How To Set Current Rating, Trip Characteristic, Sensitive Current And Operating Time; Cautionary Instructions For Setting; How To Set Characteristics Of Molded-Case Circuit Breakers [Electronic Overcurrent Tripping Type] - Mitsubishi Electric C Series Handling And Maintenance

2.3 How to set current rating, trip characteristic, sensitive current and oper-
ating time

2.3.1 Cautionary instructions for setting

Let a person having technical knowledge of electricity set the breaker.
●
Before setting, turn off the upper circuit breaker, or turn off the circuit breaker to be set or trip
●
the breaker, then make sure of no current conducting.
Otherwise, electrification can result.
Procedure 2: With a detector, make
sure of no current conducting.
2.3.2 How to set characteristics of molded-case circuit breakers [electronic overcurrent
tripping type]
Applicable
NF125-SGW(RE), NF125-HGW(RE), NF160-SGW(RE)
model
NF160-HGW(RE), NF250-SGW(RE), NF250-HGW(RE)
Layout of
Trip (PTT)
setting dials
button
CAUTION
Group A
70％LED (green)
PAL LED (yellow)
OVER LED (red)
Setting dial
Button cover
Procedure 1: Turn off the upper
circuit breaker.
Circuit breaker to be set
Group B
NF400-SEW, NF400-HEW, NF400-REW, NF400-UEW
NF630-SEW, NF630-HEW, NF630-REW, NF800-CEW,
NF800-SEW, NF800-HEW, NF800-REW, NF800-UEW
NF1000-SEW, NF1250-SEW, NF1600-SEW
Rated current label
OVER LED (red)
Trip
PAL LED (yellow)
(PTT) button
70% LED (green)
Replacement label
Cover
Setting dial
Connection cover
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