Overview
The Westinghouse 1875267A CO-8 overcurrent relay is a proven protection device for medium-voltage industrial and commercial applications. This relay combines adjustable overcurrent sensing with inverse-time protection characteristics, making it suitable for coordinated protection schemes in electrical distribution and control panels. The model operates on AC current and features an indicator contact switch for visual and electrical confirmation of trip events.
Key Features
- Inverse Time Curve: Provides time-delayed protection that coordinates with upstream and downstream protective devices, reducing nuisance trips while ensuring fault clearing
- Indicator Contact Switch: 0.2-2 Amps switch rating enables reliable signaling and control integration in industrial systems
- AC Current Type: Designed specifically for AC circuits in power distribution and motor control applications
- 4-12A Overcurrent Range: Adjustable tap settings allow field calibration to match circuit protection requirements
- Compact CO-8 Package: Space-efficient design fits standard industrial relay sockets and panel installations
Technical Specifications
- Overcurrent Rating: 4-12 Amps adjustable
- Indicator Contact Switch: 0.2-2 Amps
- Current Type: AC
- Relay Type: CO-8 Overcurrent
- Time Curve: Inverse
- Style Number: 1875267A
- Manufacturer: Westinghouse Electric
Typical Applications
- Feeder and branch circuit protection in industrial power distribution systems
- Motor protection and control circuits requiring coordinated time-delay operation
- General-purpose AC electrical system protection in commercial facilities and data centers
- Legacy switchgear and control panel upgrades where CO-8 type relays are specified
Compatibility & Replacements
Compatible With
- Westinghouse electrical distribution equipment and switchgear
- Standard industrial relay bases and sockets designed for CO-8 type relays
- AC control circuits operating at 50/60 Hz frequency
- Multi-phase power distribution systems requiring overcurrent sensing
Replaces / Drop-In Replacement For
- Original equipment specification Westinghouse 1875267A units
- Direct replacement in existing control panels and switchgear systems using CO-8 relays
- Substitute for OEM application where CO-8 inverse-time overcurrent protection is required
Works With
- Westinghouse and third-party protective relay control schemes
- Electromechanical timer circuits and trip circuits common in vintage industrial control systems
- AC distribution and motor control equipment from the mid-to-late 20th century
- Standard electrical protective device coordination studies using inverse time curve data
