SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: TITLE: RELAY RELAY SETTI SETTING NG CALCU CALCULATI LATION ON AND COORDIN COORDINATIO ATION N FOR FOR GTG,STG GTG,STG & UAT. UAT. CLIENT CLIENT : RAJASTHA RAJASTHAN N RAJYA VIDYUT VIDYUT UTPADA UTPADAN N NIGAM LIMITE LIMITED D 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
Relay Details Relay Type Make Rated current
7UM62 SIEMENS 5A
GENERATOR DETAILS: Rated Active Power Rated Apparent Power Rated Voltage (UNmach) Rated Current (INmach) Power Factor Rated Frequency X"d (Sub Transient Reactance) X'd (Transient Reactance) Xd (Direct Axis Reactance) Neutral Grounding Transformer Primary Neutral Grounding Transformer Secondary NGT Secondary Reactor Value Neutral Grounding Transformer Capacity Negative Sequence Capability I2S I2^2t
= = = = = = = = = = = = = = =
123.7 145.5 11 7638.54 0.85 50 0.15 0.23 1.941 11000 220 0.424 25 0.08 8
= = =
11000 110 100
V V
CT Secondary CTR
= = =
8500 5 1700
A A
GENERATOR TRANSFORMER DETAILS: Rated Capacity HV Voltage Rating LV Voltage Rating % Impedance
= = = =
150 230000 11000 12.50
GENERATOR TRANSFORMER CT DETAILS: HV Side CT Primary HV Side CT Secondary HV Side Neutral CT Primary HV Side Neutral CT Secondary
= = = =
600 1 600 1
GENERATOR PT DETAILS: PT Primary (UN VT prim) PT Secondary PTR
GENERATOR CT DETAILS: CT Primary (IN CT prim)
NEUTRAL GROUNDING TRANSFORMER HV Side LV Side Neutral CT Primary Neutral CT Secondary Load Resistance Rprimary Full Load Current CT Secondary Current
MW MVA kV A lag
8.00 Sec.
%
For machines in Unit transformer connection the evaluation of the displacement voltage is sufficient. Displacement Voltage:
Page 1 of 25
MVA V V 0.125
V V A A A A A
95% STATOR EARTH FAULT PROTECTION (64G)
110.00 5.5 6.05 6
Hz P.U P.U P.U V V Ohms KVA %
11000X√�
V V V V
=
300 A
230 kV 11 kV
A A A A
= 11000 = 220 = 400 = 5 = 0.424 = 36.6 = 7638.54 = 7638.54x(5/8500) = 4.49
Max Open Delta Voltage = With 5% of setting = With 110% of margin setting = U0> =
11000 V
(11000/√3)
6351
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: TITLE: RELAY RELAY SETTI SETTING NG CALCU CALCULATI LATION ON AND COORDIN COORDINATIO ATION N FOR FOR GTG,STG GTG,STG & UAT. UAT. CLIENT CLIENT : RAJASTHA RAJASTHAN N RAJYA VIDYUT VIDYUT UTPADA UTPADAN N NIGAM LIMITE LIMITED D 123.7MW GAS TURBINE GENERATOR PROTECTIONS
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN RELAY TYPE : 7UM62
100-% STATOR EARTH FAULT PROTECTION WITH 20HZ VOLTAGE INJECTION (64G) THE FACTOR R SEF = ü2Transf x(üDivider /üMinCT)
for üTransf =üNeutral Transf
= (UNprim /√3)/(UNsec) = (11000/1.7 (11000/1.732)/( 32)/(220) 220) = 28.87
The transformation ratio of the miniature CT is 400/5A
üDivider = 5/2 = 2.5
üMinCT = 400/5 = 80 = (28.87 (28.87^2) ^2)x(2 x(2.5/ .5/80) 80) THE FACTOR R SEF = 27.000 If for the Trip stage R<< a generator-side fault resistance of 1000 is chosen A resistance of R<< SEF TRIP = (100 (1000/ 0/27 27)) = 37.04 = 40 If for the Alarm stage R< a generator-side fault resistance of 3000 is chosen A resistance of R< SEF ALARM = (300 (3000/ 0/27 27)) = 111.11 = 120 THE EARTH CURRENT STAGE, SEF I>> = 0.2*(UNGen/RL)*(1/üMin CT) = 0.2x((1100 0.2x((11000/√3)/ 0/√3)/36.6) 36.6)x((1/ x((1/400/5 400/5)) )) = 0.434 A
IMPEDANCE PROTECTION PROTECTION (2 1) Maximunm load current setting: Rated current of Generator Max current at 95% voltage
= 7638.54 = 8041
A A
As this relay should not pickup for overload,120% safty factor is considered IMP I> = 6
Generator Transformer back-up impedance protection setting: Gene Genera rato torr Trans ransfo form rmer er Impe Impeda danc nce e at 1100 11000V 0V base base Generator Transformer Impedance x 0.8 Secondary Secondary Impedance Impedance
Line back-up impedance protection setting: Line positive sequence impedance/Km Line Voltage Line Length
System Impedance on 22000V base Total Impedance
Total Secondary Secondary Impedance Impedance
A
= = = = = = ZONE Z1 =
(110 11000x1 00x110 1000 00x0 x0.1 .125 25)/ )/((150x 150x10 1000 0000 000) 0) 0.101 Ohms (0.101x0.8) 0.081 Ohms 0.081x(CTR/ 0.081x(CTR/VTR) VTR) 0.081x 0.081x(17 (1700/ 00/100 100)) 1.000 Ohms
= = = = = = = = = = = ZONE Z2 =
0.075 Ohms 230000 V 210.000 km (0.0 (0.075 75x2 x210 10)) 15.724 Ohms (Imp. On 220000V base)x (11000x11000)/(230000x230000) 0.036 Ohms (L (Line Imp. + Transformer Imp.)x 1.1 (0.036 (0.036+0.1 +0.101) 01)x1. x1.1 1 0.151 Ohms 0.151x(CTR/ 0.151x(CTR/VTR) VTR) 3.000 Ohms
FACTOR UE = 72.17
Page 2 of 25
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
LOSS OF EXCITATION (40) The reciprocal of secondary per unit synchronous direct reactance is,
1/Xdsec = (1/Xdmach)x(INmach/UNmach)x(UN VT prim/IN CT prim) = (1/1.941)x(7638.54/11000)x(11000/8500) = 0.46
CHAR 1 Muliplied by a safety factor of about 1.05, the setting value 1/Xdsec is,
= 0.490
CHAR 2 1/Xdsec in CHAR 2 is set to about 0.9 of CHAR 1
= 0.44
CHAR 3 is for dynsmic stability of the machine and is set between 1/Xd and 1/Xd'
1/Xd'sec = (1/Xd'mach)x(INmach/UNmach)x(UN VT prim/IN CT prim) = 3.907
CHAR 3 value1/xd CHAR. 3 situated approximately between the synchronous direct reactance xd and the transient reactance xd'. However, it should be greater than 1.
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46) pickup thershold
Pickup Setting I2> = (I2 max prim/IN machine)x(IN machine/IN CT prim)
max. perm.(I2 max prim /IN machine) in permanent operation in our machine
= 8.00
%
= (8)x(7638.54/8500) % I2 =
Negative Sequence Factor K,
Ksec
=
Kprimaryx(IN Machine/IN CT prim)2
Kprimary = 8 sec. = 8x(7638.54/8500) sec. FACTOR K = 7.20
Time for Cool Down,
tcooldown
=
Kprimary/(I2 perm/IN)2
= 1250
sec.
GEN .POLE SLIPPING PROTECTION (OR) OUT-OF-STEP PROTECTION(78) The power swing rectance of the machine must be considered, which is approximately the transient reactance
Zb=X'd Zb = (X'd)x(kV2/MVA)x(CTR/VTR) Per unit Impedance (pu)
Zb
= = = = = = =
kV2 /MVA 11^2/145.53 0.831 Ohms 0.831x (CTR/PTR) 14.200 Ohms 14.2x0.23 3 Ohms
Thus ZC is set to 85% of the transformer impedance XSC .
