E and R controllers/controllers/thyristor-controllers/e-and-r/
E controls the start capacitor. This is for the idler as well as for load motors.
There is no need for a start relay.
R senses the voltages and uses a second run capacitor for voltage symmetry.
This can be added to older rotary converters.
230V 400V SCRs
5hp 4kW internal
10hp 8kW internal
15hp 16kW internal
30hp 24kW external
60hp 48kW external
Voltages adjustable by trim pot