Products - CHINA·LONGXI ELECTRIC CO.,LTD.

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ZW32F-12Y Outdoor HV AC Pole-mounting Permanent Magnet Vacuum Circuit Breaker Type Sectionalizer

Summary

ZW32F-12Y outdoor HV AC pole-mounted permanent magnet vacuum circuit breaker type sectionalizer is used in the outdoor power distribution system with rated voltage 12kV, three-phase AC 50/60Hz. It is applicable to substations, industrial and mining enterprises, especially to rural electric power networks and the occasions with frequent operation for power network control and equipment protection. The sectionalizer is mainly composed of ZW43-12Y vacuum circuit breaker, an intelligent controller and a built-out voltage transformer (PT). These three parts are electrically connected together by aerial sockets and outdoor sealed control cables. It has the functions of fault detection, protection & control and communication. It can reliably judge and detect MA level zero sequence current in boundary 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: ≤2000m;
2. Ambient temperature: -40℃～+45℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s (wind pressure ≤700Pa);
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%. Dew may be condensed in the interior of the tank body when high humidity drop rapidly;
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 Insulation level	1min P.F withstand voltage	Dry test		42/48(isolating distance)
			Wet test		34
			Auxiliary loop and control loop		2
		Lightning impulse withstand voltage(peak)			75/85(isolating distance)
3	Rated frequency			Hz	50/60
4	Rated current			A	630, 1000, 1250
5	Rated short-circuit breaking current			kA	16	20	25
6	Rated short-circuit making current(peak)				40	50	63
7	Rated peak withstand current(peak)				40	50	63
8	Rated short-time withstand current(4s)				16	20	25
9	Rated short-circuit duration			s	4
10	Making times of rated short-circuit making current			times	30
11	Closing time			ms	≤50
12	Opening time				≤60
13	Complete breaking time				≤100
14	Arcing time				≤50
15	Average opening speed			m/s	1.2±0.2
16	Average closing speed				0.6±0.2
17	Contact close-bouncing time			ms	≤2
18	Three-phase opening non-simultaneity				≤2
19	Allowed accumulative wear thickness for moving and static contacts			mm	3
20	Contact self-closing pressure			N	2000±200
21	Rated operating voltage /rated auxiliary loop voltage			V	DC/AC 220
22	Charging time under rated voltage			s	≤8
23	DC resistance for each phase loop(with isolator)			μΩ	≤80(120 with isolator)
24	Phase-to-phase spacing			mm	280±1.5
25	Mechanical life			times	10000
26	Net weight			kg	105(135 with isolator)

Technical parameter for P.M operating mechanism

No.	Item		Unit	Data
	DC operating power supply, coil short-time duty			CDY-I	CDY-Ⅱ	CDY-Ⅲ
1	220V closing/opening coil	Calculating current	A	53	70	100
		resistance(20℃	Ω	4.2±0.2	3.2±0.17	2.2±0.12
2	Applicable to sectionalizer’s spec.			16kA	20kA	25kA
3	Power supply voltage			AC 220V

Main function features

1. When the fault occurs in T shape branch line junction of 10kV overhead distribution line, or occurs in the inside of end users, and if the fault occurs in the incoming line for feeder switch, or although the fault occurs in the inside of user line switch, all these faults will cause the protection tripping of the outgoing line switch for substation due to ill-timed coordination between the protective action time limit for feeder switch or user line switch and the protective action time limit for the outgoing line switch for substation. If the fault is permanent, and reclosing substation is not successive, an accident occurs in a medium voltage user community will make the whole distribution line outage. This common accident in the power distribution network will cause vicious influence to the society.
2. If a user boundary switch(commonly known as watchdog) is installed in T shape branch line junction or user end(duty boundary point), it can confirm the faults of overcurrent or short-circuit or single-phase grounding after judging and automatically isolate the faults to ensure the safe usage of the electricity in non-fault zone.

Outline and installation dimension