EV-ATSB Automatic Transfer Switch with bypass


Our automatic transfer switch EV-ATSB is used for changeover between primary and secondary sources, providing an essential maintained power supply to life safety and firefighting systems.
Automatic Transfer Switch Conformity:

  • UKCA & CE Marked
  • BS EN 61439
  • BS EN 60947-6
  • BS 8519
SKU: N/A Category: Tag: Brand:

Automatic Transfer Switch Maintenance

With a built-in dual-line bypass switch that maintains power to the critical plant during maintenance of the ATS device in accordance with BS 8519. Includes a key switch to test the transfer to the secondary supply.

Automatic Monitoring

Automatic monitoring for the loss of the primary supply and switching to a secondary source, then transferring back when the primary supply returns healthy.

Automatic Transfer Switch Indicators

Primary and secondary supply available and engaged indicators. Status contacts are provided for BMS or third-party monitoring.

Under the Construction Products Regulations (CPR) it is a legal requirement to use only certified products for smoke ventilation. It is the responsibility of the installer to ensure installations meet the relevant standards. For more information see SCS Group’s Technical Bulletin.

Dimensions N/A


Cable Entries


IP Rating

IP55 weatherproof with rain canopy

Voltage Input

400V AC 50Hz 3P & N

Voltage Output

400V AC 50Hz 3P & N

Operating Temperature

-10°C to +40°C ambient temperature


Mild steel, RAL 7035 light grey powder-coated finish

Max Current Load

125A, 160A, 200A, 250A, 400A, 40A, 63A, 80A

Control Panels 4 to 5 weeks
Actuators (non-stock items) 2 to 3 weeks
Ventilators 4 to 5 weeks
Louvred Windows 8 to 10 weeks
    Your Basket
    Your basket is emptyReturn to Shop