Vacuum Circuit Breakers

Since pioneering the first vacuum interrupter in 1962, Toshiba has continuously advanced its vacuum interrupter technology, solidifying its position as a leader in the industry. The VK and HVK Series circuit breakers embody Toshiba’s dedication to quality and innovation, offering a comprehensive range of voltages and interrupting ratings with unparalleled reliability for global applications.

Overview

Highlights

Compact & Lightweight Design featuring Toshiba’s Axial-Magnetic Field Interrupters.

Designed for Safety with Electrical & Mechanical Interlocks.

Excellent Breaking Performance.

Reduced Maintenance & Inspection.

Available In:

  • Fixed Style
  • Drawout Style
  • Manual Operated
  • Motor Operated

 

VK/HVK Series

The Vacuum VK/HVK circuit breakers blend quality craftsmanship with state-of-the-art vacuum technology to provide a comprehensive range of voltages and interrupting ratings, delivering high reliability and superior service for global applications. Designed for centralized control and protection of equipment and circuits, these breakers feature a compact design with front-mounted circuit control components on printed circuit boards. Assembled in Houston, Texas, every HVK series breaker meets or exceeds ANSI standards, delivering exceptional performance and compliance with industry benchmarks.

 

HV6CS Series

The HV6 series vacuum circuit breakers offer exceptional performance in a compact design, making them a perfect fit for medium-voltage, low-capacity power receiving and transforming facilities. Engineered for versatility, the low-surge HV6 series is ideal for applications such as mobile power centers, portable substations, and generator protection or paralleling. With excellent breaking and interrupting capabilities, these circuit breakers not only enhance operational efficiency but also help extend service life and minimize maintenance requirements.

 

Simple Installation

Various mounting, connection methods, and multiple main terminal box configuration eases installation and reduces installation costs.

 

Eliminates the Need for Surge Protection Devices

Low surge interrupters & chopping current, eliminate the need for special protective devices for motor starting & transformer loads. No external surge protection required, removing the need for motor surge arresters.

Insulated Bearings

  • An electric motor operating on an adjustable speed drive is at risk for premature bearing failure caused by stray currents. Experience indicates using insulated bearings on both ends of the motors is the most effective way to protect the motor from destructive currents. A high level of bearing protection is especially beneficial in applications where motor maintenance and replacement are difficult.
  • Extended Horsepower Capability

  • Extended horsepower capability allows a smaller motor to run at a higher horsepower than its baseline depending on the application requirements. This provides motor users potential cost savings while achieving the same motor performance.
  • Insulation with Wide Thermal Capability

  • Critical cooling motors utilize many Class H insulation materials in its winding designs, which provides increased thermal protection. These motors operate with a very low temperature rise at rated conditions, giving them a wide thermal margin and extended motor life.
  • Low Vibration

  • A vibration level exceeding NEMA MG1 requirements provides stability and durability by prolonging motor and bearing life and helping to reduce downtime.
  • Specifications

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