Electric power industry to develop very quickly now, all kinds of dry type transformer manufacturer is becoming more and more widely used, because dry variable has a safe, flame retardant, easy to maintenance etc., so a large number of dry change often appear in the commercial housing construction, easy generation problem is the noise, the noise problem is also the intrinsic characteristics of transformer running, here small make up the detailed analysis of the dry type transformer manufacturer do change encountered many kinds of noise and how to solve the problem.

Problem a:

High voltage will make the transformer overexcitation, noise increase and sharp, directly affect the noise of the transformer.

Solution: the 10kV voltage in the city is generally too high. According to the output voltage of the low-voltage side, the tap gear should be put into the appropriate gear. On the premise of guaranteeing the quality of low-voltage power supply, the high voltage tap is connected to the up-regulated (low-voltage output voltage is reduced) as far as possible, so as to eliminate the over-excitation phenomenon of the transformer and reduce the noise of the transformer.

Problem two:

The resonance of the fan, shell and other components will produce noise, which will be mistaken for the noise of the transformer.

Solutions:

1) to see whether the shell aluminum plate (or steel plate) is loose, it is possible to step on the deformation during installation. It is necessary to tighten the screws of the shell to fix the shell aluminum plate well, and correct the deformation part.

2) to see if the fan is loose, tighten the fastening bolt of the fan and pad a small piece of rubber between the fan and the fan support to solve the vibration problem of the fan.

3) if the transformer parts are loose, they need to be fixed.

Question 3:

Bad installation will aggravate the vibration of transformer and amplify the noise of transformer.

Solutions:

1) the original installation mode shall be modified by the installation unit.

2) add shock-proof rubber mat below the transformer car to solve some noise.

Problem four:

The operating environment affects the noise of transformer, and the unfavorable environment increases the noise of transformer by 3dB ~ 7dB.

Solution: indoor can add appropriately a few sound-absorbing materials.

Question 5:

Because of the large current passing through the side-by-side bus, the bus vibrates due to the leakage of magnetic field. The vibration of bus bridge will seriously affect the noise of transformer, which will increase the noise of transformer by more than 15dB, which is difficult to judge. General users and installation units may mistake the noise of transformer for that of transformer.

Solutions:

1) mainly to destroy the condition of bus bridge resonance, tighten or loosen the hanger screw.

2) open the bus bridge cover plate and fix the bus properly.

3) soft connection is adopted for low-voltage outlet.

4) please ask the manufacturer of bus bridge to solve the problem.

Question 6:

There is electromagnetic attraction caused by magnetic flux leakage between the joints and laminates of silicon steel sheet.

Solutions:

1) tighten the screws on the transformer, including the screws at both ends of the clamp, the screws through the core, and the nail wire of the pad.

2) add shock-proof rubber mat under the transformer car to solve some noise.

Question 7:

When there is load current in the winding, the vibration of the winding is caused by the magnetic flux leakage generated by the load current.

Solutions:

1) tighten the oncomelania wire of the pad to increase the axial compression force of the coil.

2) loosen all the onkle wire of the pad, loosen all the bolts on the copper row of the outlet line and the copper row of the null line, sway the low-voltage coil, shift the high-voltage coil by 3 ~ 5 mm, and then tighten all the bolts.

Question 8:

Distorts the voltage waveform of the transformer (e.g., resonance), generating noise.

Problem solving: users can consider adding devices to reduce harmonics.

Question 9:

The transformer cannot be excited normally, which makes noise.

Solutions:

1) transformer power failure, check whether the power supply is short of one phase;

2) check whether the transformer high-voltage fuse is blown out of phase;

Question 10:

It is because of the bad contact inside high pressure ark, cause. Second, the knife and brake is not in place.

Solutions:

1) check the contact and fuse of the high voltage cabinet and the whole high voltage circuit.

2) please check the high pressure cabinet manufacturer.

Question 11:

The parts and components of the transformer, such as clamping channel steel, pressing bolt and pulling plate, are sprayed with blue paint, and the contact of each part is not very good. Under the action of magnetic leakage field, the suspended potential discharge between each part produces a sound.

Solutions:

1) this discharge will not affect the normal operation of the transformer.

2) during power failure maintenance, the paint can be scraped off the parts that are not in good contact, so that all parts of the transformer are in good contact.

Question 12:

When the low voltage line grounding or short circuit accident occurs, the transformer will give out the rumbling sound; The closer the short circuit point is to the transformer, the more obvious the sound is. If the short circuit point is near the transformer, the transformer will make a loud and obvious sound.

Question 13:

The transformer that thinks different manufacturer commonly, different model transformer, different use environment, installation is improper the noise that can make transformer is different.

Question 14:

Some users have used oil transformer before, so they have a deep understanding of oil transformer. When they first touch the dry transformer, they think the noise of dry transformer and oil transformer should be the same.

Solution: in fact, the oil changes the noise is also very big, but the inside is filled with oil, outside in a layer of sealed iron shell, sound transmission. When the dried iron core is exposed, a sound will come out. Noise is the inherent characteristic of transformer, the noise level will not affect the quality of transformer.

Main products: baoding dry type transformer, baoding box type transformer, baoding oil immersed transformer, baoding high and low voltage complete sets of equipment. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.