RSR-72
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Catalog excerpts

RSR-72 - 1

RSR-72 AUTO RESTART MOTORS RELAY The RSR-72 type relay for re-start and reacceleration is deigned to perorm the autof matic 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 re-start with a correct sequence depending of the working process. The RSR-72 relays are housed in a case for flush mounting or panel mounting or on DIN rail 35 mm on extractible undecal socket type. On front panel there are potentiometers and micro-switches for settings and one LED to indicate the functional status. GENERAL CHARACTERISTICS The RSR-72 relay is used in association with an holding position contact. Otherwise from the RSR-72, the RSR-72A maintains the contact closed after the restarting the motor/contactor. On the relay is possible to set a memory time from 0.2 to 60 seconds and a delay time from 0.2 to 1000 seconds. Anytime a voltage lack (or with a value less of 65% of the rated voltage) and subsequently the voltage restores (at least the 90% of the rated voltage) within the memory time set the re-start motor output will be activated after the delay set. If the voltage restores after the memory time, the automatic re-start will not happen, while the voltage restores in a time less than 0.2 seconds (the minimum memory time), the motor will reaccelerate. If the reacceleration function is activated and the voltage go back in a time less than 0.2 seconds (maximum time for reacceleration) the motor will reaccelerate immediately, if the reacceleration function is not activated after the delay time the motor will restart automatically. • 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 MICROPROCESSOR ORDER CODE RATED AUXILIARY SUPPLY VOLTAGE For applications with the control device of the contactor with contact impulsive position. For applications with device contactor control with a maintained contact. Tripping delay time adjustment Regolazione tempo di memoria LED OPERATING STATUS. For applications with the control device of the contactor with contact impulsive position with special mode of the memory count. Undecal support Restraint spring for fixing undecal support 2 DIP SWITCHES SETTINGS: 4a – F1 - F2 reacceleration function F1 = acceleration deactivated F2 = acceleration activated Re-Start Relay operating status LED operating status: ON Standby Re-start OFF = power supply and measure voltage are not present ON = relay in normal voltage measurement within the expected range SLOW = relay in stand-by, the voltage lack for a time greater than the time memory, the restart is not executed even if the supply voltage is present. FAST = relay in restart, the voltage lack has been for a time less than memory time, after the delay time set the re-start will be done 4b – x1 - x10 constant selection for memory time adjustment. Examples: positioning the dip switch on x10 and the potentiometer on 3 we will have a memory time of 3x10 = 30 seconds; positioning the dip switch on x1 and the potentiometer on 3 we will have a memory time of 3x1 = 3 seconds 4c – x1 - x10 - x1000 constant selection for tripping delay time adjustment. The constants in relation to the position of the 2 dip switches are the following: • dip switch position x1 and x1 K = 1 • dip switch position x1 and x10 K= 10 • dip switch position x

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RSR-72 - 2

RSR-72 AUTO RESTART MOTORS RELAY TECHNICAL CHARACTERISTICS CONTROL CIRCUIT Control voltage Adjustments time (t) Adjustments tripping set-point (I∆) Threshold voltage lack Threshold voltage restore Minimum time for detecting the voltage lack Maximum reacceleration time Pulse duration to restart AUXILIARY SUPPLY Auxiliary voltage (Us) Rated frequency Maximum power consumption OUTPUT RELAYS Contact arrangement Rated contact capacity Ith INSULATION Insulation test AMBIENT OPERATING CONDITIONS Operating temperature Storage temperature Relative humidity ENCLOSURE Version Degree of protection...

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RSR-72 - 3

RSR-72 AUTO RESTART MOTORS RELAY OPERATING When the voltage is under the threshold of the 65% of the rated voltage, for the RSR-72 relay is a voltage lack. When the voltage restores over the threshold of the 90% of the rated voltage, for the RSR-72 the voltage is ok. 1. With power supply, the RSR-72 relay is in STAND-BY way and the LED blink with rate 1/1. In this way if the voltage go under the threshold value, no operation of restart is performed. 2. Pressing the PM button (START) • the contactor is energized and self-retained by its auxiliary contact • the motor starts , the “R” contact...

Open the catalog to page 3

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