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

ENGINEERING &CONSTRUCTION

PP-IMECO Consortium PROJECT TITLE

KDL 120MW COMBINED CYLE POWER PLANT PROJECT

SUB-CONTRACTOR

ABB

ABB PTE LTD.

DOCUMENT TITLE

PROTECTION COORDINATION STUDY

REV

DOCUMENT NO

210014-P7002-E02-0042-00

00

DATE

09-07-2013

PAGES

6

ABB

Document Title

Document No.

Protection Coordination Study

210014‐P7002‐E02‐0042

Rev

Date

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2 of 6

CONTENTS

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

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Document Title Protection Coordination Study

Document No.

Rev

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3 of 6

210014‐P7002‐E02‐0042

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.

2.0

Earth Leakage Protection for LV System

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.

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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.

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

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.

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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.



6.0

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

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 Relay Settings KDL Sl.No

SWGR

Feeder Name

Relay

Make

Over Current Relay Settings

CT Ratio

Earth fault Relay Settings

1

6 kV Switchgear Bus A

Incomer 3 ‐ 6.5 MVA

REF 615

ABB

800 / 1

0.86

0.05

LTI

Ip>> Stage 1 2.25

2


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


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


Aux Trafo 1 ‐ 3 MVA ‐ LV Side

REF 615

ABB

5000 / 5

0.9

0.68

EI

0.1

0.26

NI

1150kW

5


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

500kW

6


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

500kW

7


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

350kW

8


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



REF 542+

ABB

800 / 1

0.86

0.05

LTI

0.1

0.08

NI

Disabled

10



REF 610

ABB

800 / 1

0.1

0.1

NI

Disabled

Bus coupler

REF 542+

ABB

800 / 1

0.86

0.05

LTI

Disabled

0.1

0.08

NI

Disabled

0.86

0.05

LTI

Disabled

0.1

0.08

NI

Disabled

0.1

0.1

NI

Disabled

450kW

11

Ip>

TDS

Curve

T>> Stage 1 0.4

Ie>

TDS

Curve

0.1

0.08

NI

Disabled

Disabled

NA

Ie>>

Te>>

Disabled

Disabled

12

6 kV Switchgear Bus B


REF 542+

ABB

800 / 1

13



REF 610

ABB

800 / 1

1150kW

14


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

450kW

15


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


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


Aux Trafo 2 ‐ 3 MVA ‐ LV Side

REF 615

ABB

5000 / 5

0.9

0.68

EI

0.1

0.26

NI

500kW

18


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

500kW

19


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

350kW

20



REM 615

ABB

100 / 1

0.55

0.6

EI

3

0.04

0.055

0.05

NI

0.55

0.04

21



REM 615

ABB

100 / 1

0.55

0.6

EI

3

0.04

0.055

0.05

NI

0.55

0.04

688 A

0.5

VI

1800 A

0.4

NA

2300A

0.8

NA

NA

Disabled

Disabled

Existing Switchgear 1

6 kV Existing Switchgear

To KDL new PP 6 kV Switchgear

Siemens

600 / 5

2

6 kV Existing Switchgear

Incomer

Siemens

2000 / 5

NA

LEGEND: In

ABB

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

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

KDL

Relay Settings

Relay Settings (400 V Load Center) for KDL ‐ 00BFA01 Recommended settings Sl.No

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Ground fault

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

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

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

‐

‐

REF Relay Settings are provided along with MV Feeders PR121/P‐LSIG

6300

0.9

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

12

2

0.6

REF Relay Settings are provided along with MV Feeders

Note

ABB

Short Time (ST)

424.53471

4

0.4 Disabled

KDL

Relay Settings

Relay Settings (400 V HRSG MCC) for KDL 01BFA02 & 02BFA02 Recommended settings Sl.No

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Short Time (ST)

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)

ABB

KDL

Relay Settings

Relay Settings (400 V Utility MCC 1) for KDL 00BFA02 Recommended settings Sl.No

ABB

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Short Time (ST)

Instantaneous

Ip>

Trip curve

Ip>

Trip curve

Ip>>

1

Utility MCC 1

Gas Compressor afer Cooler Fan A

MCCB

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 1

Aux Sea Water Cooling Pump A

MCCB

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

KDL

Relay Settings

Relay Settings (400 V Utility MCC 2) for KDL 00BFA03 Recommended settings Sl.No

ABB

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Short Time (ST)

