Star Engineering

• 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.
• This product detects such Conditions & protect the load from burn out.
• PROTON's Protection Relay' offers above protections along with 3 digit display showing R-Y,Y-B,B-R voltages in scanning mode with precise accuracy.
• LOW/HIGH voltage tripping to ensure trouble free running of 3-phase Loads.
• Microcontroller 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 settable by keys
• Phase unbalance protection.
• Trip Delay for Under voltage & Unbalance is settable
• 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 Upward Arrow key in Running condition to hold the scrolling of Phase to Phase supply voltages
• Neutral Protection feature i.e. If one of the phase get connected to neutral then there will be no damage to the unit.
• After Power ON, display shows Phase to Phase Voltages for the duration of 10 sec. each following the messages r-y, y-b,b-r respectively in a scrolling manner.
• If the Input supply is within the range of the fault limits then On Timer starts decrementing on display & after Set On Time over Relay will be ON with RLY indication glowing.
• If Over voltage,Under voltage, Spp/Reverse phasing/Unbalance occurs in the supply then Relay will be OFF after the trip delay of that particular fault & corresponding fault LED starts blinking.
• Hysterisis between Cut off & cut in for Under Voltage,Over Voltage& Unbalance faults is 10V
• If any Phase to Phase Voltage reduces below UV set point,Relay will trip after set trip delay over. If that paticular phase to phase voltage increases above ( UV set point + 10 V), Relay will be ON after the set reset delay over.
• If any Phase to Phase Voltage increases above OV set point,Relay will trip after trip delay (<100 ms)over. If that paticular phase to phase voltage reduces below ( OV set point - 10 V), Relay will be ON after the set reset delay over.
• If any Phase to Phase Voltage increases/reduces above/below the UB set point compared to other two Phase to Phase voltages,Relay will trip after set trip delay over.If that paticular phase to phase voltage reduces/increases below/above (UB set point -/+ 10 V),Relay will be ON after the set reset delay over.
• If any of the Phase fails,Relay will trip after trip delay (<100 ms) over. If all phases are present,Relay will be ON after the set reset delay over.
• If Phase sequence is changed to R-B-Y/Y-R-B/B-R-Y,Relay will trip after trip delay (<100 ms) over. If phase sequence is corrected to R-Y-B,Relay will be ON after the set reset delay over.
• As there is common indication for UB/SPP/REVP,Display will show the messages 'ub FLt','SPP FLt' & 'rP FLt' for the respective faults following the P-P Voltages in scrolling manner. WORKING

We offer an extensive range of VMR 3P Voltage Monitoring Relay to our customers. These are developed using the premium quality material and advanced technology.