KYN28A-24(Z) Metalclad AC Enclosed Switchgear
Application: In 3.6~24kV power system for control, protection and monitoring.VCBs produced by CHINT or VCBs produced by other manufacturers could be installed in the switchgear panel.
Standards: IEC 62271-200
Parameters: Rated voltage: 24kV.
Rated current: 630-3150A.
Rated short-circuit breaking current: 16-31.5kA.
Features: 1.KEMA certified.
2.Compact design.
3.Easy operation and installation.
4.Reliable interlock.
5.Less Maintenance.
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Frequency: 50Hz;
Electromagnetic release type: B, C, D;
Number of poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P;
Mechanical life: 20000 cycles;
Electrical life: 10000 cycles;
Rated short-circuit breaking capacity: 10000A;
Short-circuit breaking capacity: 7500A;
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1.1 Function
Personnel and fire protection: Cable and line protection against overload and short-circuits.
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Rated residual operating current
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I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.
Tripping class
AC class
Tripping is ensured for sinusoidal,alternating currents, whether they be quickly applied or slowly increase.
A class
Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be quickly applied or slowly increase.
Tripping curve
B curve (3-5 In) protection and control of the circuits against overloads and short-circuits; protection for people and big length cables in TN and IT systems.
C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.
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.
Tripping curves:
B curve (3-5In)
protection for people and big length cables in TN and IT systems.
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1.3 Approvals and certificates
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1.1 Function
Control electric circuits.
Protect people against indirect contacts and additional protection against direct contacts.
Protect installations against fire hazard due to insulation faults.
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Detectable wave form
AC class
Tripping is ensured for slowly increasing sinusoidal AC residual currents.
A class
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S, G/SI class
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Frequency: 50Hz;
Electromagnetic release type: B, C, D;
Number of poles: 1P, 2P, 3P, 4P;
Mechanical life: 20000 cycles;
Electrical life: 6000 cycles (In≤100A); 4000 cycles (In＞100A);
Rated short-circuit breaking capacity(Icn): 10000A;
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