ZW43-12 Outdoor High-voltage Vacuum Circuit Breaker

ZW43-12 Outdoor High-voltage Vacuum Circuit Breaker

The ZW43-12(G) type outdoor high-voltage vacuum circuit breaker (hereinafter referred to as the switch) is an outdoor high-voltage switchgear for three-phase AC 50Hz with a rated voltage of 12kV. The switch is mainly used as a 10kV outgoing switch in substations and as a line protection switch in 10kV-level three-phase AC power systems for making or breaking load current, interrupting overload current, and short-circuit current.

Detail

Overview

The circuit breaker complies with technical standards such as GB1984-2003 "High-Voltage AC Circuit Breakers", DL/T402-2007 "Technical Conditions for Ordering High-Voltage AC Circuit Breakers", and DL/T403-2000 "Technical Conditions for Ordering 12kV~40.5kV High-Voltage Vacuum Circuit Breakers".

Model Meaning

Operating Environment

1. Ambient air temperature: upper limit 40℃, lower limit -40℃;

2. Altitude: not exceeding 3000 m;

3. Wind pressure: not exceeding 700 Pa (equivalent to wind speed of 34 m/s);

4. Air pollution level: not exceeding Class IV;

5. Ice thickness: not exceeding 10 mm;

6. No fire, explosion hazard, chemical corrosion, or severe vibration.

Main Technical Parameters

No.	Item			Unit	Parameter
1	Rated Voltage			kV	12
2	Rated Insulation Level	1min Power Frequency Withstand Voltage	Dry test, to ground, between poles/open gap	kV	42/48
			Wet test		34

		Lightning impulse withstand voltage, peak, between poles/open gap			75/85
3	Rated Current			A	630
4	Rated Short-Circuit Breaking Current			kA	20
5	Rated Operating Sequence				O-0.3-CO-180S-CO
6	Rated Short-Circuit Breaking Current Breaking Times			Times	30
7	Rated Short-Circuit Making Current (Peak)			kA	50
8	Rated Peak Withstand Current			kA	20
9	Rated Short-Circuit Duration			s	4
10	Opening Time (From control unit receiving opening command to three-phase contacts separation)			s	0.040~0.060
11	Closing Time (From control unit receiving closing command to three-phase contacts closing)			s	0.070~0.120
12	Mechanical Life			Times	10000
13	Rated Closing Operating Voltage			V	DC110, DC220
14	Rated Opening Operating Voltage			V	DC110, DC220
15	Overcurrent Protection	Current Setting Multiples		S	0.2~2.5
		Setting Current Tolerance			±10%
16		Delay Setting Value			0~5
		Delay Tolerance			±10%
		Current Setting Multiples			2.5~10
17	Instantaneous Protection	Setting Current Tolerance		S	±10%
		Delay Setting Value			0~0.5
		Delay Tolerance			±10%
18	Rated Value of AC Charging for Control Unit	Rated value		A	5
	Input Current	Range of fluctuation			0.5~8