210014-p7002-e02-0042-00_relay coordination for 400v & 6kv

DOCUMENT SUBMISSION STATUS: FOR APPROVAL

00 09-07-2013 For Construction SS RSR AK

PB 08-04-2013 Issued for Approval SS RSR AK

PA 02-04-2013 ABB Internal Review SS RSR AK

REV DATE DESCRIPTION PREPARED CHKD APPD

OWNER

EPC CONTRACTOR

EPC CONTRACTOR’S CONSULTANT

PROJECT TITLE

KDL 120MW COMBINED CYLE POWER PLANT PROJECT

SUB-CONTRACTOR

DOCUMENT TITLE

PROTECTION COORDINATION STUDY

DOCUMENT NO

210014-P7002-E02-0042-00

REV

00

DATE

09-07-2013

PAGES

6

ABB ABB PTE LTD.

PP-IMECO Consortium ENGINEERING &CONSTRUCTION

ABB

Document Title Document No. Rev Date Page

Protection Coordination Study 210014‐P7002‐E02‐0042 00 09‐07‐2013 2 of 6

C O N T E N T S

Cl. No Description Page No.

1.0 Intent 3

2.0 References 3

3.0 Exclusion 3

4.0 Relay Settings and Coordination 3

5.0 Conclusion 6

6.0 Annexure 6

ABB



1.0 INTENT

This document covers the following calculations and studies for KDL 120 MW Gas Fired

Combined Cycle Power Plant (CCPP), Indonesia.

i. Relay Settings and Coordination for 6 kV Switchgear

ii. Relay / Release setting and coordination for 400V Switchgear

iii. Motor Protection for MV Motors

iv. Thermal Overload Relay Settings for LV Motors

v. Earth Leakage Protection for LV System

2.0 REFERENCES:

a. Equipment Sizing and System Studies 210014-P7002-E02- 0001-00

b. All Equipment Data Sheet & FAT Report

c. IEEE 399 – 1997 Recommended Practice for industrial and commercial Power

System Analysis

3.0 EXCLUSIONS

a. Generator Protection

b. Generator Transformer Protection

c. 150 kV Switchyard Protection

Items b & c above are covered in “150 kV Substation Protection Setting Calculation” – 21004 –

P7001 – E15 – 0001. Item a is not in ABB Scope.

4.0 RELAY SETTINGS AND COORDINATION

Relay settings for the equipment is divided into three groups for easy understanding and coordination purpose:

1. Over current, Short Circuit & Earth fault protection and coordination

2. Equipment Protection – Motor Thermal Overload protection (MV & LV Motors)

3. Earth Leakage Protection

Left out Items like transformer restricted earth fault protection, under voltage protection and

Synchrocheck are also covered at the end.

4.1 Over current, Short Circuit & Earth fault protection and coordination

Overload & short circuit are the frequent type faults in any power system and it is protected by Over current, Short circuit & earth fault protection. Considering the probability of failure of protective equipment, backup protection is also required. This backup protection should wait the primary protection to clear fault and will isolate the fault only when primary protection fails to trip.

ABB



Relay Coordination Methodology

The primary and backup relay pairs are identified using the network topology and relay

locations as inputs.

The primary fault current and the backup fault currents are determined.

For a given CT secondary rating, different plug setting steps (pick up currents) that are

available., the plug setting for phase and earth relays is selected. It is based on the maximum

load current flowing through the protective device and unbalance factor.

The selection of TMS is the most involved task in this process and that is where the actual

primary/backup coordination occurs. Before coordination is attempted, each relay is set to its

minimum TMS. The operating time of the primary relay for close in fault is determined. If this

new TMS is greater than old TMS, the actual TMS is made equal to new TMS and again the

process is repeated. An iterative method is employed whereby several passes are made

through the list of relays. Because of the inverse nature of the relay characteristic, these

iterations converge rapidly. The procedure is same for both phase and earth fault protection.

This is enabled by changing the plug setting and primary backup relay current depending on

the type of protection.

The over-current relay coordination is done such that the relays should operate for all short

circuits in its own zone and provide backup protection for short circuit in immediately

adjoining system elements in the downstream, if the relay in that adjoining system fails to

operate.

Assumptions & Consideration

250 ms discrimination time is considered for primary and backup relays.

Minimum time discrimination = Circuit breaker opening time + Relay Overshoot +

safety margin + Relay & CT error margin

Circuit breaker opening time = 45 ms

Relay Overshoot = 20 ms

Safety margin = 50 ms

Relay & CT error margin = 100 ms

Minimum Time Discrimination required = 45 + 20 + 50 + 100 ms

= 215 ms

Hence 250 ms discrimination is considered.

ABB



No discrimination is considered between the primary and back-up relay pairs, which are

located on the same power system element (transformer primary side, secondary side and

cables) however where setting margins permit, discrimination is provided.

Plug settings of phase fault relays are computed based on the maximum load current.

An unbalance factor of 0.1 (10% unbalance) has been considered to compute the plug

settings of earth fault relays.

4.2 Equipment protection – Motor Thermal Overload Protection

Motor Thermal overload protection settings are provided based on 110% of the full load current for LV motors. The efficiency and power factor are assumed and hence full load current may vary with actual full load current. Hence setting shall be provided based on the Name Plate details of the motor at site.

For MV motors TOR settings based on 105% of the full load current for MV motors. Locked rotors protection and permissible Cold and Warm start are provided based on the MV motor Data sheet.

4.3 Earth Leakage Protection

Earth leakage protection is to ensure the human safety during earth leakage. Earth leakage settings for downstream end equipments like motors & DB’s shall be 300 mA with instantaneous trip. If upstream Earth leakage relay is available setting of 1 A with 300 ms shall be adopted if it is to be coordinated with downstream.

4.4 Restricted Earth Fault Protection, Synchronism Check & Under Voltage Protection

Settings for Restricted earth fault protection, Synchronism Check & Under voltage protection are provided in Annexure 6.

