Digital Promoters
Digital Promoters


  • Based on latest single chip microcontroller technology.
  • Compact design for reliable and accurate operation.
  • Fast response time.
  • Field selectable operational sequences.
  • Incorporates a group of super bright LED's instead of twin Filament lamps for ultimate life at very less power consumption.
  • Actuated thro' potential free fault input contacts.
  • Fault input contacts NO/NC site selectable by means of DIP switches.
  • Opto-isolated all fault inputs, immune to noise disturbances.
  • Provision for external audible (Bell or Hooter) thro' potential free relay output contact.
  • All models are with built-in Test, Silence(optional), Accept & Reset push buttons, provision on back side terminal strip.
  • Specially designed power supply for high noise immunity,
  • Wide input variations & having built-in transient protection.
  • The extensive protection so provided safeguards all I.C.'s & components from failure, thereby offering complete reliability.
  • Rugged Plastic/Metal enclosure with high strength.
  • Type tested for noise, impulse and functional test as per various standards.

Available in:

4 Window, 6 Window, 8 Window, 10 Window, 12 Window, 16 Window, 18 Window, 20 Window


Voltage Monitoring Relay Single Phase ( Model VMR 1P)

Voltage Monitoring Relay Model (Model VMR-3P)

Protection of 3 Phase devices against Over voltage, Under voltage, Single Phasing, Reverse Phasing & unbalance supply are one of the major issue in electrical systems. For safe running of 3-phase devices, special protections that keep a continuous watch on supply conditions are very essential. The major cause of maximum load burn-out is overloading which occurs due to unbalance supply, Single Phasing & Reverse Phasing conditions. VMR3P detects such Conditions & protect the load from burn out. PROTON's VMR 3P' offer above protections along with 3 digit display showing R-Y,Y-B,BR voltages in scanning mode with precise accuracy. LOW/HIGH voltage tripping to ensure trouble free running of 3-phase Loads.

  • Micro controller based technology.
  • Voltage protection along with digital voltage readout.
  • Wide range of supply variation.
  • Unit will also work if any one phase is present.
  • Protection against Under voltage.
  • Protection against Over voltage.
  • Single Phasing & Reverse Phasing protection.
  • All the set points stable by keys.
  • Trip Delay for Under voltage & Unbalance is stable.
  • Reverse Phasing Protection can be able to bypass through settings.
  • Indications for Low voltage , High Voltage, SPP & Relay ON .
  • Message Display for SPP, Reverse Phasing & Unbalance Faults.
  • No separate auxiliary supply required.
  • Hold feature: Press INC key in Running condition to observe particular supply voltage.
Due to continuous development more products are being added periodically, please contact us for products not listed here.

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