1, should not use ordinary magnetic ballast
The national standard GB50034-2004 stipulates that "straight tube fluorescent lamps shall be equipped with electronic ballasts or energy-saving magnetic ballasts". These two ballasts are superior in energy efficiency to conventional magnetic ballasts. The EU has also banned C-class products that are equivalent to this. China's national standard also clearly stipulates that it should not be used.
2. Application of electronic ballast
Electronic ballasts have obvious advantages in improving the energy efficiency and quality of lighting systems. They are products recommended by New International and are also the future development trend.
Selection suggestions:
(1) In places where continuous intense visual work places and visual conditions are required (such as design, drawing, typing, etc.), places where special quiets are required (ward, clinic, etc.) and places where young people view (classrooms, reading rooms, etc.) ) should be preferred.
(2) In places where dimming is required, a three-color fluorescent lamp with a dimmable digital ballast can be used instead of an incandescent lamp or a halogen lamp, which can greatly improve energy efficiency.
(3) High-quality, low-harmonic products should be selected. They should not simply pursue low prices. They should meet the technical requirements for use, consider the operation and maintenance effects, and make comprehensive comparisons.
(4) When using less than 25W fluorescent lamps, as mentioned above, the harmonic limits specified in the GB17625.1-2003 standard are very wide. If used in a large number of buildings, it will lead to various adverse consequences. Effective measures should be taken to limit the design.
(5) The selected product should not only be investigated for its total input power, but also its output luminous flux. According to regulations, the ballast factor (μ) using the ballast should not be lower than 0.95. The EU has specified the energy efficiency rating of the ballast, and the lumen factor μ ≥ 0.96 is also specified accordingly.
3 Energy-saving magnetic ballast application
The main advantages of energy-saving magnetic ballasts are high reliability, long service life, low harmonic content and low price. In addition to special requirements for vision, they can be widely used, and are also recommended products of China's standards.
Selection suggestions:
(1) There is no clear limit on the power consumption of energy-saving and common-type magnetic ballasts. Some manufacturers advertise their own products as energy-saving, but do not give power consumption values ​​or give false data. Due to the lack of assessment, it is difficult to check. The energy efficiency rating of the aforementioned EU is very clear. These manufacturers are marked as B1 or B2 products and have been verified by the National Testing Center.
(2) Some products provide total input power, but the output luminous flux is not tested, and users often do not pay attention or are difficult to test. Attention should be paid to the requirement that the lumen factor is greater than 0.95. What we are pursuing is to save electricity, but we must never save light.
(3) Power factor compensation should be considered, including single lamp compensation or line centralized compensation.
4, straight tube fluorescent lamp ballast
Effect of straight tube fluorescent ballasts on the implementation of the "Lighting Power Density (LPD)" limit
Chapter 6 of GB50034-2004 specifies the “Lighting Power Density (LPD)†maximum limit indicator and is issued as a mandatory provision. This provision is undoubtedly very positive and effective for implementing China's energy conservation policy.
In order to implement this indicator, various measures must be taken comprehensively, including reasonable determination of illumination levels and scientific lighting engineering design, but the rational selection of lighting equipment, including light sources, lamps and ballasts, is a very important factor. Among them, the light source is the first element. Take the most widely used straight tube fluorescent lamps as an example. If the high-efficiency T8 trichromatic fluorescent lamp (36W) and the T8 halogen powder fluorescent lamp are used, the former can increase the luminous efficiency by 30% when the same color temperature is cold; the former installation power is reduced by 23% for the same illumination (of course, if T8 three The base fluorescent tube can be reduced by about 32% compared to the conventional T12 halogen powder tube.
So, how much influence does the ballast have on the LPD value? Take the T8 fluorescent lamp (36W) as an example. If you use the most energy-efficient high-quality, low-loss electronic ballast (equivalent to the European standard A2), compared with the ordinary magnetic ballast (equivalent to the European standard C), the system input power is reduced by 20%, that is, lighting installation Power can be reduced by 20% and actual LPD values ​​can be reduced by 20%. Using an ultra-low-loss magnetic ballast (equivalent to the European standard B1), the lighting installation power can be reduced by 8.9% compared to a conventional magnetic ballast, ie the actual LPD value can be reduced by 8.9%.
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