Results

The results of the over current and earth fault relay coordination study is presented in this section. The recommended phase and earth fault relay settings for 6 kV & 400 V System is presented in Annexure 1. MV & LV motor protection settings are provided in Annexure – 2 & 3 respectively. Earth Leakage relay settings are provided in Annexure 4.

Phase relay & earth relay curves for typical feeders are given in Annexure -5. These curves show minimum discrimination of 250 ms is maintained between primary and backup relays. From the curves it is observed that the equipments (Transformer, Cables etc) are protected for short circuit & overload. Curves also indicate that there is no nuisance tripping for transformer inrush and motor starting.

Three phase faults and Single line to ground faults are simulated at various locations and the operating sequence of relays are verified. No uncoordinated tripping or inadvertent relay tripping is reported. All relays operated as per coordination requirements.

ABB



5.0 CONCLUSION

Optimal settings for both over current and earth fault relays are provided.

From the sequence of operation, it is observed that relays isolate the faulty equipments as

early as possible and minimise the damage. Clear discrimination is maintained between

primary and backup relays.

From the various curves it is observed that the protection tripping are coordinated perfectly.

6.0 ANNEXURE

1. Recommended Phase & Earth Relay Settings

2. MV Motor Protection settings

3. LV Motor Protection Settings

4. Earth Leakage Relay Settings

5. Over current & Earth fault Relay curves for typical MV feeders

6. Restricted Earth Fault Protection, Synchronism Check and Under Voltage Protection

settings

ANNEXURE 1:

Recommended Phase & Earth Relay Settings

KDL Relay Settings

Sl.No SWGR Feeder Name Relay Make CT Ratio

Ip> TDS CurveIp>>

Stage 1

T>>

Stage 1Ie> TDS Curve Ie>> Te>>

1 6 kV Switchgear Bus A Incomer 3 ‐ 6.5 MVA REF 615 ABB 800 / 1 0.86 0.05 LTI 2.25 0.4 0.1 0.08 NI

2 6 kV Switchgear Bus A Cranking Motor 1 REM 615 ABB 100 / 1 0.57 1 EI 4 0.04 0.055 0.05 NI 0.55 0.04

3 6 kV Switchgear Bus A Aux Trafo 1 ‐ 3 MVA REF 615 ABB 350 / 1 0.9 0.65 EI 13 0.04 0.1 0.05 NI 0.8 0.04

4 6 kV Switchgear Bus A Aux Trafo 1 ‐ 3 MVA ‐ LV Side REF 615 ABB 5000 / 5 0.9 0.68 EI 0.1 0.26 NI

5 6 kV Switchgear Bus A Fuel Gas Compressor Motor ‐1 REM 615 ABB 200 / 1 0.7 2.2 LTI 5 0.04 0.075 0.05 NI 0.75 0.04

6 6 kV Switchgear Bus A HRSG Feed Water Pump ‐ 1A REM 615 ABB 100 / 1 0.45 1 EI 3 0.04 0.05 0.05 NI 0.45 0.04

7 6 kV Switchgear Bus A HRSG Feed Water Pump ‐ 2A REM 615 ABB 100 / 1 0.45 1 EI 3 0.04 0.05 0.05 NI 0.45 0.04

8 6 kV Switchgear Bus A Sea Water CW Pump ‐ 01 REM 615 ABB 100 / 1 0.55 0.6 EI 3 0.04 0.055 0.05 NI 0.55 0.04

9 6 kV Switchgear Bus A Incomer 1 ‐ 6.5 MVA REF 542+ ABB 800 / 1 0.86 0.05 LTI 0.1 0.08 NI

10 6 kV Switchgear Bus A Incomer 1 ‐ 6.5 MVA REF 610 ABB 800 / 1 0.1 0.1 NI

11 Bus coupler REF 542+ ABB 800 / 1 0.86 0.05 LTI 0.1 0.08 NI

12 6 kV Switchgear Bus B Incomer 2 ‐ 6.5 MVA REF 542+ ABB 800 / 1 0.86 0.05 LTI 0.1 0.08 NI

13 6 kV Switchgear Bus B Incomer 2 ‐ 6.5 MVA REF 610 ABB 800 / 1 0.1 0.1 NI

14 6 kV Switchgear Bus B Fuel Gas Compressor Motor ‐B REM 615 ABB 200 / 1 0.7 2.2 LTI 5 0.04 0.075 0.05 NI 0.75 0.04

15 6 kV Switchgear Bus B Cranking Motor 2 REM 615 ABB 100 / 1 0.57 1 EI 4 0.04 0.055 0.05 NI 0.55 0.04

16 6 kV Switchgear Bus B Aux Trafo 2 ‐ 3 MVA REF 615 ABB 350 / 1 0.9 0.65 EI 13 0.04 0.1 0.05 NI 0.8 0.04

17 6 kV Switchgear Bus B Aux Trafo 2 ‐ 3 MVA ‐ LV Side REF 615 ABB 5000 / 5 0.9 0.68 EI 0.1 0.26 NI

18 6 kV Switchgear Bus B HRSG Feed Water Pump ‐ 1B REM 615 ABB 100 / 1 0.45 1 EI 3 0.04 0.05 0.05 NI 0.45 0.04

19 6 kV Switchgear Bus B HRSG Feed Water Pump ‐ 2B REM 615 ABB 100 / 1 0.45 1 EI 3 0.04 0.05 0.05 NI 0.45 0.04

20 6 kV Switchgear Bus B Sea Water CW Pump ‐ 02 REM 615 ABB 100 / 1 0.55 0.6 EI 3 0.04 0.055 0.05 NI 0.55 0.04

21 6 kV Switchgear Bus B Sea Water CW Pump ‐ 03 REM 615 ABB 100 / 1 0.55 0.6 EI 3 0.04 0.055 0.05 NI 0.55 0.04

Existing Switchgear

1 6 kV Existing Switchgear To KDL new PP 6 kV Switchgear Siemens 600 / 5 688 A 0.5 VI 1800 A 0.4

