Load guard relay for 3-phase motors using Cos Phi (power factor) monitoring. Detects mechanical overload, under-load (dry run), and locked rotor conditions by monitoring changes in the motor’s power factor. 1CO 8A@250VAC output, 400VAC, 11 pin plug-in. Commonly used for pump protection (dry run), crusher and mixer overload detection, and conveyor belt jam monitoring.
Note: Requires ZB11 11-pin relay base socket (sold separately). For DIN rail retention, add CMAC Spring Clip. For combined power monitoring with start/trip delay, see the RP91.
Comadan RP81 Load Guard Relay – 3-Phase Motor Protection, 11 Pin
Description
Load guard relay for 3-phase motors using Cos Phi (power factor) monitoring. Detects mechanical overload, under-load (dry run), and locked rotor conditions by monitoring changes in the motor’s power factor. 1CO 8A@250VAC output, 400VAC, 11 pin plug-in. Commonly used for pump protection (dry run), crusher and mixer overload detection, and conveyor belt jam monitoring.
Note: Requires ZB11 11-pin relay base socket (sold separately). For DIN rail retention, add CMAC Spring Clip. For combined power monitoring with start/trip delay, see the RP91.