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ZW20Z-12 Series Outdoor High Voltage Vacuum Circuit Breaker.jpg

China ZW20Z-12 Outdoor High Voltage Vacuum Circuit Breaker Suppliers | Reliable Factory for 12kV Solutions

The ZW20Z-12 Series is a high-performance outdoor vacuum circuit breaker designed for 12kV, 50Hz systems, making it an ideal choice for power distribution needs. Manufactured in China, this breaker utilizes advanced Toshiba VSP5 gas seal technology, combining vacuum arc extinguishing with SF6 insulation within a sealed, explosion-proof casing. Known for its exceptional durability and reliability, the optimized spring mechanism ensures consistent performance even in frequent operations. Featuring loop-type bracelet contacts, it minimizes resistance and temperature rise, ensuring efficient operation. This maintenance-free, pole-mounted breaker is designed to seamlessly integrate with intelligent controllers, enabling enhanced distribution automation. As leading suppliers in the industry, we ensure high-quality products straight from our factory to meet your power distribution solutions

Product Details

Technical Specification

Item	Units	Parameters
Rated voltage	kV	12
Rated frequency	Hz	50
Rated current	A	630、1250
Rated short circuit breaking current	KA	12.5、16、20、25
Rated peak withstand current (peak)	kA	31.5、40、50、63
Rated short-time withstand current	kA	12.5、16、20、25
Rated short circuit making current (peak value)	kA	31.5、40、50、63
Mechanical life	Times	10000
Breaking times of rated current	Times	10000
Breaking times of rated short-circuit breaking current	Times	30
1min PF withstand voltage: interphase, to earth/fracture	kV	42
Lightning impulse withstand voltage (peak): interphase, relative/broken circuit	kV	75
Secondary loop 1min power frequency tolerance	kV	2
Net weight	kg	140

Product Model

Dimension

Frequently Asked Questions

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

The rated voltage of this vacuum circuit breaker is 12 kV, making it suitable for medium-voltage power distribution systems.
Q What rated current options are available for this product?

This vacuum circuit breaker is available in two rated current configurations: 630 A and 1250 A, accommodating different load requirements in electrical installations.
Q What is the mechanical life expectancy of this circuit breaker?

The mechanical life of this vacuum circuit breaker is rated at 10,000 operations, and it also supports 10,000 breaking operations at rated current, ensuring long-term reliability and low maintenance costs.
Q What are the short-circuit breaking current ratings available?

The rated short-circuit breaking current options are 12.5 kA, 16 kA, 20 kA, and 25 kA, with corresponding rated peak withstand currents of 31.5 kA, 40 kA, 50 kA, and 63 kA respectively.
Q What is the lightning impulse withstand voltage of this breaker?

The lightning impulse withstand voltage (peak) is 75 kV for interphase, relative, and broken circuit conditions, ensuring strong insulation performance against transient overvoltages.
Q How many times can this breaker interrupt rated short-circuit current?

This vacuum circuit breaker is rated for 30 breaking operations at the rated short-circuit breaking current, which reflects its robust design for handling fault conditions in demanding power system environments.