Instantaneous

Ip>

Trip curve

Ip>

Trip curve

Ip>>

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

KDL

Relay Settings

Relay Settings (400 V ST MCC) for KDL 03BFA01 Recommended settings Sl.No

ABB

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Short Time (ST)

Instantaneous

Ip>

Trip curve

Ip>

Trip curve

Ip>>

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)

KDL

Relay Settings

Relay Settings (400 V Essential MCC) for KDL Recommended settings Sl.No

ABB

MCC

Feeder Name

Protection

Make

Model

Release

Rating (A)

Long Time (LT)

Short Time (ST)

Ground fault

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

‐

‐

KDL

Relay Settings Relay Settings (ACDB) for KDL Sl.No 1

ABB

MCC ACDB

Feeder Name Protection Incomer

MCCB

Relay Micom P111

Over Current Relay Settings

Earth fault Relay Settings

Rating (A)

Ip>

TDS

Curve

Ip>> Stage 1

T>> Stage 1

Ie>

TDS

Curve

Ie>>

T>>

400

1

0.45

LTI

5

0.2

0.1

0.3

SI

0.8

0.2

ANNEXURE 2: MV Motor Protection settings

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.

Starting Capacity Time at 80% kW 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

Sl.No

Motor

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

1

Operation

On

On

Fuel Gas

HRSG Feed

Compressor

Pump

On

On

Page 1 of 4

Fuel Gas

HRSG Feed

Compressor

Pump

IIT

IIT

IIT

1

0.96

1.12

1

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

Sl.No

Parameter

Sea Water Pump

Cranking Motor

2

Operation Mode

IIT

3

Counter Red Rate

4

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.

Page 2 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: Fuel Gas

HRSG Feed

Compressor

Pump

0.51

0.65

0.4

80

80

80

Sl.No

Parameter

Sea Water Pump

Cranking Motor

1

Rated Current

0.48

2

Initial Thermal Value

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.

Page 3 of 4

Sl.No

Parameter

Value

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 Sl.No

Parameter

Value

1

Start Value

1.2

2


15 (IEC Def Time)

3

Operate delay time

2000 ms

Under Voltage Sl.No

Parameter

Value

1

Start Value

0.8

2


15 (IEC Def Time)

3

Operate delay time

2000 ms

Page 4 of 4

ANNEXURE 3: LV Motor Protection Settings

LV Motor Thermal Overload Relay Settings Sl.No

Motor Capacity in kW

pf

eff

FLA

OLR

Range

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: eff

efficiency

pf

Power Factor

FLA Full Load Amps OLR Over Load Relay CT Current Transformer

Setting CT Ratio

Note 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

Earth Leakage Relay Settings Sl.No

Motor Capacity Protection Make in kW

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

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

Amps X 100 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

500

500 ±

300

Relay1 - P OC1

100

ABB REF 542plus CT Ratio 800:5 Long Time Inverse Pickup = 0.86 (0.05 - 40 xCT Sec) Time Dial = 0.05 3x = 3 s, 5x = 1.5 s, 8x = 0.857 s

50

300

CB9

6 kV SWITHGEAR1

CB14 ±

R

Relay2

100

Cable8 1-3/C 240

50

30

30

T2 3 MVA

10

10

5

5

Cable8 - P

3

3

1 - 3/C 240 mm² Copper XLPE Tc = 90C Plotted - 1 x 3/C 240 mm² 1

1

.5

.5

Relay2 - P OC1

.3

.3

ABB REF 615 CT Ratio 350:5 IEC - Extremely Inverse Pickup = 0.9 (0.3 - 5 xCT Sec) Time Dial = 0.65 3x = 6.5 s, 5x = 2.17 s, 8x = 0.825 s Inst = 13 (0.5 - 35 xCT Sec) Time Delay = 0.04 s

.1

.05

T2 3 MVA (Secondary) 7.83 %Z Delta-Wye Solid Grd .1

T2 Inrush

.05 Relay1 - 3P

.03

.03

Relay2 - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

3K

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.

