The Macromatic PMDU is a multi-detection phase monitor relay. This DIN-Rail mount relay has an adjustable universal nominal voltage of 190-500V. It monitors against 5 different types of phase errors and has an output of 10A DPDT. The LED indicates the status and identifies a particular phase error. The voltage knob has two ranges. The low voltage ranges from 190-250V, while the high voltage ranges from 380-500V. When voltage is introduced, the unit automatically chooses the correct range. The PMDU features a housing which is mountable on a 35mm DIN rail.

Monitors For:

• Phase Loss
• Phase Reversal
• Phase Unbalance
• Undervoltage
• Overvoltage

Specifications

• Relay Function- Multi-Detection
• Nominal Voltage- 190-500V AC
• Output- 10A DPDT
• Min. Voltage- 156V AC
• Max. Voltage- 550V AC
• Power Consumption- Less than 40VA
• Phase Loss- Trips on Phase A, B or C loss
• Phase Reversal- Trips if rotation is something other than A-B-C
• Phase Unbalance- Adjustable from 2-10% unbalance,
  Trips when one of the 3 lines diverges from the average of all 3 by more than the adjusted set point for longer than the adjusted delay
• Undervoltage- Adjustable from 80-95% of nominal voltage,
  Trips when the average of all 3 lines is less than the adjusted set point for longer than the adjusted delay
  Resets at +3% of the undervoltage trip setting
• Overvoltage- 110% of nominal voltage,
  Trips when the average of all 3 lines is greater than the fixed set point for longer than the adjusted delay
  Resets at 107% of the nominal voltage setting
• Operating Temperature- -28 C to 65 C (-18 F to 149 F)
• Storage Temperature- -40 C to 85 C (-40 F to 185 F)
• Output Contacts- 10A @ 277V AC/30V DC, 1/2 HP @ 120/240V AC(N.O.), 1/3 HP @ 120/240V AC (N.C.)
  B300 Pilot Duty, R300 (N.O)
• Life- Mechanical: 10,000,000 Operations,
  Full Load: 100,000 Operations
• Response Time- Restart After Fault: 1 - 300 seconds
  Phase Loss & Reversal: 100ms
  Phase Unbalance Normal: 0.3 - 30 seconds
  Phase Unbalance Severe: 0.3 - 2 seconds
  Under/Overvoltage: 0.3 - 30 seconds
• Dimensions- 3.6" Height x 2.1" Width x 2.4" Depth
• Approvals- UL & CUL Listed, CE

The wide voltage range on the PMDU makes it useful for a greater number of applications. As part of the PMD series, the PMDU has "True RMS voltage measurement". This features analog to digital sensing circuitry that gives more precise monitoring of phases and voltages. Another particular feature to the PMDU is that it can still monitor all the voltages while indicating the fault, even if a phase is lost. When the voltage and phase sequence is right, the relay becomes energized after the Restart Delay is finished. When an error is detected, the relay is de-energized after a delay, and will re-energize once the error is fixed.

Macromatic PMD Series Relay Installation Manual

Macromatic Three Phase Monitor Relay Comparison Chart

Macromatic PMDU Universal Voltage Phase Monitor Relay