| Brand | MV Switchgear Accessories |
| Model NO. | Twilight Switch GRB8 |
| Rated frequency | 50/60Hz |
| Series | GRB8 |
The GRB8 series is a control module that automatically switches on and off circuits based on ambient light intensity. By using a built-in precision photosensitive sensor to detect environmental brightness, the relay action can be automatically triggered under a set threshold, which is widely applicable to electrical equipment that requires linkage control of lighting conditions, achieving intelligent operation of "start at dark and stop at dawn".
Application of GRB8 series optical control relay products:
1. Intelligent public lighting
Widely used in lighting systems for public areas such as residential corridors, underground garages, and factory passages, achieving energy-saving control of "lights on when people come, lights off when people leave" and reducing operation and maintenance costs.
2. Outdoor equipment light sensing start stop
Automatically control outdoor lighting facilities such as street lights, courtyard lights, and landscape light strips, synchronize the timed opening and closing of advertising light boxes and neon signs, enhance commercial image, and optimize energy consumption.
3. Security linkage system
Cooperate with monitoring equipment, electronic fences and other security devices to automatically activate equipment operation in low light environments at night, strengthening the security guarantee of the venue.
4. Agricultural environmental regulation
Applied to greenhouse lighting systems, livestock and poultry breeding lighting, etc., it intelligently adjusts artificial light sources based on natural light intensity to assist in precision agricultural production.
5. Equipment automation
Suitable for vending machine displays, traffic signs, photovoltaic energy storage devices, etc. that require day night mode switching, achieving efficient energy utilization.
Advantages of GRB8 series optical control relay products:
1. Environment adaptive: Built in high-sensitivity photosensitive element, accurately responding to natural lighting changes
2. Flexible regulation: supports seamless switching between manual and automatic modes to meet diverse control needs
3. Space friendly: ultra-thin body design, saving electrical installation space
4. Safe and reliable: Compliant with mainstream electrical standards, compatible with globally applicable voltages
5. Status visualization: intuitive LED indication, real-time monitoring of equipment operation status
| Technical parameters | GRB8-01 |
| Function | Twilight switch |
| Supply terminals | L-N |
| Rated supply voltage | AC 110V-240V |
| Rated supply frequency | 50/60Hz |
| Burden | max 2VA |
| Supply voltage tolerance | -15%;+10% |
| Illumination rang | 1-100Lx |
| Function | ON-AUTO-OFF |
| Supply indication | green LED |
| Tolerance sensor | ±35% |
| Delay time | 2min |
| Output | 1×SPDT |
| Current rating | 1×16A(AC1) |
| Switching voltage | 250VAC/24VDC |
| Min.breaking capacity DC | 500mW |
| Output indication | red LED |
| Mechanical life | 1×107 |
| Electrical life(AC1) | 1×105 |
| 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 cathegory | 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 | 0.8Nm |
| Dimensions | 90×18×64mm |
| Weight | 65g |