Date: SN: Rev: Fault:

10K

ETAP Star 12.0.0C

Incomer - OG Project: Location: Contract: Engineer: Filename:

5K

06-14-2013 ABBGLOBAL Base Phase

Seconds

Seconds

Relay1

R

Amps 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

500

500 ±

Relay1

R

300

300

CB9

6 kV SWITHGEAR1

CB14 ±

R

100

10

50

30

T2 3 MVA

10

5

5

3

3

1

1

.5

.5

Relay2 - G OC1

.3

.3

ABB REF 615 CT Ratio 350:5 IEC - Normal Inverse Pickup = 10 (1 - 100 xCT Sec) Time Dial = 0.05 3x = 0.315 s, 5x = 0.214 s, 8x = 0.165 s Inst = 80 (5 - 400 xCT Sec) Time Delay = 0.04 s

.1

.05

.1

.05

.03

.03

Relay1 - LG Relay2 G - LG

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

3K



10K

ETAP Star 12.0.0C

Incomer - OG Project: Location: Contract: Engineer: Filename:

5K

06-14-2013 ABBGLOBAL Base Ground

Seconds

Seconds

1-3/C 240

ABB REF 542plus CT Ratio 800:5 Normal Inverse Pickup = 0.1 (0.05 - 40 xCT Sec) Time Dial = 0.08 3x = 0.504 s, 5x = 0.342 s, 8x = 0.264 s

30

100

Cable8

Relay1 - N OC1

50

Relay2

Amps X 10 Grid Bus (Nom. kV=150, Plot Ref. kV=150) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

01MBA10GT001 46/46/6.5 MVA

500

500

300

300 CB2

±

R

Relay10

Bus4

01MBA10GT001

01MBA10 37.64 MW

46 MVA (Secondary) 11.834 %Z Wye Solid Grd-Delta-Wye Resistor Grd Curve Shift = 1

100

Cable25

100

2-3/C 240

±

R

50

Relay1

50

CB9

6 kV SWITHGEAR1

30

30

10

10

5

2 - 3/C 240 mm² Copper XLPE Tc = 90C Plotted - 2 x 3/C 240 mm²

3

3

1

1

.5

.5

Relay1 - P OC1

.3

.3


.1

.05

.1

01MBA10GT001 Inrush

.05

.03

.03

Relay1 - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

3K



10K

ETAP Star 12.0.0C

GSUT Damage Curve Project: Location: Contract: Engineer: Filename:

5K


Seconds

Seconds

Cable25 - P 5

Amps Bus4 (Nom. kV=6, Plot Ref. kV=6) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

01MBA10GT001 46/46/6.5 MVA

500

500

300

300 CB2

±

R

Relay10

Bus4

01MBA10 37.64 MW Cable25

Relay10 - G - 51 OC1

100

100

2-3/C 240

±

50

30

Relay1

50

CB9

6 kV SWITHGEAR1

30

10

10

5

5

3

3

1

1

.5

.5

.3

.3

Relay1 - N OC1 ABB REF 542plus CT Ratio 800:5 Normal Inverse Pickup = 0.1 (0.05 - 40 xCT Sec) Time Dial = 0.08 3x = 0.504 s, 5x = 0.342 s, 8x = 0.264 s

.1

.05

.03

.1

.05

.03

Relay1 - -LG Relay10 G - LG

.01

.01 .5

1

3

5

10

30

50

100

300

500

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

1K

3K



10K

ETAP Star 12.0.0C

GSUT Damage Curve Project: Location: Contract: Engineer: Filename:

5K


Seconds

Seconds

R

ABB REF 610 CT Ratio 800:5 IEC - Normal Inverse Pickup = 10 (1 - 100 xCT Sec) Time Dial = 0.1 3x = 0.63 s, 5x = 0.428 s, 8x = 0.33 s

CB11 Open

Relay6

±

I>

Cable4 1-3/C 150

Bus8

Cranking Motor 1 450 kW

CB11 Open

Relay6

±

I>

Cable4 1-3/C 150

Bus8

Cranking Motor 1 450 kW


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K 1K

1K

Relay5 - P OC1

500

Relay5

ABB - New REM 615 CT Ratio 200:1 IEEE - Long Time Inverse Pickup = 0.7 (0.1 - 5 xCT Sec) Time Dial = 2.2 3x = 8.92 s, 5x = 6.19 s, 8x = 4.86 s Inst = 5 (0.1 - 40 xCT Sec) Time Delay = 0.04 s

