Why does abb vacuum circuit breaker need energy storage

How does a vacuum circuit breaker work?

For the first time in any vacuum circuit breaker, the interrupter and the current carrying parts are completely embedded in a proprietary epoxy resin. Thermal performance of the interrupter is improved as the epoxy resin draws heat away from hot spots for a more even heat distribution.

What are the functions of Amvac circuit breaker?

All operating mechanism functions are integrated in the magnetic actuator of the AMVAC circuit breaker. The ac-tuator is a bi-stable magnet system, in which armature change-of-state is accomplished by the magnetic field of two electrically excited coils.

How many operations can an Amvac circuit breaker perform?

Having only an open/close actuator, an electronic controller, and capa-citors for energy storage, the AMVAC circuit breaker mechanism is capable of 50,000 to 100,000 operations. Vacuum interrup-ters are embedded in a proprietary epoxy material, achieving excellent dielectric and thermal capabilities.

What is a Vmax circuit breaker?

Vmax/W The new Vmax circuit-breakers are the synthesis of ABB’s affirmed technology in designing and constructing vacuum interrupters and their excellence in design, engineering and production of circuit-breakers. The Vmax medium voltage circuit-breakers consist of an insulating monobloc in which three vacuum interrupters are housed.

What is a vacuum interrupter?

Vacuum interrupters were mounted in open moldings, making them susceptible to dust, moisture, and The AMVAC is truly the next generation in medium voltage va-cuum technology. With the AMVAC, ABB is the first to combine the unique requirements of vacuum interrupter technology to a stored energy mechanism designed to exploit these capabilities.

How many parts are needed for a vacuum interrupter?

More than 100 parts are required to perform spring char-ging, closing, anti-pumping and tripping functions. Conventional stored energy breakers also place limitations on the types of control voltages allowed. Vacuum interrupters were mounted in open moldings, making them susceptible to dust, moisture, and