The technical specification of power consumption requires that the resistance of maintenance grounding wire shall be ≤ Ω The resistor is generally more than & omega;， According to Ohm"s law， when the insulating layer is damaged， the current is only / of the total current flow， so as to play a guarantee effect. The higher the voltage， the smaller the resistance， in other words， in the case of high voltage. We can care about the power transformer plant and master a lot of professional knowledge.
Dry type transformer manufacturer
NavTwo point grounding device of iron core caused by residual welding scar;
The time difference between different steps of three-phase power switch of switching power supply shall be less than ms， the closing shall be maintained by high-voltage arrester， and the neutral line of transformer shall be reliably grounded (it shall be grounded immediately).
GuayalamineWhen the power transformer operates at full load， it needs a large reactive load. This reactive load shall be provided by the power supply and distribution system. If the transformer volume is too large， it will not only increase the initial project investment but also make the transformer operate at full load or load for a long time，NavTransformer box type transformer， expand the proportion of full load loss， reduce power factor and increase Internet loss. Such operation is neither economic development nor scientific.
Dry type transformer manufacturer
The sampling container is a colorless glass bottle with a wide mouth ground glass plug with a volume of .kg or kg. - bottles shall be collected at a time for analysis and experiment. Labels shall be attached during sampling. Pay attention to the name， source， sampling date， sampling person， weather conditions and other materials of the oil sample.
A specific part of dry-type transformer is the hanging core of dry-type transformer. The hanging core of dry-type transformer is a vital component. How to carry out the hanging core?
The appropriate power saving calculation formula should be derived from the following process: active power loss of large capacity transformer: load of large capacity transformer; PDK - short-circuit fault loss of large capacity transformer， kW. Active power loss of small capacity transformer: when a pump room is in normal operation， two pumps are started separately， and each pump is driven by kW motor， so the usual load is KW， and the capacity utilization rate introduced by the transformer manufacturer is only %
On load commissioning:
Recommendation and consultationLoose core screw
After no-load test run is normal for h， it can be transferred to on-load operation， prevention and key are & ldquo; Prevention and Manipulation & rdquo; Is dominant.
Overload or short circuit occurs inside the power transformer. Flammable insulating raw materials are endangered by high temperature and electric isolation % and % by grade.
In order to better reduce the probability of short-circuit fault of relay protection dry-type transformer， which dissolve and ignite， resulting in a lot of steam bodies， greatly increasing the internal working pressure of the power transformer， causing the ignition of the casing， causing large-scale power failure，NavOil immersed transformer bidding， endangering all normal production， manufacturing and activities. There are three reasons for fire accidents in the operation of power transformers.
Where to sell APIThe 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!
After the power transformer has been used for a long time， and the manufacturer will assign professional technicians for inspection. The main reasons are as follows:
When the full load test is carried out and everything is normal， the load can be connected.
NavDifferent diversion methods， dry-type transformers mostly use silica gel waterproof casing， while oil transformers mostly use porcelain waterproof casing;
After hours of continuous trial operation with a certain load， the main body and accessories of the transformer are all normal， and the transformer will turn to all normal operation.
Then clamp the branch pipe with your thumb， clearly put forward the glass test tube，Nav125 KVA dry type transformer， rotate and release the oil in the tube to clean the sampling tube， carry out it twice， and then draw the oil sample.