Lighting Contactor
How do i avoid the slow switching of a night switch?
i bought a night-switch, a switch operated by a light sensing resistor which allows the flow of current when it cannot sense sufficient amounts of light anymore, usually used in street lamps…
the problem is, when its dawn, there either enough light or not enough light… but somewhere in between the voltage readings are low then rises higher and higher as the sun sets, obviously, i cant use a fluorescent lamp here since it’ll endanger the ballast because of the low voltage parts at sun set or sun rise.
how do i solve this slow switching problem? a magnetic contactor fluctuates at this point. pls help! thanks!!
I would use a time-delay relay with a delay when the relay is de-energized.I would let light sensing resistor power the time-delay relay and power your light with the circuit powering the LSR, connected in parallel with the LSR.
To do this you must connect the hot lead to the LSR and to a normally open contact on the relay to power your light. Connect a wire between the other side of the LSR and to one side of the relay coil. Connect a wire to the other side of the relay contact and the lamp. Connect the neutral to one side of the relay coil and one side of the lamp.
The theory behind this is when the LSR allows enough voltage to reach the relay coil, it will energize the relay which will close the normally open relay contact and light the lamp. In the event the voltage fall to the relay , the coil will be de-energized, but the contact will remain closed until the time delay of the relay expires. The relay will be energized again when the voltage rises. Eventually, the ambient light level will fall to a point where the LSR will no longer be affected. The same chain of events will occur when the sun rises.
Get a time delay relay with a time delay of 15 to 30 minutes, long enough to allow the light level to fall and rise to the proper value.
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