Transformer that steps down mains voltage to the control circuit voltage.
Full Definition
The control transformer steps down the incoming mains voltage (typically 400 V AC) to the lower voltage required by the elevator control circuits (commonly 24 V DC, 48 V DC, or 110 V AC). Isolation from the mains is a key safety function, protecting maintenance personnel from high voltage exposure. The transformer is typically sized to supply the full control circuit load plus a 20% safety margin. Secondary-side fuses protect each branch circuit. Core and coil construction ensures stable output voltage despite mains fluctuations.
