The power and the control circuits are supplied simultaneously
It Is recommended to use the safety relay for signaling, should the speed controller lock
out (terminals SA-SB).
Drawback of this solution
- no fault signal memory In the event of line contactor drop out
Replacement of the Isolator-fuses-contactor with
-either a circuit breaker,
- or a contactor breaker type integral 32/63
there Is a possibility of condensation, It is recommended to keep the control supply
Check the power connections before switching on If, due to a wiring error,
mains voltage is applied to output terminals U/T1, V/T2. W/T3, the speed
controller will be damaged - Avoid on-load switching between the speed
controller output and the motor - If a contactor is required for switching
between the speed controller and the motor, it is necessary to use a special
sequence (p 33).
(page 3- 75)