When the output power P of the transformer is equivalent to the input power P the efficiency & ETA; Equivalent， the transformer will not cause loss. But in fact， there is no such transformer. Transformer always causes loss when transmitting electromagnetic energy. The key of this kind of loss is copper loss and iron loss. Copper loss refers to the loss caused by the number of turns of transformer coil. When the current has a fever according to the number of turns of the coil， part of the electromagnetic energy changes into energy and is lost. Because the electromagnetic coil is generally wound by copper core wire with insulating layer， it is called copper loss.
9Relevant responsible persons of the transformer Federation of China Household Appliance Industry Association show that the development prospect of transformers in China in the future is still the development trend of environmental protection， low noise fire safety and explosion-proof and high reliability. There are two key development prospects: one is the development trend of high voltage and high voltage，Products Show especially kV and kV. The second is the development trend towards environmental protection，Wave ordinaryScb13 dry type transformer with secondary energy efficiencyThe performance of resistance to carbide precipitation energy conservation and miniaturization. The former key is applied to the long-distance substation project route， and the latter key is applied to the substation project route in big cities.
cKuilapaIn specific daily life， oil immersed transformers are released outward in the form of waves. This kind of wave is like a tide. It is also a kind of kinetic energy. In fact， the wave height of oil immersed transformer also shows the size of kinetic energy. Generally， computer automatic system is used to control the wavelength and frequency of electromagnetic wave. The longer the light wavelength is， the greater the output power is. On the contrary， it is very small.
Many people probably dont know much about the power distribution transformer manufacturers. In fact， the transformer can be plugged in for trial operation after careful inspection before capital investment. During the trial operation period， you must pay attention to the following points. Whether there is abnormal sound，Products Show noise and vibration， whether there is abnormal smell such as coke smell， and whether there is discoloration caused by partial overheating. Ventilation is good. In addition， we should also pay attention to the following aspects.
LEstolPower saving analysis of transformers has always been based on whether the utilization rate of transformer capacity is less than a certain standard value. Whether transformers are environmental protection and energy saving specifications. In fact， sometimes such specifications are not saving electromagnetic energy， but consuming electromagnetic energy.
ZvOil sample inspection & mdash; & mdash; the performance parameters such as compression resistance and residue shall be carried out every three years. The long-term overload or overload of the transformer can reduce the cycle time.
The fundamental reason for this kind of inaccuracy is that when the transformer & ldquo; Dalar trolley & rdquo; is considered according to the size of capacity utilization rate， the high-capacity transformer must be replaced by the small-capacity transformer with high utilization rate， and then the iron loss is considered and the copper loss is ignored. In fact， for a certain load， the active power loss of small capacity exceeds that of large capacity The active power loss of the transformer，Products Show so it consumes electromagnetic energy.
The efficiency of transformer is closely related to the output power level of transformer. Generally， the greater the output power，Wave ordinaryScb13 dry type transformer with secondary energy efficiencyThe performance of resistance to carbide precipitation the smaller the loss to output power ratio and the higher the efficiency. On the contrary， the smaller the output power， the lower the efficiency.
mThe plastic shells of electrical products and office supplies are equipped with grounding wires. If the insulation layer is damaged and the shell is energized， the electric flow will leak into the earth along the installed grounding wires， otherwise it will have an adverse impact on life safety.
OThe appropriate power saving calculation formula should be derived from the following process: active power loss of large capacity transformer: load of large capacity transformer; PDK - short-circuit fault loss of large capacity transformer， kW. Active power loss of small capacity transformer: when a pump room is in normal operation， and each pump is driven by kW motor， its output voltage is directly proportional to the coil turn ratio of the output input solenoid coil. If a rechargeable battery is used because it is DC，Power transformer price: 1000KVA, 33kV, 25kV, power transformer, oil immersed transformer, dry-type transformer factory add a circuit in the input power supply circuit to change it into a continuously changing voltage. In that way， the alternating DC current can be obtained at the output end.
How to make up oil for oil immersed transformer?
Installation requirementshThe rate of transformer is: n = P / pxo%， that is， when the copper loss of transformer is equivalent to iron loss， the rate is very large. Therefore， the load of transformer is: = P / PK. Fully consider the active power loss caused by the transmission of reactive power in the system software during transformer operation. The load adjustment is: it can be seen from the calculation of load formula that the large rate of transformer does not occur when the load is full， Generally， it is about %， but when selecting the transformer capacity， we should select effective transformers according to the load condition and load， so as to make the transformer in the situation of economic development and achieve the goal of power saving.
VThe noise of dry-type transformer comes from
At that time， only a few companies in China could produce kV high-voltage transformers， and the market share of high-voltage transformers was basically monopolized by overseas leaders.
iKuilapaIn order to promote the use of energy-saving transformers the Ministry of finance， the Ministry of industry and information technology and the national development and Reform Commission jointly promulgated the detailed rules for the promotion and implementation of energy-saving distribution transformers of energy-saving products benefiting the people project as early as ， providing subsidies of - yuan / KVA for energy-saving transformers.
qNDry type transformer， a static electrical equipment， is used to change the AC current (current) of a certain standard value into another or several types of working voltage (current) with the same frequency and different standard values. According to the supervision sampling inspection data released by AQSIQ in the third quarter of last year， among the kinds of dry-type transformer commodities produced and manufactured by companies in provinces and municipal districts across the country， kinds of commodities were found to be inconsistent with the provisions of relevant specifications， with a compliance rate of %& ldquo; This result mostly shows the quality level of Chinas dry-type transformer industry at the present stage.
The grounding resistance of， high voltage and bottom voltage shall not be less than % (m & omega;) of the original value. The difference between the three-phase mean value of winding resistance measurement at the same temperature shall not exceed %， which shall not exceed % compared with the last accurate measurement result.