ZC = 0.85 x XSC XSC = XSC prim x (kV2/MVA) x (CTR/VTR) = = = = = = ZC = =
Page 3 of 25
kV2 /MVA 11^2/150 0.807 Ohms 0.807x (CTR/PTR) 13.800 Ohms 1.725 0.85x1.725 1.000 Ohms
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
Thus Za is decisive for the width of the power swing polygon
Za = 0.289 x Ztot Ztot = Zb + ZC = 4.000 Za = 1.00
Ohms
The covered system reactance should be 10,so
Zd = 10
Ohms
Zd-Zc = 9.00
Ohms
THERMAL OVERLOAD PROTECTION (49) K-FACTOR: The K-FACTOR refers to the secondary nominal current. The following applies for the conversion Imax prim
IN
CT prim
= 115% X Inmach = 1.15 X 7638.54 = 8784.32
A
= 8500
A
= Imax prim / IN CT prim
K-FACTOR
= 1.1
TIME CONSTANT ( τ): Set Default Value as Q ALARM (Θ ⁄ Θtrip):
= 600
Sec
Q ALARM (Θ ⁄ Θtrip) issues thermal warning prior to tripping & is given in % of the tripping temperature level. = 1/(K-FACTOR)2 = 1/(1.1)^2 = 90.0 %
I ALARM: This level is set in secondary amperes, and should be set equal to, or slightly less than, the permissible continuous current K-FACTOR IN sec. = IN sec = 5 A Kτ-FACTOR: Set Default Value as
= 1
I MAX THERM.:
= = = =
T EMERGENCY: Set Default Value as
3 X Nominal generator current 3 X Inmach X (IN CT Sec/IN CT Prim) 3 X 7638.54 X (5/8500) 13.48 A
= 100
Sec
TEMP. RISE I : ΘNsec = ΘNMach x (INprim/INmach)2 where,
ΘNsec = Machine temperature with nominal secondary current ΘNMach = Machine temperature with nominal machine current = 80 (Considered for Calculation) °C Inprim = Nominal primary current of the current transformers = 8500 A INMach = Nominal machine current A = 7638.54
= 80 X (8500/7638.54)^2 = 100.0 °C If the temperature input is used, the trip times change if the coolant temperature deviates from the internal reference temperature of 40 °C. The following formula can be used to calculate the trip time: (I/k.IN)2 + ((ΘK – 40 °C)/ (k 2 ⋅ ΘN)) - (Ipre/k ⋅ IN)2 t = τ . ln (I/k.IN)2 + ((ΘK – 40 °C)/ (k 2 ⋅ ΘN)) - 1 Therefore,
where,
ΘNsec
τ
k IN I Ipre ΘN ΘK
= = = = = = =
TIME CONSTANT K-FACTOR Nominal device current Actually flowing secondary current Previous load current Temperature with nominal current IN Coolant temperature input
The following trip times result for different ambient temperatures ΘK with a supposed load current of I = 1.5 IN Ipre = 0
Page 4 of 25
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
with ΘK = 40 °C:
t
= 600 x ln
(1.5/1.1)2 + ((40 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 0 (1.5/1.1)2 + ((40 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 1
= 463
with ΘK = 80 °C:
t
Sec
= 600 x ln
(1.5/1.1)2 + ((80 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 0 (1.5/1.1)2 + ((80 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 1
= 366
with ΘK = 0 °C:
t
Sec
= 600 x ln
(1.5/1.1)2 + ((0 °C – 40 °C)/ (1.1 2 x 100 °C)) - 0 (1.5/1.1)2 + ((0 °C – 40 °C)/ (1.1 2 x 100 °C)) - 1
= 637
Sec
GTG MAIN-1 RELAY PANEAL (7UM62-GR1) SI.NO
FUNCTION
SETTING RANGE
RECOMMENDED SETTING
DIFFERENTIAL PROTECTION (87G)
1
Differential Protection
OFF,ON,Block relay for trip commands
ON
2
I-DIFF>
0.05..2.00 I/InO
0.20
I/InO
3
T I-DIFF>
0.00..60.00 sec; ∞
0.00
sec
4
I-DIFF>>
0.5..12.0 I/InO; ∞
6.00
I/InO
5
T I-DIFF>>
0.00..60.00 sec; ∞
0.00
sec
6
SLOPE 1
0.10..0.50
0.25
7
BASE POINT 1
0.00..2.00 I/InO
0.00
8
SLOPE 2
0.25..0.95
0.50
9
BASE POINT 2
0.00..10.00 I/InO
2.50
I/InO
10
I-ADD ON STAB.
2.00..15.00 I/InO
4.00
I/InO
I/InO
95% STATOR EARTH FAULT PROTECTION (64G)
1
S/E/F PROT.
OFF,ON,Block relay for trip commands
ON
2
U0>
2.0..125.0 V
6
V
3
T S/E/F
0.00..60.00 sec; ∞
0
sec
100-% STATOR EARTH FAULT PROTECTION WITH 20HZ VOLTAGE INJECTION (64G)
1
100% SEF-PROTN.
OFF,ON,Block relay for trip commands
ON
2
R< SEF ALARM
20…700 Ohm
120
Ohm
3
R<< SEF TRIP
20…700 Ohm
40
Ohm
4
T SEF ALARM
0.00…60.00 sec; ∞
10.00
sec
5
T SEF TRIP
0.00…60.00 sec;∞
1.00
sec
6
SEF I>>
0.02…1.50A
0.43
A
7
U20MIN
0.3…15.0V
1.0V
V
8
I20MIN
5…40mA
10.00
mA
9
PHI ISEF
-60O...60O
0o
10
SEF Rps
0…700 Ohm
0
Ohm
11
RI-PARALLEL
20…700 Ohm;∞
∞
Ohm
1
ROTOR E/F
OFF,ON,Block relay for trip commands
ON
2
RE< WARN
3.0..30.0 kOhm
10.00
kOhm
3
RE<< TRIP
1.0..5.0 kOhm
2.00
kOhm
4
T-WARN-RE<
0.00..60.00 sec; ∞
10.00
sec
5
T-TRIP-RE<<
0.00..60.00 sec; ∞
0.50
sec
ROTOR EARTH FAULT PROTECTION (64R)
Page 5 of 25
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
REVERSE POWER PROTECTION (32)
1
REVERSE POWER
OFF,ON,Block relay for trip commands
ON
2
P> REVERSE
30.00..-0.50 %
-1.930
%
3
T-SV-OPEN
0.00..60.00 sec; ∞
2.00
sec
4
T-HOLD
0.00..60.00 sec; ∞
0.00
sec
GENERATOR INTERTURN FAULT PROTECTION (59N)
1
Interturn protn
OFF/ON/Block relay
ON
2
U Interturn V>
0.3 .. 130.0 V
5.00
V
3
T-U Interturn V>
0.00 .. 60.00 sec; ∞
0.50
sec
4
Reset ratio
50 .. 95 %
80.00
%
DEAD MACHINE PROTECTION (OR) INADVERTENT ENERGIZATION (50)
1
INADVERT. EN.
OFF,ON,Block relay for trip commands
ON
2
I STAGE
0.1..20.0 A; ∞
0.5
A
3
RELEASE U1<
10.0..125.0 V; 0
55
V
4
PICK UP T U1<
0.00..60.00 sec; ∞
5.00
sec
5
DROP OUT T U1<
0.00..60.00 sec; ∞
1.00
sec
ON
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46)
1
UNBLANCED LOAD
OFF,ON,Block relay for trip commands
2
I2>
3.0…30.0%
3
T WARN
0.00…60.00 sec; ∞
20
sec
2
FACTOR K
2.0…100.00 sec; ∞
7.2
sec
3
T COOL DOWN
0…50000 sec
1250.0
sec
4
I2>>
10…100%
60
%
5
T I2>>
0.00…60.00 sec; ∞
3.00
sec
1
UNDEREXCIT
OFF,ON,Block relay for trip commands
ON
2
T SHRT Uex<
0.00…60.00 sec; ∞
0.50
3
EXCIT.VOLT.
ON,OFF
OFF
4
Uexcit<
0.50…8.00V
2.00
V
5
Umin
10.0…125.0V
25.0
V
6
1/Xd CHAR.1
0.25…3.00
0.49
7
ANGLE 1
50…120O
80O
8
T CHAR. 1
0.00…60.00 sec; ∞
10.00
9
1/Xd CHAR.2
0.25…3.00
0.44
10
ANGLE 2
50…120O
90O
11
T CHAR. 2
0.00…60.00 sec; ∞
10.00
12
1/Xd CHAR.3
0.25…3.00
1.10
13
ANGLE 3
50…120O
90O
14
T CHAR. 3
0.00…60.00 sec; ∞
0.30
1
UNDERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U<
10.0..125.0 V
99.0
V
3
T U<
0.00..60.00 sec; ∞
3.00
sec
4
U<<
10.0..125.0 V
88.0
V
5
T U<<
0.00..60.00 sec; ∞
0.50
sec
6
U< DOUT RATIO
1.01..1.20
1.05
%
LOSS OF EXCITATION (40)
sec
sec
sec
sec
UNDERVOLTAGE PROTECTION (27)
Page 6 of 25
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
INVERSE TIME OVER CURRENT, WITH VOLTAGE CONTROL OR VOLTAGE RESTRAINT (51V)
1
O/C Ip
OFF,ON,Block relay for trip commands
ON
2
Ip
0.10..4.00 A
1.0
3
TIME DIAL: TD
0.50..15.00; ∞
0.50
4
IEC CURVE
Normal Inverse,Very Inverse,Extremely Inverse
Normal Inverse
5
U<
10.0..125.0 V
88.00
1
O/U FREQUENCY
OFF,ON,Block relay for trip commands
ON
2
f1 PICKUP (UNDER)
40.00..65.00 Hz
49.0
Hz
4
T f1
0.00..600.00 sec
0
sec
5
f2 PICKUP (UNDER)
40.00..65.00 Hz
47.5
Hz
7
T f2
0.00..600.00 sec
2.00
sec
9
f3 PICKUP (OVER)
40.00..65.00 Hz
51.0
Hz
10
T f3
0.00..600.00 sec
2.00
sec
9
f4 PICKUP (OVER)
40.00..65.00 Hz
52.5
Hz
10
T f4
0.00..600.00 sec
1.00
sec
11
THRESHOLD f4
Freq. prot. stage automatic,Freq. prot. stage overfreqency,Freq. prot. stage underfreqency
Freq. prot. stage automatic
12
Umin
10.0..125.0 V; 0
72.00
1
OVERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U>
30.0..170.0 V
116.0
3
T U>
0.00..60.00 sec; ∞
3.00
4
U>>
30.0..170.0 V
121.0
5
T U>>
0.00..60.00 sec; ∞
0.50
6
U> DOUT RATIO
0.90..0.99
0.95
7
VALUES U>
A
V
UNDER&OVER FREQUENCY (81)
V
OVERVOLTAGE PROTECTION (59)
V sec V sec
Voltage protection with UPhaseVoltage protection with UPhase,Voltage protection with Phase-Phase UPhase-earth.
