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Ann stood upPr& ldquo; of wiring transformer; Enter & rdquo; And & ldquo; Output & rdquo; Use a megger to test the grounding resistance between the terminal and the ground wire. When accurately measured by 1000V megger,Ann stood up110kV transformer, the resistance value exceeds 2m ohm bus.
For no-load impulse closing of transformer, pay attention to the following matters:
Ann stood up.Under normal conditions,Ann stood upPower transformer insulating oil test, different oil-based oils cannot be mixed. Under special circumstances, if it is necessary to use new oil of different grades, the transformer shall be placed for 24h and then the oil mixing test should be carried out.
Falling foreign matters and piercing
.The method and whole process of taking oil sample of power transformer are as follows:
Before no-load impulse closing, and the rising seat and waterproof sleeve installed with vent plug shall be deflated on time.
What is the wavelength of oil immersed transformer?
The whole process of hanging the core of dry-type transformer is more critical, and there are many situations that the hanging core of dry-type transformer must pay special attention to. Therefore, the hanging core of dry-type transformer should be carried out according to the above matters so as to promote the safety of dry-type transformer!
How to make up oil for oil immersed transformer?
Different diversion methods, dry-type transformers mostly use silica gel waterproof casing, while oil transformers mostly use porcelain waterproof casing;
Product line.Dry type transformer
Oil immersed transformer
The main reason is that the welding quality of electric welding is poor,Ann stood upOil immersed transformer cooling fan, there are empty welding, open welding, needle holes, sand holes and other shortcomings in welding. The oil transformer is easy to be covered with welding powder and paint when leaving the factory, and the potential safety hazards are exposed after operation. In addition, the electromagnetic induction vibration will crack the electric welding and lead to leakage.
The representative mode of connection group of dry-type transformer is: English capital letters indicate the wiring on the primary side (or primary side), and English letters indicate the wiring on the secondary side (or secondary side). Y (or y) is star wiring, and D (or D) is triangular wiring.
install.Oil leakage of porcelain pot and laminated glass oil level gauge
After the power transformer has been used for a long time, common faults of iron core will occur. Don't worry. Contact the transformer manufacturer, and the manufacturer will assign professional technicians for inspection. The main reasons are as follows:
The oil in the machinery and equipment of the oil storage tank shall generally stand for more than 8h before sampling; it is not necessary to stand when sampling on the running power transformer.
Ann stood up.Power transformer factory
When the manufacturer of the power transformer samples from the automobile oil tank, after opening the sealing cover, use the cleaned and dried rubber stopper to the oil. At the same time, clamp the branch pipe with your thumb,
The voltage regulating tap changer is not in place or poor