NHR40 Fuse-switch Disconnector
1.1 NHR40 series switch-disconnector with fuse is applicable in the circuit of AC50Hz, rated voltage AC690V and below, DC440V and below, rated current up to 630A.
NHR40 series are infrequently manually operated multipolar fuse combination switches,
They break or switch off on load and provide safely isolation and protection against overcurrent for any voltage electrical circuit.
1.2 Standard: IEC/EN 60947-3.
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Control electric circuits.
Protect people against indirect contacts and additional protection against direct contacts.
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protection of circuits against short-circuit currentsprotection of circuits against overload currents,switch,isolation,
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Technical data of the network at the point consideredshort-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,
Network normal voltage.
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Rated residual operating current
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Tripping curve
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Electromagnetic release type: B, C, D;
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protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
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1.2 Selection
Technical data of the network at the point considered: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:
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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),
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Tripping curves:
B curve (3-5In)
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