What is Control Transformer?

Definition

A transformer that steps down mains voltage to a lower control circuit voltage, typically 24 VAC or 120 VAC. Control transformers isolate and power PLC inputs, relay coils, and indicator lights in control panels.

Related Terms

Transformer

An electromagnetic device that transfers electrical energy between circuits by c...

Isolation Transformer

A transformer with a 1:1 turns ratio that provides galvanic isolation between pr...

Voltage Regulator

A circuit or device that maintains a constant output voltage despite variations ...

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