300

100

50

500

CB23

300 ±

I>

Cable18

100

1-3/C 120 50

Bus26

30

30

Fuel Gas Compressor 2-Hot 10

10

5

5

Fuel Gas Compressor 2 1100 kW

3

3

1

1

.5

.5

.3

.3

Fuel Gas Compressor 2-80% 1100 KW

Fuel Gas Compressor 2-100%

.1

.1

1100 KW

Cable18 1 - 3/C 120 mm² Copper XLPE Tc = 90C

.05 .03

.05 .03

Relay5 - 3P

.01 .5

1

3

5

10

30

50

100

300

500

1K

Amps X 100 6 kV SWITHGEAR2 (Nom. kV=6, Plot Ref. kV=6) ABB Global Project: Location: Contract: Engineer: Filename:

Fuel Gas Comp

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.OTI



3K

5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

Stall = 12 sec


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K 1K

1K

500

500

CB23 Relay5

300

300 ±

I>

Cable18

100

100

1-3/C 120 50

50

Bus26

30

10

10

5

5


3

3

1

1

.5

.5

Relay5 - N OC1

.3

.3

ABB - New REM 615 CT Ratio 200:1 Normal Inverse Pickup = 0.075 (0.05 - 5 xCT Sec) Time Dial = 0.05 3x = 0.315 s, 5x = 0.214 s, 8x = 0.165 s Inst = 0.75 (0.05 - 40 xCT Sec) Time Delay = 0.04 s

.1

.05

.1

.05

.03

.03 Relay5 - LG

.01 .5

1

3

5

10

30

50

100

300

500

1K

Amps 6 kV SWITHGEAR2 (Nom. kV=6, Plot Ref. kV=6) ABB Global Project: Location: Contract: Engineer: Filename:

Fuel Gas Comp




3K

5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

30


1

3

5

10

1K

30

50

100

300

500

1K

3K

5K

Relay3 - P OC1

500

100

50

500

CB12

ABB - New REM 615 CT Ratio 100:1 Extremely Inverse Pickup = 0.45 (0.05 - 40 xCT Sec) Time Dial = 1 3x = 10 s, 5x = 3.33 s, 8x = 1.27 s Inst = 3 (0.1 - 40 xCT Sec) Time Delay = 0.04 s

300

10K 1K

Relay3

300

±

I>

Cable7 1-3/C 120

100

Bus12

50

30

30

HRSG Feed Pump1

10

355 kW

5

5

3

3

HRSG Feed Pump1-Hot Stall = 16 sec 1

1

HRSG Feed Pump1-85% 355 KW

.5

.5

.3

.3

Cable7 1 - 3/C 120 mm² Copper XLPE Tc = 90C

.1

.1

.05

.05

.03

.03

HRSG Feed Pump1-100% 355 KW

Relay3 - 3P

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

.01 10K

Amps X 10 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6)ETAP Star 7.5.0C ABB Global Project: Location: Contract: Engineer: Filename:

HRSG Feed Pump




Seconds

Seconds

10


1

3

5

10

30

50

100

300

500

1K

3K

5K

1K

500

10K 1K

500

CB12 Relay3

300

300

±

I>

Cable7 1-3/C 120

100

100

Bus12

50

50

30

30

HRSG Feed Pump1

10

355 kW

5

5

3

3

Relay3 - N OC1 ABB - New REM 615 CT Ratio 100:1 Normal Inverse Pickup = 0.05 (0.05 - 5 xCT Sec) Time Dial = 0.05 3x = 0.315 s, 5x = 0.214 s, 8x = 0.165 s Inst = 0.45 (0.05 - 40 xCT Sec) Time Delay = 0.04 s

1

.5 .3

1

.5 .3

.1

.1

.05

.05

.03

.03 Relay3 - LG

.01 .5

1

3

5

10

30

50

100

300

500

1K

Amps 6 kV SWITHGEAR1 (Nom. kV=6, Plot Ref. kV=6) ABB Global Project: Location: Contract: Engineer: Filename:

HRSG Feed Pump




3K

5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

10

CB10 Relay4 ±

I>

Cable1 1-3/C 120

Bus5

Main Sea Water Pump1 355 kW

CB10 Relay4 ±

I>

Cable1 1-3/C 120

Bus5

Main Sea Water Pump1 355 kW

6 kV SWITHGEAR1

CB14 ±

Relay2

R

Cable8 1-3/C 240

T2 3 MVA

±

R

Relay9

Amps X 100 LOAD CENTRE 1 (Nom. kV=0.4, Plot Ref. kV=0.4) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

