Dry type transformer is to change the voltage together, do not change the power, in the voltage change must make the current change, that is to change the impedance. Therefore, in electronic technology, transformers are used for impedance matching. The shell of mine dry-type transformer is full corrugated, with two ends open cover and top open cover structure, with high mechanical strength, low temperature rise, good heat dissipation and other advantages. The iron core is made of high-quality low loss silicon steel sheet with low no-load loss, low no-load current and low noise. Class H insulation material and advanced insulation structure are selected, which have good thermal stability and can continue to operate at full load under high temperature.
This kind of dry-type transformer has strong structure and short shape, and there is no place to store oil on the upper part of transformer. There is proper space on the oil surface in the oil tank to prevent excessive pressure in the oil tank when the vent on the tank cover is blocked. The mechanical strength of the tank can accept a pressure of 0.1 MPa without permanent deformation. The high and low voltage incoming and outgoing lines of mine transformer are all cable junction boxes filled with insulating glue.
operation detection and protection of dry type transformer for mining
1. Check the bushing for cracks, discharge and dirt.
2. Check whether there is oil leakage and oil leakage.
3. Check whether the oil level, oil color and oil temperature are lower than 55 ℃.
4. Check whether the sound, grounding, current and voltage are normal.
when checking the dry-type transformer, we must pay attention to the above detection and protection items and items, so as to better improve the service life and application of dry-type transformer.
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