MachineryFix

273 models · 33 manufacturers

Protection Relays repair

Numerical and electromechanical protection relays for motors, feeders, generators and transformers. Protection relays have to trip when needed and stay quiet otherwise, so a repaired relay must be tested against its settings, not just powered up. Power supplies, input boards, displays and output contacts are the usual failure points.

Manufacturers

Protection Relays by manufacturer

Models

Protection Relays in the catalog

A selection. Pick a manufacturer above for the full list, or search by part number at the top of the catalog.

Common faults

What usually fails on Protection Relays

First checks

What to check before calling an engineer

Isolate and lock out the supply, and wait for stored energy to discharge, before opening anything.

Warranty. Repairs carry a warranty of 30 days to 6 months, depending on the item and the repair; the exact term is confirmed before work starts.

FAQ

Protection Relays repair questions

How is the protection relay tested after repair?+

Beyond powering up, the relay is checked with secondary injection so its measuring inputs, protection functions and output contacts are confirmed to work.

More manufacturers

Protection Relays from other manufacturers

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