Figure. 5.3.9 - 117. Cable end differential with natural unbalance in the phase current measurement.
When calculating residual current from the phase currents, the natural unbalance can be around 10 %
while the used CTs are still within the promised 5P class (which is probably the most common CT
accuracy class). When the current natural unbalance is compensated in this situation, the differential
settings may be set to be more sensitive and the natural unbalance does not, therefore, affect the
calculation.
A
AQ
Q-F205
-F205
Instruction manual
Version: 2.04
162
© Arcteq Relays Ltd
IM00013
Summary of Contents for AQ F205
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