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Can the C445 overload protection relay be used in single phase applications?

Yes! To wire single phase 120 vac to a C445 Measurement Module(MM). Be sure the Measurement module is configured for single phase and that the Motor Rated Voltage is set to 120 vac with the inControl software

Make the connections as shown below. Route the Line wire thru the 1/L1 - 2/T1 aperture and the Neutral thru the 3/L2 - 4/T2 aperture. Any wires routed thru the 5/L3 - 6/T3 aperture are ignored when the MM is configured for single phase operation.

If the MM is capable of voltage sense, connect Line to V1 and Neutral to V2. Inputs to V3 are ignored when the MM is configured for single phase operation. That’s it!

The C445 also supports ground fault for these single phase 120 vac applications because it can take the difference between the 2 wires passing through the CTs.

For more information about C445 power expert modules and to download the software click on the link below

Eaton.com/C445

NOTE: The figure above depicts both Line and Neutral switching and protection. Only the Line current may be switched if local code permits.