2 6 kV Existing Switchgear Incomer Siemens 2000 / 5 2300A 0.8

LEGEND:

In Relay rated current Note:

Ip> Phase Over current pickup EI Extremely Inverse

TDS Time Dial Setting (k) LTI Long Time Inverse

Ip>> Phase Instantaneous pickup NI Normal Inverse

T>> Instantaneous time delay SI Standard Inverse

Ie> Earth Over current pickup

Ie>> Earth Instantaneous pickup

Te>> Instantaneous time delay for Earth Fault

NA Disabled

Relay Settings KDL

Over Current Relay Settings Earth fault Relay Settings

Disabled Disabled

Existing switchgear settings are provided KDL in Site meeting Dt 21.06.2013. Graphs are provided to verify the

settings

NA NA

NA

Disabled

Disabled Disabled

Disabled Disabled

Disabled Disabled

DisabledNA

Disabled Disabled

ABB

EB

Textbox

450kW

EB

Textbox

1150kW

EB

Textbox

500kW

EB

Textbox

500kW

EB

Textbox

350kW

EB

Textbox

1150kW

EB

Textbox

500kW

EB

Textbox

500kW

EB

Textbox

350kW

EB

Textbox

450kW

KDL Relay Settings

Instantaneous

Ip> Trip curve Ip> Trip curve Ip>> Ie>> Te>>

1 Load Centre HRSG MCC 1 ACB ABB E2S 08 W MP PR121/P‐LSI 800 0.4 48 10 0.4 Disabled ‐ ‐

2 Load Centre GTG 2 MCC ACB ABB E2S 08 W MP PR121/P‐LSI 800 1 12 5 0.3 Disabled ‐ ‐

3 Load Centre GTG1 MCC ACB ABB E2S 08 W MP PR121/P‐LSI 800 1 12 5 0.3 Disabled ‐ ‐

4 Load Centre CEP Pump A ACB ABB E2S 10 W MP PR122/P‐LSIG 800 0.5 12 4 0.2 0.1

5 Load Centre Essential MCC ACB ABB E2S 10 W MP PR121/P‐LSI 1000 1 36 6 0.4 Disabled ‐ ‐

6 Load Centre Utility MCC 1 ACB ABB E2S 20 W MP PR121/P‐LSI 2000 1 12 4 0.4 Disabled ‐ ‐

7 Load Centre Incomer 1 ACB ABB E6H 63 W MP

8 Load Centre Buscoupler ACB ABB E6H 63 W MP PR121/P‐LSIG 6300 0.9 12 2 0.6 Disabled 0.1 0.6

9 Load Centre Incomer 2 ACB ABB E6H 63 W MP

10 Load Centre Utility MCC 2 ACB ABB E2S 20 W MP PR121/P‐LSI 2000 1 12 4 0.4 Disabled ‐ ‐

11 Load Centre CEP Pump B ACB ABB E2S 10 W MP PR122/P‐LSI 800 0.5 12 4 0.2 0.1

12 Load Centre GTG 2 MCC ACB ABB E2S 08 W MP PR121/P‐LSI 800 1 12 5 0.3 Disabled ‐ ‐

13 Load Centre GTG1 MCC ACB ABB E2S 08 W MP PR121/P‐LSI 800 1 12 5 0.3 Disabled ‐ ‐

14 Load Centre HRSG MCC 2 ACB ABB E2S 08 W MP PR121/P‐LSI 800 0.4 48 10 0.4 Disabled ‐ ‐

Note

HRSG MCC 1 & 2, 400A Plug is used. 424.53471

MCC

REF Relay Settings are provided along with MV Feeders

Rating

(A)

Disabled

Relay Settings (400 V Load Center) for KDL ‐ 00BFA01

Sl.No Feeder Name Make Model Release

Recommended settings

Long Time (LT) Short Time (ST) Ground faultProtection

REF Relay Settings are provided along with MV Feeders

ABB

KDL Relay Settings

Instantaneous

Ip> Trip curve Ip> Trip curve Ip>>

1 HRSG MCC 1 Incomer MCCB ABB T2S 160 FF 160 PR221/P‐LS/I 160 1 6 6.5 0.25 Disabled

2 HRSG MCC 1 Preheater RCP1 MCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

3 HRSG MCC 2 Incomer MCCB ABB T2S 160 FF 160 PR221/P‐LS/I 160 1 6 6.5 0.25 Disabled

4 HRSG MCC 2 Preheater RCP2 MCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

Relay Settings (400 V HRSG MCC) for KDL 01BFA02 & 02BFA02

Sl.No MCC Feeder Name Protection Make Model ReleaseRating

(A)


Long Time (LT) Short Time (ST)

ABB

KDL Relay Settings

Instantaneous


1 Utility MCC 1Gas Compressor afer Cooler

Fan AMCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

2 Utility MCC 1 DM Water Makeup Pump MCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

3 Utility MCC 1 Closed Circuit CWP 1 MCCB ABB T4H 250 FF 160 PR221 ‐ I 160 ‐ ‐ ‐ ‐ 6.5

4 Utility MCC 1 DC & UPS System ‐ 1 MCCB ABB T5H 400 FF 400 PR221/P‐LS/I 400 0.52 3 ‐ ‐ 5.5

5 Utility MCC 1 DM Water transfer Pump MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

6 Utility MCC 1 Workshop DP MCCB ABB T4H 250 FF 200 TMA 200 1 (200A) ‐ ‐ ‐ 10 (2000A)

7 Utility MCC 1 Air Compressor Panel MCCB ABB T4H 250 FF 200 TMA 200 1 (200A) ‐ ‐ ‐ 10 (2000A)

8 Utility MCC 1 MLDB MCCB ABB T5H 400 FF 400 PR221/P‐LS/I 400 0.6 12 5.5 0.25 Disabled

9 Utility MCC 1 Plant ACDB MCCB ABB T5H 400 FF 400 PR221/P‐LS/I 400 1 12 5.5 0.25 Disabled

10 Utility MCC 1Aux Sea Water Cooling Pump

AMCCB ABB T4H 250 FF 250 PR221 ‐ I 250 ‐ ‐ ‐ ‐ 5.5

11 Utility MCC 1 Incomer ACB ABB E2S 20 W MP PR121/P‐LSI 2000 0.75 12 3 0.3 Disabled



Relay Settings (400 V Utility MCC 1) for KDL 00BFA02


(A)