OVERFLUXING PROTECTION (99)
U/f >
OFF,ON,Block relay for trip commands 1.00..1.20
1.10
3
T U/f >
0.00..60.00 sec; ∞
10
4
U/f >>
1.00..1.40
1.40
5
T U/f >>
0.00..60.00 sec; ∞
1
1
OVEREXC. PROT.
2
ON
sec
sec
IMPEDANCE PROTECTION (21)
IMP I>
OFF,ON,Block relay for trip commands 0.10...20.00 A
6.00
3
U< SEAL-IN
ON,OFF
ON
4
U<
10.0..125.0 V
88.00
5
T-SEAL-IN
0.10..60.00 sec
3.00
sec
6
T END
0.00..60.00 sec; ∞
2.00
sec
7
ZONE Z1
0.05..130.00 Ohm
1.00
Ohms
8
T-Z1
0.00..60.00 sec; ∞
0.10
sec
9
ZONE Z1B
0.05..65.00 Ohm
3.00
Ohms
10
T-Z1B
0.00..60.00 sec; ∞
∞
11
ZONE Z2
0.05..65.00 Ohm
3.00
Ohms
12
ZONE2 T2
0.00..60.00 sec; ∞
0.60
sec
13
POWER SWING
ON,OFF
OFF
1
IMPEDANCE PROT.
2
Page 7 of 25
ON A
V
sec
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
GEN .POLE SLIPPING PROTECTION (OR) OUT-OF-STEP PROTECTION(78)
I1> RELEASE
OFF,ON,Block relay for trip commands 20…400 %
120
%
3
I2< RELEASE
5…100 %
20
%
4
Za
0.20…130.00
1.00
Ohms
5
Zb
0.10…130.00
3.00
Ohms
6
Zc
0.10…130.00
1.00
Ohms
7
Zd-Zc
0.00…130.00
9.00
Ohms
1
OUT-OF-STEP
2
O
ON
O
8
PHI POLYGON
60.0…90.0
9
REP CHAR.1
1…4
1
10
REP CHAR.2
1…8
4
11
T-HOLDIG
0.20…60.00 sec
20.00
sec
12
T-SIGNAL
0.02…0.15 sec
0.05
sec
1
BREAKER FAILURE
ON/OFF
ON
2
TRIP INTERN
OFF Start Breaker Failure with Bin.Outp.12 Start Breaker
Start Breaker Failure with CFC
3
CIRCUIT BREAKER I>
0.04-2.00A
0.2
4
TRIP TIMER
0.06-60sec
0.20
1
Ther. OVER LOAD
OFF / ON / Block relay for trip commands / Alarm Only
Alarm only
2
K-FACTOR
0.10..4.00
1.1
3
TIME CONSTANT
30..32000 sec
600.00
sec
4
Θ ALARM
70..100 %
90
%
5
I ALARM
0.50 .. 20.00 A
5.00
A
6
Kτ-FACTOR
1.0..10.0
1.00
7
I MAX THERM
2.50 .. 40.00 A
13.48
8
T EMERGENCY
10..15000 sec
100.00
sec
9
TEMP. RISE I
40..200 °C
100.00
°C
10
TEMP. RISE I
104..392 °F
212.00
°F
11
TEMP. INPUT
Disabled / 4-20 mA / Field bus / Temp. of RTD 1
Disabled
12
TEMP. SCAL.
40..300 °C
100.00
°C
13
TEMP. SCAL.
104..572 °F
212.00
°F
90.0
BREAKER FAIL PROTECFTION 50BF
A sec
THERMAL OVERLOAD PROTECTION (49)
Page 8 of 25
A
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
GTG MAIN-2 RELAY PANEAL (7UM62-GR2) SI.NO
FUNCTION
SETTING RANGE
RECOMMENDED SETTING
DIFFERENTIAL PROTECTION (87G)
1
Differential Protection
OFF,ON,Block relay for trip commands
ON
2
I-DIFF>
0.05..2.00 I/InO
0.20
I/InO
3
T I-DIFF>
0.00..60.00 sec; ∞
0.00
sec
4
I-DIFF>>
0.5..12.0 I/InO; ∞
6.00
I/InO
5
T I-DIFF>>
0.00..60.00 sec; ∞
0.00
sec
6
SLOPE 1
0.10..0.50
0.25
7
BASE POINT 1
0.00..2.00 I/InO
0.00
8
SLOPE 2
0.25..0.95
0.50
9
BASE POINT 2
0.00..10.00 I/InO
2.50
I/InO
10
I-ADD ON STAB.
2.00..15.00 I/InO
4.00
I/InO
1
IMPEDANCE PROT.
OFF,ON,Block relay for trip commands
ON
2
IMP I>
0.10...20.00 A
6.00
3
U< SEAL-IN
ON,OFF
ON
4
U<
10.0..125.0 V
88.00
5
T-SEAL-IN
0.10..60.00 sec
3.00
sec
6
T END
0.00..60.00 sec; ∞
2.00
sec
7
ZONE Z1
0.05..130.00 Ohm
1.00
Ohms
8
T-Z1
0.00..60.00 sec; ∞
0.10
sec
9
ZONE Z1B
0.05..65.00 Ohm
3.00
Ohms
10
T-Z1B
0.00..60.00 sec; ∞
∞
11
ZONE Z2
0.05..65.00 Ohm
3.00
Ohms
12
ZONE2 T2
0.00..60.00 sec; ∞
0.60
sec
13
POWER SWING
ON,OFF
OFF
1
ROTOR E/F
OFF,ON,Block relay for trip commands
ON
2
RE< WARN
3.0..30.0 kOhm
10.00
kOhm
3
RE<< TRIP
1.0..5.0 kOhm
2.00
kOhm
4
T-WARN-RE<
0.00..60.00 sec; ∞
10.00
sec
5
T-TRIP-RE<<
0.00..60.00 sec; ∞
0.50
sec
I/InO
IMPEDANCE PROTECTION (21)
A
V
sec
ROTOR EARTH FAULT PROTECTION (64R)
GEN .POLE SLIPPING PROTECTION (OR) OUT-OF-STEP PROTECTION(78)
I1> RELEASE
OFF,ON,Block relay for trip commands 20…400 %
120
%
3
I2< RELEASE
5…100 %
20
%
4
Za
0.20…130.00
1.00
Ohms
5
Zb
0.10…130.00
3.00
Ohms
6
Zc
0.10…130.00
1.00
Ohms
7
Zd-Zc
0.00…130.00
9.00
Ohms
1
OUT-OF-STEP
2
O
ON
O
8
PHI POLYGON
60.0…90.0
9
REP CHAR.1
1…4
1
10
REP CHAR.2
1…8
4
11
T-HOLDIG
0.20…60.00 sec
20.00
sec
12
T-SIGNAL
0.02…0.15 sec
0.05
sec
Page 9 of 25
90.0
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
DEAD MACHINE PROTECTION (OR) INADVERTENT ENERGIZATION (50)
1
INADVERT. EN.
OFF,ON,Block relay for trip commands
ON
2
I STAGE
0.1..20.0 A; ∞
0.5
A
3
RELEASE U1<
10.0..125.0 V; 0
55
V
4
PICK UP T U1<
0.00..60.00 sec; ∞
5.00
sec
5
DROP OUT T U1<
0.00..60.00 sec; ∞
1.00
sec
ON
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46)
1
UNBLANCED LOAD
OFF,ON,Block relay for trip commands
2
I2>
3.0…30.0%
3
T WARN
0.00…60.00 sec; ∞
20
sec
2
FACTOR K
2.0…100.00 sec; ∞
7.2
sec
3
T COOL DOWN
0…50000 sec
1250.0
sec
4
I2>>
10…100%
60
%
5
T I2>>
0.00…60.00 sec; ∞
3.00
sec
1
UNDEREXCIT
OFF,ON,Block relay for trip commands
ON
2
T SHRT Uex<
0.00…60.00 sec; ∞
0.50
3
EXCIT.VOLT.
