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Positive contact indication
All Compact NS circuit breakers are suitable for isolation as defined in IEC standard
60947-2:
the isolation position corresponds to the O (OFF) position
b
the operating handle cannot indicate the “OFF” position unless the contacts are
b
effectively open
padlocks may not be installed unless the contacts are open.
b
Installation of a rotary handle or a motor mechanism does not alter the reliability
of the position-indication system.
The isolation function is certified by tests guaranteeing:
the mechanical reliability of the position indication system
b
the absence of leakage currents
b
overvoltage withstand capacity between upstream and downstream connections.
b
Installation in class II switchboards
All Compact NS circuit breakers are class II front face devices. They may be installed
through the door of class II switchboards (as per IEC standard 60664), without
downgrading switchboard insulation. Installation requires no special operations,
even when the circuit breaker is equipped with a rotary handle or a motor
mechanism.
Degree of protection
As per standards IEC 60529 (IP degree of protection) and EN 50102
(IK degree of protection against external mechanical impacts).
Bare circuit breaker with terminal shields
With toggle
IP40 IK07
With direct rotary handle
IP40 IK07
standard / VDE
Circuit breaker installed in a switchboard
With toggle
IP40 IK07
With direct rotary handle
standard / VDE
MCC
CNOMO
IP40 IK07
IP435
IP547
With extended rotary handle
IP55 IK08
DB128019
DB128018
DB128017
DB128016
DB128015
DB401831