Caliber 3-Phase Monitoring Relay is suitable for 3-phase without neutral mains. It has been designed and manufactured in small size with high accuracy and capable of protecting loads from wrong phase sequence, phase loss, phase unbalance and under voltage, over voltage.

MODEL: 3PHMR1

WEIGHT: 100g

DIMENSION: 87.8H x 54.2D x 17.5W

PROTECTION GRADE: IP20

• Implemented microcontroller based system for tighter control of the input power.

• Protection against:

  • Overvoltage and Under voltage

  • Phase Imbalance

  • Phase Sequence error

  • Phase Failure.

• Potentiometer’s:

  • PM 1: On delay Adjustment

  • PM 2: Over Voltage Adjustment

  • PM 3: Under Voltage Adjustment

  • PM 4: Phase Asymmetry Adjustment

• LED indication’s:

  • Phase sequence/Phase loss/Unbalance and under voltage and over voltage conditions.

3PHMR1 is suitable for all applications where it is necessary to monitor phase presence, correct phase sequence and Under voltage, Over Voltage of three phase load mains such as lifts, escalators, HVAC, material handling, conveyors, pumps and compressors.

Caliber can support with following protection devices:

• Overvoltage/overcurrent protection.
• Surge protection.
• In-rush protection.
• Arcing detection and protection.
• Earth fault detection and protection.

• 3Ph monitoring.
• From 208V to 480V rated input.
• Phase sequence, Phase loss, Phase unbalance, Under voltage, Over voltage.
• 5A SPDT relay output.
• DIN Enclosure

• Supply voltage: 183 V to 528 VAC /50-60 Hz
• Delay:

  • On delay: 2-180 sec

  • Off delay: Disconnection for Under voltage after start : 5 sec, Disconnection for Over voltage and Phase Asymmetry after start : 3 sec

• Over Voltage detection: 400V - 480V

• Under Voltage detection : 300V - 380V

• Phase Imbalance detection: 20V - 100V

• Output: 8A relay output.