Our 3 phase Auto changeover control panels are built to suit your motors. We also build 3 phase Auto changeover controls with built in inverter or transformer speed controls.
The following is an example of a bespoke 3 phase auto changeover control designed and built by Sarum to our client’s specifications. For more information about our bespoke control panels or to tell us about your specific needs, request a quote or contact us by phone or email.
Description of controls:
The panel is designed to control two, three phase fans on a duty share basis. Each fan will run for 5 hours, then change over to the standby fan. The individual fans can be selected to run continuously by selecting the required fan on the selector switch on the panel facia.
If a fan goes into fault, the fault indicator lamp will illuminate and the panel will switch to the standby fan, and the volt free fault contacts will make. The control panel is designed to be wired into the buildings fire alarm circuit, this will shut the fans down in the case of a fire.
Features:
- Door interlocking isolator
- Selector switch for Fan 1, Fan 2 or Auto Sharing
- Indication for Panel Live, and individual Run and Fail indicators for each fan
- Thermal overload and MCB protection for each fan
- Fire alarm contacts for shutdown in fire situation
- Volt free fan fail output
- Change over on fan failure
- Duty share every 5 hours
Connections:
- 3 Phase fans x 2
- Fire alarm circuit
- Airflow switch
- Volt free fault contacts
Enclosure details:
- Dimensions: 300(w) x 400(h) x 150(d)mm
- Finish: RAL 7032 textured
- Cable entry: Top
- Weatherproof: No
Installation instructions:
The control panel is designed for wall mounting in a clean, dry environment where the ambient temperature does not exceed 30°C. A space approximately 50mm should be left around the enclosure to allow for heat dissipation.
Fix the enclosure to the wall using proprietary fixings. Remove the gland plate then drill and gland for necessary cable entry and exits. Replace the gland plate and wire panel in accordance with the wiring diagram. All wiring must comply with current regulations and be in compliance with the Health and Safety at Work Act.