT Secondary), limited to 25KV.

Accuracy: 1.0% of full scale.

Thermistor / RTD Inputs (Three Thermistors/RTDs & Two optional RTDs) Time delay: 0.5 0.2 Sec.

3 Thermistors (two wires) 3 or 5 RTDs (three wires)

Range: 0.1 - 30K . Range: 100 - 240 or 0C - 200CAccuracy: 0.1K up to 5K , 3% above 5K . Accuracy: 3% of resistance.

Max wire resistance: 25 .

Overload Alarm and Trip Curves (both heating and cooling)Fault time accuracy: 1 Second up to 10 seconds.

1 second 2% above 10 seconds.Threshold current level : OVERLOAD SETTING 1.5%.

Total Run TimeAccuracy: 2%.

Auto Restart CircuitAccuracy: 20%.


37/38


36

Current Unbalance Alarm and TripMethod: Unbalance = 100 * (Imax - Imin) / Ir [%]Where: Imax = max. of the three phase currents.

Imin = min. of the three phase currents.Ir = larger of (Imax , Motor FLC setting).

(to prevent nuisance tripping at low current levels)

AlarmThreshold unbalance alarm level: 50% of Unbal Current setting 2%.Alarm (fixed) time delay: 1.0 0.5 Sec.

Trip Curves

Threshold unbalance trip Level: Unbal Current setting 2%.Trip time accuracy: 1 Second up to 10 seconds.

1 second 2% above 10 seconds.

Fault Time DelaysAccuracy: 0.5 Sec. or 2% of time, which ever is greater, for all but the above mentioned faults and the

following exceptions:* High set overcurrent: When adjusted to 0 >>> 60mS 20mS. -0.1/+0.2Sec. up to 1 sec.* Earth fault trip: -0.1/+0.2Sec. for less than 1Sec. delay.

Relays Contacts

Rated load 8A/250VAC 1800VA 48Vdc, 0.25A Inductive 48Vdc, 1.0A Resistive

Maximum voltage 250VAC 125Vdc, 0.15A 125Vdc, 0.4A

Dielectric Strength1500VAC, for 1 minute, Between Ground (terminal 63) and:

* Current inputs. * Auxiliary power supply inputs - only without 1000pF suppression capacitors.* Voltage inputs. * Control terminals - only without 1000pF suppression capacitors.

True R.M.S. Measurements

Voltage, Current, and Resistance - Sampling Speed is 0.5mSec .

Power MeasurementMethod: True RMS over three phase voltages and currents.

Range: 0.1KW - 30MWFull Scale: 30MWResolution: 0.1KW below 1MW, 0.01MW above 1MW.Accuracy: For V 90 * VT Primary / VT Secondary & Power factor 0.5Two Ranges: 1. For (10% < I 150%) of CT primary, accuracy is : (2% +0.01 * CT Primary/ Motor FLC.) of

motor rated Power

2. For ( I 150%) of CT primary, accuracy is: 7% of the display reading

Power FactorMethod: Ratio between total power (P) to total apparent power (VA).

Range: 0.0 - 1.0 lagging.Resolution: 0.001Accuracy: For V 90 * VT Primary / VT Secondary & I 50% of CT Primary & Power factor 0.7 it is

0.03Temperature Range 0 C to +50 C (default - all units), -10 C to +60 C (by special order)


38/38


StandardsImpulse: Meets IEC 255-4 (1976) & Amend #1 (1979) Meets IEC 255-5 (1977)

5 kV common-mode test5 kV transverse-mode test

Surge withstand:

Oscillatory 2.5 kV peakFast transient 4 kV crest voltageIn accordance with: ANSI C37.90.1 (1990), IEC 55-4 (1976) & Amend #1 (1979) Class III, IEC 255-22-2 (1988)

Class III

RFI: In accordance with EMI standard ANSI C37.90.2

Case and Cutout Details (C:\WINDOWS\DESKTOP\MPR2000\MPR-2000-5-IM_FNL.DOC June 8, 2003)

motor prtection relay

Documents