KYN28A-12(Z) Metalclad AC Enclosed Switchgear
Application: In 3.6~12kV 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: 3.6-12kV.
Rated current: 630-5000A.
Rated short-circuit breaking current: 16-50kA.
Features: 1.Compact design.
2.Easy operation and installation.
3.Reliable interlock.
4.Less Maintenance.
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Rated voltage: 240V ~ (1P), 415V ~ (2P, 3P, 4P);
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);
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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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Personnel and fire protection: Cable and line protection against overload and short-circuits.
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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
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Mechanical life: 20000 cycles;
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1.1 Function
protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
NB1 circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems.
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:
B curve (3-5In)
protection for people and big length cables in TN and IT systems.
C curve (5-10In)
protection for resistive and inductive loads with low inrushcurrent.
D curve(10-14In)
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1.3 Approvals and certificates
Detailed information, please refer to Certificates Table on the last page.
