Single Phase Transformers
Single Phase Transformers are most commonly ‘step-down’ types.
This means that the voltage that comes out is less than the voltage going into the transformer.
The ‘transformer ratio’ of the winding’s on the input side ‘primary’ & output side ‘secondary’, determines the output voltage.
Example: 100 volts AC going in with a 10:1 (Primary / Secondary) winding ratio, would give 10 volts output.
They may well be used in industrial environments, such as factories.
The transformers will be found in a variety of equipment around the factory.
For example inside larger Direct-On-Line (D.O.L) & Star-Delta Induction Motor Starters.
In such an application, the transformer is used to energise the coil inside the Contactor.
Another place you will find one is in a LoraWAN Gateway.
The LoraWAN Gateway which I built for Yesway Ltd, has one to reduce the 240VAC mains voltage, down to 6 VDC.
To get DC rather than AC, a recifier circuit is added to the output of the Secondary Winding.