Power transformer is an idealized supporting facility transformer for medium cabinet and high-voltage cabinet at the present stage， and can be equipped with safety protective casing according to different waterproof grades. It is applicable to key or unique natural environment sites such as multi-storey buildings， commerce， airports， tunnel construction， chemical enterprises and factories.
If the power transformer stops running for more than h (if the allowable time should be reduced when the ambient humidity is & amp; gt; %)， it should be insulated before putting into use， and accurately measured with a V grounding megger. The insulation resistance from the primary side to the secondary side and the ground should be ^ mfl， the insulation resistance from the secondary side to the ground should be ^ mh， and the insulation resistance from the iron core to the ground should be & amp; gt; mfl (note that the grounding device piece should be removed).
Geneida DistrictThe iron loss of transformer includes two levels. The first is the hysteresis loss introduced by the transformer manufacturer. When the AC circuit is based on the transformer， according to the magnetic induction line of the transformer ferrite core， its orientation and size change with the change， which promotes the internal molecular structure of the ferrite core to interact with each other， releases energy， which is the hysteresis loss. The other is the vortex loss when the transformer is working.
If the power transformer stops running for more than h (if the allowable time should be reduced when the ambient humidity is & amp; gt; %)， it should be insulated before putting into use， and accurately measured with a V grounding megger. The insulation resistance from the primary side to the secondary side and the ground should be ^ mfl， the insulation resistance from the secondary side to the ground should be ^ mh and the insulation resistance from the iron core to the ground should be & amp; gt; mfl (note that the grounding device piece should be removed).
ZeitolInsulation and heat removal are different. Dry type transformers are generally insulated with epoxy resin， insulated by insulating oil in the circulating system inside the transformer cooled by natural air and large capacity by centrifugal fan. Oil immersed transformers are insulated by insulating oil， and heat is discharged on the radiator (radiator) of the circulating system inside the transformer.
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.
The scientific research of power transformer oil is generally carried out according to the way of sampling. What are the common sampling methods and processes?
Due to poor sealing， generally，Geneida DistrictDry type transformer 10 / 0.4kV， the sealing of box edge and machine cover is sealed with acid-base resistant rubber rod or rubber plate. If the joint is not solved well， it will lead to common faults of oil leakage.
If 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.
The long-term overload of power transformer will slowly cause the scalding and insulation aging of solenoid coil， resulting in short circuit between coils， two-color short circuit or short circuit on the ground， resulting in the ignition of power transformer. Therefore， the insulation compressive strength of power transformer shall be tested before installation and operation， and overload is not allowed in the whole process of operation.
Home page recommendationWiring mode of dry-type transformer:
Dry type transformer manufacturer
The project cost is different. Compared with the purchase price of capacity transformer， there must be a strong line breaking component， so that sliding flash charge and discharge may occur at a lower current. In order to better solve this disadvantage， the appearance of the insulating parts between the winding and the iron yoke should be the same as that of the medium horizontal plane of the winding to the iron yoke insulation as far as possible， so as to reduce the electric field component intersecting with the insulating parts.
Direct materialThe first step of the whole wave process calculation is to calculate the basic parameters of the Internet such as inductance， capacitance and resistor. The accuracy of those basic parameters does great harm to the calculation results of the whole wave process. For the inductance calculation， the good model is the solid model of infinite transformer core column， but there are many calculation methods.
Transformer manufacturer
Some are tied with plastic tape，Geneida DistrictQuotation for 2500kVA dry type transformer， and some immediately press the two edges together， and there is still oil leakage without sealing effect.
Geneida DistrictDry type transformer manufacturer
Caused by sand holes and cracks. For crack leakage， drilling stop hole is a good way to remove in-situ stress and prevent widening.
Dry type transformer company