The Macromatic PMD120 is a multi-detection phase monitor relay. This DIN-Rail mount relay has a single adjustable nominal voltage range of 102-138V. It monitors against 5 different types of phase errors and has an output of 10A DPDT. The LED shows the current status and specifies a particular phase error. The PMD120 features a housing which is mountable on a 35mm DIN-Rail. Note: Image is an approximation. Actual part may differ.

Monitors For:

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

Specifications

• Relay Function- Multi-Detection
• Nominal Voltage- 102-138V AC
• Output- 10A DPDT
• Min. Voltage- 77V AC
• Max. Voltage- 152V 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: 1 - 300 sec adjustable
  Phase Loss & Reversal: 100ms fixed
  Phase Unbalance Normal: 0.3 - 30 sec adjustable
  Phase Unbalance Severe: 0.3 - 2 sec
  Undervoltage & Overvoltage: 0.3 - 30 sec adjustable
• Dimensions- 3.6" Height x 2.1" Width x 2.4" Depth
• Approvals- UL, CUL, CE

The PMD120 features "True RMS voltage measurement". This has analog to digital sensing circuitry that gives more precise monitoring of phases and voltages. A useful feature in the PMD120 is that it can still monitor all the voltages while indicating the fault, even if a phase is lost. When the right voltage is introduced and it has the proper phase sequence, 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 automatically once the error is fixed, unless the manual reset has been established.

Macromatic PMD Series Relay Installation Manual

Macromatic Three Phase Monitor Relay Comparison Chart

DIN Rail Mount Three Phase Monitor Relay PMD120