Description
TimeMark A258B PhaseMonitor — 480V Phase Monitor Relay
The TimeMark A258B PhaseMonitor is a robust phase monitoring relay engineered to protect three-phase motors and equipment from the damaging effects of phase loss, phase imbalance, and phase reversal. Rated for 480V systems at 10A, this device is an essential safeguard for commercial HVAC compressors, pumps, fans, and other motor-driven equipment where three-phase power integrity is critical.
Key Features
- Rated operating voltage: 480V
- Current rating: 10A
- Monitors three-phase power for loss, imbalance, and reversal conditions
- Protects motors and compressors from costly phase-related failures
- Compact design suitable for panel mounting in commercial and industrial applications
- Relay output for integration with motor starters, contactors, and control circuits
Why Phase Monitoring Matters
Phase loss or imbalance in a three-phase system can cause motors to overheat, draw excessive current, and fail prematurely. The TimeMark A258B continuously monitors incoming power quality and trips the output relay when an unsafe condition is detected, disconnecting the load before damage occurs. This makes it an indispensable component in any HVAC or mechanical system relying on three-phase power.
Typical Applications
- Commercial HVAC compressors and condensing units
- Chiller and cooling tower motors
- Hydronic circulating pumps
- Air handling unit fan motors
- Industrial motor control panels
Specifications
- Brand: TimeMark
- Model / SKU: A258B
- Voltage Rating: 480V
- Current Rating: 10A
- Function: Phase loss, imbalance, and reversal protection
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