ZW32-12 Series Outdoor AC High Voltage Vacuum Circuit Breaker

Our ZW32-12 outdoor vacuum circuit breakers are compact, maintenance-free distribution solutions for 12kV power systems, featuring anti-condensation design for harsh climatic and polluted environments.

• Rated at 12kV, 630A, with 20kA short-circuit breaking and 50kA making current.

• Mechanical life of 10,000 operations with ≥30 short-circuit breaking operations for reliable performance.

• Compact size, light weight, and maintenance-free operation with anti-condensation design.

• Available with isolating function (G) and manual or electric operation options.

• Power frequency withstand voltage of 42/48kV and lightning impulse withstand of 75/85kV.

• Fast delivery, reliable quality, responsive service, and extensive project experience backed by our company.

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Product Overview

The ZW32-12 outdoor AC high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor distribution equipment with a rated voltage of 12 kV and three-phase AC 50 Hz. It is primarily used for making and breaking load currents, overload currents, and short-circuit currents in power systems. It is suitable for protection and control applications in substations and industrial power distribution systems, as well as in rural power networks where frequent operation is required.

This circuit breaker features compact size, light weight, anti-condensation design, and maintenance-free operation, enabling it to adapt to harsh climatic conditions and polluted environments.

Technical Specifications

S.Q.	Name	Unit	Data
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50
3	Rated Current	A	630
4	Rated Short-Circuit Breaking Current	kA	20
5	Rated Peak Withstand Current (Peak)	KA	50
6	Rated Short-Time Withstand Current	kA	20
7	Rated Short-Circuit Making Current (Peak)	kA	50
8	Mechanical Life	times	10000
9	Rated Number of Short-Circuit Breaking Operations	times	≥30
10	Power Frequency Withstand Voltage (1min): (Wet)(Dry) Phase-to-Phase, Phase-to-Earth / Across Isolating Distance	kV	42/48
11	Lightning Impulse Withstand Voltage (Peak) Phase-to-Phase, Phase-to-Earth / Across Isolating Distance	kV	75/85
12	Power Frequency Withstand Voltage (1min) for Secondary Circuits	kV	2

Model and Designation

ZW 32 - 12 / T 630 - 20 G - □

ZW: Outdoor Vacuum Circuit Breaker

32: Design Serial Number

12: Rated Voltage (kV)

T: Spring Operating Mechanism

630: Rated Current (A)

20: Rated Short-Circuit Breaking Current (kA)

G: With Isolating Function

□: S - Manual Operation, D - Electric Operation

Normal Service Conditions

1. Ambient Temperature: -40℃ to +40℃.

2. Altitude: Not exceeding 2000 m. For altitudes above 2000 m, consult the manufacturer.

3. Wind Pressure: Not exceeding 700 Pa (equivalent to a wind speed of 34 m/s).

4. Relative Humidity: Daily average not exceeding 95%; Monthly average not exceeding 90%.

5. Degree of Atmospheric Pollution:

6. Ambient Air: Should not be significantly polluted by corrosive or flammable gases. No frequent severe vibration.

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