Relay9 - G OC1

500

300

±

ABB REF 615 CT Ratio 5000:5 IEC - Normal Inverse Pickup = 10 (1 - 100 xCT Sec) Time Dial = 0.26 3x = 1.64 s, 5x = 1.11 s, 8x = 0.857 s

100

500

6 kV SWITHGEAR1

CB14

300

Relay2

R

Cable8 1-3/C 240

T2 3 MVA

100

±

R

Relay9

50

30

30

10

10

5

5

3

3

1

1

.5

Relay2 - G OC1

.5

.3

ABB REF 615 CT Ratio 350:5 IEC - Normal Inverse Pickup = 10 (1 - 100 xCT Sec) Time Dial = 0.05 3x = 0.315 s, 5x = 0.214 s, 8x = 0.165 s Inst = 80 (5 - 400 xCT Sec) Time Delay = 0.04 s

.3

.1

.05

.1

.05

.03

.03

Relay2 - G - LG

Relay9 - G - LG

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

Amps X 100 LOAD CENTRE 1 (Nom. kV=0.4, Plot Ref. kV=0.4) ETAP Star 12.0.0C

ABB Global Project: Location: Contract: Engineer: Filename:

3 MVA Trafo

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KDL



Seconds

Seconds

50

Amps X 100 Bus26 (Nom. kV=6, Plot Ref. kV=6) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

Relay5 - P OC1

500

Relay14 ±

300

100

500

R

ABB - New REM 615 CT Ratio 200:1 IEEE - Long Time Inverse Pickup = 0.7 (0.1 - 5 xCT Sec) Time Dial = 2.2 3x = 8.92 s, 5x = 6.19 s, 8x = 4.86 s Inst = 5 (0.1 - 40 xCT Sec) Time Delay = 0.04 s

CB41

Open

300 CB23 Relay5 ±

I>

Cable18

100

1-3/C 120

Bus26

50

50

30

30


10

Relay14 - P OC1

5


3

1

5

Fuel Gas Compressor 2-Hot

3

1

.5

.5

Fuel Gas Compressor 2-80% .3

.3

Fuel Gas Compressor 2-100% .1

.1

.05

.05

.03

.03

Relay14- -3P Relay5 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

Meghnaghat Project: Location: Contract: Engineer: Filename:

3K

Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.


10K

ETAP Star 12.0.0C

Gas Compressor Starting

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA

5K


Seconds

Seconds

10

Amps X 100 Existing SWGR (Nom. kV=6, Plot Ref. kV=6) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K Relay16 ±

Relay16 - P OC1

500

I>

Siemens 7SJ551 CT Ratio 2000:5 Inst = 1.15 (1 - 10 xCT Sec) Time Delay = 0.8 s

300

500

Existing SWGR

300

Relay15 ±

I>

Cable27 2-3/C 240

100

100 Relay14 ±

R

50

CB41

50

Open

6 kV SWITHGEAR1

30

30

Relay15 - P Siemens 7SJ45 CT Ratio 600:5 IEC - Very Inverse Pickup = 1.15 (0.5 - 4 xCT Sec) Time Dial = 0.5 3x = 3.38 s, 5x = 1.69 s, 8x = 0.964 s Inst = 3 (2 - 20 xCT Sec) Time Delay = 0.4 s

5

3

10

5

3

1

1

.5

.5

Relay14 - P OC1

.3

.3

ABB REF 542plus CT Ratio 800:5 Long Time Inverse Pickup = 0.86 (0.05 - 40 xCT Sec) Time Dial = 0.05 3x = 3 s, 5x = 1.5 s, 8x = 0.857 s Inst = 2.25 (0.05 - 40 xCT Sec) Time Delay = 0.4 s

.1

.05

.1

.05

.03

.03

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

Meghnaghat Project: Location: Contract: Engineer: Filename:

3K

Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KDL LV.


