GFK 3 light depended relay
Designation
Dimming switches type GFK 3 are designed to automatically turn on the various lights in the evening and turn them off at sunrise.
Operation:
In daylight, the relay inside the device is deenergized. As soon as the light intensity falls to below the adjusted value, it is energized and a circuit is made. The cycle taking place when the light intensity increases is reversed. The circuit is made with a certain delay in order to prevent any unnecessary disconnections due to short-term increases in the light intensity (such as f. in. caused by lightning.)
Adjusted value of the light intensity is 10 – 25 lux by factory, but in order can be delivered with values between 5 and 40 lux.
Rated control circuit voltage: 230 V 50 Hz
Power consumption: max. 5 VA.
Degree of protection: IP 54
Dimensions: 90×90×130 mm
(Diameter of the bell : 80 mm)
Relevant standard: EN 60669
