ZW7 33kv 40.5kv Outdoor Substation Type High Voltage Vacuum Circuit Breaker

Lugao's 220kV porcelain-insulated Surge arresters are overvoltage protection devices suitable for use in large substations and UHV transmission lines. Lugao utilizes leading edge porcelain sintering technology and a dedicated production line, capable of producing hundreds of units per month. These products fully comply with GB and IEC standards. Each arrester undergoes comprehensive type and factory testing to ensure reliable product quality.

Model:7

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Product Description

Lugao's ZW7 outdoor pole-mounted high-voltage vacuum circuit breakers are primarily used for line protection and control at substation exits, power distribution in industrial and mining enterprises, and in urban and rural power grids. This product utilizes a vacuum arc extinguishing principle combined with SF6 gas insulation, combining the high interrupting performance of vacuum switches with the excellent outdoor adaptability of gas insulation. It is suitable for outdoor pole-mounted installation, frequent operation, and high-altitude locations.

The ZW7 series circuit breakers utilize high-performance vacuum interrupters with rated currents ranging from 1250A to 2500A. They are maintenance-free, have a long electrical life, and offer a low cutoff current. The spring-loaded operating mechanism allows for both electric and manual operation, supporting remote control and automation system integration. The stainless steel housing achieves an IP65 rating, effectively withstanding the diverse outdoor environments. Its compact and lightweight design allows for direct installation on utility poles or outdoor platforms. Lugao's circuit breakers have undergone a comprehensive quality control process, including a full set of type tests for power frequency withstand voltage and lightning surge testing. They have also received numerous international certifications, such as CE and ISO. Lugao boasts an automated production line and a comprehensive suite of testing equipment, ensuring both high production volume and high quality. Each circuit breaker undergoes over 200 cycles of mechanical operation and performance testing before leaving the factory. Lugao offers customized services, designing custom specifications to meet customer needs. We maintain a sufficient inventory of standard models and provide installation guidance, commissioning, and lifetime maintenance support.

ZW7 High Voltage Vacuum Circuit Breaker Technical Specifications

ltem	Unit	Parameter
Voltage, current parameters
Rated voltage	KV	40.5
Rated short time power frequency withstand voltage (1 min)	KV	95
Rated lightning impulse withstand voltage (peak)	KV	185
Rated current	A	1250，1600，2000
Rated short-circuit breaking current	KV	25,31.5
Rated operating sequence		0-0.3s-C0-180s-C0
Rated short-circuit current breaking times	times	12
Rated short-circuit closing current (peak)	KA	63.80
Rated peak withstand current	KA	63.80
Rated short-time withstand current	KA	25,31.5
Rated short-circuit current duration	S	4
Average opening velocity	MS	1.5±0.2
Average closing speed	MS	0.7±0.2
Contact closing bounce time	MS	＜5
Three-phase close(open)synchronization error	MS	＜2
Closing time	MS	<150
Opening time	MS	<60
Mechanical life	times	10000
Rated operational voltage and auxiliary circuits rated voltage	V	DC220.AC220
DC resistance of circle every phase (not including transformer)	μQ	<100
Dynamic,static contact allowed to wear thickness	MM	3
Weight	KG	800