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Alarm Annunciators, Electronic Components, Process Control Instruments, Industrial Automation System, Microprocessor Based A.C. Controllers, Timers, Preventers, Microcontroller Based A.C. Controllers, Digital Panel Meters, Current Scanners, Digital Temp.Indicators & Controllers, Motor Protection Relays, Custom Built Electronic Equipments, RPM / Frequency Indicators, Line Frequency Meters, AC VoltMeters, AC Ammeter, Voltage Scanner, Humidity Indicators
 
 
Manufacturers of :
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Microprocessor based A.C. Controller
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Chiller Controller
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Microprocessor based Alarm Annunciator
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Compressor Guard
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Digital Panel
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Digital 3-Phase Auto Voltage/Current Scanner
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Motor Protection Relays
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Digital Panel Meter
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AC / DC Power Monitor
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Line Frequency Meter
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AC Voltmeter
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Voltage Scanner
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Scanner
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Temperature Indicator
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A.C. Controller for ATM
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Annunciator Fascia
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Electronic Hooter
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Electronic Timer
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Audio-Visual Panel for Tel. Exchange Meters
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Digital Temperature Indicators / Controllers
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Custom Built Electronic Equipments
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VAF Meters
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RPM / Frequency Indicator
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AC Ammeter
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Three Phase / Single Phase Voltage Monitor
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Process Indicator
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Humidity Indicator
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Fire Protection Panel
 
 
 
 
Three Phase Voltage Monitoring Relay - VMR 3P :
Three Phase Voltage Monitoring Relay
Three Phase Voltage Monitoring Relay
 
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 maxium 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 LVM 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.
 
SALIENT FEATURES :
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Microcontroller based technology.
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Voltage protection along with digital voltage readout.
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Wide range of supply variation.
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 Unit will also work if any one phase is present.
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Protection against Under voltage.
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Protection against Over voltage.
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Single Phasing & Reverse Phasing protection.
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All the set points setable by keys.
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Phase unbalance protection.
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Trip Delay for Under voltage & Unbalance is settable
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Reverse Phasing Protection can be able to bypass through settings.
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Indications for Low voltage , High Voltage, SPP & Relay ON .
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Message Display for SPP, Reverse Phasing & Unbalance Faults.
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No separate auxiliary supply required.
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Hold feature:- Press INC key in Running condition to observe particular supply voltage.
 
TECHNICAL SPECIFICATION :
Supply voltage
 3 Phase 415 VAC, 50 Hz (R,Y,B &N) (No auxilliary supply)
Output Contacts
 Two changeover ( C-NO),Rating 5A at 230VAC
Voltage trip setting : Lower Limit is 340 for Under voltage (Resolution of 1 Volt)
: Upper Limit is 460 Volts for OV (resolution of 1 V)
( Hysterisis between cut off & cut in is 10V)
Trip Time delay Trip time Less than 100msec.for SPP, Reverse Phasing
& Over Voltage
Trip Time is settable for Under Voltage & Unbalance..
ON Delay Selectable by keys from 1 to 60 sec.
Reset Mode Auto reset.
Indications SPP : RED LED
OVER VOLTAGE : RED LED
UNDER VOLTAGE: RED LED
RELAY ON : GREEN LED
Keys [ SET ] FUNCTION key, To select a set point function.
  [ /\ ] INC key, To increment set point.
  [ \/ ] DEC key, To Decrement set point.
Operating Temperature range -5 0C to 60 0C.
Relative Humidity 10 to 95%
Mounting Din rail. : Base mounting dimensions
55 (W) x 65 (L) x 125 (D) mm.
 
WORKING :
In the normal run mode, display shows Voltages Vry,Vyb,Vbr for 10 sec. each
If the supply is within the range then On Timer starts decrementing on display
& after Set On Time over Relay will be ON.

If Over voltage,Under voltage or spp/reverse phasing/unbalance occurs in the supply then Relay will be OFF & corresponding

fault LED starts blinking.
Hysterisis betwen Cut off & cut in is 10V

- Hold feature:- Press INC key in Running condition to observe particular supply voltage. To go into scroll mode press INC key again.