ON,OFF
OFF
4
Uexcit<
0.50…8.00V
2.00
V
5
Umin
10.0…125.0V
25.0
V
6
1/Xd CHAR.1
0.25…3.00
0.49
7
ANGLE 1
50…120O
80O
8
T CHAR. 1
0.00…60.00 sec; ∞
10.00
9
1/Xd CHAR.2
0.25…3.00
0.44
10
ANGLE 2
50…120O
90O
11
T CHAR. 2
0.00…60.00 sec; ∞
10.00
12
1/Xd CHAR.3
0.25…3.00
1.10
13
ANGLE 3
50…120O
90O
14
T CHAR. 3
0.00…60.00 sec; ∞
0.30
1
UNDERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U<
10.0..125.0 V
99.0
V
3
T U<
0.00..60.00 sec; ∞
3.00
sec
4
U<<
10.0..125.0 V
88.0
V
5
T U<<
0.00..60.00 sec; ∞
0.50
sec
6
U< DOUT RATIO
1.01..1.20
1.05
%
LOSS OF EXCITATION (40)
sec
sec
sec
sec
UNDERVOLTAGE PROTECTION (27)
INVERSE TIME OVER CURRENT, WITH VOLTAGE CONTROL OR VOLTAGE RESTRAINT (51V)
1
O/C Ip
OFF,ON,Block relay for trip commands
ON
2
Ip
0.10..4.00 A
1.0
3
TIME DIAL: TD
0.50..15.00; ∞
0.50
4
IEC CURVE
Normal Inverse,Very Inverse,Extremely Inverse
Normal Inverse
5
U<
10.0..125.0 V
88.00
Page 10 of 25
A
V
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
UNDER&OVER FREQUENCY (81)
1
O/U FREQUENCY
OFF,ON,Block relay for trip commands
ON
2
f1 PICKUP (UNDER)
40.00..65.00 Hz
49.0
Hz
4
T f1
0.00..600.00 sec
0
sec
5
f2 PICKUP (UNDER)
40.00..65.00 Hz
47.5
Hz
7
T f2
0.00..600.00 sec
2.00
sec
9
f3 PICKUP (OVER)
40.00..65.00 Hz
51.0
Hz
10
T f3
0.00..600.00 sec
2.00
sec
9
f4 PICKUP (OVER)
40.00..65.00 Hz
52.5
Hz
10
T f4
0.00..600.00 sec
1.00
sec
11
THRESHOLD f4
Freq. prot. stage automatic,Freq. prot. stage overfreqency,Freq. prot. stage underfreqency
Freq. prot. stage automatic
12
Umin
10.0..125.0 V; 0
72.00
1
OVERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U>
30.0..170.0 V
116.0
3
T U>
0.00..60.00 sec; ∞
3.00
4
U>>
30.0..170.0 V
121.0
5
T U>>
0.00..60.00 sec; ∞
0.50
6
U> DOUT RATIO
0.90..0.99
0.95
7
VALUES U>
V
OVERVOLTAGE PROTECTION (59)
V sec V sec
Voltage protection with UPhaseVoltage protection with UPhase,Voltage protection with Phase-Phase UPhase-earth.
OVERFLUXING PROTECTION (99)
1
OVEREXC. PROT.
OFF,ON,Block relay for trip commands
ON
2
U/f >
1.00..1.20
1.10
3
T U/f >
0.00..60.00 sec; ∞
10
4
U/f >>
1.00..1.40
1.40
5
T U/f >>
0.00..60.00 sec; ∞
1
1
REVERSE POWER
OFF,ON,Block relay for trip commands
ON
2
P> REVERSE
30.00..-0.50 %
-1.930
%
3
T-SV-OPEN
0.00..60.00 sec; ∞
2.00
sec
4
T-HOLD
0.00..60.00 sec; ∞
0.00
sec
sec
sec
REVERSE POWER PROTECTION (32)
GENERATOR INTERTURN FAULT PROTECTION (59N)
1
Interturn protn
OFF/ON/Block relay
ON
2
U Interturn V>
0.3 .. 130.0 V
5.00
V
3
T-U Interturn V>
0.00 .. 60.00 sec; ∞
0.50
sec
4
Reset ratio
50 .. 95 %
80.00
%
1
BREAKER FAILURE
ON/OFF
ON
2
TRIP INTERN
OFF Start Breaker Failure with Bin.Outp.12 Start Breaker
Start Breaker Failure with CFC
3
CIRCUIT BREAKER I>
0.04-2.00A
0.2
4
TRIP TIMER
0.06-60sec
0.20
BREAKER FAIL PROTECFTION 50BF
Page 11 of 25
A sec
SPML-S10IRJ01-DD-EE-01-A DSGN VS CHKD MN
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED 123.7MW GAS TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
THERMAL OVERLOAD PROTECTION (49)
1
Ther. OVER LOAD
OFF / ON / Block relay for trip commands / Alarm Only
Alarm only
2
K-FACTOR
0.10..4.00
1.1
3
TIME CONSTANT
30..32000 sec
600.00
sec
4
Θ ALARM
70..100 %
90
%
5
I ALARM
0.50 .. 20.00 A
5.00
A
6
Kτ-FACTOR
1.0..10.0
1.00
7
I MAX THERM
2.50 .. 40.00 A
13.48
8
T EMERGENCY
10..15000 sec
100.00
sec
9
TEMP. RISE I
40..200 °C
100.00
°C
10
TEMP. RISE I
104..392 °F
212.00
°F
11
TEMP. INPUT
Disabled / 4-20 mA / Field bus / Temp. of RTD 1
Disabled
12
TEMP. SCAL.
40..300 °C
100.00
°C
13
TEMP. SCAL.
104..572 °F
212.00
°F
A
POWER SYSTEM DATA POWER SYSTEM DATA
50 Hz 60 Hz L1 L2 L3 L1 L3 L2 Direct connected to busbar Unit transformer connected YES NO
50 HZ
1
Rated frequency
2
PHASE SEQ
3
Scheme
4
ATEX100
5
factor R SEF
1.0..200.0
27.00
6
Temp unit
Degree Celsius Degree Fahrenheit
DEGREE CELCIUS
7
UN Generator
0.40..800.00 Kv
11
8
SN Generator
0.20..5000.00 MVA
145.53
Isolated Solid Earthed Isolated Solid Earthed YES NO 1..100000 A 1A 5A -5.00..5.00 °
L1 L2 L3 Unit transformer connected NO
Starpoint S1
10
Starpoint S2
15
STRPNT OBJ S1
16
IN PRI-1 SIDE-1
17
IN SEC-1 SIDE-1
18
CT ANGLE W0
19
FACTOR IEE1
20
STR PNT OBJ S2
21
IN PRI-1 SIDE-2
22
IN SEC-1 SIDE-2
23
FACTOR IEE2
1.0..100000.0
1
24
GRD TERM. IEE2
Terminal Q7 Terminal Q8
Q7
25
UNOM PRIMARY
0.10..400.00 kV
11
26
UNOM SECONDARY
100..125 V
110
27
UE CONNECTION
UE connected to neutral transformer UE connected to broken delta winding not connected UE connected to any VT UE connected to Rotor UE connected to Loading Resistor
UE connected to Loading Resistor
28
FACTOR UE
1.0..2500.0
72.17
29
UPH/UDELTA
1.00..3.00
1.732
30
T MIN TRIP CMD
0.01..32.00 sec
0.15
Note: 1) Address 0152 is set to Disable Since the System Scheme Configuration is Unit transformer connected. 2) In Thermal Overload Protection Only Alarm Stage is Enabled as per the protection scheme 3) Machines in Unit transformer connection the evaluation of the displacement voltage is sufficient for 95% Stator Earth Fault Protection (64G)
Page 12 of 25
MVA
ISOLATED
9
1.0..100000.0 YES NO 1..100000 A 1A 5A
KV
ISOLATED YES 8500
A
5
A
0 300 YES 8500
A
5
A
KV V
SEC
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
Relay Details Relay Type Make Rated current
7UM62 SIEMENS 5A
GENERATOR DETAILS: Rated Active Power Rated Apparent Power Rated Voltage (U Nmach) Rated Current (INmach )
= = = = = = = = = = = = = = =
59.7 70.2 11 3686.51 0.85 50 0.118 0.187 1.925 11000 220 0.424 25 0.08 8
PT Secondary PTR
= = =
11000 110 100
V V
GENERATOR CT DETAILS: CT Primary (IN CT prim) CT Secondary (IN CT Sec) CTR
= = =
4000 5 800
A A
GENERATOR TRANSFORMER DETAILS: Rated Capacity HV Voltage Rating LV Voltage Rating % Impedance
= = = =
60 230000 11000 12.50
GENERATOR TRANSFORMER CT DETAILS: HV Side CT Primary HV Side CT Secondary HV Side Neutral CT Primary HV Side Neutral CT Secondary
= = = =
500 1 250 1
Power Factor Rated Frequency X"d (Sub Transient Reactance) X'd (Transient Reactance) Xd (Direct Axis Reactance) Neutral Grounding Transformer Primary Neutral Grounding Transformer Secondary NGT Secondary Reactor Value Neutral Grounding Transformer Capacity Negative Sequence Capability I2S I2^2t
GENERATOR PT DETAILS: PT Primary (UN VT prim)
NEUTRAL GROUNDING TRANSFORMER HV Side LV Side Neutral CT Primary Neutral CT Secondary Load Resistance Rprimary Full Load Current CT Secondary Current
