Veris H-934 VFD Current Switch with SPST Relay Split-Core Auto-Calibration 3.5-135A

The Veris H-934 Hawkeye 934 is a microprocessor-based current monitoring switch designed specifically for accurately monitoring motors controlled by variable frequency drives (VFDs). This intelligent device stores sensed amperage values for normal operation at various frequency ranges in non-volatile memory, allowing it to distinguish between normal amp draw reductions due to frequency changes and abnormal drops caused by belt loss or mechanical failures.

Key Features:

• Auto-calibration with self-adjusting trip point factory programmed to detect belt loss and undercurrent conditions
• Split-core design ideal for retrofits - no need to remove conductor during installation
• Current range: 3.5-135A AC, frequency range: 20-75 Hz
• Integrated SPST normally open relay isolated from current switch with externally accessible connections
• LED status indicator for rapid troubleshooting showing normal and alarm conditions
• Automatically compensates for frequency and amperage changes associated with VFDs
• Secondary setpoint option at 50% of originally measured current for nuisance reduction
• Status output: N.O. 0.1A at 30VAC/DC maximum
• No calibration required in live starter enclosures - install and go
• Versatile mounting bracket with three installation configurations

This combination current switch and relay package saves valuable space and installation time in building automation systems and industrial applications. Ideal for monitoring positive motor status, replacing pressure switches, and detecting belt loss or coupling shear on VFD-driven equipment. Backed by a 5-year limited warranty and made in the United States.