ABB

KDL Relay Settings

Instantaneous


1 Utility MCC 2 Gas Compressor afer Cooler Fan B MCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

2 Utility MCC 2 DM Water Makeup Pump MCCB ABB T2H 160 FF 52 MA 52 ‐ ‐ ‐ ‐ Min (312A)

3 Utility MCC 2 Closed Circuit CWP 2 MCCB ABB T4H 250 FF 160 PR221 ‐ I 160 ‐ ‐ ‐ ‐ 6.5

4 Utility MCC 2 DC & UPS System ‐ 2 MCCB ABB T5H 400 FF 400 PR221/P‐LS/I 400 0.52 3 ‐ ‐ 5.5

5 Utility MCC 2 DM Water transfer Pump MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

6 Utility MCC 2 Air Compressor Panel MCCB ABB T4H 250 FF 200 TMA 200 1 (200A) ‐ ‐ ‐ 10 (2000A)

7 Utility MCC 2 Fire System Panel MCCB ABB T4H 250 FF 250 PR221/P‐LS/I 250 1 (250A) 3 5.5 0.25 Disabled

8 Utility MCC 2 ACDB @ Swyd CR MCCB ABB T5H 400 FF 400 PR221/P‐LS/I 400 1 (400A) 12 5.5 0.25 Disabled

9 Utility MCC 2 Aux Sea Water Cooling Pump B MCCB ABB T4H 250 FF 250 PR221 ‐ I 250 ‐ ‐ ‐ ‐ 5.5

10 Utility MCC 2 Incomer ACB ABB E2S 20 W MP PR121/P‐LSI 2000 0.75 12 3 0.3 Disabled

Relay Settings (400 V Utility MCC 2) for KDL 00BFA03


(A)



ABB

KDL Relay Settings

Instantaneous


1 ST MCC Jacking Oil Pump 1 MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

2 ST MCC Jacking Oil Pump 2 MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

3 ST MCC HP Oil Pump 1 MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

4 ST MCC HP Oil Pump 2 MCCB ABB T2H 160 FF 32 MA 32 ‐ ‐ ‐ ‐ Min (192A)

5 ST MCC incomer MCCB ABB T4H 250 FF 250 PR221/P‐LS/I 250 1 (250A) 12 7.5 0.1 Disabled

6 ST MCC Aux Oil Pump MCCB ABB T2H 160 FF 80 MA 80 ‐ ‐ ‐ ‐ Min (480A)



Relay Settings (400 V ST MCC) for KDL 03BFA01


(A)

ABB

KDL Relay Settings

Instantaneous

Ip> Trip curve Ip> Trip curve Ip>> Ie>> Te>>

1 Essential MCC incomer ACB ABB E2S 12 W MP PR121/P‐LSIG 1200 0.85 24 5 0.3 Disabled 0.2 0.4

2 Essential MCC 500 kVA DG ACB ABB E2S 12 W MP PR121/P‐LSIG 1200 0.7 24 4 0.4 Disabled 0.2 0.4

3 Essential MCC DC & UPS Bypass MCCB ABB T4H 250 FF 200 TMA 200 1 (200A) ‐ ‐ ‐ 5 (1000A) ‐ ‐

4 Essential MCC ST MCC ACB ABB E2S 08 W MP PR121/P‐LSI 800 0.4 48 5 0.2 Disabled ‐ ‐

Relay Settings (400 V Essential MCC) for KDL


(A)


Long Time (LT) Short Time (ST) Ground fault

ABB

KDL Relay Settings

Ip> TDS CurveIp>>

Stage 1

T>>

Stage 1Ie> TDS Curve Ie>> T>>

1 ACDB Incomer MCCB Micom P111 400 1 0.45 LTI 5 0.2 0.1 0.3 SI 0.8 0.2

Earth fault Relay Settings

Relay Settings (ACDB) for KDL

ProtectionSl.No MCC Feeder Name RelayRating

(A)

Over Current Relay Settings

ABB

ANNEXURE 2:

MV Motor Protection settings

of 4

Equipment protection – Motor Protection

Jam Protection:

The stalled motor protection JAMPTOC is used for protecting the motor in stall or mechanical jam situations during the running state.

Sl.No Property Setting

1 Operation On

2 Start Value 2.5

3 Operate Delay

Time 2

4 Reset Delay Time 100

Motor Start Up Supervision: STTPMSU:

Maximum no. of starts limits shall be programmed into REM 615 relay as below. Cumulative

time limit and counter red rate has been calculated based on the REM 615 relay Technical

manual.

Sl.No Motor Capacity

kW

Starting Time at 80%

Vt in s (t)

Maximum allowed No.of Hot

start (n)

Duration during

which max. no of

startups made

Cumulative time limit

Counter Red Rate

1 Sea Water Pump 355 5 2 5 6 1

2 Cranking Motor 450 4.8 2 5 6 0.96

3 Fuel Gas

Compressor 1100 5.6 2 5 7 1.12

4 HRSG Feed Pump 355 2.5 (at 85% Voltage)

2 5 6 1

STTPMSU1:

Sl.No Parameter Sea Water Pump Cranking Motor Fuel Gas

Compressor

HRSG Feed

Pump

1 Operation On On On On

of 4


Compressor

HRSG Feed

Pump

2 Operation Mode IIT IIT IIT IIT

3 Counter Red Rate 1 0.96 1.12 1

4 Cumulative time limit 6 6 7 6

5 Emer Start Red Rate 20 20 20 20

6 Restart Inhibit time 3 3 3 3

7 Motor Standstill A 0.1 0.1 0.1 0.1

Setting Group 1

1 Start detection A 0.75 0.75 1 0.6

2 Motor Start up A 2.5 3.1 4 2

3 Motor start up time 2.5 4.8 5.6 5

4 Lock rotor time 22 4 12 16

5 Str Over delay time 100 ms 100 ms 100 ms 100 ms

Thermal Overload Protection for Motor: MPTTR:

The motor thermal overload protection function MPTTR protects the electric motors from

overheating. MPTTR models the thermal behavior of motor on the basis of the measured load

current and disconnects the motor when the thermal content reaches 100 percent. The thermal

overload conditions are the most often encountered abnormal conditions in industrial motor

applications. The thermal overload conditions are typically the result of an abnormal rise in

the motor running current, which produces an increase in the thermal dissipation of the motor

and temperature or reduces cooling. MPTTR prevents an electric motor from drawing

excessive current and overheating, which causes the premature insulation failures of the

windings and, in worst cases, burning out of the motors.

The following thermal overload settings are recommended for motor feeders.

of 4

Sl.No Parameter Value

1 Overload factor 1.05

2 Alarm Thermal Value 90

3 Restart thermal Value 40

4 Negative Seq Fact 5

5 Weighting factor 50

6 Time constant normal 320

7 Time constant start 320

8 Time constant stop 500

9 Env Temperature Mode 1 (FLC only)

Non Group settings:


Compressor

HRSG Feed

Pump

1 Rated Current 0.48 0.51 0.65 0.4

2 Initial Thermal Value 80 80 80 80

Negative sequence overcurrent Protection for Motor: MNSPTOC:

The unbalance protection based on the negative-sequence current function MNSPTOC

protects electric motors from phase unbalance. A small voltage unbalance can produce a large

negative sequence current flow in the motor. For example, a 5 percent voltage unbalance

produces a stator negative sequence current of 30 percent of the full load current, which can

severely heat the motor. MNSPTOC detects the large negative sequence current and

disconnects the motor.

of 4


1 Start Value 0.08

2 Operating curve Type 15 (IEC Def Time)

3 Operate delay time 500 ms

Voltage Protection

In addition to above protection settings, Under voltage and overvoltage protection settings are

recommended for the feeders as below:

Over Voltage


1 Start Value 1.2



Under Voltage


1 Start Value 0.8



ANNEXURE 3:

LV Motor Protection Settings

Sl.NoMotor Capacity

in kWpf eff FLA OLR Range Setting CT Ratio

1 0.37 0.7 0.8 0.95 TA 25 DU 1.4 1 - 1.4 1

2 0.55 0.8 0.8 1.24 TA 25 DU 1.8 1.3 - 1.8 1.3

3 0.75 0.8 0.8 1.69 TA 25 DU 2.4 1.7 - 2.4 1.7

4 1.5 0.8 0.8 3.38 TA 25 DU 4 2.8 - 4 3.4

5 2.2 0.8 0.8 4.96 TA 25 DU 5 4.5 - 6.5 5

6 3 0.8 0.8 6.77 TA 25 DU 8.5 6 - 8.5 7

7 4 0.8 0.8 9.02 TA 25 DU 11 7.5 - 11 9.5

8 3.7 0.8 0.8 8.34 TA 25 DU 11 7.5 - 11 8.5

9 5.5 0.8 0.8 12.40 TA 25 DU 14 10 - 14. 12.5

10 9.3 0.8 0.8 20.97 TA 25 DU 25 18 - 25 21

11 11 0.8 0.8 24.81 TA 25 DU 25 18 -25 25

12 15 0.8 0.9 30.07 TA 75 DU 32 22 - 32 32

13 37 0.85 0.8 78.54 TA 25 DU 4 2.8 - 4 3 110/4

14 55 0.85 0.9 103.78 TA 25 DU 4 2.8 - 4 3.8 110/4

15 75 0.9 0.9 133.65 TA 25 DU 1.4 2.8 - 4 4 145/4

LEGEND: Note

eff efficiency

pf Power Factor

FLA Full Load Amps

OLR Over Load Relay

CT Current Transformer

LV Motor Thermal Overload Relay Settings

The efficiency and power factor are assumed and hence full load current may vary with actual full load current. Hence setting shall be provided based on the Name Plate details of the motor at site.

ANNEXURE 4:

Earth Leakage Relay Settings

Sl.NoMotor Capacity

in kWProtection Make Model Current Time

1 0.37 ELR ABB RD3 0.3 0

2 0.55 ELR ABB RD3 0.3 0

3 0.75 ELR ABB RD3 0.3 0

4 1.5 ELR ABB RD3 0.3 0

5 2.2 ELR ABB RD3 0.3 0

6 3 ELR ABB RD3 0.3 0

7 4 ELR ABB RD3 0.3 0

8 3.7 ELR ABB RD3 0.3 0

9 5.5 ELR ABB RD3 0.3 0

10 9.3 ELR ABB RD3 0.3 0

11 11 ELR ABB RD3 0.3 0

12 15 ELR ABB RD3 0.3 0

13 37 ELR ABB RD3 0.3 0

14 55 ELR ABB RD3 0.3 0

15 75 ELR ABB RD3 0.3 0

Earth Leakage Relay Settings

ANNEXURE 5:

Over current & Earth fault Relay curves for typical MV feeders

Relay2 - POC1ABBREF 615CT Ratio 350:5IEC - Extremely InversePickup = 0.9 (0.3 - 5 xCT Sec)Time Dial = 0.653x = 6.5 s, 5x = 2.17 s, 8x = 0.825 sInst = 13 (0.5 - 35 xCT Sec)Time Delay = 0.04 s

Relay1 - POC1ABBREF 542plusCT Ratio 800:5Long Time InversePickup = 0.86 (0.05 - 40 xCT Sec)Time Dial = 0.053x = 3 s, 5x = 1.5 s, 8x = 0.857 s

Cable8 - P1 - 3/C 240 mm²Copper XLPETc = 90CPlotted - 1 x 3/C 240 mm²

T2Inrush

T23 MVA (Secondary) 7.83 %ZDelta-Wye Solid Grd

Relay1 - 3P

Relay2 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

Incomer - OG

Project: 120 MW Combine Cycle GT PowerLocation: CILEGON BANTEN INDONESIAContract:Engineer: Selvakumar SFilename: C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.

