Voltage Frequency Monitoring Relay (VFR 3P) :

Protection of 3 Phase devices against Over voltage, Under voltage, Single Phasing, Over Frequency, Under Frequency, 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. VFR3P detects such Conditions & protect the load from burn out. 'PROTON's VFR 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, And also protection is provided against Over /Under Frequency

THREE PHASE VOLTAGE MONITORING RELAY- VFR 3P Features :

• Voltage protection along with digital voltage readout.
• Over Frequency/ Under Frequency protection along with digital Line Frequency readout.
• Wide range of supply variation.
• Unit will also work if any one phase is present.
• Protection against under voltage.
• Microcontroller based technology.
• Message Display for SPP, Reverse Phasing & Unbalance Faults.

Salient Features :

• Protection against Over voltage.
• Phase unbalance protection.
• Trip Delay for Under voltage & Unbalance is settable
• Reverse Phasing Protection can be able to bypass through settings.
• Single Phasing & Reverse phasing protection..
• No separate auxiliary supply required.
• All the set points settable by keys.
• Hold feature:- Press INC key in Running condition to observe particular supply voltage.