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Delay ON Star/Delta Timer Relay GRT8-ST

Function Features -Time t1 (star) : time scale 0.1 s – 10min divided into 4 time ranges rough time setting by rotary switch. -Time t2 (delay) : time scale 0.1 s – 1 s time setting by potentiometer – Relay status is indicated by LED. – 1-MODULE, DIN rail mounting.

SKU GRT8-ST Category



  • Designated for delay ON of motors star/delta.


Technical parameters GRT8-ST
Function Delay ON star /Delta
Supply terminals A1-A2
Voltage range AC/DC 12-240V(50-60Hz)
Burden AC 0.3-2VA/DC 0.1-1.2W
Voltage range AC 230V(50-60Hz)
Power input AC max.6VA/1.3W
Supply voltage tolerance -15%;+10%
Supply indication green LED
Time ranges Range of time delay t1:0.1s-10min,Switch time t2:0.1s-10s
Time setting potentiometer
Time deviation 10%-mechanical setting
Repeat accuracy 0.2%-set value stability
Temperature coefficient 0.05%/℃,at=20℃(0.05%℉,at=68℉)
Output 2×SPDT
Current rating 16A(AC1)
Switching voltage 250VAC/24VDC
Min. breaking capacity DC 500mW
Output indication red LED
Mechanical life 1×107
Electrical life(AC1) 1×105
Reset time max.200ms
Operating temperature -20℃ to+55℃(-4℉to131℉)
Storage temperature -35℃ to+75℃(-22℉to158℉)
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 90×18×64mm
Weight W240-82g,A230-80g
Standards EN 61812-1,IEC6947-5-1

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