Description

Product Highlight：

Comprehensive 3-Phase Monitoring: Tracks voltage levels across all three phases to detect under voltage and phase anomalies.

Customizable Protection: Adjustable under voltage thresholds and trip delays for tailored system protection.

Wide Frequency Range: Operates seamlessly within 45Hz to 65Hz, suitable for global power standards.

Clear Status Display: LED indicators provide instant feedback on relay operation and system health.

Efficient Installation: Compact 36mm width with DIN rail mounting for easy integration into control panels.

Model	GRV8-4UVS Three Phase Under Voltage Relay
Function	Under voltage
Monitoring terminials	L1-L2-L3-N
Supply terminals	L1-N
Rated supply voltage(Un)	220V/230V/240V
Rated supply frequency	45Hz-65Hz
Under voltage threshold	S:70%-95%of Un
Trip delay time(Tu)	0.1s
Hysteresis	5V
Measurement error	≤1%
Power on delay time(Td)	Adjustable: 5min-15min
Recovery delay time(Tr)	Adjustable: 5min-15min
Konb setting accuracy	10% of scale value
Supply indication	green LED
Output indication	red LED
Output	1×SPDT
Current rating	10A/AC1
Switching voltage	250VAC/24VDC
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(mm²）	solid wire max.12.5 or 21.5/with sleeve max.1*2.5（AWG 12）
Tightening torque	0.8Nm
Dimensions	90×18×64mm
Weight	63g,65g
Standards	EN 60255-1,IEC60947-5-1