Patent ID: 7813090

Claim:
A DC switchgear provided with a commutation-type DC circuit breaker having a main circuit provided with a main switch for interconnecting a DC power supply and a load and for enabling and disabling a main circuit current flow, and a commutating circuit provided with a commutating capacitor and a commutating switch, which is connected electrically parallel to the main switch, comprising: a DC circuit breaker accommodating box which includes, as a standard arrangement, the main circuit provided with the main switch, and the commutation-type DC circuit breaker having the commutating circuit provided with the commutating capacitor and the commutating switch, which are connected electrically parallel to the main switch; a front accommodating box disposed on the front of the DC circuit breaker accommodating box, which accommodates devices having functions for controlling the switchgear and indicating a status of the switchgear including a failure status thereof; and a rear accommodating box disposed on the back of the DC circuit breaker accommodating box, which accommodates a device for monitoring a status of the main circuit and protecting the main circuit; wherein the front accommodating box and the rear accommodating box are removably connected to the DC circuit breaker accommodating box, and the front accommodating box and the rear accommodating box are connected to the DC circuit breaker accommodating box to form an integrated DC switchgear.