RELAY SETTING CALCULATION
DOCUMENT:
RIC S/S#2 380/115/33KV BSP
STATION:
[
Multiples
1.8.1
Applicable for
-
33kV CAPACITOR BANK
Relay Type
=
ALSTOM P142
PT Ratio
Overvoltage setting- Alarm
Time settings
fault
current
P142 91ND6M0500J
=
33KV/SQRT(3)/115V/SQRT(3))
=
105% of nominal voltage
=
(1.05*66.4)
=
5 Sec
VOLT PROTECTION GROUP 1: OVER VOLTAGE SETTING
MENU TEXT
SETTING
V> Measur't Mode
Phase to Neutral
V> Operate Mode
Any Phase
V> 1 Function
DT
V> 1 Voltage Set
70.0 V
V> 1 Time Delay
5 Sec
V> 1 TMS
1
V> 2 Status
Disabled
V> 2 Voltage Set
N/A
V> 2 Time Delay
N/A
30
A
Rev. No.:
of
33KV CAPACITOR BANK OVER VOLTAGE STAGE-1 PROTECTION RELAY SETTING (59-1)
Relay Ordering Data
EE-269253
Doc. No.:
70.0 V
0.02
−
1
]
RELAY SETTING CALCULATION
DOCUMENT:
RIC S/S#2 380/115/33KV BSP
STATION:
[
Multiples
1.8.2
-
fault
current
33kV CAPACITOR BANK
Relay Type
=
ALSTOM P142
Relay Ordering Data
=
P142 91ND6M0500J
PT Ratio
=
33KV/SQRT(3)/115V/SQRT(3))
Circuit Breaker
=
B409, B422, B434
Overvoltage setting- Alarm
Time settings
=
110% of nominal voltage
=
(1.1*66.4)
=
3 Sec
VOLT PROTECTION GROUP 1: OVER VOLTAGE SETTING
MENU TEXT
SETTING
V> Measur't Mode
Phase to Neutral
V> Operate Mode
Any Phase
V> 1 Function
Disabled
V> 1 Voltage Set
N/A
V> 1 Time Delay
N/A
V> 1 TMS
N/A
V> 2 Status
Enabled
V> 2 Voltage Set
73 V
V> 2 Time Delay
3.00S
31
A
Rev. No.:
of
33KV CAPACITOR BANK OVER VOLTAGE STAGE-1 PROTECTION RELAY SETTING (59-2)
Applicable for
EE-269253
Doc. No.:
73.0 V
0.02
−
1
]
RELAY SETTING CALCULATION
DOCUMENT:
RIC S/S#2 380/115/33KV BSP
STATION:
[
Multiples
1.8.3
-
fault
current
33kV CAPACITOR BANK
Relay Type
=
ALSTOM P142
Relay Ordering Data
=
P142 91ND6M0500J
PT Ratio
=
33KV/SQRT(3)/115V/SQRT(3))
Circuit Breaker
=
B409, B422, B434
Undervoltage setting- Trip
Time settings
=
30% of nominal voltage
=
(0.3*66.4)
=
5 Sec
VOLT PROTECTION GROUP 1: OVER VOLTAGE SETTING
MENU TEXT
SETTING
V< Measur't Mode
Phase to Neutral
V< Operate Mode
Any Phase
V< 1 Function
Disabled
V< 1 Voltage Set
N/A
V< 1 Time Delay
N/A
V< 1 TMS
N/A
V< 1 Poledead Inh
Disabled
V< 2 Status
Enabled
V< 2 Voltage Set
20 V
V< 2 Time Delay
5 Sec
V< 2 Poledead Inh
Enabled
32
A
Rev. No.:
of
33KV CAPACITOR BANK UNDER VOLTAGE PROTECTION RELAY SETTING (27-2/27)
Applicable for
EE-269253
Doc. No.:
20.0 V
0.02
−
1
]
RELAY SETTING CALCULATION
DOCUMENT:
RIC S/S#2 380/115/33KV BSP
STATION:
[
Multiples
1.8.4
-
fault
33kV CAPACITOR BANK
Relay Type
=
ALSTOM P142
Relay Ordering Data
=
P142 316D6M0440J
CT Ratio
=
5/5 A
Circuit Breaker
=
B409, B422, B434
As Per Vendor Recommendation
ALARM STAGE CURRENT SETTING
=
0.7 A
ALARM STAGE TIME SETTING
=
5 Sec
TRIP STAGE CURRENT SETTING
=
1.0 A
TRIP STAGE TIME SETTING
=
0.1 Sec
GROUP 1: OVER CURRENT SETTING
MENU TEXT
SETTING
I>1 Input
Measured
I>1 Function
DT
I>1 Direction
Non-Dir
I>1 Current Set
0.7A
I>1 Time Delay
5 Sec
I>1 tRESET
0 Sec
I>2 Function
DT
I>2 Direction
Non-Dir
