12kV Indoor Permanent Magnet Vacuum Circuit Breaker

As a supplier of medium-voltage electrical equipment, Dongfa Intelligent provides the 12kV Indoor Permanent Magnet Vacuum Circuit Breaker for indoor 12kV, 50Hz medium-voltage power distribution systems. It can be used for circuit connection, disconnection, and fault current interruption. The ZN63A(VS1)-12 employs a bistable permanent magnet operating mechanism, using a permanent magnet to provide holding force, allowing the circuit breaker to remain stably in the closed or open state.

For power companies, power plants, mines, and industrial enterprises, medium-voltage circuit breakers need to meet voltage and current requirements while also considering operating mechanism reliability, short-circuit breaking capacity, mechanical life, and maintenance needs after long-term operation. This product is designed for switching and protection applications in 12kV indoor medium-voltage power distribution systems.

Core Advantage

Permanent Magnet Operating Mechanism

The ZN63A(VS1)-12 uses a bistable permanent magnet operating mechanism. The permanent magnet provides the holding force for both the open and closed positions, reducing the number of mechanical parts and shortening the transmission chain.

Mechanical Life

Rated Mechanical Life: 20,000 Operations

The 20,000-operation mechanical life provides a reference for long-term repetitive operation in power distribution, industrial, and mining applications.

Short-Circuit Performance

Rated Short-Circuit Breaking Current: 20kA / 25kA / 31.5kA / 40kA

Maximum Breaking Current: 40kA

The appropriate breaking capacity should be selected according to the project's calculated short-circuit level.

Rated Current Options

Rated Current: 630A / 1250A / 1600A / 2000A / 2500A

The final rated current and short-circuit breaking capacity should be confirmed according to the system requirements and technical configuration.

Technical Specifications

There are some layout errors in the correspondence between rated current, short-circuit breaking capacity and insulation class in the original manufacturer's parameter table. Therefore, the final technical configuration and manufacturer's confirmed information shall prevail when confirming the formal order.

Application

Power Utilities

The 12kV Indoor Permanent Magnet Vacuum Circuit Breaker is suitable for power companies and related medium-voltage power distribution systems for circuit control and fault current interruption.

Power Plants

Suitable for indoor medium-voltage power distribution equipment in power plants. The appropriate product configuration should be selected based on the project's short-circuit level and load.

Mining Operations

Suitable for medium-voltage power supply systems in mines. For long-term operation scenarios, the permanent magnet operating mechanism and the 20,000-cycle mechanical life can be considered together with the actual operating conditions.

Industrial Facilities

Suitable for medium-voltage power distribution systems in industrial plants, production facilities, and enterprise premises, providing interruption and protection support for related electrical equipment.

Installation and Engineering Selection

Switchgear Compatibility

For 12kV medium-voltage projects, the electrical performance of the circuit breaker itself is only one part of the selection process; the installation method and switchgear structure are equally important.

The ZN63A(VS1)-12 can be configured with appropriate installation structures according to project requirements. For projects requiring compatibility with existing switchgear, the following information should be provided in advance:

• Switchgear Model
• Installation Space
• Contact Arrangement
• Installation Interface

Confirming this information in advance can reduce the risk of installation size or interface mismatch issues after equipment delivery.

Key Selection Parameters

When purchasing a 12kV Indoor Permanent Magnet Vacuum Circuit Breaker, it is recommended to confirm the following technical and project requirements:

• Rated Voltage: 12kV
• Rated Current: Confirmed based on system load
• Short-Circuit Breaking Current: Confirmed based on system short-circuit level
• Operating Mechanism: Permanent Magnet
• Application: Utility / Power Plant / Mining / Industrial
• Required Quantity: Quantity required for the project

The required specifications should be confirmed according to the power distribution system and project requirements before ordering.

Why Choose DFZN

Production Capability

The company operates a production facility of more than 2,000 square meters with 2 production lines and testing equipment.

Product Range

DFZN provides vacuum circuit breakers, load switches, disconnect switches, and high- and low-voltage electromagnetic coils covering 12kV, 24kV, and 40.5kV applications.

Quality Assurance

The company is certified to ISO 9001, ISO 14001, and ISO 45001, with core products type-tested by the National High-Voltage Electrical Apparatus Quality Supervision and Inspection Center.

OEM/ODM and Global Markets

DFZN has provided OEM/ODM manufacturing services, with products supplied to Southeast Asia, the Middle East, Africa, and other overseas markets.

FAQ

What is a permanent magnet vacuum circuit breaker?

A permanent magnet vacuum circuit breaker is a medium-voltage switchgear that uses a permanent magnet operating mechanism based on a vacuum circuit breaker. The ZN63A(VS1)-12 uses a bistable permanent magnet operating mechanism, which provides holding force through a permanent magnet to keep the circuit breaker in the closed or open state.

What is the rated voltage of the ZN63A(VS1)-12?

The rated voltage of this product is 12kV, and the rated frequency is 50Hz.

What is the mechanical life?

The rated mechanical life of the ZN63A(VS1)-12 is 20,000 operations.

What is the maximum short-circuit breaking capacity?

According to the currently available technical data, the maximum rated short-circuit breaking current of this product is 40kA.

What rated current options are available?

The available data covers rated current specifications of 630A, 1250A, 1600A, 2000A, and 2500A. The specific combination needs to be confirmed based on the final product configuration.

What is the main feature of the permanent magnet mechanism?

This product adopts a bistable permanent magnet operating mechanism. According to the manufacturer's technical description, this mechanism can reduce the number of mechanical parts and shorten the mechanical transmission chain, improving operational reliability from a structural design perspective.

Is this breaker suitable for power plants and mining?

Yes. Dongfa has products used in power supply bureaus, power companies, power plants, mines, and other enterprises. Whether it meets the specific requirements of a particular project needs to be confirmed based on rated current, short-circuit capacity, installation conditions, and other system parameters.

How can compatibility with existing switchgear be checked?

It is recommended to provide the existing switchgear model, original circuit breaker model, installation dimensions, contact connection information, and project electrical parameters for technical matching confirmation.