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China Suppliers Factory ZW8-12/630-20 Indoor High Voltage Vacuum Circuit Breaker for Reliable Protection

The ZW8-12/630-20 is a highly efficient 12kV outdoor vacuum circuit breaker designed for 50Hz power systems. Manufactured in China, this compact breaker features advanced ceramic interrupters equipped with durable copper-chromium contacts, ensuring exceptional breaking performance. Its unique three-phase common tank design utilizes dry air insulation, providing reliable operation even in harsh environmental conditions. Ideal for both urban and rural electrical grids, this circuit breaker guarantees safe, maintenance-free protection with no risk of fire or explosion. As a leading supplier and factory in the industry, we guarantee high-quality products that meet rigorous standards

Product Details

Technical Specification

Rated Voltage	12kV
Rated Current	630A
Power Frequency Withstand Voltage	42kV / 48kV
Lightning Impulse Withstand Voltage (Peak)	75kV / 85kV
Rated Short Circuit Breaking Current	20kA
Rated Short Circuit Making Current (Peak Value)	50kA
Rated Sequence of Operations	O-0.3s-CO-180s-CO
Rated Short-Circuit Current Breaking Times	30
Mechanical Life	10,000
Rated Operating Voltage (Close / Brake Coil)	DC 220V / AC 220V
Wear Thickness Between Dynamic and Static Contactor	3mm
Isolating Fracture Break Distance	>200mm

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 12kV, making it suitable for medium-voltage power distribution systems and switchgear applications.
Q What is the mechanical life of the circuit breaker?

The mechanical life is rated at 10,000 operating cycles, ensuring long-term reliable performance in demanding electrical environments.
Q How many times can it break rated short-circuit current?

This unit is rated for up to 30 rated short-circuit current breaking operations, providing robust protection for high-fault-current scenarios.
Q What operating voltages are supported for the close and brake coils?

The circuit breaker supports both DC 220V and AC 220V for the close and brake coil rated operating voltage, offering flexibility for different control system configurations.
Q What is the rated sequence of operations for this breaker?

The rated sequence of operations is O-0.3s-CO-180s-CO, which defines the standard open, close, and reclose timing intervals in accordance with IEC standards.
Q What is the isolating fracture break distance of this product?

The isolating fracture break distance is greater than 200mm, ensuring a safe and sufficient isolation gap to prevent re-striking under normal operating conditions.