6668D37A12 Relay by Westinghouse

Westinghouse Bus Differential Relay Overvoltage Unit 75-300 Volts, Overcurrent Unit 3-48 Amps, LO Tap 3-12 Amps, HI Tap 12-48 Amps, Indicator 0.2-2 Amps, Internal Schematic 3510A44 CAT # 6668D37A12