Dc switchboard for power plants and substations (110 – 750 kv)

The switchboard is used for distribution of DC control current from an accumulator battery.

Switchboard components:

• lead-in cabinet;

• lead-out connection cabinets (two or more);

• control cabinet.

The switchboard is equipped with:

• automatic switches (A3715, VA2129, VA5735 etc.);

• measuring circuit devices;

• switches and circuit breakers (according to the wiring diagram).

The control cabinet includes:

• voltage level control unit (BKN) for voltage monitoring on the DC control current buses;

• data acquisition unit (USD) with local alarm unit (BMS);

• “Sapfir-4”, a system for automated searching for ground faults in the DC control current circuit;

• selective unit for insulation monitoring (UKI-SM);

• circuit for indication of position and condition of the switchboard components;

• measuring circuit.

Control cabinet dimensions: 600 x 600 x 2000 mm.