Specifications

14
COMPACT
®
NS circuit breaker
Switches
COMPACT
®
NS circuit breaker: functions and characteristics
E28017
p
u
s
h
to
tr
i
p
Ratings and interrupting ratings
Short-circuit withstand current
Molded case switches are identical to molded case circuit breakers, except that they
are not equipped with trip units and sensors.
These switches open instantaneously at a non-adjustable, factory preset, magnetic
trip point calibrated to protect only the molded case switch itself. (magnetic settings:
NSF150/250 A switches: 2000 A; NSJ 400/600 A switches: 6000 A).
When protected by any protective device, these switches are suitable for use on a
circuit capable of delivering not more than:
■ 240 V: 100 kA for NSF switches and 150 kA for NSJ switches;
■ 480 V: 65 kA for NSF switches and 100 kA for NSJ switches;
■ 600 V (600Y/347 for NSF switches): 25 kA.
Switches are Listed under UL file E103740 and Certified under CSA file LR 88980.
Molded case switches are automatic and open instantaneously at a factory preset
magnetic trip point of:
■ 2000 A for NSF150A and NSF250A switches;
■ 6000 A for NSJ400A and NSJ600A switches.
Molded case switches are calibrated to protect only the molded case switch itself
when subjected to high fault currents. The trip point is non-adjustable and provides
no overload protection.
Molded case switches open when the handle is switched to the OFF position or in
response to an auxiliary tripping device such as a shunt trip or an undervoltage
release.
UL 1087 Listed ratings
COMPACT
®
switches
Number of poles
Rated voltage (V) AC 50/60 Hz
Rated current (A)
IEC 947-3 ratings
COMPACT
®
switches
Number of poles
Rated insulation voltage (V) Ui
Rated impulse withstand voltage (kV) Uimp
Rated operational voltage (V) Ue AC 50/60 Hz
DC
Rated operational current (V) Ie AC23A 690 V
DC23A 250 V
DC23A 500 V (2 poles in series)
Making capacity (kA peak)
Short-time withstand current (kA rms) Icw Icw (kA rms)
duration (s)