ZW39-40.5 Series Outdoor High Voltage Vacuum Circuit Breaker

Our ZW39-40.5 outdoor vacuum circuit breakers utilize vacuum insulation and arc-quenching with a CT10-A spring mechanism, delivering high breaking capacity and reliability for 35kV power systems.

• Rated at 40.5kV with current up to 2500A; short-circuit breaking of 31.5kA with making current up to 80kA.

• Mechanical life of 10,000 operations with 30 rated short-circuit breaking operations.

• Capacitor bank breaking up to 630A; rated out-of-phase breaking of 8kA; phase-to-phase earth fault breaking of 27.4kA.

• Operating duty of O-0.3s-CO-180s-CO; adaptable to altitude up to 3000m and pollution Class IV.

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

Product Overview

The ZW39-40.5 outdoor high-voltage AC vacuum circuit breaker is suitable for use in power systems with an AC rated frequency of 50Hz and a rated voltage of 35kV. It serves as control and protection equipment for power systems. This circuit breaker is suitable for frequent operation and can be used for control and protection in industrial and mining enterprises, power plants, and substations. It can also be employed as a tie circuit breaker.

The circuit breaker complies with the requirements of GB1984-2003 "High-voltage alternating-current circuit-breakers", GB/T11022 "Common specifications for high-voltage switchgear and controlgear standards", and JB/T3855 "High-voltage alternating-current vacuum circuit-breakers". Utilizing vacuum as the insulation and arc-quenching medium and equipped with a CT10-A improved spring operating mechanism, the breaker features high breaking capacity, low operating energy requirements, and high reliability.

Technical Specifications

S.Q.	Item		Unit	Parameter
1	Rated Voltage		kV	40.5
2	Power Frequency Withstand Voltage	Phase-to-Earth	kV	95
		Across Isolating Distance	kV	90
3	Lightning Impulse Withstand Voltage (Peak)	Phase-to-Earth	kV	185
		Across Isolating Distance	kV	185
4	Rated Current		A	2000	2500
5	Rated Short-Circuit Breaking Current		kA	31.5
6	Rated Short-Time Withstand Current		kA	31.5
7	Rated Short-Time Duration		S	4
8	Rated Short-Circuit Making Current (Peak)		kA	80
9	Rated Peak Withstand Current		kA	80
10	Rated Number of Short-Circuit Breaking Operations		times	30
11	Rated Single Capacitor Bank Breaking Current		A	630
12	Rated Out-of-Phase Breaking Current		kA	8
13	Rated Phase-to-Phase Earth Fault Breaking Current		kA	27.4
14	Rated Operating Sequence			0-0.3s-CO-180s-CO
15	Mechanical Life		times	10000
16	Stored Energy Motor Rated Voltage		V	DC220/AC220/DC110
17	Rated Operating Voltage	Opening Coil	V	DC220/DC110
		Closing Coil	V	DC220/DC110

Normal Service Conditions

1	Ambient air temperature	-40°C to +40°C;
2	Altitude	Not exceeding 3000 m;
3	Wind speed	Not exceeding 34 m/s;
4	Daily temperature variation	Not exceeding 25°C;
5	Solar radiation intensity	Not exceeding 0.1 W/cm²;
6	Monthly average relative humidity	Not exceeding 90%;
7	Seismic acceleration	Horizontal not exceeding 0.2g, Vertical not exceeding 0.1g;
8	Ice coating thickness	Not exceeding 10 mm;
9	Atmospheric pollution severity	Not exceeding Class IV as per GB/T5582;
10	Installation site	Outdoor.

If the user has special service condition requirements, please consult with the manufacturer separately.

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