10K

ETAP Star 12.0.0C

Existing switchgear Coord

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA

5K


Seconds

Seconds

10

Amps X 100 GTG - 1 MCC MAIN (Nom. kV=0.4, Plot Ref. kV=0.4) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

1K

10K 1K

500

500 LOAD CENTRE 1

300

CB29

ABB SACE PR121 Frame = 1200 Plug = 800 Amps LT Pickup = 1 (800 Amps) LT Band = 12 ST Pickup = 5 (4000 Amps) ST Band = 0.3 (I^x)t = OUT

100

50

Cable2

100

2-4/C 300

50

CB53 GTG - 1 MCC MAIN

30

30

10

10

5

5

3

3

CB53 ABB SACE PR112 Sensor = 400 LT Pickup = 1 (400 Amps) LT Band = 12 ST Pickup = 6 (2400 Amps) ST Band = 0.1 (I^x)t = OUT Inst. Pickup = 15 (6000 Amps)

1

.5 .3

1

.5 .3

Cable2

.1

.1

.05

.05

.03

.03

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

Amps X 100 GTG - 1 MCC MAIN (Nom. kV=0.4, Plot Ref. kV=0.4) ABB Global Project: Location: Contract: Engineer: Filename:

LC - GT MCC




5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

300

CB29


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

500

500 LOAD CENTRE 1

CB34 300

300

ABB SACE PR121 Frame = 2000 Plug = 2000 Amps LT Pickup = 1 (2000 Amps) LT Band = 12 ST Pickup = 4 (8000 Amps) ST Band = 0.4 (I^x)t = OUT

100

CB34

Cable11 3-4/C 300

100

50

50 CB44

30

30 Utility MCC1

10

10

5

5

CB44 3

3

ABB SACE PR121 Frame = 2000 Plug = 2000 Amps LT Pickup = 0.75 (1500 Amps) LT Band = 12 ST Pickup = 3 (6000 Amps) ST Band = 0.3 (I^x)t = OUT

1

1

Cable11 - P

.5

.5

.3

.3

.1

.1

CB42 ABB SACE PR221 (T5) Sensor = 400 LT Pickup = 1 (400 Amps) LT Band = 12s ST Pickup = 5.5 (2200 Amps) ST Band = 0.25s (I^x)t = IN Override = 5000 Amps

.05 .03

.01 .5

1

3

5

10

.05 CB34 - 3P .03

CB44 - 3P .01 30

50

100

300

500

1K

3K

5K

10K



LC - Utility MCC ACDB

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA Selvakumar S C:\0 Projects\KDL\Relay Coordination\rc\KD



Seconds

Seconds

CB42


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K 1K

1K

500

500

Relay9 ±

R

300

300

CB16 100

100

LOAD CENTRE 1 50

50

30

30

CB34

CB34 ABB SACE PR121 Frame = 2000 Plug = 2000 Amps LT Pickup = 1 (2000 Amps) LT Band = 12 ST Pickup = 4 (8000 Amps) ST Band = 0.4 (I^x)t = OUT

5

10

5

3

3

1

1

.5

.5

Relay9 - P OC1

.3

.3

ABB REF 615 CT Ratio 5000:5 IEC - Extremely Inverse Pickup = 0.9 (0.3 - 5 xCT Sec) Time Dial = 0.68 3x = 6.8 s, 5x = 2.27 s, 8x = 0.863 s

.1

.05

.1 Relay9 - 3P .05 CB34 - 3P

.03

.03

CB16 - 3P

CB16 .01 .5

1

3

5

10

30

50

100

300

500

1K

Amps X 100 LOAD CENTRE 1 (Nom. kV=0.4, Plot Ref. kV=0.4) ABB Global Project: Location: Contract: Engineer: Filename:

LC IC & OG




3K

5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

10


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

500

500

CB33

300

300

100

100

Cable12

CEP-Hot

50

50

2-3/C 240

Stall = 12 sec 30

30

CEP-80%

Bus14

10

10

5

5

CEP 200 kW

3

3

CEP-100%

1

1

200 KW .5

.5

Cable12 - P

.3

.3

CB33 ABB SACE PR121 Frame = 800 Plug = 800 Amps LT Pickup = 0.5 (400 Amps) LT Band = 12 Inst. Pickup = 4 (3200 Amps)

.1

.05

.1

.05

.03

.03 CB33 - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K



CEP.

