After no-load test run is normal for h， it can be transferred to on-load operation， and the load shall be gradually increased from %， % and % by grade.
Therefore， lock the fault point it is necessary to find the short-circuit fault point according to the fault situation， and analyze the short-circuit fault types of relay protection dry-type transformer. At the same time， if all fields are clear， disconnect the switching power supply at the fault point， the maintenance work of employees will be carried out smoothly， and the harm will not expand to a greater extent.
SabalThe 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 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.
When the manufacturer of the power transformer samples from the automobile oil tank， use the cleaned and dried rubber stopper to the oil. At the same time， clamp the branch pipe with your thumb， and loosen your thumb to make the oil enter the pipe， which dissolve and ignite， resulting in a lot of steam bodies， greatly increasing the internal working pressure of the power transformer， causing the ignition of the casing， causing large-scale power failure， endangering all normal production，SabalScb10 dry type transformer， manufacturing and activities. There are three reasons for fire accidents in the operation of power transformers.
The bearing capacity of each load is different. Generally， dry-type transformer should operate under rated capacity， the electromagnetic induced noise oscillation may be transmitted from the townhouse to the building structure. The core of noise reduction solution must be changed to copper wire connection.
What is the wavelength of oil immersed transformer?
The transformer manufacturer said that the selection should be based on the application environment of the dry-type transformer. For the extremely extreme environment， the dry-type transformer should be poured with epoxy resin glue. Because this kind of environment does not need to heat the dry-type transformer， it can operate immediately. However， for the general application environment， the class H dry-type transformer can be used.
The conductor insulation of power transformer is the main part of internal insulation. Some conductors should pass through the middle of electromagnetic coil， or between electromagnetic coil， iron yoke clamp and automobile oil tank wall. Therefore， it is necessary to ensure that this kind of conductor has sufficient insulation compressive strength， i.e. insulation spacing.
Promise and keep promiseWhat about oil immersed transformer fire?
When leaving the factory， the production and processing are not smooth and the sealing is poor. The common fault of oil leakage will be caused after the oil transformer is sealed for a period of time.
kV and above & plusmn; No load of rated voltage; Part of the circuit breaker of the tap power switch is installed in the phenolic resin insulating paper cylinder and the insulating paper cylinder is installed on the wooden frame. The actual operation rocker is connected with the dynamic circuit breaker of the tap power switch according to the wooden insulating rod. The on load tap off power switch is insulated from the ground by the insulating paper cylinder of the power switch itself and the insulating limit.
Overload or short circuit occurs inside the power transformer. Flammable insulating raw materials are endangered by high temperature and electric isolation， which dissolve and ignite resulting in a lot of steam bodies， greatly increasing the internal working pressure of the power transformer， causing the ignition of the casing， causing large-scale power failure， endangering all normal production， manufacturing and activities. There are three reasons for fire accidents in the operation of power transformers.
The cost is reasonableThe bearing capacity of each load is different. Generally， dry-type transformer should operate under rated capacity， while oil transformer has better load working capacity.
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.
In fact， ground wire is not only a kind of grounding protection. The following describes in detail that ground wire is the general name of grounding system. Ground wire is divided into protective grounding and safety factor grounding device. Among them， safety factor grounding device can be divided into grounding protection， anti electric shock grounding device and anti electromagnetic wave radiation grounding device. Protective grounding is to use it for loop to make the facilities achieve the grounding wire specified by the function.
SabalWhen sampling from a small and medium-sized power transformer without a discharge pipe (or oil sample suspension plate)，SabalTransformer device， it can be in a power transformer such as a glass test tube when it is not in operation to extract the oil sample at the bottom，SabalSupply of power transformer， or it can be replaced by changing the oil.
Oil leakage of bolt or pipe external thread
Generally speaking the ignition emergency treatment method of oil immersed transformer is mainly to disconnect the oil immersed transformer， disconnect the switching power supply on each side， quickly invest the reserved oil immersed transformer and start the power supply system from scratch. Stop the operation of refrigeration equipment. Key oil immersed transformer ignition. When L-type oil immersed transformer and high voltage station oil immersed transformer are ignited， the generator set must be disassembled first.
