The new Vmax circuit breaker are the synthesis of ABB's affirmed technology in designing and constructing vacuum interrupts and their excellent 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.The monobloc and operating mechanism are fixed to a frame. The vacuum interrupt house the contacts and makes up the interrupting chamber.
EL type operating machnism
The low speed of contacts, together with the reduced run, and the mass contained, limit the energy required for the operation and therefore guarantee extremely limited wear of the system. This means the circuit breaker requires limited maintenance.
The Vmax circuit-breakers use a mechanical operating machanism, with stored energy and free release. These characteristics allow opening and closing operations independent of operator. The machanical operating machanism is of simple concept and use and can be customized with wide range of easily and rapidly installed accessories. This simplicity translates into greater reliability of the apparatus
The Structure
The operating machanism, the monobloc and the interrupters are fixed to a metal frame which is also the support for the fixed version of the circuit breaker. The compact structure ensures sturdiness and machanical reliability.