Digital Energy Protection & Control Auxiliary Relays HMA Hinged Armature Auxiliary Relay
Protection & Control Online Store
Protection & Control Support
Protection & Control Press Room
  Support Documents
  Application Notes
HMA Hinged Armature Auxiliary Relay

HMA Hinged Armature Auxiliary Relay

The Type HMA relay is an instantaneous auxiliary device whose contacts are opened and closed by the movement of a hinged armature.

Type HMA Century Series auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation and other auxiliary functions.
The Century Series coil design provides longer operating life than previous designs as a result of changes in the entire coil insulation system.

Features and Benefits
  • Front or back connected
  • Molded Textolite case
  • Applications
  • Contact multiplication
  • Protection and Control
  • High speed pickup
  • Self-resetting