Veris Industries H-748 Current Switch

The Veris Industries H-748 Current Switch is a professional-grade adjustable AC current monitoring switch and integrated mechanical SPDT relay designed for demanding BAS and HVAC automation. This solid-core current sensor provides precise status indication for motors, fans, and pumps by detecting current flow from 1 to 135A. Unlike basic sensors, the H-748 combines a current-sensitive switch with a command relay, allowing technicians to use a single device for both proof-of-operation and equipment control. Each unit features an adjustable setpoint to prevent false trips caused by belt slippage or mechanical failure, ensuring accurate load monitoring. The compact housing supports easy installation in tight electrical panels, while the 24 VAC/DC relay coil compatibility makes it a standard choice for building automation systems and motor control centers. This model, also known as the H748, is essential for identifying locked rotors or under-current conditions in industrial environments.

Key Benefits for Contractors

• Dual-Function Design: Consolidates current sensing and a 10A SPDT relay into one device, reducing wiring time and enclosure space.
• Wide Adjustable Range: Field-adjustable setpoint from 1A to 135A ensures compatibility with a broad spectrum of fractional and integral horsepower motors.
• Solid-Core Reliability: Features a high-integrity solid-core current sensor housing for long-term stability in high-vibration HVACR applications.
• Precise Troubleshooting: LED indicators provide immediate visual feedback for unit power and contact status.
• Broad Compatibility: Seamlessly integrates with direct digital control (DDC) systems and HVAC current monitoring protocols.

Common Questions

Is the H-748 compatible with Variable Frequency Drives (VFDs)?
Yes, this switch is designed to monitor the line side of a VFD or the load side of most standard motor starters. For VFD applications, ensure the frequency remains within the 50-60 Hz range for optimal accuracy.

What is the maximum wire size for the sensor window?
The internal iris accommodates monitored conductors up to 0.7 inches (18 mm) in diameter, which typically supports up to 3/0 AWG wire depending on insulation thickness.

Can the relay be used to pilot a motor directly?
The integrated mechanical SPDT relay is rated for resistive loads up to 8A at 250VAC. For higher horsepower motor loads, it should be used as a pilot duty device to trigger a larger contactor.

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.