1, regular cleaning work
If excessive dust accumulation is found, it must be removed immediately to ensure air circulation. In places with large dust accumulation, baoding dry transformer shall be cleaned at least once every six months. For dust in the air duct. Use a vacuum cleaner or compressed air to clean. If not removed in time will affect the transformer heat dissipation will also lead to transformer insulation reduction and even insulation breakdown. For example, our company 220kV weizhuang transformer station 35kV transformer station used in a power failure test. 2500 v the light table is used to measure the insulation resistance, dry type transformer core its core insulation resistance Ω reduced to 3 m, 100 m Ω reduced a lot better than last time test data, the main reason is that the transformer did not clean the dirt in air ducts, cleaning after processing core insulation resistance Ω rise to 100 m.
2. Strengthen the operation and maintenance of ventilation equipment to ensure the smooth ventilation of transformer
Ensure the ventilation equipment is normal, mainly to ensure the normal operation of the fan. Such as the load is small, and prove the transformer did not especially in hot spots (which can be used with infrared thermometer and itself since the thermostat detection), can reduce the fan running, but must ensure the normal operation of a fan, because baoding dry type transformer in the event of thermal damage, will seriously damage the internal winding, the consequence is unimaginable. I'm going to lose 1kW of heat, and I'm going to lose 4 meters cubed per minute of ventilation. Isolation barriers shall be installed around transformers without enclosures. Transformer room doors, vents should have to prevent rain and snow and birds, snakes and other small animals into the measures.
3. Strengthen temperature monitoring
Usually to strengthen the observation of the thermostat, see whether the display of the three-phase temperature balance, a certain phase of the temperature display value whether there is a sudden phenomenon. At present, the thermostat and transformer internal thermistor (temperature) between the connector is a needle plug, once the contact is bad, will lead to the thermostat misjudgment. But if you strengthen the monitoring, you will find that the temperature controller is not working normally, take measures in advance, to avoid failure. For transformers of large capacity and important places, when ordering, transformer manufacturers can be required to install an additional thermistor in each phase, to achieve the dual configuration of the thermostat, so as to avoid the occurrence of such faults.
4. Actively carry out dehumidification and dehumidification work to ensure its drying degree
In some of the more humid places (such as more rain, dark places), if the dry transformer has been shut down, check whether there is abnormal moisture. If have, want to start hot wind to undertake drying treatment to its surface, in case insulation breaks through. For oxygen pouring baoding dry transformer, this kind of surface moisture does not affect the insulation inside the winding, so it can be put into operation after treatment. Once the transformer is put into operation, the heat generated by its loss will restore the insulation resistance to normal.
5. Carefully check whether fasteners and connectors are loose to ensure the mechanical strength of baoding dry-type transformer
In the long running process of transformer, due to the external known circuit and other reasons, it is inevitable that the end force, vibration caused by the loose fasteners, connectors phenomenon. The occurrence of the above phenomenon, it is possible to produce a hot spot. To this end, in the high and low pressure end and all possible places of overheating should be set temperature wax sheet, regular observation, and combined with cleaning, preventive test, tighten the end and connector.
6. Actively carry out rust removal work to prevent core corrosion
Baoding dry transformer core is exposed to air, easy to rust. If a large area of core corrosion occurs, the transformer loss will increase, the efficiency will decrease, and even directly affect the life of the transformer. So to regularly remove rust rust, avoid core rust.
In addition, the current production of baoding dry type transformer voltage level is lower than the oil-immersed transformer, so it is necessary to strengthen the lightning arrester configuration and maintenance testing. Choose zinc oxide arrester as the best arrester. The high voltage side should be connected by cable, not directly with overhead line.
Baoding zhongyi electric material manufacturing co., ltd. is a professional transformer manufacturer in baoding transformer factory, with professional production equipment, lifting, tooling and testing equipment, established a perfect quality management system, product performance indicators have reached the standard.
The company's main products: baoding dry transformer, baoding box 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.
