Load Controls PH-3A Three-Phase Power Sensor

The Load Controls PH-3A is a high-performance three-phase power sensor designed for industrial equipment monitoring. Using Hall-effect technology, it directly measures true power (watts or horsepower) without the need for external current or voltage transformers. This eliminates phase-shift errors at low power factors and provides accurate load measurement for motors, pumps, conveyors, and other machinery.

Real-Time Load Monitoring

The PH-3A's 15 ms response time allows it to capture dynamic load changes, making it suitable for detecting machine overloads, tool wear, and process variations. The analog output can be connected directly to PLCs, DCS systems, or chart recorders for continuous monitoring. The adjustable time delay prevents nuisance alarms during momentary load spikes. The sensor's compact design and direct connection method simplify installation in existing control cabinets.

Application Domains

The Load Controls PH-3A is used in machine tool monitoring for optimizing energy usage, in pump control to detect dry-running or impeller wear, in conveyor systems to detect material jams, and in research and development for power measurement experiments. It is particularly suitable for applications where external current transformers are impractical or where variable frequency drives are present.