Date: 06-14-2013 SN: ABBGLOBALRev: BaseFault: Phase

±

±

6 kV SWITHGEAR1

T23 MVA

Cable8

1-3/C 240

CB14

R Relay2

CB9

R Relay1

6 kV SWITHGEAR1

CB14

CB9

Cable8

1-3/C 240

Relay2

T23 MVA

Relay1

Relay1 - NOC1ABBREF 542plusCT Ratio 800:5Normal InversePickup = 0.1 (0.05 - 40 xCT Sec)Time Dial = 0.083x = 0.504 s, 5x = 0.342 s, 8x = 0.264 s

Relay2 - GOC1ABBREF 615CT Ratio 350:5IEC - Normal InversePickup = 10 (1 - 100 xCT Sec)Time Dial = 0.053x = 0.315 s, 5x = 0.214 s, 8x = 0.165 sInst = 80 (5 - 400 xCT Sec)Time Delay = 0.04 s

Relay1 - LGRelay2 - G - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

Incomer - OG


Date: 06-14-2013 SN: ABBGLOBALRev: BaseFault: Ground

±

±

6 kV SWITHGEAR1

T23 MVA

Cable8

1-3/C 240

CB14

R Relay2

CB9

R Relay1

6 kV SWITHGEAR1

CB14

CB9

Cable8

1-3/C 240

T23 MVA

Relay2

Relay1



01MBA10GT001Inrush

01MBA10GT00146 MVA (Secondary) 11.834 %ZWye Solid Grd-Delta-Wye Resistor GrdCurve Shift = 1

Relay1 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 10 Grid Bus (Nom. kV=150, Plot Ref. kV=150)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 10 Grid Bus (Nom. kV=150, Plot Ref. kV=150)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

cond

s1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

GSUT Damage Curve



Bus4

±

6 kV SWITHGEAR1

±

01MBA10

37.64 MW

CB2 R Relay10

01MBA10GT001

46/46/6.5 MVA

CB9

R Relay1

Cable25

2-3/C 240

Relay1

Cable25

2-3/C 240

Relay10 - G - 51OC1ABBREF 610CT Ratio 800:5IEC - Normal InversePickup = 10 (1 - 100 xCT Sec)Time Dial = 0.13x = 0.63 s, 5x = 0.428 s, 8x = 0.33 s

Relay1 - NOC1ABBREF 542plusCT Ratio 800:5Normal InversePickup = 0.1 (0.05 - 40 xCT Sec)Time Dial = 0.083x = 0.504 s, 5x = 0.342 s, 8x = 0.264 s

Relay1 - LGRelay10 - G - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps Bus4 (Nom. kV=6, Plot Ref. kV=6)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps Bus4 (Nom. kV=6, Plot Ref. kV=6)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

cond

s1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

GSUT Damage Curve



Bus4

±

6 kV SWITHGEAR1

±

01MBA10

37.64 MW

CB2 R Relay10

01MBA10GT001

46/46/6.5 MVA

CB9

R Relay1

Cable25

2-3/C 240

Relay1

Relay10

01MBA10GT001

46/46/6.5 MVA

Bus8

±

CB11

Open

I>

Relay6

Cable4

1-3/C 150

Cranking Motor 1

450 kW

Cable181 - 3/C 120 mm²Copper XLPETc = 90C

Relay5 - POC1ABB - NewREM 615CT Ratio 200:1IEEE - Long Time InversePickup = 0.7 (0.1 - 5 xCT Sec)Time Dial = 2.23x = 8.92 s, 5x = 6.19 s, 8x = 4.86 sInst = 5 (0.1 - 40 xCT Sec)Time Delay = 0.04 s

Fuel Gas Compressor 2-HotStall = 12 sec

Fuel Gas Compressor 2-100%1100 KW

Fuel Gas Compressor 2-80%1100 KW

Relay5 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global Fuel Gas Comp

Project: 120 MW Combine Cycle GT PowerLocation: CILEGON BANTEN INDONESIAContract:Engineer: Selvakumar SFilename: C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.OTI


Bus26

±

CB23

I>

Relay5

Cable18

1-3/C 120

Fuel Gas Compressor 2

1100 kW

Relay5

Relay5 - NOC1ABB - NewREM 615CT Ratio 200:1Normal InversePickup = 0.075 (0.05 - 5 xCT Sec)Time Dial = 0.053x = 0.315 s, 5x = 0.214 s, 8x = 0.165 sInst = 0.75 (0.05 - 40 xCT Sec)Time Delay = 0.04 s

Relay5 - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global Fuel Gas Comp



Bus26

±

CB23

I>

Relay5

Cable18

1-3/C 120


1100 kW

Relay5

Cable71 - 3/C 120 mm²Copper XLPETc = 90C

Relay3 - POC1ABB - NewREM 615CT Ratio 100:1Extremely InversePickup = 0.45 (0.05 - 40 xCT Sec)Time Dial = 13x = 10 s, 5x = 3.33 s, 8x = 1.27 sInst = 3 (0.1 - 40 xCT Sec)Time Delay = 0.04 s

HRSG Feed Pump1-HotStall = 16 sec

HRSG Feed Pump1-100%355 KW

HRSG Feed Pump1-85%355 KW

Relay3 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global HRSG Feed Pump



