NVW2-12Y1250-25 (12kV), Outdoor Type
Application: for making and breaking load current, overload current and short-circuit current in 12kV AC50Hz power system, protecting and controlling of substation and equipments.
Standards: IEC 62271-100
Parameters: Rated voltage: 12kV.
Rated current: 630-1250A.
Rated short-circuit breaking current: 20kA,25kA.
Features: 1.Compact design and light in weight.
2.Enclosed construction can realize anti-dust and anti-moisture.
3.Maintenance-free.
4.Both manual and electric power operation and remote control.
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Mechanical life: 20000 cycles;
Electrical life: 6000 cycles (In≤100A); 4000 cycles (In＞100A);
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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.
Residual current circuit breakers are used in housing, tertiary sector and industry.
1.2 Selection
Detectable wave form
Type B
Tripping is ensured for sinusoidal AC residual currents pulsed DC residual currents, alternating residual sinusoidal currents up to 1000Hz, pulsating direct residual currents and for smooth direct residual currents, whether applied suddenly or increasing slowly.
Tripping sensitivity
30mA - additional protection against direct contact.
100mA - co-ordinated with the earth system according to the formula IΔn＜50/R, to provide protection against indirect contacts;
300mA - protection against indirect contacts, as well as fire hazard.
Tripping time
Instantaneous
It ensures instantaneous tripping (without time-delay).
1.3 Approvals and certificates CE, KEMA
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AX-5 auxiliary contacts
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1.1 Function
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.
I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.
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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