Energy in the total energy consumption in buildings occupied by the ratio between 60% to 90%, the majority of civil electrical energy consumption is about 80%. One source of this part of the energy is electrical equipment. Although the electrical equipment required for the construction industry, mostly low-voltage equipment, but the large number of very versatile. To improve equipment operating efficiency, saving energy, industry sources pointed out the need to improve three aspects.

Equipment, backward technology

China's current economic growth is more dependent on high energy relative to foreign producers, the production value of the business units of energy consumed much higher than abroad, because of energy-saving technologies and electrical equipment are not advanced enough, and not enough intensive industrial production , production costs are very high, making the Chinese enterprises in the international market competitiveness is not enough, and the high energy consumption and lead to more serious waste of energy, extreme impact on the level of the sustainable development of enterprises. Although many of the larger companies, but its internal technology and equipment did not keep up with the level of expansion, there are still a lot of backward production capacity devices consume a lot of power resources in the production process at the same time, increasing the difficulty of maintenance of electrical equipment . Therefore, the application of energy-saving technologies for electrical equipment is the need for upgrading.

Mounting points set unreasonable

Placed harmonic control equipment and reactive power compensation equipment can improve the compensation effect to some extent in the electricity metering of the electrical equipment. Has a significant effect of energy-saving equipment according to the installation location will effect electrical theory, harmonic control and reactive power compensation device through the device to absorb and compensate harmonics and improve the power factor and harmonic current components of the standard power supply, to form a the state's electricity prices preferential conditions. The equipment is installed in a different location, reactive power compensation and harmonic current device will still appear additionallosses, energy-saving effect can not play.

Economic and technical analysis does not fully

Energy-saving transformer load rate is usually between 60% and lowest 70%, which is generally a lot of transformer load rate reduction workshop will within this range in order to reduce equipment wear and tear. Because the transformer load is calculated using the coefficient method, so the load factor and is usually proportional to the transformer if simply considering the selection from the load side, will make the load through the calculated rate is significantly higher than the actual load rate. Thus, calculated according to the cost of the transformer, which becomes damaged electricity capacity plus basic fees, transformers and related depreciation charges and other repair and maintenance costs, the cost will greatly exceed the projected results. Thus the cost of the transformer when a comprehensive analysis of the problem, not only need to include the cost of damage indicators change, but also to deal with the economic optimization of the cost of the transformer discounted, analysis on this point is not in place, making the loss of the transformer, though low, but the economic benefits are still obvious.