Figure. 5.3.10 - 123. Restricted earth fault outside a Y winding transformer.
If the fault is located inside of the transformer and thus inside of the protection area, the function
catches the fault with high sensitivity. Since the measured residual current now flows in the opposite
direction than in the outside fault situation, the measured differential current is high.
A
AQ
Q-F215
-F215
Instruction manual
Version: 2.04
176