Typical Results For Testing 87Bd; Differential Highset 87Hs - Siemens 7SR18 Solkor Manual

2.4
T
YPICAL RESULTS FOR TESTING
87BD I 87BD 1
NITIAL
S
ETTING
0.10 0.10
0.20 0.20
0.30 0.30
0.40 0.40
0.50 0.50
0.50 0.60
0.50 0.70
Selected Settings
Phase A Pickup
Phase B Pickup
Phase C Pickup
2.5
D
IFFERENTIAL
Differential Highset can be tested by single-phase secondary current injection. These settings will usually be
higher than the continuous thermal rating of the relay current inputs and equipment or test procedure should be
arranged in such a way that the short-term thermal withstand of the relay current inputs is not exceeded during
testing. 50 % of relay setting current can be injected into each relay simultaneously to achieve a differential
current level of 100 % if test current is limited by test equipment capacity.
During testing the Operate current can be monitored on the relay in the Instruments menu.
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Figure 2.3-3 Secondary Injection
87BD
B S
ST IAS LOPE
S
ETTING
0.00
Operate Current Measured on Ammeter A2
0.10
0.20
0.30
0.40
0.50
0.50
0.50
Test Results
0.00
H 87HS
IGHSET
7SR18 Commissioning & Maintenance Guide
B C ( I )
IAS URRENT X
N
M A
EASURED ON MMETER
1.00 1.50
0.11 0.16
0.22 0.33
0.35 0.53
0.50 0.75
0.67 1.00
0.86 1.29
1.08 1.62
1.00 1.50
A1
2.00 2.50
0.21 0.26
0.44 0.56
0.71 0.88
1.00 1.25
1.33 1.67
1.71 2.14
2.15 2.69
2.00 2.50
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