LIN E NA ME : suratgarh
CALCULATION FOR THE RELAY REL670
A 1 2 3 4 5 6 7 8 9
System Particulars Line Parameters Rated Line Voltage in KV Line Length in kms Max. Power Flow in the Line in MVA Positive seqence Resistance in ohms/km Positive Sequence Reactance in ohms/km Zero sequence Resistance in ohms/km Zero sequence reactance in ohms/km Zero Sequence Mutual Resistance in ohms/km Zero Sequence Mutual Reactance in ohms/km
B a) 1 2 3 4 5 b) 1 2 3 4 5 c) 1 2 3 4 5 6 d) 1 2 3 4 5
Adjoining Line parameters Shortest Line Length of shortest line in kms Positive Sequence Resistance in ohms/km Positive Sequence Reactance in ohms/km Zero Sequence Resistance in ohms/km Zero sequence Reactance in ohms/km Longest Line Length of longest line Positive Sequence Resistance in ohms/km Positive Sequence Reactance in ohms/km Zero Sequence Resistance in ohms/km Zero sequence Reactance in ohms/km Transformer Transformer Impedance in pu Transformer MVA Positive Sequence Resistance in ohms/km Positive Sequence Reactance in ohms/km Zero Sequence Resistance in ohms/km Zero sequence Reactance in ohms/km Shortest Line (Reverse) Length of shortest line in kms Positive Sequence Resistance in ohms/km Positive Sequence Reactance in ohms/km Zero Sequence Resistance in ohms/km Zero sequence Reactance in ohms/km
Source Impedance FAULT MVA at Local-End (Maximum) 1 FAULT MVA at Local-End (Minimum) FAULT MVA at Local-End FAULT MVA at Remote-End (Maximum) FAULT MVA at Remote-End (Minimum) ( When BC at S/S O is off, this feeder acts as a 2 radial feeder radial feeder and there will not be any infeed from the remote end. Source impedance angle in deg 3 Angle in radians 4
400 170 600.00 0.02662 0.33093 0.261188 1.0313 0 0
176 0.02662 0.33093 0.261187 1.0314 176 0.02662 0.33093 0.261187 1.0314 N/A N/A N/A N/A N/A N/A 0 0.02662 0.33093 0.261187 1.0314
C
20000 18000 19000 18000 16000
17000 80 1.3968
Assumed as 50% of zero sequence impedanc e
5 6 7 8
Positive Sequence Resistance at local end, in ohms Positive Sequence Reactance at local end, in ohms Positive Sequence Resistance at remote end, in ohms Positive Sequence Reactance at remote end, in ohms
D 1 2 3 4
CT/PT Detail CT primary rating in A CT secondary rating in A PT primary rating in V PT secondary rating in V
E 1 2
Relay Detail Rated Current in A Rated Voltage in V
0.000 8.600 0.000 9.200
1000 1 400000 110
1 110
1 2 3 4 5 6 7 1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4 5 6
1 2 3 4 5 6 1 2 3 4
SYSTEM PARAMETERS Fault Resistance in primary for phase - earth faults Fault Resistance in primary for phase - earth faults Fault Resistance in primary for phase - earth faults Fault Resistance in primary for phase - phase faults Fault Resistance in primary for phase - phase faults Fault Resistance in primary for phase - phase faults Imp Ratio = CTR/PTR zone-1 setting - % of the protected line zone 2 setting - % of the shortest adjoining line zone53setting setting--% %of of the the adjacent longest adjoining zone shortest line in reverse direction Line Impedance in secondary Positive seqence Resistance in ohms Positive Sequence Reactance in ohms Zero sequence Resistance in ohms Zero sequence reactance in ohms Zero Sequence Mutual Resistance in ohms Zero Sequence Mutual Reactance in ohms Line Angle Shortest Line (Forward) Positive Sequence Resistance in ohms Positive Sequence Reactance in ohms Zero Sequence Resistance in ohms Zero sequence Reactance in ohms Shortest Line (Reverse) Positive Sequence Resistance in ohms Positive Sequence Reactance in ohms Zero Sequence Resistance in ohms Zero sequence Reactance in ohms Longest line section