VCB Panel

The act of switching medium voltage is not simply defined by the act of opening or closing a circuit breaker; there are many variables, especially when there is a fault in the electrical system (i.e., short circuits). The real challenge comes when an electrical system is faced with clearing current due to faults without creating damage to the equipment connected to it.

Our VCB Panels are designed specifically for the function of clearing current caused by faults, isolating the faulted circuit from other circuits and assuring safety for operators working on the equipment contained in the VCB Panel.

We manufacture these VCB Panels for the following applications; High Tension (HT) Distribution systems, Transformer Protection, and Feeder Control Applications; where the Vacuum Circuit Breaker has been designed to provide dependable performance throughout numerous operations (i.e., making and breaking circuits).

The rating of the VCB is selected based on the actual short-circuit level of the electric system being protected and the configuration of the system as well. The Busbar size, Insulation Clearances, and Compartment Separation are engineered to provide an internal arc containment feature and safe access to the responsible maintenance personnel.

The use of interlocking schemes among breakers, isolators, and earthing switches eliminates the possibility of fault operation through physical restriction. The arrangement of metering and protection relays allows for quick identification of faults by providing visible indication of faults without requiring the access to live parts.

There is adequate cable termination space for large HT cables, which are mounted and controlled sufficiently. Mechanical operation tests, contact resistance, insulation resistance, and secondary relay verification are performed prior to shipment of all these VCB panels. Also, through the use of local or remote operation commands, the operations of the breakers are simulated (closed and opened) as part of the final phase of quality assurance before the shipment of VCB panels.

The above VCB panels are provided for projects throughout the US, where fast clearance of faults, safe isolation and reliable medium-voltage switching are required to support the continuous distribution of power.