The maintenance of baoding dry transformer is to ensure its normal and safe operation after maintenance. The power is safe and stable, the baoding dry type transformer which is in operation or out of operation is maintained once a year, and it will be checked and maintained before operation. Before baoding dry type transformer maintenance on the standby dry type transformer, disconnect the overhaul of baoding dry type transformer low voltage side circuit breaker, remove the holding power of manipulating insurance, baoding disconnect when dry type transformer maintenance overhaul of dry type transformer high voltage side circuit breakers, close the grounding switch, the baoding held enough after discharge, dry type transformer locks in high voltage, the switch handles hanging "stop closing tag" brand, the maintenance of the dry type transformer, first carefully cleaning the porcelain bushing and the shell, and then check whether there is any break on shell, gasket, discharge print or rubber gasket for aging, cable and bus without deformation phenomenon, change the update in time, Check whether the contact surface of the bus line is clean. The contact surface should be removed and coated with electric compound grease.
During the maintenance of dry type transformer in baoding, check whether the grounding of dry type transformer is good, whether the ground wire is corrupt, and if it is seriously corrupt, replace it; Tighten the lead wire terminal, pin, ground screw, wire bus screw; When maintaining, make sure to clean the dust around the dry type transformer and the fittings, and check whether the fire control facilities and ventilation system are good. There is no problem with the cooling fan, there is no problem with the temperature controller, disconnect the earthing switch on the high pressure side, and lock the high pressure open joint bar, and measure the insulation resistance with the 2500V table. Value measurement with baoding dry type transformer factory, insulation resistance should not be less than 70% of the raw data when delivery from factory, if not up to standard shall report immediately disposal, close high side grounding switch again, let the baoding discharge dry type transformer, check the transformer room and dry type transformer for legacy tools, evacuate the scene, the electrician staff do a good job in baoding dry type transformer maintenance commissioning records in detail.
Matters needing attention for dry transformer maintenance
1. Prevent overload operation of baoding dry transformer: if the transformer is overloaded for a long time, the coil will be heated and the insulation will gradually age. When baoding dry type transformer runs, its coil and iron core produce copper loss and iron loss, these losses change into heat energy, making the iron core and coil temperature of dry type transformer rise. If the temperature exceeds the allowable value for a long time, the insulation will gradually lose its mechanical elasticity and cause the insulation to age.
Check the ventilator and refill it regularly if you are short of oil. Monitoring the upper oil temperature in operation of baoding dry transformer cannot guarantee the safe operation of the dry transformer. The difference between the temperature of the dry-type transformer and that of the surrounding air is known as the temperature rise of the dry-type transformer
3. When the reasonable capacity is in normal operation, the electric load of baoding dry type transformer should be about 75-90% of the rated capacity of dry type transformer.
Overloads are divided into normal overloads and accident overloads. Normal overloading is caused by the increase of user power consumption under normal power supply. It will raise the temperature of baoding dry-type transformer, cause the insulation of dry-type transformer to accelerate the aging, the service life is reduced, so the over-load operation is not allowed under normal circumstances. Under special circumstances, the baoding dry type transformer can be overloaded for a short period of time, but it shall not exceed 30% of rated load in winter and 15% of rated load in summer. In addition, the overloading capacity of dry type transformer should be determined according to the temperature rise of baoding dry type transformer and the manufacturer's regulations. In case of power system or user substation accident, in order to ensure continuous power supply for important equipment, baoding dry type transformer is allowed to run under overloading for a short time, that is, the fault overloading will cause the coil temperature to exceed the allowable value when the fault overloading occurs, so the insulation will age faster than normal conditions. However, there is little chance of overloading. Under normal circumstances, baoding dry type transformer is under load, so short-term overloading results in damage of insulation of dry type transformer. The time and times of overloading shall be executed according to the manufacturer's regulations.
Baoding zhongyi electric material manufacturing co., LTD is a professional manufacturer of transformer for baoding transformer factory. It has professional production equipment, hoisting, tooling and testing equipment, and has established a perfect quality management system.
Main products of the company: baoding dry type transformer, baoding box type transformer, baoding oil immersed transformer, baoding high and low voltage complete sets of equipment. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.
