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3 Phase Display Voltage Monitoring Relay GRV8-SN

Function Features -Controls its own supply voltage(True RMS measurement). -LCD display. – Measuring frequency range:45Hz-65Hz. – Voltage measurement accuracy<1%. – 2-MODULE,DIN rail mounting.


SKU GRV8-SN Category



  • Control for connection of moving equipment(site equipment,agricultural equipment,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).


Technical parameters GRV8-SN GRV8-SP
Function Monitoring 3-phase voltage
Monitoring terminals L1-L2-L3-N L1-L2-L3
Voltage range(Un) 127-132-138-220-230 -240-254-265(P-N) 220-230-240-380-400 -415-440-460(P-P)
Rated supply frequency 45Hz-65Hz
Supply voltage limits 70V-400V 130V-650V
Measurement error ≤1%
hysteresis 2%
Phase failure 50% of Un selected
Time deviation ≤5%
Temperature coefficient 0.05%/℃,at=20℃(0.05%℉,at=68℉)
Output 2×SPDT
Current rating 8A/AC1
Switching voltage 250VAC/24VDC
Min.breaking capacity DC 500mW
Mechanical life 1×107
Electrical life(AC1) 1×105
Operating temperature -20℃ to +55℃(-4℉ to 131℉)
Storage temperature -35℃ to +75℃(-22℉ to 158℉)
Mounting/DIN rail Din rail EN/IEC 60715
Protection degree IP40 for front panel/IP20 terminals
Operating position any
Overvoltage category III.
Pollution degree 2
Max.cable size(mm 2) solid wire max.1×2.5or 2×1.5/with sleeve max.1×2.5(AWG 12)
Tightening torque 0.4Nm
Dimensions 90×36×64mm
Weight 100g 109g

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