MW MVA kV A lag
8.00 Sec.
%
95% STATOR EARTH FAULT PROTECTION (64G) For machines in Unit transformer connection the evaluation of the displacement voltage is sufficient. Displacement Voltage: = = = =
110.00 5.5 6.05 6
Page 13 of 25
Hz P.U P.U P.U V V Ohms KVA %
MVA V V 0.125
6351
300 A
230 kV 11 kV
A A A A
= 11000 = 220 = 400 = 5 = 0.424 = 36.6 = 3686.51 = 3686.51x(5/4000) = 4.61
Max Open Delta Voltage With 5% of setting With 110% of margin setting U0>
11000 V
V V V V
V V A A A A A
(11000/√3)
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
100-% STATOR EARTH FAULT PROTECTION WITH 20HZ VOLTAGE INJECTION (64G) THE FACTOR R SEF =
ü2Transf x(üDivider/üMinCT)
for üTransf =üNeutral Transf = (UNprim/√3)/(UNsec) = (11000/1.732)/(220) = 28.87 The transformation ratio of the miniature CT is 400/5A
üDivider = 5/2 = üMinC = = = THE FACTOR R SEF =
2.5 400/5 80 (28.87^2)x(2.5/80) 26.043
If for the Trip stage R<< a generator-side fault resistance of 1000 is chosen A resistance of R<< SEF TRIP = (1000/26.043) = 38.4 = 40 If for the Alarm stage R< a generator-side fault resistance of 3000 is chosen A resistance of R< SEF ALARM = (3000/26.043) = 115.19 = 120 THE EARTH CURRENT STAGE, SEF I>> = 0.2*(UNsec/RL)*(1/üMin CT) = 0.2x((11000/√3)/36.6)x((1/400/5)) = 0.434 A
IMPEDANCE PROTECTION (21) Maximunm load current setting: Rated current of Generator Max current at 95% voltage
= 3686.51 = 3881
A A
As this relay should not pickup for overload,120% safty factor is considered IMP I> = 3
Generator Transformer back-up impedance protection setting: Generator Transformer Impedance at 11000V base = = Generator Transformer Impedance x 0.8 = = Secondary Impedance = = ZONE Z1 = Line back-up impedance protection setting: Line positive sequence impedance/Km Line Voltage Line Length
System Impedance on 22000V base Total Impedance
Total Secondary Impedance
= = = = = = = = = = = ZONE Z2 =
A
(11000x11000x0.125)/(60x1000000) 0.252 Ohms (0.252x0.8) 0.202 Ohms 0.202x(CTR/VTR) 0.202x(800/100) 2.000 Ohms 0.075 Ohms 230000 V 210.000 km (0.075x210) 15.724 Ohms (Imp. On 220000V base)x (11000x11000)/(230000x230000) 0.036 Ohms (Line Imp. + Transformer Imp.)x 1.1 (0.036+0.252)x1.1 0.317 Ohms 0.317x(CTR/VTR) 3.000 Ohms
Page 14 of 25
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
LOSS OF EXCITATION (40) The reciprocal of secondary per unit synchronous direct reactance is,
1/Xdsec = (1/Xdmach)x(INmach/UNmach)x(UN VT prim/IN CT prim) = (1/1.925)x(3686.51/11000)x(11000/4000) = 0.479
CHAR 1 Muliplied by a safety factor of about 1.05, the setting value 1/Xdsec is, = 0.510 CHAR 2 1/Xdsec in CHAR 2 is set to about 0.9 of CHAR 1
= 0.460
CHAR 3 is for dynsmic stability of the machine and is set between 1/X d and 1/Xd'
1/Xd'sec = (1/Xd'mach)x(INmach/UNmach)x(UN VT prim/IN CT prim) = 4.928 CHAR 3 value1/xd CHAR. 3 situated approximately between the synchronous direct reactance xd and the transient reactance xd'. However, it should be greater than 1.
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46)
pickup thershold
Pickup Setting I2> =
(I2 max prim/IN machine)x(IN machine/IN CT prim)
max. perm.(I2 max prim /IN machine) in permanent operation in = 8.00 our machine
%
= (8)x(3686.51/4000) I2 = 7 %
Negative Sequence Factor K,
Ksec
=
Kprimary x(IN Machine/IN CT prim)2
Kprimary = 8 sec. = 8x(3686.51/4000) sec. FACTOR K = 7
Time for Cool Down,
tcooldown
=
Kprimary /(I2 perm/IN)2
= 1250
sec.
GEN .POLE SLIPPING PROTECTION ( OR) OUT-OF-STEP PROTECTION(78) The power swing rectance of the machine must be considered, which is approximately the transient reactance
Zb=X'd Zb = (X'd)x(kV2/MVA)x(CTR/VTR) Per unit Impedance (pu)
Zb
= = = = = = =
kV2 /MVA 11^2/70.24 1.723 Ohms 1.723x (CTR/PTR) 13.800 Ohms 13.8x0.187 3 Ohms
Thus ZC is set to 85% of the transformer impedance X SC .
ZC = 0.85 x XSC XSC = XSC prim x (kV2/MVA) x (CTR/VTR) = = = = = = ZC = =
kV2 /MVA 11^2/60 2.017 Ohms 2.017x (CTR/PTR) 16.200 Ohms 2.025 0.85x2.025 2.000 Ohms
Page 15 of 25
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
Thus Za is decisive for the width of the power swing polygon
Za = 0.289 x Ztot Ztot = Zb + ZC = 5.000 Za = 1.00
Ohms
The covered system reactance should be 10,so
Zd = 10
Ohms
Zd-Zc = 8.00
Ohms
factor UE = 72.17 EXCITOR CB TIME DELAY
200 ms
THERMAL OVERLOAD PROTECTION (49) K-FACTOR: The K-FACTOR refers to the secondary nominal current. The following applies for the conversion Imax prim
= 115% X Inmach = 1.15 X 3686.51 A = 4239.48
IN
CT prim
= 4000
K-FACTOR
= Imax
A prim /
IN CT
prim
= 1.1
TIME CONSTANT (τ): Set Default Value as Q ALARM (Θ ⁄ Θtrip):
= 600
Sec
Q ALARM (Θ ⁄ Θtrip) issues thermal warning prior to tripping & is given in % of the tripping temperature level. = 1/(K-FACTOR)2 = 1/(1.1)^2 = 90.0 %
I ALARM: This level is set in secondary amperes, and should be set equal to, or slightly less than, the permissible continuous current K-FACTOR IN sec. = IN se c = 5 A Kτ-FACTOR: Set Default Value as
= 1
I MAX THERM.:
= = = =
T EMERGENCY: Set Default Value as
3 X Nominal generator current 3 X Inmach X (IN CT Sec/IN CT Prim) 3 X 3686.51 X (5/4000) 13.82 A
= 100
Sec
TEMP. RISE I : ΘNsec = ΘNMach x (INprim/INmach)2 where,
ΘNsec = Machine temperature with nominal secondary current ΘNMach = Machine temperature with nominal machine current = 84.5 (Considered for Calculation) °C Inprim = Nominal primary current of the current transformers A = 4000 INMach = Nominal machine current = 3686.51 A
= 84.5 X (4000/3686.51)^2 °C = 100.0 If the temperature input is used, the trip times change if the coolant temperature deviates from the internal reference temperature of 40 °C. The following formula can be used to calculate the trip time: (I/k.IN)2 + ((ΘK – 40 °C)/ (k2 ⋅ ΘN)) - (Ipre/k ⋅ IN)2 t = τ . ln (I/k.IN)2 + ((ΘK – 40 °C)/ (k2 ⋅ ΘN)) - 1 Therefore,
where,
ΘNsec
τ
= TIME CONSTANT k = K-FACTOR IN = Nominal device current
Page 16 of 25
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
I Ipre ΘN ΘK
= = = =
Actually flowing secondary current Previous load current Temperature with nominal current IN Coolant temperature input
The following trip times result for different ambient temperatures ΘK with a supposed load current of I = 1.5 IN Ipre = 0 with ΘK = 40 °C:
t
= 600 x ln = 463
with ΘK = 80 °C:
t
t
(1.5/1.1)2 + ((40 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 1
Sec
= 600 x ln = 366
with ΘK = 0 °C:
(1.5/1.1)2 + ((40 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 0
(1.5/1.1)2 + ((80 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 0 (1.5/1.1)2 + ((80 °C – 40 °C)/ (1.1 2 ⋅ 100 °C)) - 1
Sec
= 600 x ln = 637
(1.5/1.1)2 + ((0 °C – 40 °C)/ (1.1 2 x 100 °C)) - 0 (1.5/1.1)2 + ((0 °C – 40 °C)/ (1.1 2 x 100 °C)) - 1
Sec
STG MAIN-1 RELAY PANEAL (7UM62-GR1) SI.NO
FUNCTION
SETTING RANGE
RECOMMENDED SETTING
DIFFERENTIAL PROTECTION (87G)
1
Differential Protection
OFF,ON,Block relay for trip commands
ON
2
I-DIFF>
0.05..2.00 I/InO
0.20
I/InO
3
T I-DIFF>
0.00..60.00 sec; ∞
0.00
sec
4
I-DIFF>>
0.5..12.0 I/InO; ∞
8.00
I/InO
5
T I-DIFF>>
0.00..60.00 sec; ∞
0.00
sec
6
SLOPE 1
0.10..0.50
0.25
7
BASE POINT 1
0.00..2.00 I/InO
0.00
8
SLOPE 2
0.25..0.95
0.50
9
BASE POINT 2
0.00..10.00 I/InO
2.50
I/InO
10
I-ADD ON STAB.
