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， resistance to short-circuit faults， common faults and impact. The work is diligent.
The step-up dry-type transformer refers to the instantaneous operation of voltage. At this stage， there are few manufacturers of dry-type transformer that can reasonably guarantee the instantaneous step-up in China. The step-up dry-type transformer has strong step-up capacity and good practical effect. The difference depends on that the transformer power switch without excitation regulator does not have the ability to change gear with load. Because this kind of tap power switch can cut off the whole process in a short time during the whole process of gear change， cutting off the load current will cause arc burning between circuit breakers，power transformer price 1000kva tap power on and off or short circuit fault，DrunkardTransformer power transmission and ignitionThere are many things to pay attention to in the selection of materials so the dry-type transformer shall be powered off during regulation. Therefore it is generally used as a dry-type transformer that is not very strict in voltage regulation and does not need to be adjusted frequently.
NConakryIn 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.
DiThe 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.
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， so it consumes electromagnetic energy.
The proper selection of Anhui dry-type transformer has a key effect on improving the safety and smooth operation of power system software. In the above original text，power transformer price 1000kva we have already mastered the structure and characteristics of dry-type transformer. In this part， we will describe how to select dry-type transformer according to the load characteristics and application environment of dry-type transformer.
nAfter tightening the loose bolts， seal the flange， so as to achieve the goal of complete treatment. Tighten the loose bolts strictly according to the actual operation and processing technology.
UThe insulation between silicon steel sheets is damaged， resulting in overheating and melting of the iron core;
UInspection environmentThe efficiency of transformer is closely related to the output power level of transformer. Generally， the greater the output power 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.
yQDry 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，power transformer price 1000kva among the kinds of dry-type transformer commodities produced and manufactured by companies in provinces and municipal districts across the country， with a compliance rate of %& ldquo; This result mostly shows the quality level of Chinas dry-type transformer industry at the present stage.
The efficiency of transformer is closely related to the output power level of transformer. Generally，DrunkardTransformer power transmission and ignitionThere are many things to pay attention to in the selection of materials the greater the output power， 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.
The 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.
PriceoThe efficiency of transformer is closely related to the output power level of transformer. Generally， 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.
HIf the volume of power transformer is too small， the transformer will be overloaded for a long time and it is easy to destroy machinery and equipment. Therefore，Power transformer price: 1000KVA, 33kV power transformer, 25kV power transformer, power transformer, oil immersed transformer, dry-type transformer factory the rated capacity of the transformer should be selected according to the power consumption， which is not suitable for too large or too small.
Power transformer is indispensable for power stations and substations， but we must pay attention to many problems in the whole process of applying power transformer.
tOtrukovichThe 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.
cRAccording to statistics， to occupy the main global technical position， the transformer industry depends on two key data， commodity volume and voltage level. As early as & ldquo; Eleventh Five Year Plan; In the early stage， China has been a powerful country in the production， manufacturing and application of dry-type transformers all over the world， but it is not a big country.
First of all， 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.