I>2 Current Set
1.0A
I>2 Time Delay
0.1 Sec
I>2 tRESET
0 Sec
I>3 Status
Disabled
I>4 Status
Disabled
33
A
Rev. No.:
of
current
0.02
33KV CAPACITOR BANK NEUTRAL UNBALANCE OC PROTECTION RELAY SETTING (46-1 & 46-2)
Applicable for
EE-269253
Doc. No.:
−
1
]
DOCUMENT:
STATION:
RELAY SETTING CALCULATION
RIC S/S#2 380/115/33KV BSP
[
Multiples
1.8.5
EE-269253
Doc. No.:
A
Rev. No.:
of
fault
current
0.02
−
1
]
33KV CAPACITOR BANK INST PH OC PROTECTION RELAY SETTING (50PA, 50PB & 50PC)
Applicable for
-
33kV CAPACITOR BANK
Relay Type
=
ABB - RXIG22
Relay Ordering Data
=
RK 411 008-DG
Circuit Breaker
=
B409, B422, B434
System voltage:
=
33.0 KV
CT Ratio
=
1200-800-600/1A
Adopted Tap
600 /1 A
Maximum peak inrush current
=
1180.0A
(AS PER Manufacture Data)
Maximum peak outrush current
=
1210.0A
(AS PER Manufacture Data)
Relay setting
=
1.2 X outrush Current / (SQRT(2) X CTR)
=1.2 x 1210/( sqrt(2) x600)
Relay setting
=
1.71 A
=
1.80 A
34
DOCUMENT:
STATION:
RELAY SETTING CALCULATION
RIC S/S#2 380/115/33KV BSP
[
Multiples
EE-269253
Doc. No.:
A
Rev. No.:
of
fault
current
0.02
−
1
]
1.8.6 33KV CAPACITOR BANK INST GROUND OC PROTECTION RELAY SETTING (50PN)
Applicable for
-
33kV CAPACITOR BANK
Relay Type
=
ABB - RXIG22
Relay Ordering Data
=
RK 411 008-DG
Circuit Breaker
=
B409, B422, B434
System voltage:
=
33.0 KV
CT Ratio
=
1200-800-600/1A
Adopted Tap
600 /1 A
Maximum peak inresh current
1180A @ 250 HZ
(AS PER Manufacture Data)
Maximum peak outresh current
1210A @ 278 HZ
(AS PER Manufacture Data)
RELAY SETTING
=
1.00A
35
DOCUMENT:
STATION:
RELAY SETTING CALCULATION
Doc. No.:
EE-269253
RIC S/S#2 380/115/33KV BSP
Rev. No.:
A
1.8.7 33KV CAPCAITOR BANK NON DIRECTIONAL O/C PROTECTION
Applicable for
-
33kV CAPACITOR BANK
Relay Type
=
ALSTOM - P142
Relay Ordering Data
=
P142 91ND6M0500J
Circuit Breaker
=
B409, B422, B434
System voltage:
=
33.0 KV
CT Ratio
=
1200-800-600/1A
Adopted Tap
600 /1 A
Capacitor rating
=
10.0 MVar
Capacitor current
=
= 10x10^3/(sqrt(3) x 33)
Relay setting
=
(1.35 x capacitor current/CT ratio)
=
(1.35 x 175/600)
Relay IDMTL curve
=
VERY INVERSE
Fault current considered
=
5000A
Assumed
Operating time required
=
0.5 s
Assumed
Fault current in multiples of relay setting
=
(5000/(0.39X600)
21.37 times
Relay operating
time at TMS 1
=
(13.5/21.37-1)
0.66 S
Required relay operating time
=
0.50 s Assumed
Required TMS setting
=
(0.5/0.66)
TMS SETTING
=
0.76
175.00 A
0.39 In
0.76
GROUP 1: OVER CURRENT SETTING
MENU TEXT
SETTING
I>1 Function
IEC v Inverse
I>1 Direction
Non-Directional
I>1 Current Set
0.39 A
I>1 TMS
0.76
I>1 tRESET
0 Sec
I>2 Function
Disabled
I>3 Status
Disabled
I>4 Status
Disabled
[
Multiples
36
of
fault
current
0.02
−
1
]
DOCUMENT:
STATION:
RELAY SETTING CALCULATION
Doc. No.:
EE-269253
RIC S/S#2 380/115/33KV BSP
Rev. No.:
A
[
Multiples
of
fault
current
0.02
−
1
]
1.8.8 33KV CAPCAITOR BANK NON DIRECTIONAL E/F PROTECTION
Applicable for
-
33kV CAPACITOR BANK
