PHASE PROTECTION RELAY เฟสโพรเทคชั่น CM-MPS.41S ABB
CM-MPS.41S Three-phase monitoring relay

The CM-MPS.41S is a multifunctional relay from the CM three-phase monitors range. It
operates with a rated control supply voltage / three-phase measuring voltage of 300-
500 V AC 50/60 Hz and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A.
This relay monitors all phase parameters such as over/undervoltage, phase unbalance
and phase failure. The corresponding threshold values are adjustable. Phase sequence
monitoring as well as an ON or OFF tripping delay are selectable. The tripping delay is
adjustable over a range of instantaneous to 30 s (0, 0.1-30 s). A sealable transparent
cover for protection against unauthorized changes is available as accessory. The
device offers screw connection technology with double-chamber cage connection
terminals