NH40S Changeover Switch
1.1 Application
Mainly used in the distributing and motor circuit which has high short-circuit current,and acted as main switch or master switch
infrequently operated by hand, it is particularly suitable in the relative high class with drawable low voltage complete equipment.
They provide safety isolation and protection against overcurrent for any low voltage electrical circuit.
1.2 Standard: IEC/EN 60947-3.
1.3 General characteristic
Full-enclosed structure
Unique rolling insert type contact system.
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protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
1.2 Selection
Technical data of the network at the point considered:the earthing systems (TNS, TNC),
short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,network normal voltage.
Tripping curves:
B curve (3-5In)
protection for people and big length cables in TN and IT systems.
C curve (5-10In)
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1.3 Approvals and certificates
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Rated residual operating current
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Tripping class
AC class – Tripping is ensured for sinusoidal, alternating currents, whether they be quickly applied or slowly increase.
Tripping curve
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protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
1.2 Selection
Technical data of the network at the point considered:the earthing systems (TNS, TNC),short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,network normal voltage.
1.3 Approvals and certificates
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