Bus12

±

CB12

I>

Relay3

Cable7

1-3/C 120

HRSG Feed Pump1

355 kW

Relay3 - NOC1ABB - NewREM 615CT Ratio 100:1Normal InversePickup = 0.05 (0.05 - 5 xCT Sec)Time Dial = 0.053x = 0.315 s, 5x = 0.214 s, 8x = 0.165 sInst = 0.45 (0.05 - 40 xCT Sec)Time Delay = 0.04 s

Relay3 - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global HRSG Feed Pump



Bus12

±

CB12

I>

Relay3

Cable7

1-3/C 120

HRSG Feed Pump1

355 kW

Bus5

±

CB10

I>

Relay4

Cable1

1-3/C 120

Main Sea Water Pump1

355 kW

6 kV SWITHGEAR1

±

±

T23 MVA

Cable8

1-3/C 240

CB14

R Relay2

R Relay9

Cable8

1-3/C 240

CB14

6 kV SWITHGEAR1

Relay2

Relay9

T23 MVA

Relay9 - GOC1ABBREF 615CT Ratio 5000:5IEC - Normal InversePickup = 10 (1 - 100 xCT Sec)Time Dial = 0.263x = 1.64 s, 5x = 1.11 s, 8x = 0.857 s

Relay2 - GOC1ABBREF 615CT Ratio 350:5IEC - Normal InversePickup = 10 (1 - 100 xCT Sec)Time Dial = 0.053x = 0.315 s, 5x = 0.214 s, 8x = 0.165 sInst = 80 (5 - 400 xCT Sec)Time Delay = 0.04 s

Relay9 - G - LGRelay2 - G - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 LOAD CENTRE 1 (Nom. kV=0.4, Plot Ref. kV=0.4)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

ABB Global 3 MVA Trafo

Project: 120 MW Combine Cycle GT PowerLocation: CILEGON BANTEN INDONESIAContract:Engineer: Selvakumar SFilename: C:\0 Projects\KDL\Relay Coordination\rc\KDL


±

±

6 kV SWITHGEAR1

CB14

R Relay2

Cable8

1-3/C 240

R Relay9

T23 MVAT23 MVA

Cable8

1-3/C 240

Relay9

Relay2

Relay5 - POC1ABB - NewREM 615CT Ratio 200:1IEEE - Long Time InversePickup = 0.7 (0.1 - 5 xCT Sec)Time Dial = 2.23x = 8.92 s, 5x = 6.19 s, 8x = 4.86 sInst = 5 (0.1 - 40 xCT Sec)Time Delay = 0.04 s


Fuel Gas Compressor 2-100%

Fuel Gas Compressor 2-80%

Fuel Gas Compressor 2-Hot

Relay14 - 3PRelay5 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Bus26 (Nom. kV=6, Plot Ref. kV=6)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Bus26 (Nom. kV=6, Plot Ref. kV=6)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

con

ds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

con

ds

ETAP Star 12.0.0C

MeghnaghatGas Compressor

Starting



±

Bus26

±

CB23

I>

Relay5

Cable18

1-3/C 120


1100 kW

R

Relay14

CB41 Open

Relay15 - PSiemens7SJ45CT Ratio 600:5IEC - Very InversePickup = 1.15 (0.5 - 4 xCT Sec)Time Dial = 0.53x = 3.38 s, 5x = 1.69 s, 8x = 0.964 sInst = 3 (2 - 20 xCT Sec)Time Delay = 0.4 s

Relay16 - POC1Siemens7SJ551CT Ratio 2000:5Inst = 1.15 (1 - 10 xCT Sec)Time Delay = 0.8 s

Relay14 - POC1ABBREF 542plusCT Ratio 800:5Long Time InversePickup = 0.86 (0.05 - 40 xCT Sec)Time Dial = 0.053x = 3 s, 5x = 1.5 s, 8x = 0.857 sInst = 2.25 (0.05 - 40 xCT Sec)Time Delay = 0.4 s

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Existing SWGR (Nom. kV=6, Plot Ref. kV=6)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Existing SWGR (Nom. kV=6, Plot Ref. kV=6)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

MeghnaghatExisting switchgear

Coord



6 kV SWITHGEAR1

±

±

Existing SWGR

±

I>

Relay16

I>

Relay15

Cable27

2-3/C 240

R

Relay14

CB41 Open

Relay14

CB53ABB SACE PR112Sensor = 400LT Pickup = 1 (400 Amps)LT Band = 12ST Pickup = 6 (2400 Amps)ST Band = 0.1 (I^x)t = OUTInst. Pickup = 15 (6000 Amps)

CB29ABB SACE PR121Frame = 1200 Plug = 800 AmpsLT Pickup = 1 (800 Amps)LT Band = 12ST Pickup = 5 (4000 Amps)ST Band = 0.3 (I^x)t = OUT

Cable2

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 GTG - 1 MCC MAIN (Nom. kV=0.4, Plot Ref. kV=0.4)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 GTG - 1 MCC MAIN (Nom. kV=0.4, Plot Ref. kV=0.4)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

con

ds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

con

ds

ETAP Star 7.5.0C

ABB Global LC - GT MCC



LOAD CENTRE 1

GTG - 1 MCC MAIN

Cable2

2-4/C 300

CB29

CB53

GTG - 1 MCC MAIN

LOAD CENTRE 1

Cable2

2-4/C 300

CB29

CB53

CB44ABB SACE PR121Frame = 2000 Plug = 2000 AmpsLT Pickup = 0.75 (1500 Amps)LT Band = 12ST Pickup = 3 (6000 Amps)ST Band = 0.3 (I^x)t = OUT

CB42ABB SACE PR221 (T5)Sensor = 400LT Pickup = 1 (400 Amps)LT Band = 12sST Pickup = 5.5 (2200 Amps)ST Band = 0.25s (I^x)t = INOverride = 5000 Amps

Cable11 - P


CB44 - 3P

CB34 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

ABB GlobalLC - Utility MCC -

ACDB

Project: 120 MW Combine Cycle GT PowerLocation: CILEGON BANTEN INDONESIAContract:Engineer: Selvakumar SFilename: C:\0 Projects\KDL\Relay Coordination\rc\KD


