Current Monitor Relay H548NS

Features

  • Remote mounted current status sensor and command relay without HOA switch
  • Combines status sensor, command relay in a single series circuit one line connection for three devices
  • Gang box mounting – mounts directly onto gang box, flush to existing enclosures and standalone
  • SPST relay is field-selectable for NO or NC operation
  • 1 hp at 120 VAC and 1.5 hp at 277 VAC one product for all fractional HP motor control and status applications
  • Induced from monitored conductor sensor power
  • Relay power LED
  • Status LED indicator
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Dpstar current monitor relay is a compact solution that integrates a load switching relay, current status switch, and HOA (hand-off-auto) switch into one remote-mounted enclosure. This setup is ideal for monitoring, controlling, and troubleshooting the wiring of fractional horsepower motors.

All three components—relay, current sensor, and HOA switch—are installed in a series configuration between the power source and motor. The design ensures efficient control while maintaining isolation between high- and low-voltage circuits. The unit supports flexible mounting on 2- or 4-gang junction boxes, within field enclosures, or as a stand-alone installation.

Dimensional Drawing

Wiring Diagram

Applications

  • Monitoring status and controlling small motor loads that are not driven by a motor starter or contactor
  • Exhaust fans
  • Unit ventilators
  • Fan terminal units
  • Fan coil units
  • Recirculating pumps

Specification

Model H548NS
Application Building Automation Systems
Current Measurement Range  0.25 – 15 A
Current Sensor type Current Transducer, AC, with Relay
Electrical Wiring Size  24 – 14 AWG (0.2 – 2.1 mm²)
Hand-Off-Auto   No
Measurement Type  AC Current
Monitored Wire Size 50 – 60 Hz
Mounting 4 x 4 Box
Operating Humidity 10 – 90% RH, non-condensing
Operating Temperature 5 – 104 °F (-15 – 40 °C)
Output Specifications N.O. 1 A @ 30 VAC/DC
Outputs Switch output
Product Certification UL
Product Type Sensor
Range Motor Control Series
Relay Coil Voltage None
Mechanical
Relay Contact Ratings None
Relay Poles/Throw None
Setpoint Adjustable
Warranty 5 years

Ordering Information

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