Line Contactor in Welding Transformer
Line contactor is an electronic switch , which can connect or disconnect ac supply to the welding transformer primary at the time of welding . It is controlled by the control signals from the control circuits.
Types of line contactors :
Here we have to study two types of line contactors, which are as follows :
- Ignitron line contactor and
- SCR line contactor.
Before studying ignitron line contactor circuit, we will study the construction of ignitron tube used in this circuit.