High Voltage Vacuum Circuit Breaker | VS1 & ZN85 Series

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Reliable High Voltage Vacuum Circuit Breaker Solutions

Reliable High Voltage Vacuum Circuit Breaker Solutions

Moldvolt supplies high voltage vacuum circuit breakers designed for dependable switching and fault interruption in electrical distribution systems. Using vacuum interrupters to extinguish electrical arcs, these breakers provide reliable switching performance, reduced contact maintenance requirements, and effective insulation within suitable equipment designs. Our portfolio includes VS1 and ZN85 series vacuum circuit breakers for compatible medium-voltage switchgear applications. These products serve substations, industrial facilities, commercial buildings, and power distribution networks. With over 10 years of industry experience, 38 technology patents, and exports to 72 destinations, Moldvolt supports international equipment buyers with product selection, technical communication, and assistance matching electrical ratings to project requirements.
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Case Study

Vacuum Circuit Breakers for Electrical Substations

Electrical substations require reliable switching equipment to control distribution circuits and interrupt fault currents under specified operating conditions. High voltage vacuum circuit breakers are widely used in medium-voltage installations because vacuum interrupters provide effective arc extinction without requiring SF6 insulating gas in the interruption chamber. Moldvolt supplies VS1 and ZN85 series breakers for compatible switchgear configurations, including KYN28 cabinet applications. When selecting equipment, engineers should evaluate rated voltage, continuous current, short-circuit breaking capacity, operating sequence, and insulation level. Our product selection support helps substation contractors and equipment manufacturers coordinate suitable switching solutions for electrical infrastructure projects.

Industrial Circuit Breakers for Manufacturing Facilities

Manufacturing plants depend on stable electrical distribution to operate production machinery, motors, pumps, and automated processing systems. Vacuum circuit breakers provide switching and fault interruption capabilities that help protect industrial distribution networks and connected equipment. Moldvolt offers VS1 series vacuum circuit breakers for compatible medium-voltage switchgear applications. For factory installations and equipment upgrades, engineers should consider rated current, short-circuit interruption capacity, switching frequency, operating mechanisms, and installation dimensions. Proper protection coordination helps reduce the impact of electrical faults and supports equipment safety. Our technical communication assists industrial buyers in evaluating specifications and selecting suitable breaker configurations.

Vacuum Circuit Breakers for Commercial Infrastructure

Commercial infrastructure, including shopping centers, hospitals, and office complexes, requires dependable electrical distribution to support essential building services. Vacuum circuit breakers can provide reliable switching and fault interruption within appropriately designed medium-voltage distribution systems. Moldvolt supplies circuit breaker components and related switchgear accessories for compatible commercial applications. During project planning, electrical engineers should assess transformer capacity, rated voltage, available fault current, protection coordination, and cabinet compatibility. Selecting equipment with appropriate electrical ratings helps support safe operation and efficient maintenance. Our product portfolio serves contractors, panel builders, and electrical equipment distributors working on new buildings and infrastructure modernization projects.

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Moldvolt, manufactured by Zhejiang Xianghong Electric Co., Ltd., specializes in electrical distribution equipment and medium-voltage switchgear components. Its vacuum circuit breaker portfolio includes VS1 and ZN85 series products, alongside ZW32 outdoor circuit breakers, load switches, disconnectors, earthing switches, insulators, voltage sensors, contact boxes, and bushings. These components support compatible switchgear configurations such as KYN28-12, KYN28-24, and KYN61-40.5 cabinets. Vacuum circuit breakers use sealed vacuum interrupters to extinguish electrical arcs during current interruption. This technology avoids the need for SF6 gas inside the interrupter and offers practical maintenance advantages when equipment is properly selected and operated. Important selection factors include rated voltage, rated current, short-circuit breaking capacity, insulation level, mechanical endurance, and installation conditions. With over 10 years of industry experience, 38 technology patents, exports to 72 destinations, and more than 300 long-term corporate partners, Moldvolt supports international buyers with product information and technical assistance.

Frequently Asked Questions

What is a high voltage vacuum circuit breaker?

A high voltage vacuum circuit breaker uses a sealed vacuum interrupter to extinguish electrical arcs when opening a circuit. It provides switching and fault interruption functions in appropriately rated electrical distribution systems, particularly medium-voltage substations and industrial switchgear installations.
Vacuum circuit breakers offer effective arc interruption, compact interrupter designs, and reduced contact maintenance requirements. They do not require SF6 gas within the vacuum interruption chamber, making them a practical option for many medium-voltage electrical distribution applications.
Vacuum circuit breakers are commonly installed in electrical substations, industrial manufacturing facilities, commercial buildings, mining operations, and medium-voltage distribution networks. Their application depends on rated voltage, short-circuit capacity, installation conditions, and system protection requirements.
Evaluate rated voltage, rated current, short-circuit breaking capacity, insulation level, mechanical endurance, operating mechanism, and cabinet dimensions. You should also verify compliance with applicable standards and ensure proper coordination with other protective devices.
Moldvolt offers VS1 and ZN85 series vacuum circuit breakers, together with ZW32 outdoor circuit breakers and supporting switchgear components. Customers can provide technical drawings, voltage requirements, and equipment models to receive assistance with product selection.

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Customer Testimonials

Michael Brown

We purchased vacuum circuit breakers for a medium-voltage switchgear project. Product specifications were clear, and technical support helped our team coordinate equipment selection efficiently.

James Wilson

The circuit breakers met our project requirements. Their technical communication and product selection assistance helped simplify procurement and switchgear configuration.

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Advanced Vacuum Interruption Technology for Electrical Protection

Advanced Vacuum Interruption Technology for Electrical Protection

Vacuum interruption technology provides an effective method of controlling electrical arcs during circuit breaker operation. Inside a sealed vacuum interrupter, the arc is extinguished as current passes through its natural zero point, supporting reliable current interruption under specified conditions. Moldvolt supplies VS1 and ZN85 series vacuum circuit breakers for compatible medium-voltage switchgear applications. These products serve substations, industrial facilities, and commercial distribution networks. Engineers selecting a breaker should consider rated voltage, continuous current, short-circuit breaking capacity, insulation level, and mechanical endurance. Vacuum technology also eliminates the need for SF6 gas inside the interrupter, offering an alternative for projects prioritizing reduced use of fluorinated insulating gases.
Manufacturing Expertise and Global Electrical Equipment Supply

Manufacturing Expertise and Global Electrical Equipment Supply

Moldvolt combines electrical manufacturing experience with a comprehensive portfolio of distribution equipment to support international customers. The company has more than 10 years of industry experience, 38 technology patents, exports to 72 destinations, and over 300 long-term corporate partners. Its product range includes vacuum circuit breakers, load switches, disconnectors, earthing switches, insulators, voltage sensors, and other switchgear accessories. These products support compatible electrical cabinet configurations for substations, industrial plants, and infrastructure projects. For overseas distributors, contractors, and panel manufacturers, Moldvolt provides product specifications and technical communication to help evaluate equipment ratings, installation requirements, and component compatibility, supporting more efficient procurement and project coordination.

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