ZW8-12 Outdoor High Voltage Vacuum Circuit Breaker

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Product Detail

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Overview

ZW8-12 outdoor high-voltage vacuum circuit breaker, three-phase AC 50Hz outdoor high-voltage switchgear. It is composed of operation, conductive circuit, insulation system, seal and shell, and the overall structure is three-phase common box type. It is used for 10kV rural power grid and urban power grid power system, as split, combined load current, overload current, short-circuit current and other similar places.
Implement the standard GB1984-2003 "High Voltage AC Circuit Breaker" GB/T11022-1999 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards" IEC62271-100 "High Voltage AC Circuit Breaker"

Normal Use Conditions

◆Ambient temperature: -40℃~+40℃;
◆Altitude: ≤3000m (if the altitude increases, the rated insulation level will increase accordingly);
◆The surrounding air can be polluted by dust, smoke, corrosive gas, steam or salt spray, and the pollution level is IV;
◆The wind speed does not exceed 34m/s (equivalent to 700Pa on the cylindrical surface);
◆Vibration or ground motion from outside of switchgear and control equipment can be ignored;
◆Special conditions of use. (If you need to apply it under normal conditions of use different from the above, please negotiate with us).

The Main Technical Parameters

Serial number	Name		Unit	Data
1	Rated voltage		kV	12
2	Rated current		A	630 1250
3	Power frequency dry withstand voltage (1min)		kV	42
4	Lightning impulse withstand voltage (peak)			75
5	Rated short-circuit breaking current		kA	16 20 25
6	Rated short-circuit making current			40 50 63
7	Rated peak withstand current		kA	40 50 63
8	4s short-time withstand current			16 20 25
9	Nominal Operation Sequence			Points-0.3s-Combined points-18Os-Combined points
10	Rated short-circuit current breaking times		times	30 10000
11	Mechanical life
	Rated voltage of energy storage motor		times
12	Rated operating voltage Opening coil		V	DCorAC 220
	Equipped with special spring operating mechanism Closing coil		V	DCorAC 220
13	Rated current of overcurrent release		A	5
14	Allowable wear thickness of static and dynamic contacts		mm	3
15	Contact Spacing		mm	11±1
16	Overtravel (contact spring compression length)		mm	+1.0 -0.3
17	Three-pole closing and opening of different periods		ms	≤2
18	Contact closing bounce time		ms	≤2
19	Average opening speed		m/s	1.0±0.2
20	Average closing speed		m/s	0.7±0.15
21	Opening time	at the highest operating voltage	s	0.015-0.05
		at minimum operating voltage	s	0.03-0.06
22	when closing		s	0.025-0.05
23	Main circuit resistance		μΩ	≤120(with G≤200)