25
2
Table 2-8 Reset time (230V)
Type Overcurrent trip device Reset time (Minute)
MCCB ELCB (Reference) With overload current
tripping
(200% of current)
With short-circuit current
(Icu) breaking
BW32AAG, SAG
BW50AAG, EAG, SAG, RAG
BW63EAG, SAG, RAG
BW100AAG, EAG
EW32AAG, EAG, SAG
EW50AAG, EAG, SAG, RAG
EW63EAG, SAG, RAG
EW100AAG, EAG
Hydoraulic-magnetic Immediately Immediately
BW50HAG
BW125JAG, RAG, HAG
BW250EAG, JAG, RAG, HAG
EW50HAG
EW125JAG, RAG, HAG
EW250EAG, JAG, RAG, HAG
Thermal-magnetic 1 2
BW400EAG, SAG, RAG, HAG
BW630EAG, RAG, HAG
BW800EAG, RAG, HAG
EW400EAG, SAG, RAG, HAG
EW630EAG, RAG, HAG
EW800EAG, RAG, HAG
Thermal-magnetic 2 2
BX100
BX160
BX250
BX400
BX630
BX800
BX1000 BW1000RAE
BX1250 BW1250RAE
BX1600 BW1600RAE
− Electronic Immediately Immediately
type breakers, on the other hand, can be reset immediately
after tripping. It takes the plunger a few minutes to return to its
normal position, however, which means that trip characteristics
will not be as specified for a short amount of time. The
operating time is virtually the same with massive current, such
as with instantaneous tripping, because the plunger hardly
moves in those situations. Table 2-8 shows breaker reset
times.
2-2-4 Reset time
The reset time is the time it takes the trip device in a breaker
to return to its normal operating condition after breaking
automatically. With thermal-magnetic types, the directly heated
type used in small-frame products takes a minute or so to
reset while the indirectly heated type takes slightly longer. The
two types function virtually identically with significant current,
such as with short-circuit current breaking. Hydraulic-magnetic
Operating characteristics and performance
2-2 Breaking performance
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