2.00..15.00 I/InO
4.00
I/InO
I/InO
95% STATOR EARTH FAULT PROTECTION (64G)
1
S/E/F PROT.
OFF,ON,Block relay for trip commands
ON
2
U0>
2.0..125.0 V
6
V
3
T S/E/F
0.00..60.00 sec; ∞
0
sec
100-% STATOR EARTH FAULT PROTECTION WITH 20HZ VOLTAGE INJECTION (64G)
1
100% SEF-PROTN.
OFF,ON,Block relay for trip commands
ON
2
R< SEF ALARM
20…700 Ohm
120
Ohm
3
R<< SEF TRIP
20…700 Ohm
40
Ohm
4
T SEF ALARM
0.00…60.00 sec; ∞
10.00
sec
5
T SEF TRIP
0.00…60.00 sec;∞
1.00
sec
6
SEF I>>
0.02…1.50A
0.43
A
7
U20MIN
0.3…15.0V
1.00
V
8
I20MIN
5…40mA
10.00
9
PHI ISEF
-60O...60O
0o
10
SEF Rps
0…700 Ohm
0
Ohm
11
RI-PARALLEL
20…700 Ohm;∞
∞
Ohm
Page 17 of 25
mA
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
ROTOR EARTH FAULT PROTECTION (64R)
1
ROTOR E/F
OFF,ON,Block relay for trip commands
ON
2
RE< WARN
3.0..30.0 kOhm
10.00
kOhm
3
RE<< TRIP
1.0..5.0 kOhm
2.00
kOhm
4
T-WARN-RE<
0.00..60.00 sec; ∞
10.00
sec
5
T-TRIP-RE<<
0.00..60.00 sec; ∞
0.50
sec
1
REVERSE POWER
OFF,ON,Block relay for trip commands
ON
2
P> REVERSE
30.00..-0.50 %
-1.930
%
3
T-SV-OPEN
0.00..60.00 sec; ∞
2.00
sec
4
T-HOLD
0.00..60.00 sec; ∞
0.00
sec
REVERSE POWER PROTECTION (32)
GENERATOR INTERTURN FAULT PROTECTION (59N)
1
Interturn protn
OFF/ON/Block relay
ON
2
U Interturn V>
0.3 .. 130.0 V
5.00
V
3
T-U Interturn V>
0.00 .. 60.00 sec; ∞
0.50
sec
4
Reset ratio
50 .. 95 %
80.00
%
DEAD MACHINE PROTECTION (OR) INADVERTENT ENERGIZATION (50)
1
INADVERT. EN.
OFF,ON,Block relay for trip commands
ON
2
I STAGE
0.1..20.0 A; ∞
0.5
A
3
RELEASE U1<
10.0..125.0 V; 0
55
V
4
PICK UP T U1<
0.00..60.00 sec; ∞
5.00
sec
5
DROP OUT T U1<
0.00..60.00 sec; ∞
1.00
sec
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46)
1
UNBLANCED LOAD
OFF,ON,Block relay for trip commands
ON
2
I2>
3.0…30.0%
7.0
%
3
T WARN
0.00…60.00 sec; ∞
20
sec
2
FACTOR K
2.0…100.00 sec; ∞
7
sec
3
T COOL DOWN
0…50000 sec
1250.0
sec
4
I2>>
10…100%
60
%
5
T I2>>
0.00…60.00 sec; ∞
3.00
sec
1
UNDEREXCIT
OFF,ON,Block relay for trip commands
ON
2
T SHRT Uex<
0.00…60.00 sec; ∞
0.50
3
EXCIT.VOLT.
ON,OFF
OFF
4
Uexcit<
0.50…8.00V
2.00
V
5
Umin
10.0…125.0V
25.0
V
6
1/Xd CHAR.1
0.25…3.00
0.510
LOSS OF EXCITATION (40)
O
80O
7
ANGLE 1
50…120
8
T CHAR. 1
0.00…60.00 sec; ∞
10.00
9
1/Xd CHAR.2
0.25…3.00
0.460
O
ANGLE 2
50…120
11
T CHAR. 2
0.00…60.00 sec; ∞
10.00
12
1/Xd CHAR.3
0.25…3.00
1.10
13
ANGLE 3
50…120
14
T CHAR. 3
0.00…60.00 sec; ∞
Page 18 of 25
sec
90O
10
O
sec
sec
90O 0.30
sec
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
UNDERVOLTAGE PROTECTION (27)
U<
OFF,ON,Block relay for trip commands 10.0..125.0 V
99.0
V
3
T U<
0.00..60.00 sec; ∞
3.00
sec
4
U<<
10.0..125.0 V
88.0
V
5
T U<<
0.00..60.00 sec; ∞
0.50
sec
6
U< DOUT RATIO
1.01..1.20
1.05
1
UNDERVOLTAGE
2
ON
INVERSE TIME OVER CURRENT, WITH VOLTAGE CONTROL OR VOLTAGE RESTRAINT (51V)
1
O/C Ip
OFF,ON,Block relay for trip commands
ON
2
Ip
0.10..4.00 A
1.0
3
TIME DIAL: TD
0.50..15.00; ∞
0.50
4
IEC CURVE
Normal Inverse,Very Inverse,Extremely Inverse
Normal Inverse
5
U<
10.0..125.0 V
88.00
1
O/U FREQUENCY
OFF,ON,Block relay for trip commands
ON
2
f1 PICKUP (UNDER)
40.00..65.00 Hz
49.0
Hz
4
T f1
0.00..600.00 sec
0
sec
5
f2 PICKUP (UNDER)
40.00..65.00 Hz
47.5
Hz
7
T f2
0.00..600.00 sec
2.00
sec
9
f3 PICKUP (OVER)
40.00..65.00 Hz
51.0
Hz
10
T f3
0.00..600.00 sec
2.00
sec
9
f4 PICKUP (OVER)
40.00..65.00 Hz
52.5
Hz
10
T f4
0.00..600.00 sec
2.00
sec
11
THRESHOLD f4
Freq. prot. stage automatic,Freq. prot. stage overfreqency,Freq. prot. stage underfreqency
Freq. prot. stage automatic
12
Umin
10.0..125.0 V; 0
72.00
1
OVERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U>
30.0..170.0 V
116.0
3
T U>
0.00..60.00 sec; ∞
3.00
4
U>>
30.0..170.0 V
121.0
5
T U>>
0.00..60.00 sec; ∞
0.50
6
U> DOUT RATIO
0.90..0.99
0.95
7
VALUES U>
Voltage protection with UPhasePhase,Voltage protection with UPhase-earth.
Voltage protection with U-Phase-Phase
1
OVEREXC. PROT.
OFF,ON,Block relay for trip commands
ON
2
U/f >
1.00..1.20
1.10
3
T U/f >
0.00..60.00 sec; ∞
10
4
U/f >>
1.00..1.40
1.40
5
T U/f >>
0.00..60.00 sec; ∞
1
1
FORWARD POWER
OFF,ON,Block relay for trip commands
ON
2
Pf<
0.5..120.0 %
5
%
3
T-Pf<
0.00..60.00 sec; ∞
10
sec
4
Pf>
1.0..120.0 %
5
%
5
T-Pf>
0.00..60.00 sec; ∞
2
sec
6
MEAS. METHOD
Method accurate Method fast
Method accurate
A
V
UNDER&OVER FREQUENCY (81)
V
OVERVOLTAGE PROTECTION (59)
V sec V sec
OVERFLUXING PROTECTION (99)
sec
sec
LOW FORWARD POWER PROTECTION (37)
Page 19 of 25
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
IMPEDANCE PROTECTION (21)
1
IMPEDANCE PROT.