Positive Sequence Resistance in ohms Positive Sequence Reactance in ohms Zero Sequence Resistance in ohms Zero sequence Reactance in ohms Zone-1 setting Positive sequence Resistance in ohms Positive Sequence Reactance in ohms Zero sequence Resistance in ohms Zero sequence reactance in ohms Fault Resistance (ph-ph) Fault Resistance (ph-e) Zone-2 setting Positive seqence Resistance in ohms Positive Sequence Reactance in ohms Zero sequence Resistance in ohms Zero sequence reactance in ohms Fault Resistance (ph-ph) Fault Resistance (ph-e) Zone-3 setting Positive seqence Resistance in ohms Positive Sequence Reactance in ohms Zero sequence Resistance in ohms Zero sequence reactance in ohms
20 25 30 5 8 10 0.275 80% 20% 120% 20%
Assumed Assumed Assumed Assumed Assumed Assumed
1.2445 15.471 12.211 48.213 0 0 86 1.288 16.017 12.641 49.92 0 0 0 0
1.288 16.017 12.641 49.92 0.996 12.377 9.769 38.57 3.367 9.42
9.769 38.57
9.769 38.57
1.5021 18.6744 14.7392 58.197 5.2042 12.78947
14.6532 57.8556
14.7392 58.197
2.7901 34.6914 27.3802 26.8642 108.117 106.0686
27.3802 108.117
5 6 1 2 3 4 5 6
Fault Resistance (ph-ph) Fault Resistance (ph-e) Zone-5 setting Positive seqence Resistance in ohms Positive Sequence Reactance in ohms Zero sequence Resistance in ohms Zero sequence reactance in ohms Fault Resistance (ph-ph) Fault Resistance (ph-e)
8.3302 19.2368 0 0 0 0 0.48 0
The General Fault Criterion is an overall impedance measuring element with a very high reach and a long time delay for its tripping function.The GFC can be operated in two modes - the under impedance mode and the over current mode.In the under impedance mode, the GFC characteristic should, in general, cover all the impedance measuring zones used for distance protection, regardless of their directionality. Normally set to 2 times of zone-3 with a limit on the resistive direction so that the characteristics does not enter the load area. Load Impedance (primary) Load impedance (secondary) General sequence Fault Criterion Positive reactance for ph-ph & ph-e elements in the forward direction (2 * X3) Positive sequence reactance for ph-ph & ph-e elements in the reverse direction(20% of for forward Positive sequence Resistance phasereach) to phase faults for forward and Reverse reach for (2[2*R3 Rf]) Positive sequence Resistance phase+ to earth faults for forward and Reverse reach (2[1/3(2R3 + Zero sequence reactance for ph-e elements R03)+Rf]) in the forward directionreactance (2 * X03)for ph-e elements in the Zero sequence reverse direction (20% of forward reach) RLd - the resistive reach in the load impedance area Load Angle ARGLd
266.6667 73.33333
69.3828 6.93828 27.8208 60.4472 216.234 21.6234 60.4472 25 Assumed
Power Swing Block Function The reach of the Inner characteristic in the resistive and reactive direction are set so that the inner characteristic covers completely all the distance protection zones, which are to be blocked by the PSD function. At Reactive least 10%Reach of additional safety margin is considered of the Inner characteristic of the Power swing blocking = 1.1*X3 41.62968 Resistive Reachelement of the Inner characteristic of the Power swing blocking 9.99624 Reactive Reachelement=1.1(2R3+Rf) of the Outer characteristic of the Power swing blocking 52.0371 Resistive Reachelement of the Outer characteristic of the Power swing blocking element 12.4953
LINE NAME :
suratgarh
