Customer asks if the 8430 MPS is a three phase monitoring device and , if so, why does it only have a SPDT contact?

Issue:
Are the 8430 MPS relays used on 3 phase monitoring?

Product Line:
Relays and Timers

Environment:
8430 Type MPS

Resolution:
Yes. It does monitor all 3 phases. If a single phase, phases reversal, phase unbalance or undervoltage condition is sensed the SPDT contacts change state. (This relays are now obsolete)

Released for: Schneider Electric USA