Product Overview

ZW20-12 outdoor high-voltage AC vacuum circuit breaker is an outdoor high-voltage switchgear with rated voltage 12/24kV, three-phase AC 50Hz. This circuit breaker is a maintenance-free product with excellent electrical and mechanical properties, making the ZW20 outdoor vacuum circuit breaker widely used. It is mainly used to break and close the load current and short-circuit current of the 10kV power system. It is suitable for protection and control in substations as well as industrial and mining enterprise power distribution systems. It is also suitable for places with frequent power grid operations. This product is matched with the controller to meet the requirements of the power distribution automation system.

Technical Parameters

Item	Unit	Value
Rated voltage	kV	12
1min power frequency resistance Voltage (phase to phase, ground/fracture)	kV	42/48
Lightning impulse withstand voltage (phase to phase, ground/fracture)	kV	75/85
Rated current	A	630, 1250
Rated frequency	Hz	50
Rated short-circuit breaking current	kA	20, 25
Rated short-circuit closing current (peak)	kA	50, 63
Rated peak withstand current	kA	50, 63
Rated short-time withstand current	kA	20, 25
Rated short-term withstand time	s	4
Rated operating cycle		O-0.3s-CO-180s-CO
Rated short-circuit current breaking times	times	30
Mechanical life	times	10000
Rated operating voltage of auxiliary circuit	V	DC24

Note: When the altitude of the product use site is higher than 2000m, the insulation withstand voltage should be corrected accordingly.

Features

1

Reliable sealing performance: It has mature sealing shell technology and IP67 protection level. The shell is processed by mold stretching and one-time molding process. It is easy to seal the box, has high air tightness and high mechanical strength.

2

Excellent breaking performance: breaking short-circuit current 25kA up to 30 times

3

Flexible installation method: can be mounted on a pole or mounted on a seat

4

It has maintenance-free characteristics: the main circuit of the circuit breaker, secondary components, and operating mechanism are all sealed in SF6 gas (zero gauge pressure, not affected by the external environment, stable and reliable performance, and excellent insulation performance of maintenance-free incoming and outgoing lines)

5

Excellent insulation performance: the incoming and outgoing line casings are cast using epoxy resin and silicone rubber APG process, with a phase spacing of 280m

6

Optional integrated isolation knife gate

Product usage environment

Ambient air temperature: -40℃~+70℃

Altitude: Not exceeding 2000m

Installation location: A place free of flammable, explosive, chemically corrosive substances and frequent severe vibration

Safety pollution level: IV level

Wind pressure: no more than 700Pa (equivalent to wind speed 35m/s)

Note: When the above usage environment conditions are exceeded, please contact us