OFF,ON,Block relay for trip commands
ON
2
IMP I>
0.10...20.00 A
3.00
3
U< SEAL-IN
ON,OFF
ON
4
U<
10.0..125.0 V
88.00
5
T-SEAL-IN
0.10..60.00 sec
3.00
sec
6
T END
0.00..60.00 sec; ∞
2.00
sec
7
ZONE Z1
0.05..130.00 Ohm
2.00
Ohms
8
T-Z1
0.00..60.00 sec; ∞
0.10
sec
9
ZONE Z1B
0.05..65.00 Ohm
3.00
Ohms
10
T-Z1B
0.00..60.00 sec; ∞
∞
11
ZONE Z2
0.05..65.00 Ohm
3.00
Ohms
12
ZONE2 T2
0.00..60.00 sec; ∞
0.60
sec
13
POWER SWING
ON,OFF
OFF
A
V
sec
GEN .POLE SLIPPING PROTECTION (OR) OUT-OF-STEP PROTECTION(78)
1
OUT-OF-STEP
OFF,ON,Block relay for trip commands
ON
2
I1> RELEASE
20…400 %
120
%
3
I2< RELEASE
5…100 %
20
%
4
Za
0.20…130.00
1.00
Ohms
5
Zb
0.10…130.00
3.00
Ohms
6
Zc
0.10…130.00
2.00
Ohms
7
Zd-Zc
0.00…130.00
8.00
Ohms
8
PHI POLYGON
60.0…90.0O
90.0O
9
REP CHAR.1
1…4
1
10
REP CHAR.2
1…8
4
11
T-HOLDIG
0.20…60.00 sec
20.00
sec
12
T-SIGNAL
0.02…0.15 sec
0.05
sec
1
BREAKER FAILURE
ON/OFF
ON
2
TRIP INTERN
OFF Start Breaker Failure with Bin.Outp.12 Start Breaker Failure
Start Breaker Failure with CFC
3
CIRCUIT BREAKER I>
0.04-2.00A
0.2
4
TRIP TIMER
0.06-60sec
0.20
1
Ther. OVER LOAD
OFF / ON / Block relay for trip commands / Alarm Only
Alarm only
2
K-FACTOR
0.10..4.00
1.1
3
TIME CONSTANT
30..32000 sec
600.00
sec
4
Θ ALARM
70..100 %
90
%
5
I ALARM
0.50 .. 20.00 A
5.00
A
6
Kτ-FACTOR
1.0..10.0
1.00
7
I MAX THERM
2.50 .. 40.00 A
13.82
8
T EMERGENCY
10..15000 sec
100.00
sec
9
TEMP. RISE I
40..200 °C
100.00
°C
10
TEMP. RISE I
104..392 °F
212.00
°F
11
TEMP. INPUT
Disabled / 4-20 mA / Field bus / Temp. of RTD 1
Disabled
12
TEMP. SCAL.
40..300 °C
100.00
°C
13
TEMP. SCAL.
104..572 °F
212.00
°F
BREAKER FAIL PROTECFTION 50BF
A sec
THERMAL OVERLOAD PROTECTION (49)
Page 20 of 25
A
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
STG MAIN-2 RELAY PANEAL (7UM62-GR2) SI.NO
FUNCTION
SETTING RANGE
RECOMMENDED SETTING
DIFFERENTIAL PROTECTION (87G)
1
Differential Protection
OFF,ON,Block relay for trip commands
ON
2
I-DIFF>
0.05..2.00 I/InO
0.20
I/InO
3
T I-DIFF>
0.00..60.00 sec; ∞
0.00
sec
4
I-DIFF>>
0.5..12.0 I/InO; ∞
8.00
I/InO
5
T I-DIFF>>
0.00..60.00 sec; ∞
0.00
sec
6
SLOPE 1
0.10..0.50
0.25
7
BASE POINT 1
0.00..2.00 I/InO
0.00
8
SLOPE 2
0.25..0.95
0.50
9
BASE POINT 2
0.00..10.00 I/InO
2.50
I/InO
10
I-ADD ON STAB.
2.00..15.00 I/InO
4.00
I/InO
I/InO
95% STATOR EARTH FAULT PROTECTION (64G)
1
S/E/F PROT.
OFF,ON,Block relay for trip commands
ON
2
U0>
2.0..125.0 V
6
V
3
T S/E/F
0.00..60.00 sec; ∞
0
sec
100-% STATOR EARTH FAULT PROTECTION WITH 20HZ VOLTAGE INJECTION (64G)
1
100% SEF-PROTN.
OFF,ON,Block relay for trip commands
ON
2
R< SEF ALARM
20…700 Ohm
120
Ohm
3
R<< SEF TRIP
20…700 Ohm
40
Ohm
4
T SEF ALARM
0.00…60.00 sec; ∞
10.00
sec
5
T SEF TRIP
0.00…60.00 sec;∞
1.00
sec
6
SEF I>>
0.02…1.50A
0.43
A
7
U20MIN
0.3…15.0V
1.00
V
8
I20MIN
5…40mA
10.00
9
PHI ISEF
-60O...60O
0o
10
SEF Rps
0…700 Ohm
0
Ohm
11
RI-PARALLEL
20…700 Ohm;∞
20.00
Ohm
1
IMPEDANCE PROT.
OFF,ON,Block relay for trip commands
ON
2
IMP I>
0.10...20.00 A
3.00
3
U< SEAL-IN
ON,OFF
ON
4
U<
10.0..125.0 V
88.00
5
T-SEAL-IN
0.10..60.00 sec
3.00
sec
6
T END
0.00..60.00 sec; ∞
2.00
sec
7
ZONE Z1
0.05..130.00 Ohm
2.00
Ohms
8
T-Z1
0.00..60.00 sec; ∞
0.10
sec
9
ZONE Z1B
0.05..65.00 Ohm
3.00
Ohms
10
T-Z1B
0.00..60.00 sec; ∞
∞
11
ZONE Z2
0.05..65.00 Ohm
3.00
Ohms
12
ZONE2 T2
0.00..60.00 sec; ∞
0.60
sec
13
POWER SWING
ON,OFF
OFF
mA
IMPEDANCE PROTECTION (21)
Page 21 of 25
A
V
sec
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
ROTOR EARTH FAULT PROTECTION (64R)
1
ROTOR E/F
OFF,ON,Block relay for trip commands
ON
2
RE< WARN
3.0..30.0 kOhm
10.00
kOhm
3
RE<< TRIP
1.0..5.0 kOhm
2.00
kOhm
4
T-WARN-RE<
0.00..60.00 sec; ∞
10.00
sec
5
T-TRIP-RE<<
0.00..60.00 sec; ∞
0.50
sec
GEN .POLE SLIPPING PROTECTION (OR) OUT-OF-STEP PROTECTION(78)
1
OUT-OF-STEP
OFF,ON,Block relay for trip commands
ON
2
I1> RELEASE
20…400 %
120
%
3
I2< RELEASE
5…100 %
20
%
4
Za
0.20…130.00
1.00
Ohms
5
Zb
0.10…130.00
3.00
Ohms
6
Zc
0.10…130.00
2.00
Ohms
7
Zd-Zc
0.00…130.00
8.00
Ohms
8
PHI POLYGON
60.0…90.0O
90.0O
9
REP CHAR.1
1…4
1
10
REP CHAR.2
1…8
4
11
T-HOLDIG
0.20…60.00 sec
20.00
sec
12
T-SIGNAL
0.02…0.15 sec
0.05
sec
DEAD MACHINE PROTECTION (OR) INADVERTENT ENERGIZATION (50)
1
INADVERT. EN.
OFF,ON,Block relay for trip commands
ON
2
I STAGE
0.1..20.0 A; ∞
0.5
A
3
RELEASE U1<
10.0..125.0 V; 0
55
V
4
PICK UP T U1<
0.00..60.00 sec; ∞
5.00
sec
5
DROP OUT T U1<
0.00..60.00 sec; ∞
1.00
sec
NEGATIVE SEQUENCE (OR) UNBALANCED LOAD (46)
1
UNBLANCED LOAD
OFF,ON,Block relay for trip commands
ON
2
I2>
3.0…30.0%
7.000
%
3
T WARN
0.00…60.00 sec; ∞
20
sec
4
FACTOR K
2.0…100.00 sec; ∞
7.000
sec
5
T COOL DOWN
0…50000 sec
1250.0
sec
1
UNDEREXCIT
OFF,ON,Block relay for trip commands
ON
2
T SHRT Uex<
0.00…60.00 sec; ∞
0.50
3
EXCIT.VOLT.
