GE MFAC 14

2.2.7 Stability check by primary injection
Restricted earth fault
Phases
Primary current (A1)
Spill current (A2)
A – N
B– N
C – N
Circulating current between two or more sets of current transformers.
Phases
Primary current (A1)
Spill current (A2)
A1 – A2
B1 – B2
C1–C2
Where more than two sets of current transformers are involved, injection should
be carried out between set 1 and each other set in turn.
Commissioning Engineer Customer Witness
Date Date
22