Products - CHINA·LONGXI ELECTRIC CO.,LTD.

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Products

ZW43SG-12 Outdoor HV AC Double-isolating Type Intelligent Vacuum Circuit Breaker

Summary

ZW43SG-12 outdoor HV AC double-isolating type intellighent vacuum circuit breaker is used to make and break load current, overload current and short-circuit current in the power system with rated voltage 12kV, three-phase AC 50/60Hz. The product is composed of a vacuum circuit breaker, an intelligent controller and a built-out PT. It is applicable to substations, industrial and mining enterprises, unban and rural electric power networks, especially to those serious pollution environment and frequent operation places for power network control and equipment protection. The product conforms to the standards of IEC62271-100 & GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022: HV general technical requirement of switch and control apparatus.

Ambient conditions

1. Altitude: ≤2000m;
2. Ambient temperature: -40℃～+45℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s, equivalent to wind pressure of 700Pa;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Sunlight intensity: ≤1000W/m2
8. Pollution degree: ≤Ⅳ(GB5582);
9. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration

Model

Technical specification

No.	Item		Unit	Data
1	Rated voltage		kV	12
2	Rated current		A	630
3	Rated frequency		Hz	50/60
4	Rated short-circuit breaking current		kA	20
5	Rated short-time withstand current(4s)			20
6	Rated peak withstand current(peak)			50
7	Rated short-circuit making current(peak)			50
8	1min P.F withstand volage	Wet test	kV	34
		Phase to phase,phase to earth		42
		Across open contacts		48
9	Lightning impulse withstand voltage(peak)	Phase to phase,phase to earth	kV	75
		Across open contacts		85
10	1min P.F withstand voltage for secondary loop		kV	2
11	Breaking times of rated current		times	1000
12	Breaking times of rated short-circuit current			30
13	Mechnical life			10000
14	Opening speed		m/s	1.2±0.2
15	Closing speed			0.6±0.2
16	Closing time		ms	25~60
17	Opening time			18~45
18	Contact close-bouncing time			≤2
19	Rated power for energy storage motor		W	40
20	Three-phase opening/closing non-simultaneity		ms	≤2
21	Resistance for each phase conductive loop	Switch body	μΩ	≤80
		Disconnect blade		Single side≤120、double sides≤200
22	Phase-to-phase spacing		mm	280±1.5
23	Net weight		kg	165

Main function features

1. The performance of the product is stable and reliable as the product adopts three-pillar type structure, and the vacuum arc-extinguishing chamber connects with the operating mechanism through insulation pulling rod;
2. Arc-extinguishing chamber, main conducting loop and insulation support are casted into an organic whole by epoxy resin with APG technology, and encapsulated with silicon rubber, it is provided with good anti-condensation performance and mechanical strength.
3. The switch adopts a high performance spring operating mechanism with the advantages of simple structure and long mechanical life, and with the functions of manual/electric energy storage and opening/closing operation.
4. The product has the advantages of small size, novel appearance, light weight and easy installation.
5. The switch can be equipped with control terminal interface to apply to automation distributiong networks and the unattended substations.

Outline and installation dimension