Saint Petersburg, Gruzovoy pr., 19 +7(812) 329 97 97 Ru En

Equipment Trolley

Equipment trolley (switchgear draw-out element trolley)  - a metal structure for moving a switching apparatus (or other devices) inside the draw-out element compartment of the complete switchgear cabinet.

The structure is equipped with:

1. Selector switches that enable use of draw-out element position signals;

2. Mechanical interlocks that prevent:

  • Movement of the draw-out element when the power compartment door is open;
  • Movement of the draw-out element when an earthing disconnector is on;
  • Movement of the draw-out element with the vacuum circuit breaker in On position;
  • Operating of a vacuum circuit breaker when the draw-out element is in the intermediate condition.

Motorized equipment trolley - a metal structure for moving a switching apparatus (or other devices) inside the draw-out element compartment of the complete switchgear cabinet, with the capability of remote control of draw-out element movement from the test position to the operating position (draw-in action) and back to the test position (draw-out action) in complete switchgear cabinet.

Motorized equipment trolley can be controlled in two modes:

  • Remote control (motorized equipment trolley is moved by an electric motor through a gear unit, coupling, and chain drive installed in it);
  • Manual control (motorized equipment trolley is moved by a draw-out element operation handle).

The electric motor of the motorized equipment trolley is designed for 220 V d.c. and 180W power. Operating conditions: maximum one cycle of draw-in-draw-out in 5 minutes.

A control unit is coming with motorized equipment trolley, installed in the complete switchgear relay protection and automation cabinet. 

The unit operation algorithm implements interlocks that prevent: 

  • Draw-in of the motorized equipment trolley when the draw-out element compartment door is open;
  • Draw-in of the motorized equipment trolley when the ZRF earthing switch is On;
  • Draw-in of the motorized equipment trolley when the busbar earthing switch is On;
  • Draw-in/out of the motorized equipment trolley when circuit breaker is On.