Monitoring relay, can be attached to contactor 3RT2, size S2 Basic, analog adjustable Apparent current monitoring 8...80 A, 50...60 Hz, 2-phase Supply 24 V AC/DC 1 changeover contact Monitoring for current overshoot and undershoot Phase failure, wire break With or without error memory Start-up delay 0-60 s Noise peak suppression 0-30 s Switching hysteresis 6% Spring-loaded technology Monitoring relay SIRIUS 3RR2 for connection to contactors SIRIUS 3RT2 or for individual installation for multi-phase current monitoring of the entire system or the driven process. The reliable monitoring for cable breakage, phase failure, phase sequence, residual current, motor blocking and much more creates increased system availability. Actual value displays, status messages and clear error messages enable fast and reliable diagnosis. Control connection via IO-Link is also possible. You also save costs because only one device is required to monitor a motor along the entire torque curve and no separate current transformers are required. Direct installation on the 3RT2 contactors means there is no additional wiring work in the main circuit. You also benefit from the wide-voltage power supplies for worldwide use. Analogue adjustable, 2-phase versions and digitally adjustable, 3-phase versions (with and without IO-Link) are available, each in three sizes with different current measuring ranges, with two different supply voltages and two connection types. Suitable supports are available for individual installation of the 3RR2 monitoring relays. SIRIUS Relay - a program for all cases.
| Property | Value |
| Max. permissible response delay time: | 60 s |
| Max. permissible release delay time: | 30 s |
| Width: | 55 mm |
| Height: | 99 mm |
| Depth: | 112 mm |
| 1-phase undercurrent possible: | no |
| 3-phase undercurrent possible: | no |
| 1-phase overcurrent possible: | no |
| 3-phase overcurrent possible: | no |
| 1-phase window possible: | no |
| 3-phase window possible: | no |
| Includes DC voltage undercurrent function: | no |
| Includes DC voltage overcurrent function: | no |
| DC window function: | no |
| Current measuring range: | 8 to 80 A |
| Rated control supply voltage Us at AC 50 Hz: | 24 V |
| Rated control supply voltage Us at AC 60 Hz: | 24 V |
| Rated control supply voltage Us at DC: | 24 V |
| External current transformer: | no |
