Description
2.6 Protection system
3VA molded case circuit breakers with IEC certificate
78 Manual, 03/2019, A5E03603177010-03
For 4-pole molded case circuit breakers, the fourth current transformer is internally installed
for the neutral conductor.
4-pole molded case circuit breaker in unbalanced systems:
3VA trip unit variants, 4-pole 3VA2
● ETUs 3-series: ETU330 (LIG)
● ETUs 5-series: ETU560 (LSIG)
● ETUs 8-series: ETU860 (LSIG)
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