Veris Industries H-904 Current Switch

The Veris Industries H-904 (also known as the H904) is a high-performance, split-core current switch engineered specifically for variable frequency drive (VFD) applications. Unlike standard sensors that struggle with the fluctuating output of a VFD, this microprocessor-based current sensor automatically monitors both frequency and amperage to distinguish between normal operational changes and mechanical failures. By storing normal amp draw profiles across various frequency ranges in non-volatile memory, the Hawkeye 904 accurately identifies belt loss or coupling shear even when the motor is running at reduced speeds. This advanced VFD current monitoring device eliminates the need for manual calibration in live starter enclosures, significantly reducing installation time and increasing safety for field technicians. With its self-adjusting trip point and nuisance reduction feature, the H-904 current switch provides a reliable N.O. solid-state output for seamless integration into building automation systems and industrial motor control circuits.

• Automatic VFD Compensation: Intelligent microprocessor tracks frequency shifts between 20Hz and 75Hz to ensure accurate status reporting.
• Retrofit Friendly: The split-core design allows for fast installation on existing conductors without disconnecting power lines.
• Reliable Belt Loss Detection: Precisely detects a drop in current of 50% or more, indicating a broken belt or sheared coupling.
• Self-Powered: Induced power from the monitored conductor means no external power supply is required for the sensor or its output.
• Flexible Mounting: Includes a multi-position bracket for DIN rail mounting or surface attachment in tight electrical enclosures.

• Does the H-904 work with all VFD frequencies? Yes, it provides power-on status from 20Hz to 34Hz and full mechanical failure detection (belt loss) from 34Hz up to 75Hz.
• Can I use this for staged pump applications? No, the Veris H904 is specifically designed for VFD loads and is not intended for staged pump or variable inlet vane applications.
• How do I handle currents below 3.5 Amps? If your motor draw is below the 3.5A minimum, wrap the conductor through the sensor window multiple times to increase the sensed amperage.

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.