microprocessor based a.c. controller, a.c. controller for atm, annunciator fascia, microprocessor based alarm annunciator, electronic hooter, compressor guard, electronic timer, digital panel, audio - visual panel for tel. exchange meters, digital 3-phase auto voltage / current scanner, india

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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 :

•	Microprocessor based A.C. Controller
•	Chiller Controller
•	Microprocessor based Alarm Annunciator
•	Compressor Guard
•	Digital Panel
•	Digital 3-Phase Auto Voltage/Current Scanner
•	Motor Protection Relays
•	Digital Panel Meter
•	AC / DC Power Monitor
•	Line Frequency Meter
•	AC Voltmeter
•	Voltage Scanner
•	Scanner
•	Temperature Indicator
•	A.C. Controller for ATM
•	Annunciator Fascia
•	Electronic Hooter
•	Electronic Timer
•	Audio-Visual Panel for Tel. Exchange Meters
•	Digital Temperature Indicators / Controllers
•	Custom Built Electronic Equipments
•	VAF Meters
•	RPM / Frequency Indicator
•	AC Ammeter
•	Three Phase / Single Phase Voltage Monitor
•	Process Indicator
•	Humidity Indicator
•	Fire Protection Panel

Voltage Monitoring Relay :

Protection of electrical devices against Over voltage, Under voltage in the supply is one of the major issue in electrical systems.

For safe running of electrical devices, special protections that keep a continuous watch on supply conditions are very essentials.

'PROTONs VMR 1P' offer following protections along with 3 digit display showing

R-N voltage in scanning mode with precise accuracy.
LOW/HIGH voltage tripping to ensure trouble free running of Loads.

SALIENT FEATURES :
•	Microcontroller based technology.
•	Voltage protection along with digital voltage readout.
•	Wide range of supply variation.
•	Protection against Under voltage.
•	Protection against Over voltage.
•	Password Protection for the set point.
•	All the set points setable by keys.
•	Indications for High voltage, Low voltage Relay ON & Timer indication .
•	No separate auxiliary supply required.

TECHNICAL SPECIFICATION :
Supply voltage	100-300 VAC, (No auxilliary supply)
Output Contacts	Two changeover (N/C-C-N/O),Rating 5A at 230VAC
Voltage trip setting	: 240 to 300 V For OV with digital display (resolution of 1 V) : 0 to 210 V For UV with digital display (resolution of 1 V) ( Hysterisis between cut off & cut in is 10V)
Trip Time delay	Trip time for UV :Settable Default : 5 sec. Range: 1 to 60 sec. for OV : Fixed 3 sec.
ON Delay	Selectable by keys from 1 to 60 sec.
Reset Mode	Auto reset.
Indications	TIMER : 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	95%
Mounting	Din rail. : Base mounting dimensions 55 (W) x 65 (L) x 125 (D) mm.

WORKING :

- In the normal run mode, display shows Phase to Neutral Voltage If there is no UV/OV fault then countdown of ON time for Relay will start on display & timer indication starts blinking & after that Relay will be ON & Phase to Neutral Voltage will be displayed continuously. If Over voltage/Under voltage fault occurs in the supply then Relay will be OFF & corresponding fault LED starts blinking.Hysterisis betwen Cut off & cut in is 10V