ZW20-12 Outdoor High Voltage Vacuum Circuit Breaker

SH Power possesses a well-established R&D and engineering team capable of tailoring exclusive solutions for various project requirements. From system design to on-site application, we provide comprehensive technical support, helping customers achieve safe, intelligent, and highly efficient power distribution systems.

Description

The ZW20-12 outdoor high-voltage AC vacuum circuit breaker is designed for 12kV three-phase distribution systems, capable of reliably interrupting load current and short-circuit current. It can be paired with a controller to support distribution automation functions as a replacement for conventional reclosers. When equipped with electronic transformers and bidirectional metering terminals, it meets grid requirements for integrated primary/secondary systems, making it an ideal solution for smart grid and compact substation applications.

Item		Technical parameters
Rated voltage		12
Rated frequency		50/60
Rated current		630
Rated insulation level	1-min power-frequency withstand voltage (r.m.s.)	Phase-to-phase and phase-to-earth	Across open contacts
		42	48
	Lightning-impulse withstand voltage (peak)	75	85
Rated circuit-breaker breaking current		20/25
Rated short-circuit making current (peak)		50/63
Rated short-time withstand current (4 s, r.m.s.)		20/25
Rated peak withstand current		50/63
Number of mechanical operating cycles		10000
Degree of protection		IP65

Features

Four-remote capability: ready for remote control, remote measurement, remote signalling and remote adjustment when paired with a controller.
Flexible, convenient operation: motor-charged, motor-open/close, with manual operation also supported.
Superior breaking performance: can break 25 kA short-circuit current up to 30 times.
Low operating power, high reliability: optional spring-operated or permanent-magnetic mechanism.
Reliable sealing: SF₆ pressure at “zero” gauge and proven sealing technology give dependable, leak-resistant performance.
Versatile cable connection: outlets can use silicone-rubber bushings or fully insulated cables.
Safe in service: explosion-proof device on top prevents escape of hot gases or debris even under internal fault conditions.
High protection degree: three-phase common-tank design achieves IP67.

Key Features

Compact and Modular Design

Our switchgear, including C-GIS and ring main units, features a compact and modular design, saving valuable installation space and allowing for flexible expansion and easy on-site assembly.

Superior Safety and Reliability

With all high-voltage components sealed in a stainless-steel gas tank, our equipment is protected from environmental factors. It features reliable mechanical and electrical interlocks to ensure the safety of operators.

Environmentally Friendly Options

Committed to sustainability, we offer eco-friendly switchgear that uses dry air as the insulating medium, completely eliminating SF₆ gas and minimizing environmental impact.

Maintenance-Free Operation

The fully sealed and insulated design ensures our switchgear is virtually maintenance-free throughout its service life, significantly reducing operational costs and downtime.

Intelligent and Automated

Our products can be integrated with intelligent solutions, supporting remote monitoring, control, and automated distribution systems, which is crucial for building modern smart grids.

Applications and Utility

Urban and Industrial Power Distribution

Ideal for secondary distribution substations, industrial parks, commercial buildings, and residential communities, providing reliable power control and protection.

Renewable Energy Projects

Perfectly suited for renewable energy applications such as wind farms and solar power plants, where compact and reliable switchgear is essential for power collection and grid connection.