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Relay Test Record

The document provides test settings and measurement data for various protective relays for a substation. It includes: - Settings for distance, overcurrent, and line differential relays for different zones and elements - Measurement data for line parameters like impedance and fault current values - Calculations for new inverse time overcurrent relay settings based on transformer parameters

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Allama Hasan
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80 views8 pages

Relay Test Record

The document provides test settings and measurement data for various protective relays for a substation. It includes: - Settings for distance, overcurrent, and line differential relays for different zones and elements - Measurement data for line parameters like impedance and fault current values - Calculations for new inverse time overcurrent relay settings based on transformer parameters

Uploaded by

Allama Hasan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Gulshan 2

MCGG52 For R & B MCGG52 For Neutral


O/C E/F
Is 1.2 Is 0.2
IDMT If 1.5 If 1.5
TMS 0.55 TMS 0.85
Curve SI 17.215 SI 2.893895
Inst OFF OFF

MCGG62 RYB
IDMT O/C
Is 0.2
If 1.5
TMS 1
Curve D8 8
Inst I 1
MCGG52
OC EF
1.004473 1.041121
0.004473 0.041121
0.077 0.119
Rampura 230/132kV SS Secondary Injection Kit
Gulshan 2 Panel
S/l Relay Type Manufacturer Model Test Combination
1 Distance (21) Alstom OPTIMHO (LFZP) RN, YN, BN, RY, YB, BR
2 Phase Overcurrent (50) Alstom MCGG52 RB, R, B
Phase Overcurrent (51) N

Overcurrent E/F (50N) RB, R, B


Overcurrent E/F (51N) N

3 Overcurrent HighSet (50) Alstom MCGG62 RN, YN, BN, RY, YB, BR

Overcurrent HighSet (51) RN, YN, BN, RY, YB, BR

4 Line Differential ABB REL316*4 RN, YN, BN, RY, YB, BR


Injected Current Unknown

Settings Trip Time


Unknown
Instanteneous Inactive
IDMT Is TMS Curve
1.2 0.55 SI
Instanteneous Inactive
IDMT Is TMS Curve
0.2 0.85 SI
Instanteneous I
1
IDMT Is TMS Curve
0.2 1 D8 6s Approx.
Unknown
IDMT new setting calculation
New Setting
CTR
Is TMS Prim Sec Trafo MVA Voltage kV FL Current % Z
0.962279 0.128664 600 1 120 132 524.879278 12.43
110% of FL Current FL Current/% Z previous
Min I to Pick up Short Ckt Current CTR
577.367205542725 4222.68123705643 Is TMS Prim Sec
0.5 0.3 600 1

Standard Inverse Formula for Trip Time


* To set the TMS maximum fault current (short circuit current of transformer)
t=(0.14 𝑥 should be taken into consideration.
𝑇𝑀𝑆)/(( 〖𝐼𝑓 / Relay is expected to trip in 1.1 second for this current.

𝐼𝑠) 〗 ^0.02−1
)
TMS=((( 〖𝐼𝑓 /𝐼𝑠) 〗 ^0.02−1)
t 0.1
𝑥 𝑡)/0.14 If 3800
Is 0.962279
(If/Is)^0.02 1.180129
0.180129
TMS 0.128664
Trafo MVA Voltage kV FL Current %Z 110%FLC
75 132 328.0495486 360.8545

urrent of transformer)
Data Collected from Line Parameter Measuring
Z1=ZL Half of the average of the 3 line to line impedance
Z0 3 times of the triple line to ground impedance

Data Necessary to Set-up Schneider Distance Relay

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