How much is the power transformer
Avoid the load operation of power transformer: if the load operation is long-term， it will lead to the scalding of solenoid coil， slow aging of insulation， short circuit fault between boxes， two-color short circuit fault or short circuit to ground fault and dissolution of oil.
BandariaThis is the example of power consumption engineering as power saving. The key reason is that the habitual calculation method ignores the copper loss.
What is the important role of power transformer
MayadinThe noise of dry-type transformer comes from
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.
Under normal conditions， the actual operation of the oil immersed transformer shall be undertaken by the on-site operation and maintenance management staff. Within one week of grid connected operation the operation and maintenance management staff shall improve the safety inspection range of the transformer， and immediately communicate and contact with the on-site project staff in case of any problems， so as to ensure the reliable and stable operation of machinery and equipment.
() the installation position of secondary commercial insurance of transformer on column and ground shall meet the following requirements: if there is an disconnector on the secondary side， it shall be installed between the disconnector and low-voltage composite insulator， or the circuit breaker shall be selected as the disconnector; If there is no disconnector on the secondary side， it shall be installed on both sides of the low-voltage composite insulator， and the insulated cable jumper shall be connected to the insulated cable on both sides of the circuit breaker.
The domestic transformer market is slow
The cross-sectional wiring of transformer input and output power plugs shall comply with the provisions of their current size; It should be equipped according to the current intensity of -A / Min.
Packaging strategyThe project cost is different. Compared with the purchase price of capacity transformer， the purchase price of dry-type transformer is much higher than that of oil immersed transformer.
Solenoid insulation deterioration
Due to poor sealing，BandariaParameter table of oil immersed transformer，Bandaria800 oil immersed transformer， generally， the sealing of box edge and machine cover is sealed with acid-base resistant rubber rod or rubber plate. If the joint is not solved well， it will lead to common faults of oil leakage.
If the above provisions are not met， the problem of dryness shall be solved. Generally， 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，BandariaDifference between rectifier transformer and power transformer， pay attention to cleaning the insulators of the power transformer and the top and bottom ends of winding resistance installation. Portable centrifugal fan or dry air compression or N shall be used to clean the dust in indoor space that is not easy to reach， such as ventilation duct， porcelain， laminated glass and other materials very well so as to achieve the pressure management of oil leakage.
The cycle time of power-off cleaning and inspection shall be determined according to the surrounding environment and load conditions， generally from half a year to once a year;
On load commissioning:
BandariaFor the leakage that has already occurred， find the leakage point first， which can not be ignored. For the position with serious leakage， shovel or sharp punch can be selected. The leakage point can be riveted with special tools for metal materials. After manipulating the leakage， the treatment surface shall be cleaned and tidy. Polymer composite materials are mostly selected for dry consolidation. After dry consolidation， the goal of long-term treatment of leakage can be achieved.
The insulation distance between the winding and the iron yoke of power transformer is much larger than that between the windings， because the electric field between the winding and the iron yoke is far away and not as symmetrical as that between the windings. In the electric field in the middle of the winding， most of the cables are in phase with the insulating cylinder (plate) in the middle of the winding， that is， the disconnection component of the electric field is small.
The electromagnetic coil is wound with copper power wire or foil and lifted with glass fiber. The epoxy adhesive does not need filling. The vacuum drying equipment is used for degassing and dehumidification. The overall concrete is poured with high fracture toughness， resistance to short-circuit faults， common faults and impact. The work is diligent.