What is the difference between EFS-9252 and EFS-9253?
2 or 3 phased powercontroller
The difference between EFS-9252 and 9253 is the number of thyrister in the unit. 9253 has 3 thyristers - and the 9252 only 2. 9253 is only used if the heat source is star connected and star point is connected to neutral.
