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

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


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
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

1  Vacuum Circuit Breaker Series
2  Outdoor Load Break Switch Series
3  Intelligent Automation Equipment For Power Grid
4  Outdoor AC High Voltage Disconnect Switdh Series
5  Indoor Load Break Switch Series
6  Indoor AC High Voltage Disconnect Switch Series
7  Insulator Series
8  Drop-out Type Fuse Series
9  Arresters
10  hot stick/insulated rod/operating rod
11  Ground set/earth rod equipment
12  ground wire,grounding clamp
13  copper rod /brass rod
14  electroscope/ detector
15  lineman safety belt
16  pole climber
17  safety shoes boots ,hand gloves,carpet, mask
18  safety helmet
19  cable wire grip
20  fiber ledder , meter seal
21  hydraulic and electric crimping tool
22  Guy guard
23  snatch block
24  discharge rod lighten rod
25  cable cutter
26  puller and hand winch
27  crimping pliers and press pliers
28  Ungrouped
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Tel: 0086-577-62890982  Fax: 0086-577-62890992  E-mail:hongxiu4@gmail.com  Add: Fangdouyan zone, Liushi, Yueqing City, Zhejiang, China. 325600