PARAMETER SETTING SETTING RANGE RECOMMENDED General setting Ib (FLC/CT Primary) 0.35 Iminop (10-30) % of Ib 20% ZONE I Operation Off,nondir,forward,rever Forward Settings of phase to phase measurement Operation PP On/Off On X1PP (0.01-400) 12.377 R1PP (0.01-400) 0.996 RFPP (0.01-400) 3.367 Timer t1PP Off,On On t1PP (0.0-60) 0 Settings for phase to earth element Operation PE On,Off On X1PE 0.01-400 12.377 R1PE 0.01-400 0.996 X0PE Group-I 38.57 0.01-1200 Group-II 38.57 Group-III 38.57 R0PE Group-I 9.769 0.01-1200 Group-II 9.769 Group-III 9.769 RFPE 0.01-400 9.42 Timer t1PE Off,On On t1PE 0-60 0
PARAMETER SETTING SETTING RANGE RECOMMENDED ZONE II Operation Off,nondir,forward,rever Forward Settings of Phase to phase measurement Operation PP On/Off On X1PP (0.01-400) 18.6744 R1PP (0.01-400) 1.5021 RFPP (0.01-400) 5.2042 Timer t2PP Off,On On t12P (0.0-60) 0.4 Settings of phase to earth measurement Operation PE On,Off On X1PE 0.01-400 18.6744 R1PE 0.01-400 1.5021 X0PE Group-I 58.197 0.01-1200 Group-II 57.8556 Group-III 58.197 R0PE Group-I 14.7392 0.01-1200 Group-II 14.6532 Group-III 14.7392 RFPE 0.01-400 12.789 Timer t2PE Off,On On
t2PE
0-60
0.4
PARAMETER SETTING SETTING RANGE RECOMMENDED Zone III Operation Off, nondir, forward, rev Forward Settings of Phase to Phase measurement Operation PP On/Off On X1PP (0.01-400) 34.6914 R1PP (0.01-400) 2.7901 RFPP (0.01-400) 8.3302 Timer t3PP Off,On On t3PP (0.0-60) 1 Settings of phase to earth measurement Operation PE On,Off On X1PE 0.01-400 34.6914 R1PE 0.01-400 2.7901 X0PE Group-I 108.117 0.01-1200 Group-II 106.0686 Group-III 108.117 R0PE Group-I 27.3802 0.01-1200 Group-II 26.8642 Group-III 27.3802 RFPE 0.01-400 19.2368 Timer t3PE Off,On On t3PE 0-60 0.8 PARAMETER SETTING SETTING RANGE RECOMMENDED Zone V Zone 5 Operation Off, nondir, forward, rev Reverse Settings of Phase to Phase measurement Operation PP On/Off Off X1PP (0.01-400) 0 R1PP (0.01-400) 0 RFPP (0.01-400) 0 Timer t5PP Off,On Off t5PP (0.0-60) 0 Settings of phase to earth measurement Operation PE On,Off On X1PE 0.01-400 0.16 R1PE 0.01-400 0.032 X0PE 0.01-1200 0.536 R0PE 0.01-1200 0.108 RFPE 0.01-400 0.72 Timer t5PE Off,On On t5PE 0-60 0.8
PARAMETER SETTING SETTING RANGE GFC General settings Operation On,Off Timer t PP On,Off tPP 0-60 Timer t PE On,Off tPE 0-60 Over current operating mode Operation I> On,Off IP> 10-400 In> 10-150 I> (10-50)% of Ir GFC (Settings of Under Impedance mode) Operation On,Off Opoeration
RECOMMENDED
PARAMETER SETTING PSB Operation Detection X1IN R1IN KX KR t P1 t P2 tW tH t EF t R1 t R2 Z com Operation Scheme type T coord T sendmin Unblock T security CurrReversal T pickup
RECOMMENDED
SETTING RANGE On,Off On,Off 0.1-400 0.1-400 120-200% 120-200% 0-60 0-60 0-60 0-60 0-60 0-60 0-60 On, Off I trip, PUR,POR, Block 0-60 0-60 Off, No restart, Restart 0-60 On,Off 0-60
On Off 2s Off 2s Off NA NA 10 On On 25 51.333 69.3828 6.93828 16.6604 69.3828 6.93828 216.234 21.6234 38.4736
On On 41.62968 9.99624 125 125 0.045 0.015 0.25 0.5 S 3S 0.3 2 On Permissive OR 0.05 0.1 Restart 0.035 s On 0.04
T delay WEI Twei UPN< UPP<
0-60 Off, trip, echo 0-60 10-100 20-170
PARAMETER SETTING SOTF Operation FFR Zeroseq 3U0> 3Io< BCS Operation IP> T DLD Operation U< IP< I> Operation IP> T Fault Locator Length unit Line length X1 R1 X0 R0 X1SA R1SA X1SB R1SB Xm0 Xm0 Xm0 Rm0 Rm0 Rm0 Distance unit VT Prim CTPrim
SETTING RANGE On/Off
0.04 Off NA NA NA RECOMMENDED On
On,Off 10-50% 10-50%
On 20% 10%
On,Off 10-100% 0-60
On 10% 20
On,Off 10-100% 5-100% of Ib
On 40% 10%
On.Off 20-300% 0-9000 Km/mile 0-10000 0.001-1500 (0.001-1500) (0.001-1500) (0.001-1500) (0.001-1500) (0.001-1500) (0.001-1500) (0.001-1500) Group-I (0.001-1500) Group-II Group-III Group-I (0.001-1500) Group-II Group-III %/Km/mile 1-9999 kV 1-9999 A
On 110% 20 s Km 170 15.471 1.2445 48.213 12.211 8.6 0 9.2 0 0 0 0 0 0 0 Km 400 1000
