NQ3 Series DOL Electromagnetic Starter
1.1 NQ3 series electromagnetic starter ( “starter” for short hereinafter) applies mainly to circuit with AC current of 50Hz (or 60Hz), rated operational voltage of 660V and rated controlled power up to 11kW (current up to 22A) for using to control the direct start and halt of the electromotor to protect the motor from overload and phase failure.
1.2 The starter conforms to standards IEC/EN60947-4-1
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1.2 Selection
Rated residual operating current
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Control electric circuits.
Protect people against indirect contacts and additional protection against direct contacts.
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1.3 Approvals and certificates CE, KEMA
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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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protection for people and big length cables in TN and IT systems.
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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.
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Personnel and fire protection
Cable and line protection against overload and short-circuits.
1.2 Selection
I∆n ≤ 30 mA: additional protection in the case of direct contact.
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AC class – Tripping is ensured for sinusoidal,alternating currents, whether they be quickly applied or slowly increase.
1.3 Approvals and certificates
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1.1 Function
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.
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B curve (3-5In)
protection for people and big length cables in TN and IT
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D curve(10-20In)
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