Automatic load switching board

Features

  • Continuous automatic monitoring of power on the main and backup inputs
  • Reliable supply of power
  • Visual monitoring of power at main and backup inputs, operation of devices for main and backup power switching
Product Datasheet

Approvals

Automatic load switching board (ALSB) is used to reconnect the load to a source of power by automatically switching to a second (backup) input when power is lost at the first (main) input. Normally, the switchboard is reset automatically when the main source of power is restored (priority of the first input). The main input is typically a stationary power mains Un = 380 V, f = 50 Hz. The backup input can be a stationary power mains or a diesel generator. ALSBs are widely used at industrial and civil engineering sites, cellular communication stations, etc., and are also used to supply power during scheduled maintenance and repair work.

State-of-the-art electronic devices are used to automate the switchboard. The most frequently used set of control circuits is a full-function phase-monitoring relay; special controllers are specified less often. These devices control power elements — contactors, breakers, or circuit breakers with servo drives.

  • Continuous automatic monitoring of power on the main and backup inputs
  • Reliable supply of power
  • Visual monitoring of power at main and backup inputs, operation of devices for main and backup power switching
Technical Data
Rated operational voltage, Un 380 V
Rated current, In 160-3200 A (for ALSB up to 160 A)
Rated frequency, f 50 Hz
Time switching from the main input
to the backup and vice versa
0.5-0.8 sec
Earthing system TN-S; TN-C; TN-C-S
Protection class IP31 or IP54
Climatic versions and placement category UHL4
Design option floor-mounted/wall-mounted (ALSB)