120 MW Combine Cycle GT Power CILEGON BANTEN INDONESIA Selvakumar S C:\0 Projects\KDL\Relay Coordination



Seconds

Seconds

200 KW


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

500

500

CB33

300

300

100

100

Cable12 50

50

2-3/C 240

30

30

10

10

5

5

CEP 200 kW

3

3

CB33 ABB SACE PR121 Frame = 800 Plug = 800 Amps Ground Pickup = 0.2 (160 Amps) Ground Band = 0.1 (I^x)t = OUT

1

.5

1

.5

.3

.3

.1

.1

.05

.05

.03

.03 CB33 - LG

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K



CEP.




Seconds

Seconds

Bus14

Amps X 100 Utility MCC1 (Nom. kV=0.4, Plot Ref. kV=0.4) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

1K

Relay7 - P OC1

500

Utility MCC1

100

50

500

CB42

AREVA P111 CT Ratio 400:5 IEC - Long Time Inverse Pickup = 1 (0.1 - 25 xCT Sec) Time Dial = 0.45 3x = 27 s, 5x = 13.5 s, 8x = 7.71 s Inst = 5 (0.5 - 40 xCT Sec) Time Delay = 0.2 s

300

10K 1K

300 Cable31 3-1/C 120

100

50 ±

Relay7

I>

30

30

ACDB

10

10

5

5

CB42 3

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

1

.5 .3

ABB T3 Size = 150 Amps Thermal Trip = Fixed Magnetic Trip = Fixed

.1

1

.5 .3

Cable31

CB43

3

.1

.05

.05

.03

.03

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

Amps X 100 Utility MCC1 (Nom. kV=0.4, Plot Ref. kV=0.4) ABB Global Project: Location: Contract: Engineer: Filename:

Utility MCC - ACDB




5K

.01 10K

ETAP Star 7.5.0C

Seconds

Seconds

CB43

Amps X 100 STG MCC (Nom. kV=0.4, Plot Ref. kV=0.4) .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

CB50 500

500


300

Essential MCC

300 CB50

100

100

Cable42 1-4/C 120

50

50 CB20 STG MCC

30

30

CB28

10

10

ABB SACE PR221 (T4) Sensor = 250 LT Pickup = 1 (250 Amps) LT Band = 12s ST Pickup = 7.5 (1875 Amps) ST Band = 0.1s (I^x)t = IN Override = 3000 Amps

5

3

5

3

1

1

.5

.5

.3

.3

Cable42 - P CB28 ABB T3 Size = 125 Amps Thermal Trip = Fixed Magnetic Trip = Fixed

.1

.05

.1

.05

.03

.03

CB50 - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

3K



10K

ETAP Star 12.0.0C

Ess MCC - STG MCC Project: Location: Contract: Engineer: Filename:

5K


Seconds

Seconds

CB20


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K

LOAD CENTRE 1

500

500 LOAD CENTRE 1

300

300 CB31

Cable5 2-4/C 300

100

100 CB51 Essential MCC

50

50

30

30

Cable5 - P 2 - 4/C 300 mm² Copper XLPE Tc = 90C Plotted - 2 x 4/C 300 mm²

10

5

Test PR121 New Frame = 1000 Plug = 1000 Amps LT Pickup = 1 (1000 Amps) LT Band = 36 ST Pickup = 6 (6000 Amps) ST Band = 0.4 (I^x)t = OUT

3

3

1

1

.5

.5

.3

.3

CB51

.1

.1


.05

.03

.05

.03

CB51CB31 - 3P - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

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

3K



10K

ETAP Star 12.0.0C

LC - Essential MCC Project: Location: Contract: Engineer: Filename:

5K


Seconds

Seconds

CB31 5

10


1

3

5

10

30

50

100

300

500

1K

3K

5K

10K

1K

1K LOAD CENTRE 1

CB49

500

500

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

300

CB32

300

Cable10 1-4/C 120

100

100 CB49 HRSG MCC 1

50

50

30

30

CB32

10


5 3

5 3

1

1

.5

.5

.3

.3

.1

.1

.05

.05

CB32 - 3P

.03

.03 CB49 - 3P

.01

.01 .5

1

3

5

10

30

50

100

300

500

1K

3K

5K

10K



HRSG




Seconds

Seconds

10

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: Sl.No

Parameter

Values

Unit

Set Value

1

Delta Voltage

0.02 – 0.4

Pu

0.05

2

Delta Phase

5 – 50

Deg

10

3

Time

0.2 ‐ 1000

s

100

Sl.No

Parameter

Values

Unit

Set Value

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

Under Voltage

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

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