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3 Phase Voltage Relay GRV8-03 to 08

Function Features -Controls its own supply voltage(True RMS measurement). -Set 8-level rated operating voltage through knob. – Measuring frequency range:45Hz-65Hz. – Voltage measurement accuracy<1%. – Relay status is indicated by LED. – 1-MODULE,DIN rail mounting.


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SKU GRV8-03 to 08 Category



  • Control for connection of moving equipment(site equipment,agricultural equipent,refrigerated trucks).
  •  Control for protection of persons and equipment against the consequences of reverse running.
  • Normal/emergency power supply switching.
  • Protection against the risk of a driving load(phase failure).


1.GRV8-03+GYHC-40 wiring diagram 2.GRV8+GYHC-16 wiring diagram

Technical parametersM460M265
FunctionMonitoring 3-phase voltage
Monitoring terminalsL1-L2-L3L1-L2-L3-N
Supply terminalsL1-L2L1-N
Voltage range220-230-240-380-400-415-440-460(P-P)127-132-138-220-230-240-254-265(P-N)
Rated supply frequency45Hz-65Hz
Measuring range176V-552V101V-318V
Threshold adjustment voltage2%-20%of Unselected
Adjustment of asymmetry threshold5%-15%
Phase failure value70% of Un selected
70% of Un selected
Time delayAdjustable 0.1s-10s,10%
Measurement error≤1%
Run up delay at power-up0.5s time delay
Konb setting accuracy10% of the scale value
Supply indicationgreen LED
Output indicationred LED
Reset time1000ms
Current rating10A/AC1
Switching voltage250VAC/24VDC
Min. breaking capacity DC500mW
Temperature coefficient0.05%/℃,at=20℃(0.05%℉,at=68℉)
Mechanical life1×107
Electrical life(AC1)1×105
Operating temperature-20℃ to +55℃(-4℉ to 131℉)
Storage temperature-35℃ to +75℃(-22℉ to 158℉)
Mounting/DIN railDin rail EN/IEC 60715
Protection degreeIP40 for front panel/IP20 terminals
Operating positionany
Overvoltage categoryIII.
Pollution degree2
Max.cable size(mm 2)solid wire max.1×2.5or 2×1.5/with sleeve max.1×2.5(AWG 12)
Tightening torque0.8Nm
Weight  61g-66g
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