RSR-72

STATIC RELAY FOR MOTOR RE-START AND REACCELERATION

The RSR-72 type relay for re-start and reacceleration is deigned to perform the automatic motor restarting, after control and protection device opening, as a consequence of a momentary line voltage interruption or drop-out. The RSR-72 relays allow, after the stop of the motors, the automatic restart with a correct sequence depending of the working process.

FUNCTIONS

The RSR-72 relay is used in association with an holding position contact.On the relay is possible to set a memory time from 0.4 to 60 seconds and a delay time from 0.4 to 1000 seconds.Anytime a voltage lack and subsequently the voltage restores within the memory time set the re-start motor output will beactivated after the delay set.If the voltage restores after the memory time, the automatic re-start willnot happen, while the voltage restores in a time less than 0.4 seconds, the motor will reaccelerate.If the reacceleration function is activated and the voltage go back in atime less than 0.2 seconds the motorwill reaccelerate immediately, if the reacceleration function is not activated after the delay time the motor will restart automatically.

APPLICATIONS

• Supply circuit and voltage control
• Circuit of contactor control and of memory activation with separation by photo-coupler
• Circuit of motor stop control by PA pushbutton (stop) and quick memory shutdown separated by photo-coupler
• Circuit for final relay closing and control circuit are managed by microprocesso

MODELS

RSR-72 circuits 230V 50÷60Hz
RSR-72 circuits 115V 50÷60Hz