Relay Type
=
ALSTOM - P142
Relay Ordering Data
=
P142 91ND6M0500J
Circuit Breaker
=
B409, B422, B434
System voltage:
=
33.0 KV
CT Ratio
=
1200-800-600/1A
Adopted Tap
600 /1 A
Capacitor rating
=
10000.0 KVar
Capacitor current
=
Relay setting
=
20% of CT current
=
0.2
Relay IDMTL curve
=
Normal Inverse
Fault current considered
=
5000 A
Assumed
Operating time required
=
0.25 s
Assumed
Fault current in multiples of relay setting
=
(5000/(0.2X600)
41.67 times
Relay operating
=
(0.14/41.67^0.02-1)
1.81 S
Required relay operating time
=
0.25 s
Required TMS setting
=
(0.25/1.81)
TMS SETTING
=
0.14
10000/(sqrt(3) x 33)
GROUP 1: EARTH FAULT SETTING
MENU TEXT
SETTING
I>1 Function
IEC S Inverse
I>1 Direction
Non-Directional
I>1 Current Set
0.20 A
I>1 TMS
0.14
I>1 tRESET
0 Sec
I>2 Function
Disabled
I>3 Status
Disabled
I>4 Status
Disabled
37
175.00 A
0.2 A
0.14
RELAY SETTING CALCULATION
DOCUMENT:
Doc. No.: EE-269253
RIC S/S#2 380/115/33KV BSP
STATION:
A
Rev. No.:
1.8.9 33KV CAPACITOR BANK AUTOMATIC CAPACITOR CONTROL (ACCS) SETTING FOR 3 TRANSFORMERS SYSETM
Relay Type
( MVAR Reading Should be from 33KV)
REC670 (CU-ACCS)
Relay Ordering
Circuit
Breaker
1MRK 002 814-AC
B409, B422, B434
CASE 1
CONDITION
BC1 OPEN
BC2 OPEN
SET VALUES FOR CLOSING
Mvar
SET VALUES FOR OPENING
TIME
Mvar
TIME
QC1
CLOSE
11
Mvar-1
5 Min.
t1
OPEN
1
Mvar-2
5 Min.
t2
QC2
CLOSE
11
Mvar-1
5 Min.
t1
OPEN
1
Mvar-2
5 Min.
t2
QC3
CLOSE
11
Mvar-1
5 Min.
t1
OPEN
1
Mvar-2
5 Min.
t2
CASE 2
CONDITION
BC1 OPEN
BC2 CLOSED
SET VALUES FOR CLOSING
Mvar
SET VALUES FOR OPENING
TIME
Mvar
TIME
QC1
CLOSE
11
Mvar-1
5 Min.
t1
OPEN
1
Mvar-2
5 Min.
QC2
CLOSE
12
Mvar-3
5 Min.
t3
OPEN
2
Mvar-4
10 Min.
t2
t4
QC3
CLOSE
13
Mvar-5
10 Min.
t5
OPEN
3
Mvar-6
5 Min.
t6
CONDITION
BC1 CLOSED
BC2 OPEN
CASE 3
SET VALUES FOR OPENING
SET VALUES FOR CLOSING
Mvar
TIME
Mvar
TIME
QC1
CLOSE
12
Mvar-3
5 Min.
t3
OPEN
2
Mvar-4
10 Min.
t4
QC2
CLOSE
13
Mvar-5
10 Min.
t5
OPEN
3
Mvar-6
5 Min.
t6
QC3
CLOSE
11
Mvar-1
5 Min.
t1
OPEN
1
Mvar-2
5 Min.
t2
CONDITION
BC1 CLOSED
BC2 CLOSED
Volts
TIME
0-120 sec
104.0%
120Sec
t9
Volts
TIME
0-5 sec
98.0%
5Sec
t10
TIME
0-30 sec
30 Sec
t13
CASE 4- NOT APPLICABLE FOR 33 kV SYSTEM
T1,T2,T3 CLOSED
DISABLE CASE # 4
CASE 5
OVER VOLTAGE
SET VALUES FOR OPENING
V1
34.32 kV
OPEN
CASE 6
SET VALUES FOR CLOSING
UNDER VOLTAGE
V2
32.34 kV
OPEN
CASE 7
LEADING POWER FACTOR
SET VALUES FOR OPENING
pf
OPEN
0.95
PF
CASE 8
CONDITION
BC1 CLOSED
BC2 CLOSE
T3-OPEN
SET VALUES FOR CLOSING
Mvar
SET VALUES FOR OPENING
TIME
Mvar
TIME
QC1
CLOSE
12
Mvar-3
5 Min.
t3
OPEN
2
Mvar-4
10 Min.
t4
QC2
CLOSE
13
Mvar-5
10 Min.
t5
OPEN
3
Mvar-6
5 Min.
t6
DISCHARGE TIME FOR RECLOSING
SET VALUES FOR RECLOSING
11 Min.
t11
5-20 min
Time delay to close QCx after QTx closed
11 Min.
t12
5-20 min
Capacitor Discharging time
2 Sec.
t14
9,999 ms
t15
Time delay to implement settings changes
0 - 9999 ms
Time delay to avoid simultaneous closing of QCx
38