Overview
The Westinghouse 1875267A is a classic CO-8 type overcurrent protection relay designed for industrial switchgear and protective systems. This relay operates at 60Hz and provides precise overcurrent protection in the 4-12A range with an inverse time curve characteristic. Built to industrial standards for reliability and repeatability, the 1875267A remains a trusted component in legacy and modern electrical distribution systems.
Key Features
- Type CO-8 Overcurrent Relay: Purpose-built for overcurrent sensing and protection in industrial electrical systems.
- Adjustable Pickup Range: 4-12A overcurrent unit with inverse time curve for coordinated protection.
- Indicator Contact Switch: 0.2-2A indicator contact switch for signal and alarm applications.
- Fast Response Instantaneous Unit: Selectable instantaneous trip range (41-101A) for protection against severe faults.
- AC 60Hz Operation: Rated for standard North American power frequency.
- Robust Industrial Construction: Time-tested design proven in switchgear and motor control applications.
Technical Specifications
- Overcurrent Pickup Range: 4–12A
- Frequency: 60Hz
- Current Type: AC
- Relay Type: CO-8 Overcurrent Protection
- Time Curve: Inverse Time
- Indicator Contact Switch: 0.2–2A
- Instantaneous Unit Range: 41–101A (selectable)
- Contact Configuration: Indicator contact for external signaling
- Country of Origin: United States
- Part Number: 1875267A
Typical Applications
- Industrial motor control and overload protection
- Switchgear protective relaying
- Feeder and transformer overcurrent coordination
- Legacy electrical distribution system upgrades
- Short-circuit and fault detection in medium-voltage circuits
Compatibility & Replacements
Compatible With
- Westinghouse medium-voltage switchgear (Type CO, Class C breaker frames)
- Industrial protective relay panels and control schemes
- Electromechanical relay sockets and terminal blocks
- Time-overcurrent coordination studies and protective device settings
Replaces / Drop-In Replacement For
- Other Westinghouse CO-8 1875267A units
- Verify compatibility with your system integrator before ordering for cross-manufacturer replacements.
Works With
- Electromechanical relay protection schemes
- AC power systems at 60Hz
- Switchgear control and protection circuits
- Overcurrent coordination software for relay setting calculations
