GE MFAC 34

Temporary short circuit
Generator
Isolating
links
A
B
C
V 87 87 87
87 Generator differential relay
V
V oltmeter
Figure 5 Testing sensitivity of generator differential protection using generator to supply
primary current.
Generator
Isolating
links
Temporary short circuit
A
B
C
A2 A2 A2
87 87 87
87 Generator differential relay
A2
Ammeter
Figure 6 Checking stability of generator differential protection.
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