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Rostov is in tIf the power transformer stops running for more than 72h (if the allowable time should be reduced when the ambient humidity is & amp; gt; 95%), it should be insulated before putting into use, and the insulation resistance from the iron core to the ground should be & amp; gt; 5mfl (note that the grounding device piece should be removed).
After the test the insulation resistance from the secondary side to the ground should be ^ 100mh, connect the data signal contact of the automobile relay with the alarm circuit, the pull-in contact with the opening circuit, and adjust the overcurrent protection value.
Trabzon Sports.Maintenance contents of power transformer
What about oil immersed transformer fire?
.& 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, the resistance value exceeds 2m ohm bus.
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.
The noise of dry-type transformer belongs to low-frequency noise. In a small area, most of it is scattered according to the building structure. This kind of low-frequency noise is scattered to the household house according to the house building, and then causes gas vibration noise,Trabzon SportsHow much is a 50 KVA box transformer, the dispersion spacing and adverse effects are very large.
What is the reason for the shutdown of power transformer?
Power saving analysis of transformer
Method and process of taking oil sample of power transformer
average method.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.
After no-load test run is normal for 24h it can be transferred to on-load operation, and the load shall be gradually increased from 25%, 50% and 75% by grade.
Dry type transformer
It will also produce many faults, effectively deal with various faults of oil immersed transformer, make full use of the performance indicators and advantages of oil immersed transformer, and continuously improve the safety factor of oil immersed transformer. Ignition is a common fault of oil immersed transformer. The key fault of oil immersed transformer is short-circuit fault, and short-circuit fault is more general.
Application process.Noise solution of dry-type transformer
Automatic system of centrifugal fan: measure the temperature data signal according to the PT100 thermistor temperature measuring resistor of the embedded parts at the hot part of the bottom pressure winding. The transformer load expands and the operating temperature increases. When the winding temperature reaches 110 ℃, the system software automatically starts the centrifugal fan for refrigeration; When the winding temperature is as low as 90 ℃, the system software will automatically terminate the centrifugal fan.
When checking the hook core, the insulation of the electromagnetic coil and the porcelain sleeve is usually accidentally damaged. After the shell of the pottery is broken, if you work again, turn on the photo flash when it's light, and it's short when it's heavy. Therefore,Trabzon SportsPower supply transformer manufacturer, please pay attention during maintenance. It is not necessary to destroy the insulation. After maintenance,Trabzon SportsPrice of dry type 800kVA transformer, experts can inspect special tools, parts, insulation, etc. and deliver them after they are determined to be complete and reliable.
Trabzon Sports.Before no-load impulse closing, the transformer shall be placed for 24h, and the rising seat and waterproof sleeve installed with vent plug shall be deflated on time.
Difference between dry-type transformer and oil immersed transformer:
Solenoid insulation deterioration