| Brand | HK Electrical |
| Model NO. | GRT8-S1 Asymmetric Cycler Timer Relay |
| Rated frequency | 50/60Hz |
| Voltage range | 12-240V |
| Series | GRT8 |
The GRT8-S1 Asymmetric Cycler Timer Relay is a reliable timing control device designed for diverse cyclic operation needs. It excels in scenarios like regular room ventilation, ensuring fresh air circulation at set intervals. For cyclic dehumidification, it maintains optimal humidity levels by activating dehumidifiers periodically.
It also enables precise light control, automating on-off cycles for lighting systems. Additionally, it’s ideal for regulating circulating pumps and triggering noon signs, offering stable performance and easy integration for various industrial and commercial applications.
Asymmetric Cyclic Control: Supports independent setting of on and off time periods, flexible adapting to scenarios requiring unequal cyclic intervals like ventilation and dehumidification.
Wide Application Range: Suitable for regular room ventilation, cyclic dehumidification, light control, circulating pumps, noon signs and other cyclic operation equipment.
Stable Performance: Adopts reliable electronic components, ensuring accurate timing and consistent operation even in long-term working conditions.
Easy Operation: With intuitive parameter setting interface, users can quickly adjust timing values without complex professional knowledge.
Function choice is done by an external jumper of terminals S-A1.
Time scale 0.1 s – 100 days devided into 10 time ranges:(0.1 s–1 s / 1 s–10 s / 0.1 min–1 min / 1 min–10 min / 0.1 hrs –1 h / 1 hrs–10 hrs / 0.1 day –1 day /1 day –10 days /3 days–30 days / 10 days–100 days).
Relay status is indicated by LED.
1-MODULE, DIN rail mounting.
| Technical parameters | GRT8-S1 | GRT8-S2 | |
| Function | Asymmetric cycle time relay | ||
| Supply terminals | A1-A2 | ||
| Voltage range | AC/DC 12-240V(50-60Hz) | ||
| Burden | AC 0.09-3VA/DC 0.05-1.7W | ||
| Voltage range | AC 230V(50-60Hz) | ||
| Power input | AC max.6VA/1.3W | AC max.6VA/1.9W | |
| Supply voltage tolerance | -15%;+10% | ||
| Supply indication | green LED | ||
| Time Ranges | 0.1s-10days | ||
| 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 | 1×SPDT | 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 | 1×SPDT:W240-63g,A230-62g | ||
| 2×SPDT:W240-83g,A230-82g | |||
| Standards | EN 61812-1,IEC6947-5-1 | ||
Login
