1. Winding electricity heating method

Heating methods are more, such as hot oil circulation, hot air circulation, eddy current heating, kerosene vapor, etc., can be selected according to local conditions, with its director. However, when these methods are used to process the voltage transformer, it appears that the equipment is bulky and complicated, the power capacity is large, and the power consumption is more and more. The site preparation work requires a long time and the construction is difficult.

The voltage transformer short-circuit their own high-voltage winding, low-voltage winding lights (12V) through the current heating. JCC-110-type voltage transformer winding arrangement: the outer auxiliary winding (aD, xD), the innermost high voltage winding, the middle is the low voltage winding (a, x), and the low voltage winding is in the lower most susceptible to moisture s position. Therefore, heating from the low-voltage winding is better than heating from the auxiliary winding so that the internal moisture can evaporate better.

The heating current starts at 30A, and then the temperature is converted as the low-voltage winding resistance changes the current size at any time. When the winding temperature exceeds 80 ℃, the winding temperature to be controlled at 80 - 90 ℃, the temperature level can be determined by the degree of moisture. Special attention should be given, do not heat up too fast, the current value of the increase or decrease is small, or the temperature will increase rapidly. It is best to test the temperature every 15 minutes.

2. Vacuum degassing heat treatment

110kV voltage transformer vacuum degassing heat treatment, the drying time is shorter. This drying process than in the oven treatment has the following advantages:

1) The processing equipment is simple and requires only 1 vacuum pump (1.1kW), 1 voltage regulator (0.5kV) and 1 line transformer (300V · A, 12 / 220V).

2) On-site processing, hoisting and transportation can save costs. As not lifting, but also to avoid the temporary electrical equipment near the blackout.

3) The winding itself energized and dry, windings heated evenly, good drying effect.

4) This drying method, suitable for all types of voltage transformers and current transformer drying.

3. Judgment of dry conditions

The voltage transformer drying process and the results of the judge, mainly to measure the dielectric loss angle and insulation resistance. Before the test should be wiring small casing and the wiring board clean, so as not to affect the measurement results.

Pulverizer Machine

Pulverizers are machines that pulverize large solid materials to the required size.

According to the size of the crushed material or the crushed material, the mill can be divided into coarse crusher, medium crusher, fine mill and superfine mill. There are four kinds of external forces applied to the solid in the grinding process: pressing, cutting, impact and grinding. Press rolling is mainly used in coarse and medium crushing, suitable for the crushing of hard materials and bulk materials. Shearing is mainly used in fine crushing, suitable for the crushing of ductile materials. Impact is mainly used in medium crushing, fine grinding, ultrafine grinding, suitable for crushing brittle materials. Grinding mainly in fine grinding, ultrafine grinding, suitable for small pieces and fine particles.

The crusher makes use of the high speed relative motion of the movable tooth plate and the fixed tooth plate, so that the crushed object can be crushed by the comprehensive action of tooth impact, friction and the impact between the materials. The crusher is suitable for crushing Chinese herbs, precious medicinal materials, ores and chemical raw materials in small batches in various varieties, alloys, metallurgy, geology, scientific research and other units.

The pulverizer machine has the advantages of simple structure, solid, stable operation and good crushing effect. The pulverized material can be discharged directly from the grinding chamber of the main machine. The particle size can be obtained by replacing the mesh screen with different aperture. The powder collecting chamber adopts the completely closed silencer structure, which can effectively reduce the working noise. In addition the machine is all stainless steel. The inner wall of the casing is machined to achieve smooth surface, which changes the phenomenon of rough inner wall and powder accumulation of the previous models, so that the production of drugs, food, chemical industry and so on is more in line with national standards and meet the requirements of GMP.

Pulverizer Machine,Crushing Machine,Milling Machine,Grinding Mill, Grinding Machine

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