LOAD CENTRE 1

Utility MCC1

CB42

CB44

Cable11

3-4/C 300

CB34

LOAD CENTRE 1

CB44

CB16

Relay9 - POC1ABBREF 615CT Ratio 5000:5IEC - Extremely InversePickup = 0.9 (0.3 - 5 xCT Sec)Time Dial = 0.683x = 6.8 s, 5x = 2.27 s, 8x = 0.863 s


Relay9 - 3P

CB34 - 3P

CB16 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global LC IC & OG



LOAD CENTRE 1

±

R

Relay9

CB34

LOAD CENTRE 1

CB16

Relay9

CB34

CB16

CB33ABB SACE PR121Frame = 800 Plug = 800 AmpsLT Pickup = 0.5 (400 Amps)LT Band = 12Inst. Pickup = 4 (3200 Amps)

CEP-HotStall = 12 sec

CEP-80%200 KW

CEP-100%200 KW

Cable12 - P

CB33 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

ABB Global CEP.

Project: 120 MW Combine Cycle GT PowerLocation: CILEGON BANTEN INDONESIAContract:Engineer: Selvakumar SFilename: C:\0 Projects\KDL\Relay Coordination


Bus14

CEP

200 kW

CB33

Cable12

2-3/C 240

CB33

CEP

200 kW

Cable12

2-3/C 240

CB33ABB SACE PR121Frame = 800 Plug = 800 AmpsGround Pickup = 0.2 (160 Amps)Ground Band = 0.1 (I^x)t = OUT

CB33 - LG

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

ABB Global CEP.



Bus14

CEP

200 kW

CB33

Cable12

2-3/C 240

CB33

Cable31


Relay7 - POC1AREVAP111CT Ratio 400:5IEC - Long Time InversePickup = 1 (0.1 - 25 xCT Sec)Time Dial = 0.453x = 27 s, 5x = 13.5 s, 8x = 7.71 sInst = 5 (0.5 - 40 xCT Sec)Time Delay = 0.2 s

CB43ABBT3Size = 150 AmpsThermal Trip = FixedMagnetic Trip = Fixed

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Utility MCC1 (Nom. kV=0.4, Plot Ref. kV=0.4)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 Utility MCC1 (Nom. kV=0.4, Plot Ref. kV=0.4)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 7.5.0C

ABB Global Utility MCC - ACDB



Utility MCC1

±

ACDBI> Relay7

CB43

Cable31

3-1/C 120

CB42

ACDB

Cable31

3-1/C 120

CB42

Utility MCC1

Relay7

CB43

CB28ABBT3Size = 125 AmpsThermal Trip = FixedMagnetic Trip = Fixed



Cable42 - P

CB50 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 STG MCC (Nom. kV=0.4, Plot Ref. kV=0.4)

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K

Amps X 100 STG MCC (Nom. kV=0.4, Plot Ref. kV=0.4)

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

cond

s1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

Ess MCC - STG MCC



Essential MCC

STG MCC

Cable42

1-4/C 120

CB20

CB28

CB50

Essential MCC

STG MCC

Cable42

1-4/C 120

CB28

CB20

CB50

CB31Test PR121 NewFrame = 1000 Plug = 1000 AmpsLT Pickup = 1 (1000 Amps)LT Band = 36ST Pickup = 6 (6000 Amps)ST Band = 0.4 (I^x)t = OUT


LOAD CENTRE 1


CB51 - 3PCB31 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Se

cond

s1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

LC - Essential MCC



LOAD CENTRE 1

Essential MCC

Cable5

2-4/C 300

CB31

CB51

Essential MCC

LOAD CENTRE 1

CB51

CB31

Cable5

2-4/C 300

CB49Test SACE PR221 (T2)Sensor = 160ST Pickup = 6.5 (1040 Amps)ST Band = 0.25s (I^x)t = INOverride = 2000 Amps

CB49 - 3P


CB32 - 3P

10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


10K.5 1 10 100 1K3 5 30 50 300 500 3K 5K


1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Sec

onds

1K

.01

.1

1

10

100

.03

.05

.3

.5

3

5

30

50

300

500

Seconds

ETAP Star 12.0.0C

ABB Global HRSG



LOAD CENTRE 1

HRSG MCC 1

CB49

Cable10

1-4/C 120

CB32

Cable10

1-4/C 120

LOAD CENTRE 1

CB49

CB32

ANNEXURE 6:

Restricted Earth Fault Protection, Synchronism Check and Under

Voltage Protection

Restricted Earth Fault Protection:

Sl.No Parameter Values Unit Set Value

1 Reference nominal Current 1 – 100000 A 800

2 Unbiased region threshold 0.05 – 0.5 Ir 0.1

3 Unbiased region limit 0.01 – 1 Ir 0.5

4 Slightly biased region slope 0.01 – 2 ‐ 0.7

5 Slightly biased region slope 0.01 – 2 Ir 1.25

6 Heavily biased region slope 0.1 – 1 ‐ 1

7 Relay operate angle 60 – 180 Deg 75

8 Time 0.04 – 100 s 0.04

Synchronism Check:


1 Delta Voltage 0.02 – 0.4 Pu 0.05

2 Delta Phase 5 – 50 Deg 10

3 Time 0.2 ‐ 1000 s 100

Under Voltage


1 Lowest Voltage = 0 used

2 Start Value U<, U<< 0.1 – 1.2 pu 0.8

3 Time 40 ‐ 30000 ms 5000

4 Start Value U<, U<<< 0.1 – 1.2 pu 0.7

5 Time 15 ‐ 30000 ms 2000

Note:

Settings for under voltage and Synchronism check are based on our experience. Setting shall be

modified to meet the local regulations and operational requirements.

210014-p7002-e02-0042-00_relay coordination for 400v & 6kv

Documents

backup protection

primary protection

generator protection

motor protection

voltage protection

earth leakage protection

kv substation protection

coordination relay settings