Precautions for trial operation of power transformer manufacturers
2In 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.
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，Product display noise and vibration，chatelet Oil immersed transformer refueling videoWhat are the skills in winter 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.
RShangyuThe person in charge of a transformer manufacturer said that because of the hazards of raw materials and other factors， the cost of energy-saving transformers is significantly higher than that of traditional transformers， and the price factor is also a key factor endangering the popularization and marketing promotion of energy-saving transformers. Although there are energy-saving and convenient subsidy projects to help energy-saving transformers the sales market has not been fully operated.
MqAt rated power， the ratio of output power to input power of transformer is called the efficiency of transformer， i.e. & ETA; Is the efficiency of the transformer; P is the input power and P is the output power.
Protection mode for type selection of dry-type test transformer
Protection mode for type selection of dry-type test transformer
rFrom the appearance， the packaging types are different. The transformer core and electromagnetic coil can be seen immediately for dry-type transformer， and only the shell can be seen for oil immersed transformer;
KWhen the output power P of the transformer is equivalent to the input power P，Product display the efficiency & ETA; Equivalent， 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.
IdetailsThe transformer manufacturer will introduce the efficiency of the transformer to you
cTThe rate of transformer is: n = P / pxo%， that is， 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 the rate is very large. Therefore， Generally， it is about %， but when selecting the transformer capacity， we should select effective transformers according to the load condition and load，Product display so as to make the transformer in the situation of economic development and achieve the goal of power saving.
The visual inspection method is that the staff use human eyes to observe the appearance change of the visible parts of the operating equipment to find out the abnormal conditions of the equipment， such as discoloration，chatelet Oil immersed transformer refueling videoWhat are the skills in winter deformation， offset， cracking， loosening， ignition and smoke oil leakage and oil leakage， broken strand disconnection， short-circuit fault marks， etching and turbidity，Power transformer price: 1000KVA, 33kV, 25kV, power transformer, oil immersed transformer, dry-type transformer factory etc. can be checked according to the visual inspection method. Therefore， visual inspection is one of the common methods of equipment inspection.
What is the cause of power transformer core failure?
Installation workspSeveral detection methods for installing transformer
YWhen the manufacturer of the power transformer samples from the automobile oil tank， after opening the sealing cover， use the cleaned and dry rubber plug to the oil， at the same time， clamp the branch pipe with the thumb， loosen the thumb to make the oil enter the pipe， then clamp the branch pipe with the thumb， clearly put forward the glass test tube， rotate and release the oil in the pipe to clean the sampling tube， Carry out this for times， although dry-type transformer has strong moisture resistance， it is generally open structure or very susceptible to moisture， especially the insulation level of dry-type transformer manufactured in China is low (lower flame retardant grade) Therefore， the dry-type transformer can obtain high stability only when the air humidity is below %. The dry-type transformer shall also be prevented from stopping operation for a long time to prevent serious damp. When the grounding resistance value is less than / V (operating voltage)， it indicates that the transformer is seriously damp， and the trial operation shall be terminated.
xJillThe dry-type transformer used for power plant voltage transformation is different from the oil transformer. It is strictly prohibited to lead the way at the bottom voltage side to prevent the transmission overvoltage caused by overvoltage at the power grid side or lightning stroke from penetrating the insulation layer of the dry-type transformer.
pQDry 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 top and middle of the transformer oil tank， the flange plate， barrel skin and the middle of the waterproof sleeve at the upper end of the automobile oil tank. The internal iron core and winding clamp are hot due to partial magnetic leakage， resulting in insulation damage.