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PatanOld box tDifference between dry-type transformer and oil immersed transformer:
Oil immersed transformer
Bucharest.Two point grounding device of iron core caused by residual welding scar;
The tap changer of power transformer shall also have strong insulation. 10kV off load tap changer is generally insulated from the ground by the produced insulating paper pipe factory.
.When the full load test is carried out and everything is normal, the load can be connected.
The vibration reduction solution of cable bridge is to modify the hard connection between bus bridge and dry-type transformer, and the vibration reduction solution is made at the cable bridge.
Before no-load impact closing, the pose period of overcurrent protection shall be set to zero,BucharestMaintenance standard of dry type transformer, and the data signal circuit of steam vehicle relay shall be temporarily connected to the pull-in circuit.
Oil leakage at looper flange
The efficiency of transformer is closely related to the output power level of transformer. Generally, the greater the output power, the smaller the loss to output power ratio and the higher the efficiency. On the contrary, the smaller the output power the lower the efficiency.
Before and after sampling, clean the periphery of the sampling port with clean or hairless linen.
Safety production.Power transformer plant
Different diversion methods, dry-type transformers mostly use silica gel waterproof casing,BucharestPartial discharge standard for dry type transformer, while oil transformers mostly use porcelain waterproof casing;
Falling foreign matters and piercing
The noise of dry-type transformer is mainly the vibration noise in operation. This vibration noise is caused by multiple positions, including the vibration of magnetic induction electromagnetic coil. All pay great attention to the solution of vibration when carrying out noise control.
Highly recommended.Operation and maintenance management of oil immersed transformer
The selection shall be carried out according to the load characteristics of power. There are many types of power loads. Different dry-type transformers shall be used for different power loads. If the standard impulse level of power load is less than 150kV,BucharestOutline dimensions of oil immersed transformer, class H dry-type transformers shall be used. If the standard impulse level of power load exceeds 150kV, epoxy resin adhesive shall be used to pour dry-type transformers.
Analysis of common faults of oil immersed transformer:
Bucharest.The voltage regulating tap changer is not in place or poor
Caused by sand holes and cracks. For crack leakage drilling stop hole is a good way to remove in-situ stress and prevent widening.
The dry-type transformer is composed of two winding resistances, resulting in four wiring groups: & ldquo; y, & ldquo; D, Y & rdquo;, & ldquo; y, D & rdquo; and & ldquo; D, D & rdquo;. In China, only & ldquo; y, Y & rdquo; and & ldquo; y, it will not be upgraded. All marks show that with neutral line, it will not be upgraded The letter N after the English letter Y indicates that the neutral line has transformer grounding wire. Yn0 wiring group, when UAB and UAB overlap, the minute hand points to 12. & ldquo; 12 & rdquo; in the new wiring group, it is indicated by & ldquo; 0 & rdquo.