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[2013-05-12]
The dimming high pressure sodium ballast, Generally there are two types:magnetic ballast and electronic hps ballast. Inductive ballast made by the inductor coil and silicon steel loop non-closed-like, and leave a small gap, so that the magnetic field in a non-saturation, which play the role of stable current.Electronic ballast the name suggests it is a negative flow of electronic components devices, but also the implementation of energy-saving lighting products in recent years, it has low power consumption, small size, light weight, high power factor, instant start bulbs....
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[2013-05-11]
Instant start no preheating electronic ballast:
Instant start without preheating electronic ballasts, lighting the lamp instant start, due to the filament of the bulb-end is exposed to a sudden start voltage, not be long before the lamp filament is extremely easy to cut off, lamp life compared. According to tests, bright put out 35 seconds to 25 seconds, the number of points off only about 2000 to 3000.
Preheat start electronic ballasts:
Preheat start electronic ballasts, circuit design slow start, lighting the lamp for about 1-2 seconds when lit filament of the bulb-end is exposed only to slowly boost start-up voltage, lamp filament is not easy to be broken , the lamp is more long-lasting. According to tests, 35 seconds to 25 seconds put out bright points off the number can be as high as more than 15,000 times....
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[2013-05-11]
According to your requirements,electronic ballast frequency, output power, starting frequency, preheat frequency. For example, operating frequency 20KHZ output power of 20W, the start frequency of 30kHz, preheat frequency 100KHZ, high-frequency inductance value about in 3.5-4mH, inductor core needs to open about 1 mm air gap DC saturation current requirements in 1-1.5 a, you can. This is a key device, If the argument is slightly wrong, it will burn the switch, generally calculated values, it tested OK, and then determine the final parameters....
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[2013-05-10]
Energy-saving electronic ballast and the preheat start circuit.
(1) The necessity of energy saving ballast:
● fluorescent electric light source is a cathode preheat start;
● High pressure cold start, easy to damage the filament (sputtering), cathode wall early black and shorten lamp life;
● Preheat start, can reduce the start-up voltage (300 to 400V);...
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[2013-05-10]
Energy-saving electronic ballasts commonly known as energy-saving lamps circuit board or board skills. Refers to the power frequency (50Hz/60Hz) converting an alternating current high frequency alternating current, and make the normal start-up and stable operation of one or more fluorescent converter (foreign ballast)....
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[2013-05-10]
Generally speaking,the energy-savinglamp current, the same power lamp, energy saving lamp luminous efficiency than ordinary light, so in the case of the same power consumption, energy saving lamps than ordinary lights; need a "fixed value" brightness, and can achieve the required otherlighting fixtures, power consumption, of course, is the power consumption of energy-saving lamps to be smaller, energy-saving lamps is the truth. A long service life is more than five times that of the other lamps, the color is good, the lower the temperature of the working life, damage to the eyes is relatively small, which is why many have chosen lamp energy-saving lamps....
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[2013-05-09]
General understanding for the the: 400W ballast power factor is 95%, the electric power consumption of the 400W ballast itself is: 20W, that is set 400W metal halide light source has a power factor of the metal halide ballast,power consumption is about 40W, which is still relatively good brand of ballast,
W = Pt = 420W * 1H = 0.42KWH = 0.42 kWh. Basic is a half hour of electricity around...
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[2013-05-08]
The 13W PL tube ballast went bad. The PL tube ballasts is not easy to buy, do not know can not replace the T8 electronic ballast? Can drag 13W PL 22W T8 ballast tube?...
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[2013-05-08]
Fluorescent T8 fluorescent ballasts power parameters:
The 40W magnetic ballast power to 9W, 30W magnetic ballast power 8W, 20W magnetic ballast power 7W two numbers together to count the total power of each lamp.
Inductance coil in order to start using instant of power generated by high-voltage breakdown of mercury vapor lamp, the lamp begins to glow; the fluorescent ballast lamp starts using inductive reactance control lamp current, fluorescent low power factor Usually about 0.5....
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[2013-05-08]
Under normal operating conditions,the fluorescent ballast of the 20W and 40W are the same current, the lamp voltage compare is 1:2, the ballast reactance 20W 40W small. If the 20W magnetic ballast can drive 40W fluorescent lamp, difficulty in starting, start successful, the lamp voltage is lower than the rated value, low light, things will not burn. But the lamp is in this state work will filament temperature, affecting the the filament electron cloud generated long time, both ends of the tube to accelerate the black, lamp life shortened....
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