Tronic Phase Failure and Sequence Relay 415V

Our review

This Tronic relay is a monitoring device for three-phase 415V supplies. It watches the incoming phases and uses one or more relay outputs, wired in a failsafe arrangement, so the contacts hold their safe state until the supply conditions sit inside the permitted tolerances. Only then do the relays activate and close the circuit. That behaviour suits anyone protecting motors, pumps, compressors or other equipment that suffers when a phase drops out or the sequence is wrong, and it is a sensible fit for panel builders, maintenance electricians and workshop owners working on 415V systems.
Before buying, confirm the coil and contact arrangement your control circuit needs, since the listing gives no output count or contact ratings. Check how the relay will be mounted and how it will be reset after a fault, and make sure your supply really is 415V three-phase. Compare it with other phase failure and sequence relays on the basis of output configuration, adjustment range and enclosure rather than brand alone. If those details are not shown, ask the seller on Sokonia before ordering.