Westinghouse 1247219 Potential Transformer Fuse

The Westinghouse 1247219 BAL-PT-FUSE is a 15 kV, 0.5 A medium-voltage potential transformer fuse that provides primary-side overcurrent protection for instrument transformers, metering circuits, and protective relaying systems. Used in utility substations, switchgear lineups, distribution networks, and metering compartments, it protects PTs and VTs from fault currents while preserving system reliability. Key specifications include a 130,000 A interrupting rating and 50/60 Hz operation, making it suitable for high-fault-capacity instrument transformer circuits. The fuse is designed for installation on switchgear and metering compartments and is compatible with PTs and VTs within industrial, commercial, and utility power systems. Intended for PT and control power transformer protection, it is categorized as a BAL-PT-FUSE for instrument transformer protection. Common replacements include Eaton PT Protection Fuse, Bussmann Medium-Voltage PT Fuse, and S&C Instrument Transformer Protection Fuse.