How much is the power transformer
If the power transformer stops running for more than h (if the allowable time should be reduced when the ambient humidity is & amp; gt; %)， it should be insulated before putting into use， and accurately measured with a V grounding megger. The insulation resistance from the primary side to the secondary side and the ground should be ^ mfl， the insulation resistance from the secondary side to the ground should be ^ mh， and the insulation resistance from the iron core to the ground should be & amp; gt; mfl (note that the grounding device piece should be removed).
A fierce manWhat is the cause of power transformer core failure?
When we apply oil immersed transformer， we all know that it works with the help of oil. What if the oil immersed transformer is on fire? What countermeasures should we do?
Darbus If you want to check the activated carbon fiber for the hanging cover， first take out the low-voltage waterproof sleeve and the on load transformer power switch， then lower the bell cover anchor bolt of the large cover， slowly hang the galvanized steel wire rope with sufficient lifting net weight on the commonly used earrings， wear round steel from top to bottom in the surrounding screw holes， and count the spacing and specifications for easy reinstallation. At the same time， the cable wind shall be added on all sides to ensure that the core international body will not be damaged during the whole lifting process. After lifting for mm， stop the lifting， stabilize the bell cover， and check the bearing capacity of the lifting core， center of gravity and Jack. After everything is normal， lift it again until the bell cover exceeds the relative height of the body， and rotate the crane to place the bell cover on the clean skid.
Oil leakage of bolt or pipe external thread
Oil leakage of bolt or pipe external thread
If the above provisions are not met， it is OK to operate the centrifugal fan for a period of time. Check the cleanliness of the power transformer. If too much dust is found， it must be eliminated to ensure indoor ventilation and avoid insulation penetration. In particular， such as ventilation duct， and there shall be no dirt.
Power saving analysis of transformer
Falling foreign matters and piercing
The cost is reasonableThe manufacturing process of dry-type transformer is very process， and must be technically as a certain pillar. Only in that way， the performance of dry-type transformer will be more stable. What are the common manufacturing processes and steps of dry-type transformer?
The vibration reduction of the grounding device sheet solves the problem of modifying the fixed hard connection between the copper sheet of the grounding device and the dry-type transformer. The original oscillation of the dry-type transformer will be transmitted to the metal in the concrete by the baffle and cause low-frequency noise. Therefore， it must also be changed to produce flexible connection.
Power transformers are used in all walks of life
The switching power supply lacks one phase of power;
projectDifferent diversion methods， dry-type transformers mostly use silica gel waterproof casing while oil transformers mostly use porcelain waterproof casing;
Step up process of dry-type transformer?
Equipped with a temperature controller， platinum thermistor (pt) is placed beside the embedded hole on the top of the low-voltage solenoid coil to test the winding resistance temperature rise of the transformer， stop the cooling centrifugal fan， set up common problem alarm overtemperature alarm and overtemperature tripping effect， and provide reliable overvoltage protection machinery and equipment for the dry test transformer， so as to test the safety performance of the transformer operation.
A fierce manBefore application，A fierce manMaintenance of oil immersed transformer， the sampling container shall be cleaned with vehicle gasoline， soapy water or other organic solvents (such as trisodium phosphate) except oil stains，A fierce manPower electronic control， and the water can be evenly distributed from the bottle，A fierce manBasket electric box transformer， and then cleaned with purified water for many times. The cleaned sampling container shall be dried in a ℃ drying oven. After refrigeration， the bottle cap shall be tightly closed and cannot be opened before application.
Avoid aging and damage of power transformer iron core insulation: aging of iron core insulation or damage of waterproof sleeve holding anchor bolt will cause large vortex of iron core， and long-term scalding of iron core will lead to insulation aging.
Dry type transformer manufacturer