Products - CHINA·LONGXI ELECTRIC CO.,LTD.

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Products

ZWHF-12 Outdoor HV AC Vacuum Circuit Breaker Type Sectionalizer

Summary

ZWHF-12 outdoor HV AC vacuum circuit breaker type sectionalizer (hereinafter referred to as the sectionalizer) is a new multifunctional intelligent device which is mainly assembled by three parts of a vacuum circuit breaker, a CH-40 controller and external (or built-in) voltage transformer (Note: bilateral PT can be chosen to use in distribution automation line ring network), so as it has the funtions of vacuum circuit breaker, vacuum load break switch, recloser and sectionalizer. The sectionalizer is widely used in overhead ring network line for unban and rural electric distribution networks with rated voltage 12kV as the sectionalzing disconnect switch, interconnection switch, automatic switch device which can implement the ring deployment line load. It can be used as a sectionalized switch (commonly known as a watchdog) in the branch line of power supply, used as a recloser and a sectionalizer in feed overhead distribution network. The sectionalizer has remote management mode, and has the functions of protection & control and communication. It can reliably judge and detect MA level zero-sequence current and short-circuit fault current between phases to remove automatically the single-phase grounding fault and short-circuit fault between phases. 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: ≤3000m;
2. Ambient temperature: -30℃～+45℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Pollution degree: ≤Ⅳ(GB5582);
8. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration.

Model

Technical specification

No.	Item		Unit	Data
1	Rated value	Rated voltage	kV	12
		Rated frequency	Hz	5/60
		Rated current	A	630
		Rated withstand current(peak)	kA	50
		Rated short-time withstand current(4s)		20
		Rated short-circuit making current(peak)		50
		Breaking times of rated current	times	1000
		Making times of rated short-circuit breaking current		30
2	1min P.F withstand current	Phase to phase, phase to earth	kV	42
		Across open contacts		48
		Secondary loop withstand voltage		2
3	Lightning impulse withstand voltage (peak)	Phase to phase, phase to earth		75
		Across open contacts		85
4	Opening speed		m/s	1.2±0.2
5	Closing speed			0.8±0.2
6	Closing time		ms	20~60
7	Opening time			18~45
8	Contact close-boucing time			≤2
9	Three-phase opening/closing non-simultaneity			≤2
10	Resistance for each phase conductive loop		μΩ	≤120
11	Rated power for energy storage motor		W	≯40
12	Rated voltage for energy storage motor		V	DC24/DC220
13	Rated close-operating voltage			DC24/DC220
14	Rated open-operating voltage			DC24/DC220
15	Rated gauge pressure of SF6 gas(gauge pressure)		MPa	“0”
16	External creepage distance		cm/kV	3.8±2
17	External charged air insulation distance		mm	240±2
18	Phase-to-phase spacing			135±1.5
19	Mechanical life		times	10000
20	Net weight		kg	145

Main function features

1. Reliable sealing performance with IP67 Protection Level: The mature sealing technoloty assures reliable sealing performance. The shell is processed by die drawing once-shaping technology, so it’s easy for the case sealing with high air tightness and high mechanical strength.
2. Excellent breaking capability: To break the short-circuit current can be up to 25kA with 30 times.
3. Free maintainance: The main loop of circuit breaker, the secondary component and the operation mechanisn are all sealed in SF6 gas (zero gauge pressure), so they are not affected by the external environment, and have stable & reliable performance as well as the advantage of free maintianance.
4. Good performance of incoming and outgoing line: The switch adopt liquid silicon rubber corner bushing to make the distance between phases up to 280mm and ensure good performance of external insulation.
5. Safe usage: Anti-explosive device mounted on the top of box can prevent heated gas or matters from spattering out once the switch fault occurs.

Outline and installation dimension