Phase unbalance protection relay LPMR/AUX

phase sequencephase lossthree-phase

• Phase unbalance monitoring • Detects incorrect phase sequence and phase loss • Wide 3-Phase voltage range 190 – 600VAC • Auxiliary supply – 24VAC • No user adjustments – Easy to install/set-up • SPNO output @ 24VAC • 17.5mm wide, DIN Rail mount Designed for the protection of screw and scroll compressors against phase unbalance, loss and reversal, the product monitors a wide three-phase supply used to power the load but in addition, is powered itself from a separate 24VAC auxiliary supply. For the relay to energise, the auxiliary supply must be connected and the all phases present, in the correct sequence and within the operating parameters specified. If any of these conditions are not met, the relay will de-energise. Specification • Monitoring function: Phase Unbalance, Sequence + Loss • Monitored supply voltage: 190 – 600VAC • Phase unbalance loss/threshold: 67.5V +/- 2.5V* • Phase unbalance reset level (Hyst.) 6.5V ± 1.5V below trip level • Time delay (from fault): < 200ms • Auxiliary supply: 24VAC +/-25% • Output: SPNO 6A (24VAC) • Dimensions(mm): W:17.5 x H:89 x D:66.5