ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker Made in China - Suppliers and Manufacturers

Product Description

1.Introduction of ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker

ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker (Hereinafter called as circuit break) is an outdoor distribution equipment of rated voltage 12kV, 50Hz AC three-phase. It is mainly used to break or make the load current, over load current and short-circuit current in power system and also is suitable in substations and industrial enterprises for protecting and controlling the distribution systems, especially in countryside electric net and places of frequent operations. This product meets the requirements of rebuilding city and country electric nets.

2. Parameter (Specification) of ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker

2.1 Main technical parameters refer to Table1.
2.2 Mechanical performances refer to Table2.
2.3 Operating mechanism performances refer to Table3.
2.4 Mechanical performances of disconnector refer to Table4.
2.5 Dimensions for outline and installation refers to Fig1.

Table1

Item		Unit	Parameter
Rated voltage		kV	12
Rated frequency		Hz	50
Rated current		A	630
Rated short-circuit breaking current		kA	20
Rated peak withstand current		kA	50
Rated short time withstand current(4s)		kA/s	20
Rated short-circuit making current(peak)		kA	50
Rated operating sequence			O-0.3s-CO-180s-CO
Mechanical life		times	Circuit breaker	10000
			disconnector	2000
Breaking times of rated current		times	10000
Breaking times of rated short-circuit breaking current		times	30
Rated power frequency withstand voltage (1min)	(Wet)Phase to earth	kV	34
	(Dry)Phases to phase, phase to earth /fracture		42/49
Rated Lightning impulse withstand voltage(peak)	Phases to phase, phase to earth /fracture	kV	75/85
Rated power frequency withstand voltage of secondary circuit(1min)		V	2000

Table2

Item	Unit	Parameter
Clearance between open contacts	mm	9±1mm
Contact overtravel	mm	21mm
Opening speed	m/s	1.0±0.2
Closing speed	m/s	0.6±0.2
Closing bounce time	ms	≤3
Central distance between phases	mm	340±1.5
3 phases opening-closing insimultaneity	ms	≤2
Circuit resistance of circuit breaker		﹤80
Closing time	ms	25~60
Opening time	ms	18~45
Rated power of energy storage motor	W	40

Table3

Item	Rated voltage(V)	Rated current(A)	Regular working rage
Opening coil	DC24	7	Reliable working under rated voltage of 65%(DC) or 85%~120%(AC) and don’t work under rated voltage of lower 30%
	DC110	5
	AC220	3.5
	DC220	1.8
Closing coil	DC24	7	Reliable working under rated voltage of 80%(DC) or 85%~110%(AC)
	DC110	5
	AC220	3.5
	DC220	1.8
Overcurrent tirpping coil		5
Energy storage motor	Rated voltage: DC/AC 220V Rated power: 40W		Reliable action under rated voltage of 85%-110%
Energy storage time of closing spring	﹤10s

Table 4

Item	Unit	Parameter
3 phases opening-closing insimultaneity	mm	≤3
Position skew at instant of contacts touching	mm	≤1.5
Clearance between open contacts	mm	﹥200
Positive pressure of contacts	N	200±20
Circuit resistant of circuit breaker(with disconnector)	μΩ	≤180
Manual operating moment of disconnector	N×m	≤120
Isolating distance between phases	mm	200
Isolating distance of conductive circuit to earth	mm	200
Isolating distance of opening contact to earth	mm	200

3. Feature And Application of ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker

ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker uses the latest international design concept and epoxy resin encapsulated silicone rubber APG insulation technology as welll as precision processing technology. The technology is in the domestic
leading level.
The features are as follows:
1.The product adopts three phase pillar structure, compact design, stable and reliable breaking performance, no fire and explosion hazards, maintenance-free, small size, light weight and long service life.
2. The circuit breaker can be equipped with integrated disconnector, and has reliable mechanical interlock between disconnector and circuit breakers, to prevent misoperation.
3. The circuit breaker is fully enclosed structure with good sealing performance, high anti-moisture, anti-condensation propertes specially suitable for cold or wet areas.
4. Three- phase column and CT are adopted imported outdoor epoxy resin solid insulation material casting. It has the features of high temperature resistance, UV resistance, anti-aging characteristics, and it can ensure long-term outdoor safety.
5 The circuit breaker uses the small size spring operation mechanism, low energy consumption during open-close. lts transmission adopts direct drive method, and less open-close parts, high relability. lts operation mechanism is sealed in the mechanical box ,which solves problem of switch parts so as to improve the reliability of circuit breaker.
6. The open-close operation of the circuit breaker can use manual operation, and motor operation. It can be equipped with controller to realize distribution automatization as well as combined with recloser controller as automatic recloser.
7. The ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker can be equipped with two-phase, three- phase and zero-sequence CT to provide data analysis for over current automatic release protection and smart controller.

4.Details of ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker

(1)Service ambient conditions
(2) Altitude above sea level: ≤2000m;
(3) Ambient air temperature: -45℃～+40℃;
(4) Wind speed: ≤35m/s;
(5) Pollution level: Ⅳ grade;
(6) Installation site: No inflammable, explosive danger and chemical corrosion;
(7) Earthquake intensity: ≤8 degree.

5. Product Qualification of ZW 32-12（24）Outdoor HV AC Vacuum Circuit Breaker

GB311.1-1997
GB1984-1989
GB3309-1989
GB/T11022-1999
DL403-1991