Veris Industries H-548 Current Switch

The Veris Industries H-548 (also recognized as the H548) is an industrial-grade Hawkeye current switch designed for fractional HP motor status monitoring and control. This combination current sensor and relay integrates a status sensor, a command relay, and a Hand-Off-Auto (HOA) switch into a single series-circuit housing, significantly reducing wiring complexity for HVAC motor control. The unit features an adjustable trip point from 0.5 to 20A, allowing technicians to calibrate the device for precise belt loss detection or mechanical failure sensing in equipment like unit ventilators and exhaust fans. The SPST relay is field-selectable for normally open (N.O.) or normally closed (N.C.) operation and is rated to switch 1 HP at 120 VAC. With current-induced power, the relay requires no additional external power source for sensor operation, and the built-in manual override switch provides local control for troubleshooting and maintenance.

• All-in-One Integration: Combines a current status sensor, 24 VAC/DC command relay, and HOA switch to eliminate the need for multiple separate components in a junction box.
• Precise Set-Point Calibration: Features an adjustable amperage range from 0.5 to 20A, ideal for identifying low-load conditions like fan belt failure.
• Field-Selectable Logic: The SPST command relay can be toggled between N.O. and N.C. modes via an onboard jumper to match specific control system requirements.
• Simplified Diagnostics: Built-in LED status indicators provide immediate visual feedback for sensor power, relay status, and current trip point reaching.
• Versatile Mounting: Designed for gang box mounting, with flexibility for flush-to-enclosure or standalone installations in building automation systems.

Can the HOA switch be used for manual motor testing?
Yes, the Hand position on the HOA switch allows a technician to override the control system and power the motor locally for troubleshooting, while the Off position ensures the motor remains de-energized.

How do I adjust the trip point for belt-loss detection?
While the motor is running normally, rotate the set-point screw until the status LED indicates a closed contact. You can then fine-tune it to ensure the switch opens if the load drops below the 0.5A threshold during a mechanical break.

Does this unit require a separate power supply for the current sensor?
No, the H-548 current sensor is induced-powered directly from the monitored conductor. However, the command relay requires a 24 VAC/DC coil voltage signal from your controller for automated operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.