Circuit Breaker; Vacuum Circuit Breaker (ZN12)

Model NO.: ZN12

Poles Number: 3

Type: Circuit Breaker

Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)

Certification: VDE, ISO9001-2000, CE, CCC

Trademark: VILLE

Transport Package: Wooden Packing

Specification: Iec

Origin: Ningbo China

ZN12 Indoor AC HV Vacuum Circuit breaker
Base on the technology of Germany Siemens, ZN12-40.5 Indoor AC HV Vacuum Circuit breaker is developed. It is an indoor switchgear used for the power system with 40.5 kV rated voltage, three-phase AC 50 Hz. The circuit breaker is able to be operated frequently and break the false short circuit current for many times. It is not only suitable for trolley switchgear but for fixed switchgear to protect and control the apparatus in industrial and mining field, enterprises, power plant and substation.

Features:
High breaking capability, long endurance. Adopting integration spring operating mechanism, it is simple in structure, small in size and reliable in performance. The main galvanic circle and operating mechanism is in front and back arrangement and they are flexible and easily mounted. It is simple and reliable with mechanical and electrical interlocking. It adopts plateau design and it has good insulation level.

No.	Name	Unit	Technical parameter
1. Â Â Â Â Â Â Â	Rated voltage	KV	40.5
2. Â Â Â Â Â Â Â	Rated current	A	1250,1600,2000,2500
3. Â Â Â Â Â Â Â	Rated short circuit breaking current	Â Â KA Â	25	31.5
4. Â Â Â Â Â Â Â	Peak withstand current		63	80
5. Â Â Â Â Â Â Â	Short time current (4s)		25	31.5
6. Â Â Â Â Â Â Â	Rated short circuit making current		63	80
7. Â Â Â Â Â Â Â	Rated short circuit breaking times	Times	30	30
8. Â Â Â Â Â Â Â	Operating sequence	Â	O-0.3s-CO-180s-CO
9. Â Â Â Â Â Â Â	Lightning impulse withstand voltage	Â KV	185
10. Â Â Â Â	Rated short time power frequency withstandÂ voltage(1min)	Â KV	95
11. Â Â Â Â	Closing time	Â Ms	<=90
12. Â Â Â Â	Opening time	Â Ms	<=70
13. Â Â Â Â	Energy stored time	S	<=15
14. Â Â Â Â	Mechanical endurance	Times	10000
15. Â Â Â Â	Rated current breaking times	Times	10000
16. Â Â Â Â	Energy stored electric machine rated frequency	W	275
17. Â Â Â Â	Energy stored electric machine rated voltage	Â V	DC110Â Â AC/DC220
18. Â Â Â Â	Making electromagnet rated voltage	Â V	DC110Â Â DC220
19. Â Â Â Â	Making electromagnet rated resistance	Â¦Â¸	57.7Â Â 247
20. Â Â Â Â	Making electromagnet rated current	Â A Â	DC1.91Â Â DC0.89
21. Â Â Â Â	Over current release current		5
22. Â Â Â Â	Auxiliary switch rated current		AC10Â Â DC5
23	Contact moving distance	Â Mm	25(+ or -)2
24	Contact travel	Â Mm	8(+ or -)2
25	Closing speed	M/s	1.0 toÂ 1.8
26	Opening speed	M/s	1.0 toÂ 1.8
27	Contact closing bouncing time	Ms	<=2
28	Phase to phase central distance	Mm	350,400,460
29	Asynchronization of making contact	Ms	<=2
30	Each phase main circuit resistance	Â¦ÃŒÂ¦Â¸	<=40
31	Wear thickness allowance of moving contact and static contact	Mm	<=3

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