Veris Industries H-308 Current Switch

The Veris Industries H-308 is a high-performance split-core current switch engineered for precision monitoring in building automation and industrial HVACR systems. Designed with a micro split-core housing, the H308 allows for rapid installation in tight electrical enclosures without disconnecting the monitored conductor. Its adjustable trip point, ranging from 0.75 to 50 A, provides the versatility needed to detect subtle load changes, such as belt loss, coupling shear, or mechanical failure in motors as small as 1/5 HP. This solid-state device features a self-gripping iris for effortless mounting and dual-status LEDs that give immediate local indication of the switch state, simplifying the calibration process for field technicians. With a standard normally open (N.O.) 1.0A @ 30 VAC/DC output, this sensor integrates seamlessly with DDC controllers and PLCs. The induced-power design eliminates the need for an external power supply, making it a reliable, high-density solution for fan status monitoring and overall equipment protection.

• Adjustable trip point (0.75A - 50A) allows for precise field calibration to match specific motor load profiles.
• Micro split-core design facilitates easy retrofit installation in cramped starter panels or junction boxes.
• Self-powered sensor draws operating energy directly from the monitored line, reducing wiring complexity and material costs.
• Status LEDs provide instant visual confirmation of current sensing and output state for faster troubleshooting.
• Polarity insensitive output ensures flexible and error-free connection to building management system (BMS) inputs.

How do I calibrate the H-308 for a specific load?
With the motor running at normal conditions, turn the 20-turn adjustment screw clockwise until the Status OPEN LED illuminates. Slowly turn the screw counter-clockwise until the Status CLOSED LED just turns on. Applying an additional 1/4 turn provides the necessary margin for reliable operation.

Can the H-308 be used on loads smaller than 0.75A?
Yes, for low-amperage applications, you can wrap the monitored conductor through the sensor window multiple times. This increases the magnetic field detected by the sensor, effectively lowering the trip point threshold relative to the actual load.

Is this switch suitable for VFD-driven motors?
The H-308 is designed for fixed-frequency 50/60 Hz circuits. For variable frequency drive (VFD) applications, it is typically used on the line side of the drive or replaced with a frequency-compensated model to ensure accurate status detection across the speed range.

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.