Tronic Onload Enclosed Manual Changeover Switch 250A 4 Pole CO 4250-EC

Our review

This is a Tronic enclosed manual changeover switch rated at 250A with four poles, listed as model CO 4250-EC. It is the piece of equipment that lets an operator move a supply from the mains to a backup source such as a generator by hand, and the enclosure keeps the working parts protected rather than leaving them exposed on a panel. It suits someone setting up or upgrading a backup power arrangement where the changeover is done deliberately by a person, not automatically.
Before buying, confirm the current your installation actually draws and that a four-pole configuration matches how your supply is wired, since pole count affects whether neutral is switched along with the phases. Check that the enclosure can be mounted where it will be operated and that cable entries suit your wiring. Compare against automatic changeover units, which cost more and add complexity, and against open switches that need a separate box. If manual operation is acceptable, this kind of enclosed unit is the simpler route. Available on Sokonia.