Functions
4.1 Protection functions
3VL IEC molded case circuit breakers
42 System Manual, 11/2013, 110 0110 - 02 DS 03
Further information on ①, ② and ③
Further information for ①, ② and ③ can be found in chapter:
Ground-fault protection (Page 49)
Table 4- 5 Image references for ①, ② and ③
①
Vectorial summation current formation
• "Molded case circuit breaker in balanced systems"
②
Vectorial summation current formation
(4-conductor system)
• "3-
pole molded case circuit breaker, current transformer in neutral
conductor current"
• "4-pole molded case circuit breaker, current transformer installed
internally"
③
Direct recording of the ground-fault current
at the neutral point of the transformer
• "3-pole molded case circuit breaker, current transformer at the
grounded neutral point of the transformer"
Table 4- 6 General data II
2)
2)
2)
2)
2)
2)
2)
2)
3)
3)
SB ETU10 — — 2.5 ... 30 — — ✓ —
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