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China ZW43-12(G)/630-20 Outdoor High-Voltage Vacuum Circuit Breaker - Reliable Suppliers & Factory Options

The ZW43-12(G)/630-20 is a high-performance outdoor permanent magnet vacuum circuit breaker designed specifically for 12kV, 50Hz electrical systems. Ideal for 10kV substations, this advanced circuit breaker effectively handles load, overload, and short-circuit currents. Featuring a single-stable magnetic actuator and an intelligent controller, it offers flexible programming options, exceptional reliability, and enhanced safety measures. Manufactured in China, this product complies with industry standards GB1984-2003, DL/T402-2007, and DL/T403-2000, ensuring robust performance in outdoor environments. As a leading supplier in the industry, our factory guarantees the highest quality and durability of the ZW43-12(G)/630-20 circuit breaker, making it the perfect choice for your electrical needs

Product Details

Technical Specification

No.	Item			Units	Parameters
1	Rated voltage			kV	12
2	Rated insulation level	1min power frequency withstand voltage	Dry test (on the ground, white, fracture)		42/48
			Wet test		34
		Lightning impulse withstand voltage (peak, white / fracture)			75/85
3	Rated current			A	630
4	Rated short circuit breaking current			kA	20
5	Rated operating sequence				O~0.3-CO-180S-COS
6	Rated short-circuit breaking current breaking times			Times	30
7	Rated short-circuit current (peak)			kA	50
8	Rated peak withstand current
9	Rated short time withstand current				20
10	Rated short duration			S	4
11	Sub explain time				0.040~0.060
12	Closing time				0.070~0.120
13	Mechanical life A			Times	10
14	Rated operating voltage closing			V	AC/DC 220/110
15	Rated voltage switching operation				AC/DC 220/110
16	Overcurrent protection	Current setting multiples			0.2~2.5
		Setting current tolerance			±10%
		Delay setting value		S	0~5
		Delay tolerance			±10%
17	Interruption Protection	Current setting multiples			2.5-10
		Setting current tolerance			±10%
		Delay setting value		S	0-0.5
		Delay tolerance			±10%
18	AC charging auxiliary control unit into the current	RATINGS		A	5
		Fluctuation range		A	0.5~8

Product Model

Dimension

Frequently Asked Questions

Q1 What is the rated voltage of this vacuum circuit breaker?

The rated voltage is 12 kV. It is designed for medium-voltage distribution systems and complies with standard insulation level requirements including both dry and wet power frequency withstand voltage tests.

Q2 What is the rated short circuit breaking current and how many times can it break?

The rated short circuit breaking current is 20 kA. The circuit breaker supports up to 30 breaking operations at rated short-circuit breaking current, ensuring reliable protection in fault conditions.

Q3 What control voltages are supported for closing and switching operations?

Both closing and switching operations support AC/DC 220V and AC/DC 110V control voltages, providing flexibility for integration into various substation control systems.

Q4 What are the overcurrent protection settings available?

The overcurrent protection allows a current setting range of 0.2~2.5 times the rated current, with a setting tolerance of ±10%. The delay setting value can be adjusted from 0 to 5 seconds, with a delay tolerance of ±10%.

Q5 What is the mechanical life of this circuit breaker?

The mechanical life (Class A) is 10,000 operations (10 × 10³ times), reflecting the high durability and reliability of the breaker mechanism for long-term service in power distribution applications.

Q6 What is the rated operating sequence for this vacuum circuit breaker?

The rated operating sequence is O ~ 0.3s – CO – 180s – COS, which defines the standard open, close-open, and reclosing cycle intervals, ensuring safe and coordinated operation within protection schemes.