Dry type 315 transformer price reasonable choice Liwang Elec

 

 

 

The main insulation of dry-type transformers is usually made up of the same insulation structure parts as oil-immersed transformers: insulating paper tube, Angle ring, component separator, etc. In the design of dry transformer insulation, in addition to ensuring the insulation strength, special attention should be paid to the coil between the sufficient air cooling duct. And care should be taken to place the insulation parts so that the air can reach the coil most freely. If conditions permit and the operation mode allows, the graded insulated transformer must be earthed at the neutral point; If the neutral point of the graded insulation transformer does not operate on the ground, the neutral over-voltage protection must be put into operation reliably. Transformer is the extent of the damage more, and the damage of transformer is more, this or that problem is more, the transformer is damaged or failed, should be handled in time, prevent all kinds of failure and damage, affect running, bring the huge economic loss and personnel. After the transformer damage and failure, it is necessary to analyze the reason. Damaged by lightning, especially in tap switches, bushing and transformer coils. Easy to damage. Transformer outlet short circuit, short circuit current caused huge electrical power, so that the coil deformation and damage. Long-term overload operation will cause rapid aging of transformer insulation and thermal stability damage. Long-term overvoltage operation.

 

In recent years, with the development of urban construction, power transformers installed in buildings, low railways, airports and other places with high fire requirements are required to use oil-free equipment. In order to meet the requirements of fire, oil-free transformer - dry transformer came into being. Early dry transformer working part, such as winding, iron core are in the air, to solve the transformer winding fiber insulation material due to moisture absorption and reduce the insulation level, the transformer winding whole in phenolic varnish soaked and dried. To further improve the insulation level of transformer and solve the problem of heat dissipation in transformer operation. We will ensure the orderly implementation of summer peak this year. In addition, transformer guardrail is constructed in sections with large quantity and safety prevention problems to ensure the safety elimination of hidden dangers. This ensures safe, reliable and orderly supply of electricity and ensures the normal use of electricity by power users. In more areas, we also see that the oil-immersed transformer installed in the area will have an oil-immersed transformer guardrail around it, and some will build a small wall to enclose it, so that the residents will not touch it at all, which also ensures the personal safety of the residents. The construction and use of oil-immersed transformer should be far away from people's residence, so as to realize the complete isolation of oil-immersed transformer, prevent oil-immersed transformer from being brought to people, so as to greatly improve the safety of oil-immersed transformer! Oil-immersed transformers work with transformer oil, it is relatively high requirements for transformer oil, for oil-immersed transformers due to the frequent use of transformer oil, in the summer or dry weather conditions.

 

The winding form of transformer winding needs to increase the distance between layers and turns of the winding as the wind channel. When necessary, the transformer is also equipped with a blower, convection air cooling heat dissipation. However, it is also required that the transformer installation site be in good condition when used. If ventilation is required, the relative humidity of the air should not exceed 70%, the ambient temperature should not exceed 40℃, etc. Early dry type transformers brought great inconvenience to operation and limited the development of high voltage and large capacity transformers. And to ensure that the oil pillow sealing, so as not to water into the transformer and reduce the pressure of the oil level, and transformer insulation affected by moisture, resulting in insulation breakdown and short circuit. The floor of the transformer has two kinds of elevating and not elevating. If the floor is not raised, the transformer shall be placed on the concrete floor, and the indoor floor shall be appropriately higher than the outdoor floor. When the ground floor is picked up, the elevations are generally 0.8m, 1.0m and 1.2m. After the ground floor is raised, the transformer is put on the raised ground, and the air can enter below. The height of the transformer room should also be increased accordingly. The minimum safe distance between transformer and indoor is shown in Figure 3. Where the size without parenthesis applies to 320kV? For transformers below A, the size in brackets is applicable to 320 ~ 1000kvV? A's transformer. When the capacity exceeds 10000V "A and the corresponding distance is not less than 1m and 1.5m transformer, each S13 oil-immersed transformer shall be installed in A separate transformer room for all two transformers. Liwang Electric Company