Breaker Arrangements - Mitsubishi Electric C Series Handling And Maintenance

3.6.7 Breaker arrangements

(1) Connection of no-fuse breaker
1 1
1 1 Inverse connection 1
The illustration (a) is the standard connecting arrangement of line and load of the breaker termi-
nals.
Except for the models which accept inverse connection, connection of (b) may lower breaking
performance and inverse connection isn't advisable.
When connected inversely, indication shall be made for line side
and load side.
Models
which
Except for breaker
accept
with MDU
inverse
connection
2 2 2 Electronic circuit breaker 2 2
When 3-pole circuit breakers are used for single phase 2-wire lines, connect correctly in the
manner illustrated below. Otherwise, overcurrent fails operation and causes fire.
Load
Correct method
of connection
(a) Connection method of A
This connection may be acceptable only when carrying out the temperature-rise test in
the acceptance test. Please never use this connection in any actual applications.
(b) Connection method of B or C
Please never use this connection in any actual use. Since the temperature-rise of the
internal electronic circuit and the breaking performance are not guaranteed.
CAUTION
BH BH-P
NF32-SW NF63-CW
NF125-SGW NF125-HW
NF160-SGW NF160-HW
NF250-HW NF250-HGW
MB30-SW MB50-CW
NF400-CW NF400-SW
NF630-CW NF630-SW
NF800-CEW NF800-SDW
NF1000-SEW NF1000-SDW
NF1600-SDW NF2000-S
NV400-CW NV400-SW
NV630-CW NV630-SW
DSN63-CW DSN125-CW
DSN63-SW DSN125-SW
DSN400-SW DSN630-SW
DSN2000-S DSN2500-S
CAUTION
Load
Connection
method of A
BH-S BH-PS
NF63-SW NF63-HW
NF125-HGW NF125-RGW
NF160-HGW NF250-CW
NF250-RGW NF250-UGW
MB50-SW MB100-SW
NF400-SEW NF400-HEW
NF630-SEW NF630-HEW
NF800-SEW NF800-HEW
NF1250-SEW NF1250-SDW
NF2500-S NF3200-S
NV400-SEW NV400-HEW
NV630-SEW NV630-HEW
DSN250-CW DSN30-SW
DSN250-SW DSN400-CW
DSN800-SW DSN1000-SEW
DSN3200-S DSN4000-S
Load
Connection
method of B
Line Load
(a) Normal (b) Inverse
connection connection
CP30-BA
NF125-CW NF125-SW
NF125-UGW NF160-SW
NF250-SW NF250-SGW
MB225-SW
NF400-REW NF400-UEW
NF630-REW
NF800-REW NF800-UEW
NF1600-SEW
NF4000-S
NV400-REW
NV800-SEW NV800-HEW
DSN50-SW
DSN630-CW DSN800-CW
DSN1250-SW DSN1600-SW
Load
Connection
method of C
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