Overview
The Blumberger PFD 3x(200-460V~) phase sequence relay is an industrial safety relay engineered to monitor three-phase AC mains and detect harmful power conditions that could damage motors and driven equipment. Operating across a flexible 200–460V input range, this relay provides essential protection against phase loss, phase reversal, phase asymmetry, and related faults that occur in industrial electrical systems.
Key Features
- Wide voltage range: Rated for 200–460V AC, 3-phase input, compatible with global industrial standards (220V, 380V, 440V, 460V systems)
- Phase sequence detection: Monitors proper phase rotation and detects reversed or missing phases
- Compact industrial design: Suitable for control panel and motor-starter installations
- Reliable fault response: Outputs relay contact to de-energize circuits when faults are detected
- Used, fully functional: Thoroughly tested and ready for immediate deployment in maintenance and upgrade applications
Technical Specifications
- Input voltage: 3-phase AC, 200–460V, 50/60 Hz
- Series: PFD (Phase Failure Detection)
- Configuration: 3x (three-phase monitoring)
- Mounting: DIN rail compatible (industrial standard)
- Output contact: Relay contact (typically SPDT or equivalent)
- Application: Phase sequence and phase failure monitoring
- Condition: Used, tested and functional
Typical Applications
- Three-phase motor protection and starter circuits
- Industrial pump, compressor, and fan control systems
- Emergency generator and backup power systems
- Manufacturing plant and process automation equipment
- Water treatment and HVAC systems requiring phase integrity
- Retrofit and spare-parts replacement in aging industrial facilities
Compatibility & Replacements
Compatible With
- Three-phase AC power systems rated 200–460V, 50/60 Hz
- Industrial motor starters and soft-starter control circuits
- PLC and automated control systems with dry-contact relay inputs
- Manual and automated plant control panels
- Emergency shutdown (E-stop) and interlocking circuits
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or facility maintenance records before ordering. The Blumberger PFD series is used as a general-purpose 3-phase monitoring relay in many industrial facilities; contact our technical team for specific cross-reference information.
Works With
- Dry relay contacts (NO/NC) for integration with programmable logic controllers (PLCs)
- Hardwired motor control and starter circuits
- Industrial automation systems requiring phase-sequence interlocking
- Alarm and monitoring systems for three-phase power integrity
