As it becomes more and more common with live working, performed by special trained staff, the question has been raised if it is possible to use the manual links in the DCB-design for live working.
In a plant taken into service, a test was performed, where a DCB first was linked off from the live switchgear and then reconnected. The test was documented in this video film.
Learn more about disconnecting circuit breakers from ABB: http://bit.ly/ABB-DSC

Important notice:
This is carried out by the national distribution company in Sweden, thus following all applicable laws and regulation.

Circuit breakers allow the flow of energy to be controlled by safely switching currents on and off at all voltage levels of the energy grid. The interrupter and the mechanical drive are the main components that are subject to wear and aging. In order to ensure the proper operation of a circuit breaker throughout its lifetime, diagnostic tests are performed, such as resistance, timing, minimum pick-up, travel, and power factor.