Westinghouse BA-400 116D977A19 Power Fuse Refill

Westinghouse BA-400 116D977A19 Power Fuse Refill is a medium-voltage expulsion fuse refill engineered to protect transformers, feeders, switchgear, and distribution circuits in industrial and utility power systems. This replaceable unit is rated for 7.2 kV (7200 volts) and 400E amps, operates at 50/60 Hz, and belongs to the BA-400 series with E-rated mid-voltage protection and standard speed for overcurrent and short-circuit events. It is compatible with Westinghouse BA-400 fuse holders and switchgear assemblies and features a vented construction suitable for indoor and outdoor installations in industrial, commercial, and utility environments. Common replacements in the market include Eaton BA Series MV fuse refills, Bussmann E-Rated MV Power Fuses, and ABB Medium-Voltage Expulsion Fuses.