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2.5.5 Stability check by primary injection
Restricted earth fault
Phase Primary current A1 Spill current A2
A – N
B – N
C – N
Circulating current between two or more sets of current transformers.
Phase 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
______________________________________ _______________________________________
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