What the Schneider Electric Contactor Coil (100A+) does
In many generator changeover panels, large Schneider contactors switch the building between mains and generator. The coil is the electromagnet that closes the contacts — when it burns out, the contactor will not pull in and the load is not transferred.
Replacing a burnt coil is quicker and cheaper than replacing the whole contactor, provided the main contacts are still in good condition.
Signs it needs replacing
- Contactor does not close; generator runs but the building stays dark.
- Contactor humming, chattering or closing weakly.
- Burnt smell or discoloured coil.
Get the right part first time
Send us these on WhatsApp and our engineers will confirm the exact part before you pay:
- The contactor reference (e.g. LC1D150) and the coil code on its label.
- The coil voltage (AC or DC).
Fitting notes
Isolate both mains and generator supplies and prove dead before opening a changeover panel — both sources can be live. Inspect the main contacts while the coil is out; pitted or burnt contacts mean the contactor should be replaced instead. Find out why the coil failed — often low control voltage causing chattering.
Frequently asked questions
How do I find the right coil?+
The contactor label gives its reference, and the coil carries its own code and voltage. A photo of both is enough.
Coil or the whole contactor?+
If the main contacts are in good condition, a coil is enough. Burnt or welded contacts mean replacing the contactor.
Why do coils burn out?+
Usually low or unstable control voltage, which makes the contactor chatter, or the wrong coil voltage fitted.