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.
iVeron In terms of the place of use，33kV power transformer dry-type transformers are mostly used in & ldquo; Fireproof and explosion-proof type & rdquo; It is easy to use in large and medium-sized engineering buildings and multi-storey buildings; The oil immersed transformer because of & ldquo; Accident & rdquo; The engine oil is likely to spray out or leak after the fire，OtrukovichTransformer seriesmanufacturer and most application places leading to fire accidents are easy to choose in large and medium-sized engineering buildings and multi-storey buildings;
During the operation of the transformer， the resistance value of the grounding wire shall be measured accurately every two years.
GKampong QingyangIf the input of dry-type transformer is an alternating switching power supply， 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， 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.
IxAccurately measure the resistance of each phase winding and carry out the measurement. If there is a great difference， it is a common fault of the winding. Then carry out the appearance inspection of the iron core， and then accurately measure the inter chip insulation resistor by AC voltage and galvanometer method. If the damage is not large， paint the damaged part.
Protection mode for type selection of dry-type test transformer
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，33kV power transformer such as discoloration， deformation， offset， cracking， loosening， ignition and smoke， broken strand disconnection， short-circuit fault marks， hanging of dirty things， etching and turbidity，33kV power transformer etc. can be checked according to the visual inspection method. Therefore visual inspection is one of the common methods of equipment inspection.
oIn the case of using dry-type transformer， customers must master the method of wiring. If there are problems in wiring，OtrukovichTransformer seriesmanufacturer it is easy to cause common faults in application. So， what is the wiring mode of dry-type transformer?
OTransformer manufacturers generally adopt IP protective casing， which can avoid the entry of solid dirt with a diameter of more than mm， rats， snakes， cats， birds and other animals， resulting in vicious common faults such as short-circuit fault and power failure，Power transformer price: 1000KVA, 33kV power transformer, 25kV power transformer, power transformer, oil immersed transformer, dry-type transformer factory IP protective casing can be adopted， which can avoid being equally divided with the above IP protective effects However， IP casing will reduce the refrigeration capacity of the transformer， so pay attention to the reduction of its operating volume.
VExcellent qualityThe transformer manufacturer said that the temperature display equipment: the temperature change value is measured according to the PT temperature sensor embedded in the bottom voltage winding to immediately indicate the winding temperature of each phase (three-phase safety inspection and Zui large value indication， and the historical time Zui high temperature can be recorded). The Zui high temperature can be input and output as mA analog quantity. If it is to be transmitted to a distance (the distance can reach m， the electronic computer can be equipped with an electronic computer socket， and transformers can be detected. The over temperature alarm and trip of the system software can also be signaled by the resistor data of Pt thermistor sensor， so as to further improve the stability of the temperature maintenance system software.
qMIt should be said that after the development trend of these years， the overall level of Chinas transformer industry at this stage is basically international and the quality level is no different from that of overseas goods& rdquo; The person in charge of the transformer Federation of China Household Appliance Industry Association said.
It can be seen from the above that from the perspective of power saving， in some cases， transformers & ldquo; A small horse pulls a small car & rdquo; Cant compare with & ldquo; Middle car & rdquo;， Even less than & ldquo; Great Lars， little dragons & rdquo;， Therefore， the loss of transformer full load and load must be considered in the calculation， and the results can be properly made in terms of power saving or power consumption. According to the correlation between the load rate and the transformer capacity: . The transformer load rate and power saving will be brought into the formula: the load index of the transformer， that is the operating load and rated capacity of the transformer . Now it is illustrated by examples that both sides of the acadc al electron touch toe ground type seek the derivative of P， and then reduce the active power loss of the large capacity transformer from the active power loss of the small capacity transformer， that is， the formula: Subtraction formula is used to calculate the detailed formula for saving transformer output power: when the transformer operation loss is small and the rate is large， the load index is the load index， and when the specific copper loss is equivalent to iron loss， the flange plate， resulting in insulation damage.
Where is goodvDry 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， phase B and phase C respectively according to the color of yellow with a compliance rate of %& ldquo; This result mostly shows the quality level of Chinas dry-type transformer industry at the present stage.
QThe input and output three-phase power lines shall be connected to phase a， green and red bus duct of transformer terminal board. The zero line shall be connected to the neutral zero line of transformer voltage， and the grounding wire， transformer casing and its transformer point shall be connected to each other. At ordinary times， the ground wire and zero wire are led out by the neutral wire of the transformer. (for example， the transformer box shall be matched with the ground wire mark of the shell and connected with each other). Check the input and output lines to ensure they are appropriate and accurate.
In order to better avoid transmission overvoltage damage， a group of overvoltage maintenance high-voltage Arresters (such as ycs active zinc oxide high-voltage arresters) shall be refitted at the working voltage bus duct side of dry-type transformer.
nVeron There is a magnetic induction line crossing in the transformer core， which will cause induced electromotive force on the plan perpendicular to the magnetic induction line. Because this electric flow creates a closed loop to generate an electric field and forms a vortex， it is called vortex. The existence of vortex makes the transformer core hot and consumes kinetic energy. This kind of loss is called vortex loss.
jRThe common dry-type transformer is an important electrical equipment， and the voltage is constantly regulated. However， because of certain necessity， the dry-type transformer will also boost voltage， and the whole process of boosting voltage is very complex， and there are many principles.
Oil 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.