ON,OFF
ON
4
Uexcit<
0.50…8.00V
2.00
V
5
Umin
10.0…125.0V
25.0
V
6
1/Xd CHAR.1
0.25…3.00
0.510
7
ANGLE 1
50…120O
80O
8
T CHAR. 1
0.00…60.00 sec; ∞
10.00
9
1/Xd CHAR.2
0.25…3.00
0.460
10
ANGLE 2
50…120O
90O
11
T CHAR. 2
0.00…60.00 sec; ∞
10.00
12
1/Xd CHAR.3
0.25…3.00
1.10
13
ANGLE 3
50…120O
90O
14
T CHAR. 3
0.00…60.00 sec; ∞
0.30
LOSS OF EXCITATION (40)
Page 22 of 25
sec
sec
sec
sec
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
UNDERVOLTAGE PROTECTION (27)
1
UNDERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U<
10.0..125.0 V
99.0
V
3
T U<
0.00..60.00 sec; ∞
3.00
sec
4
U<<
10.0..125.0 V
88.0
V
5
T U<<
0.00..60.00 sec; ∞
0.50
sec
6
U< DOUT RATIO
1.01..1.20
1.05
INVERSE TIME OVER CURRENT, WITH VOLTAGE CONTROL OR VOLTAGE RESTRAINT (51V)
1
O/C Ip
OFF,ON,Block relay for trip commands
ON
2
Ip
0.10..4.00 A
1.0
3
TIME DIAL: TD
0.50..15.00; ∞
0.50
4
IEC CURVE
Normal Inverse,Very Inverse,Extremely Inverse
Normal Inverse
5
U<
10.0..125.0 V
88.00
1
O/U FREQUENCY
OFF,ON,Block relay for trip commands
ON
2
f1 PICKUP (UNDER)
40.00..65.00 Hz
49.0
Hz
4
T f1
0.00..600.00 sec
0
sec
5
f2 PICKUP (UNDER)
40.00..65.00 Hz
47.5
Hz
7
T f2
0.00..600.00 sec
2.00
sec
9
f3 PICKUP (OVER)
40.00..65.00 Hz
51.0
Hz
10
T f3
0.00..600.00 sec
2.00
sec
9
f4 PICKUP (OVER)
40.00..65.00 Hz
52.5
Hz
10
T f4
0.00..600.00 sec
1.00
sec
11
THRESHOLD f4
Freq. prot. stage automatic,Freq. prot. stage overfreqency,Freq. prot. stage underfreqency
Freq. prot. stage automatic
12
Umin
10.0..125.0 V; 0
72.00
1
OVERVOLTAGE
OFF,ON,Block relay for trip commands
ON
2
U>
30.0..170.0 V
116.0
3
T U>
0.00..60.00 sec; ∞
3.00
4
U> DOUT RATIO
0.90..0.99
0.95
5
VALUES U>
Voltage protection with UPhasePhase,Voltage protection with UPhase-earth.
Voltage protection with U-Phase-Phase
1
OVEREXC. PROT.
OFF,ON,Block relay for trip commands
ON
2
U/f >
1.00..1.20
1.10
3
T U/f >
0.00..60.00 sec; ∞
10
4
U/f >>
1.00..1.40
1.40
5
T U/f >>
0.00..60.00 sec; ∞
1
1
FORWARD POWER
OFF,ON,Block relay for trip commands
ON
2
Pf<
0.5..120.0 %
5
%
3
T-Pf<
0.00..60.00 sec; ∞
10
sec
4
Pf>
1.0..120.0 %
5
%
5
T-Pf>
0.00..60.00 sec; ∞
2
sec
6
MEAS. METHOD
Method accurate Method fast
Method accurate
A
V
UNDER&OVER FREQUENCY (81)
V
OVERVOLTAGE PROTECTION (59)
V sec
OVERFLUXING PROTECTION (99)
sec
sec
LOW FORWARD POWER PROTECTION (37)
Page 23 of 25
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
REVERSE POWER PROTECTION (32)
1
REVERSE POWER
OFF,ON,Block relay for trip commands
ON
2
P> REVERSE
30.00..-0.50 %
-1.930
%
3
T-SV-OPEN
0.00..60.00 sec; ∞
2.00
sec
4
T-HOLD
0.00..60.00 sec; ∞
0.00
sec
GENERATOR INTERTURN FAULT PROTECTION (59N)
1
Interturn protn
OFF/ON/Block relay
ON
2
U Interturn V>
0.3 .. 130.0 V
5.00
V
3
T-U Interturn V>
0.00 .. 60.00 sec; ∞
0.50
sec
4
Reset ratio
50 .. 95 %
80.00
%
1
BREAKER FAILURE
ON/OFF
ON
2
TRIP INTERN
OFF Start Breaker Failure with Bin.Outp.12 Start Breaker Failure
Start Breaker Failure with CFC
3
CIRCUIT BREAKER I>
0.04-2.00A
0.2
4
TRIP TIMER
0.06-60sec
0.20
1
Ther. OVER LOAD
OFF / ON / Block relay for trip commands / Alarm Only
Alarm Only
2
K-FACTOR
0.10..4.00
1.1
3
TIME CONSTANT
30..32000 sec
600.00
sec
4
Θ ALARM
70..100 %
90
%
5
I ALARM
0.50 .. 20.00 A
5.00
A
6
Kτ-FACTOR
1.0..10.0
1.00
7
I MAX THERM
2.50 .. 40.00 A
13.82
8
T EMERGENCY
10..15000 sec
100.00
sec
9
TEMP. RISE I
40..200 °C
100.00
°C
10
TEMP. RISE I
104..392 °F
212.00
°F
11
TEMP. INPUT
Disabled / 4-20 mA / Field bus / Temp. of RTD 1
Temp. of RTD 1
12
TEMP. SCAL.
40..300 °C
100.00
°C
13
TEMP. SCAL.
104..572 °F
212.00
°F
BREAKER FAIL PROTECFTION 50BF
A sec
THERMAL OVERLOAD PROTECTION (49)
Page 24 of 25
A
PROJECT: 160 MW CCPP, STAGE-III, RAMGARH TITLE: RELAY SETTING CALCULATION AND COORDINATION FOR GTG,STG & UAT. CLIENT : RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED
SPML-S10IRJ01-DD-EE-01-A VS DSGN MN CHKD
59.7MW STEAM TURBINE GENERATOR PROTECTIONS
RELAY TYPE : 7UM62
POWER SYSTEM DATA
50 Hz 60 Hz L1 L2 L3 L1 L3 L2 Direct connected to busbar Unit transformer connected YES NO
50 HZ
1
Rated frequency
2
PHASE SEQ
3
Scheme
4
ATEX100
5
factor R SEF
1.0..200.0
26.04
6
Temp unit
Degree Celsius Degree Fahrenheit
DEGREE CELCIUS
7
UN Generator
0.40..800.00 Kv
11
8
SN Generator
0.20..5000.00 MVA
70.24
Isolated Solid Earthed Isolated Solid Earthed YES NO
L1 L2 L3 Unit transformer connected NO
KV MVA
ISOLATED
9
Starpoint S1
10
Starpoint S2
15
STRPNT OBJ S1
16
IN PRI-1 SIDE-1
1..100000 A
4000
A
17
IN SEC-1 SIDE-1
1A 5A
5
A
18
CT ANGLE W0
-5.00..5.00 °
0
19
FACTOR IEE1
1.0..100000.0
300
20
STR PNT OBJ S2
YES NO
YES
21
IN PRI-1 SIDE-2
1..100000 A
4000
A
22
IN SEC-1 SIDE-2
1A 5A
5
A
23
FACTOR IEE2
1.0..100000.0
1
24
GRD TERM. IEE2
Terminal Q7 Terminal Q8
Q7
25
UNOM PRIMARY
0.10..400.00 kV
11
26
UNOM SECONDARY
100..125 V
110
27
UE CONNECTION
UE connecte to neutra transformer UE connected to broken delta winding not connected UE connected to any VT UE connected to Rotor UE connected to Loading Resistor
UE connected to Loading Resistor
28
FACTOR UE
1.0..2500.0
72.17
29
UPH/UDELTA
1.00..3.00
1.732
30
T MIN TRIP CMD
0.01..32.00 sec
0.15
SEC
31
T MIN TRIP CMD
0.01..32.00 sec
1.15
SEC
1
% of diff lockout V1& V2
2, 4, 6, 8, 8, 10
4
2
time
0.25, 0.5, 0.75, 1, 1.5
0.5
ISOLATED YES
KV V
Check synchronisation SKE11
Note: 1) Address 0152 is set to Disable Since the System Scheme Configuration is Unit transformer connected. 2) In Thermal Overload Protection Only Alarm Stage is Enabled as per the protection scheme 3) Machines in Unit transformer connection the evaluation of the displacement voltage is sufficient for 95% Stator Earth Fault Protection (64G)
Page 25 of 25
% SEC