Description
Overview
The Time Mark A257B is a 480V 3-Phase Voltage Monitor engineered to safeguard motors, compressors, and other critical HVAC and industrial equipment from damaging power supply conditions. Designed for demanding commercial and industrial environments, this monitor continuously supervises three-phase power lines to detect and respond to abnormal voltage events before they cause costly equipment failures.
Key Features
- Rated for 480V 3-phase power systems
- Monitors for phase loss, phase imbalance, phase reversal, and undervoltage conditions
- Provides automatic protection to prevent motor and compressor damage
- Compact, panel-mount design suitable for electrical enclosures and control panels
- Relay output for integration with contactors, starters, and control circuits
- Fast response time to minimize equipment exposure to fault conditions
Applications
- HVAC compressor and motor protection
- Commercial refrigeration systems
- Industrial pump and fan motor circuits
- Building automation and electrical control panels
Why Choose the Time Mark A257B
Phase-related power problems are among the leading causes of premature motor and compressor failure. The Time Mark A257B delivers continuous, reliable three-phase voltage monitoring at 480V, helping technicians and facility managers protect valuable equipment investments and reduce unplanned downtime. Its straightforward installation and robust relay output make it a go-to solution for HVAC professionals and electrical contractors alike.







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