Issue:
Can Harmony 3 phase control relays be used upstream or downstream a Variable Speed Drive (VSD)

Product Line:
Harmony Control Relays

Environment:
RM17, RM22, RM35, 3 phase control relays

Cause:
It’s not recommended to operate the RM17/RM22/RM35 products with VFD or VSD systems as the noise interference from the VFD/VSD can cause damage to the contol relay.

Resolution:
Do not connect 3 phase control relay to monitor output of Variable Speed Drive (VSD).

Released for: Schneider Electric USA