Applications
3.3 Motor protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
157
Instantaneous short-circuit protection I
i
Short-circuit protection I
i
is permanently set to the highest possible value.
Phase unbalance / phase failure:
•
I
unbal
of current mean value permanently set to 40%
•
I
unbal
tripping time during startup permanently set to 0.7 s
•
I
unbal
tripping time during normal operation permanently set to 4 s
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