MDF Frequency Relay by ABB

MDF-1, MDF-2, MDF-3, MDF-4, AKA 1344D82A42B (and other part numbers)

Under/Over frequency relay. We are now set up to repair these.

ABB MDF-4 pictured

All MDF relays receive a burn-in and are accompanied by a test report.

If you have any questions, please email, or call us at 800-330-5409