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[2013-02-19]
Electronic ballasts or device system can work normally in the electromagnetic environment electromagnetic disturbance ability can not afford and does not constitute anything in this environment. In Europe and the United States have different standards of execution. A. FCC (USAStandardClassA; ClassB) B. CISPR (International Electrotechnical Commission CISPR15) C. EN55015 (European standard). China will be performed in accordance with European standards....
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[2013-02-18]
Of course, through fog and strong high pressure sodium lamp, high pressure sodium light emitted wavelength longer than metal halide lamp, through fog better than the metal halide. So Highway Lighting ordinary uses high-pressure sodium lamps. From the economic point of view: high pressure sodium lamp life than metal halide about double the price is cheaper....
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[2013-02-18]
High-pressure Sodium lamp emitting principle is the use of sodium vapor generated by the discharge, sodium lamp radiation wavelength of the light focused on the more sensitive range of human visual sensation...
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[2013-02-17]
The power factor of fluorescent ballast " λ".
Although national standards do not set the lower limit of the rated supply voltage, rated frequency, and fluorescent lamp supporting line power factor λ ≥ 0.90.
Supply current harmonic content flag "L" or "H". fluorescent ballast and fluorescent lamps in the rated voltage to reach steady state, with the "L" and "H" logo electronic ballasts supply current harmonic content does not exceed the national standard GB / T 15144 and GB T 17263 provisions...
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[2013-02-17]
The rated output power of the fluorescent ballast or power matching lamps with electronic ballasts, model and carried by the tube counts. Lamp power should be matched with electronic ballasts, and some ballast called "connected with 16 ~ 40W fluorescent lamp", should not be optional. This ballast is impossible to satisfy the performance indicators of the fluorescent magnetic ballast carrying the best power is certain, it is impossible to adapt wide range....
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[2013-02-17]
Fluorescent ballasts appear burned out are caused due to a short circuit between coil turns, coil short circuit or excessive temperature rise caused. It is mainly due to: (1) of enameled wire has many pinhole (National Institute of Standards provisions allowed per meter pinhole ≤ 25 only) the enameled wire pinhole pinhole just on interturn, when the voltage is too high will to interturn short...
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[2013-02-17]
Leakage switch tripping reasons:
(1) wire load too much current is too large to cause tripping, this case based on the leakage current is to configure the number of lighting fixtures and hid ballast. The solution:
a increase line power factor (plus compensation capacitor)...
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[2013-02-17]
The fluorescent ballasts Load too much, the current large wire fever, the construction unit should according to Dengpan ballasts nominal current multiplied by 1.6 times Shun starting current design. Some experience in the construction units to design simple surface power, but only about 0.5 and each fluorescent ballast ignore the power factor of the inductor bracket about 8W loss....
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[2013-02-16]
High pressure sodium electronic ballasts should pay attention to:
Electronic ballast is composed of two or three hundred components, so pay attention to the following points:
(1), gently up and down
(2) pay attention to water
(3), the replacement should pay attention to hypertension; OFF and changing light bulbs then power to check the bulb damage; such as new lamp is not lit, then powered down to replace the electronic ballast and power...
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[2013-02-16]
High pressure sodium ballasts (electronic ballasts) advantages:
(1), small size, light weight, and the average time between failures of up to 35000h
(2) fluctuations in the grid voltage to ensure a constant output power, lighting smooth flicker-free extended lamp life by 20%
(3), using PFC correction technique, the current waveform is pure sine wave has no effect on the grid, a green lighting...
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