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At what power factor do commercial 4 tube fluorescent fittings usually operate or can they vary?
It varies based on the ballast. Most ballasts nowadays are "power factor corrected" to try and compensate for the bad powerfactor in switching power supplies. The actual power factor of a individual fixture is entirely dependent on the circuit of the ballast, which changes from design to design.
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Electrical inductive motors, transformers and magnetic ballasts bring real power that are measured in kilowats and reactive power (measured in kilovolt-amperes reactive,… kvar). Real power genrates "productive" work. Reactive power does the the magnetic field required for inductive devices to operate.
How much power does a fluorescent fixture use with no tubes installed For example a switched on 8' fixture with a single tube with an old ballast.?
Depends if ballast is in fixture and switch is on. Several watts if new ballast and perhaps 15 watts for old ballasts....
A four tube fluorescent luminaire is just 4 separate fluorescent lamp circuits in one fitting. Look up 'how things work' etc to see a fluorescent lamp circuit.
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Inside the fluorescent fixture tie the two black wires and the two white wires of both ballasts together. Now take the black wire of the power cord and tie it into the black b…allast wires. Then take the white wire of the power cord and tie it into the white ballast wires. Take the green or bare ground wire and attach it to the green screw in the fluorescent fixture. The ground wire must be used to ground the fixture not only for grounding purposes but to helps to ignite the tubes. For the tubes to operate correctly they have to be within a one inch distance of a grounded surface.
You probably worded your question wrong, since the answer would be 40w. But I'll work out the charge to run it for you. I am working your questions using the MELBOURNE, AUSTRA…LIA power tariff (charge) which is 17.000c per kw/h. It takes roughly 25 hours for your 40w fluoro tube to consume 1 kilowatt of power, so the power consumption per hour would be around 0.0068 cents an hour. Please take note of other amounts of electricity that have to be used in order to fire up your tube though, as some starter capacitors can use a big amount of energy (this is the reason why it is not recommended to use fluoro bulbs on 12v/24v - 240v/110v inverters). So basically, if you are going to be out of the room for less than 1 hour, leave it on.
mercury vapor in the tube is ionized by electric current ionized mercury vapor emits UV light phosphor coating on inside surface of tube absorbs UV light becoming e…xcited excited phosphor coating emits visible light
Not enough to pop a balloon tthat is sitting beneath it.
Can you use 75 watt fluorescent tubes in 60 watt fixtures which is a different question because fluorescent lights do not operate as hot as incandescant bulbs?
You talk about tubes specifically so I assume the 60 watt fixture is also designed for tubes. In such a case you should not use a higher wattage tube. If you were to replace a… 60 watt incandescent bulb with a compact florescent of 75 watts you are correct that the heat would be less. If heat were the only de-rating factor you would probably be okay. Not sure how this is handled in the code.
Depends on how high it is off the floor. Make sure you buy a T8 andnot a T12. The T8 puts out more light and will operate at a lowertemperture. On a normal 8' ceiling a 2 bulb… T8 will cover around 36square feet of space. If the room is pretty large then an 8 foot 2bulb HO light is a much better choice.
The choke is used to give a surge of current during start up. This choke coupled with a relay (or sort of switch) will start to magnetize to its max capacity, once attained ma…ximum level, relay trips and the choke start to discharge thus providing initial surge of current need to light on the fluorescent tube.
the old ones with transformers you can correct with capacitors incandescent lamps have unity power factor the newer florescent ballasts are closer to unity but tend more t…owards capacitance
the 4fundamental operation is add,subtract,multiply addition
The starter should easily fit into the florescent fixture by sliding it into the hole and then securing it by twisting it in place. If you are having issues, you may need to …check to ensure that you have the correct size starter for your florescent tube.
Yes, there is no problem in transmitting capacitive VARs if they occur.
Does a fluorescent light fitting with 4 x T8 2' 18W tubes and a 48W ballast use all 120W when running?
No, a fluorescent light fitting with a 4xT8 2' 18W tube and a 48W ballast does not use all the 120W when running.