A Method to Reduce the Disturbance of Transformer to Amplifier

dry power transformers can be through the magnetic field, electromagnetic induction and the circuit to form interference amplifier is the biggest noise source in the audio machine. Therefore, to deal with its working condition and application environment, in order to effectively avoid the interference generated by the power transformer, the amplifier get excellent sound. Here I will discuss this with you.
Power transformer in addition to the amplifier power supply, but also to the amplifier and power coupled to the power grid in the interference source into the amplifier, but also the amplifier voltage and current changes reflected in the grid. In order to cut off the electrostatic field between the winding and capacitive coupling, isolation and common mode suppression of the resulting interference, to avoid the grid or circuit in the common-mode voltage coupling to the secondary or primary to the audio single phase step down transformer windings Faraday electrostatic shielding is critical. The shielding can be interlayer copper foil, can also be a complete co-shaped structure, in short, on the winding (especially for the primary winding) the more surrounded the better common mode rejection.

Distribution transformer capacity how to choose

At present, in the operation of distribution transformers, there are cases of under-load operation due to excessive capacity, and overheating or even burn-out due to overload or over-current operation. This kind of device capacity choice improperly, has affected the power system power supply reliability and the economy.
step voltage regulators capacity is selected on the basis of load statistics. Since the load is not expected to be readily available, the maximum expected load is chosen. This election results, often set the capacity is too large, the power system to bring adverse effects. If the choice of economic operation, is the use of transformer copper loss and iron loss equal conditions, derive the maximum economic load factor Amorphous Core Transformer and the transformer rated capacity and maximum load ratio. As the actual operating load is not necessarily the maximum load load statistics, and the load is random, operating efficiency is variable, and its economic operating efficiency is difficult to achieve.

The basic composition of the transformer

three phase pad mounted transformer components include the body (core, winding, insulation, lead), transformer oil, fuel tank and cooling devices, pressure regulator, protection devices (moisture, airway, gas relays, oil conservator and temperature measurement devices ) And outlet bushing.
1, core
Core is the main part of the transformer in the magnetic circuit. Usually by the high silicon content, thickness 0.35mm \ 0.3mm \ 0.27mm, coated with insulating paint by the surface of hot-rolled or cold-rolled silicon steel sheet laminated together.
Core is divided into two parts of the core column and the cross-section, the core column sets a winding; transverse magnetic circuit is used.
Core structure of the basic form of heart-and shell-type two.
2, winding
Winding is the circuit part of the Amorphous Metal Distribution Transformer, which is insulated with double-wire package or round wire wrapped around the enameled wire.

With the rapid development of China's national economy, the demand for electricity has become increasingly long, as the main equipment in the power transmission system - the transformer has also been considerable development. In order to meet and meet the market demand, many manufacturers to continuously improve the product structure, improve product performance from abroad to introduce advanced production technology and equipment, new technology in the exploration of new materials to make unremitting efforts.
The development of 13.8kv single phase transformer manufacturing process mainly combines the characteristics of new products and new structure to develop a corresponding process, and focus on new materials and new equipment development and application to continuously improve product quality and reliability, but the research and development of these new processes Need a lot of bonuses and production costs increase, and the current transformer oversupply, price competition is extremely fierce, the user in the bidding activities in the preferred conditions is the price factor, it is difficult for manufacturers to invest a lot, so the production process to Can not be developed, the quality of products do not increase, the quality does not increase, the price will not be high, there is no profit resulting in a vicious circle.
China's future development direction of the 11kv single phase transformer is still energy-saving, low noise and fire and explosion-proof, high reliability development, so some of the above talk about the process should continue to promote universal use. Another choice of high-quality low-loss magnetic materials, large-scale products can be used laser irradiation or slotted silicon steel sheet, with the axial amplitude of the compaction device winding machine, vapor drying equipment, step-type cross-cutting line and other advanced production equipment Popular use. Insulation material processing as much as possible by a unified professional manufacturers to gradually increase the emerging solid insulation materials such as injection molded parts, foreign insulation parts processing with laser cutting, China may also develop a light processing insulation pieces. In addition, the pressure on the quality should be a great effort to be studied, such as fuel tank surface treatment, the type of paint so that the tank as beautiful as possible from: industrial variable electrical appliances.

Precautions on Stripping of Power Transformer Coil

1, the 100kva distribution transformer coil stripping prohibit blowing with a fan blowing body, to prevent the impact of frigidity quenching.
2, demolition of power transformer mold can not use dirty gloves to help form removal. Because the coil temperature is higher than 100 ℃, the winding has not been completely cured successfully, dirty contact coil easily left spots, affecting the appearance of the coil and found the end of the transformer coil has a long strip of non-curing phenomenon, do not touch, do not clear .
3, the panel fastening screw due to pouring material into the hard and difficult to remove after the invasion, not hard to remove, to prevent the screw fracture.
4, be sure to clean up all the material inside the copper mouth, to avoid affecting the transformer test, misdiagnosed as coil turns deviation, DC resistance unbalanced or broken head failure.
5, remove the single phase step voltage regulators die when not pull hard pull, at the same time to check the coil surface is defective. There are parts of the defect immediately check the corresponding parts of the outer mold and be dealt with to avoid the next re-emergence of a similar situation.

Farady automatic voltage regulators

Farady has different types of step voltage regulators, common names for each type will be identified and used interchangeably along with generic names, such as automatic voltage booster and automatic voltage regulator. Please note that the descriptions, operational explanations and other commentary provided about the different types of AVRs is for informational purposes only and is intended to provide an overview of variations among a class of products generically called “automatic voltage regulators.”

Farady high voltage auto load booster

Applied in the utility’s distribution systems are generally medium-voltage mechanical high voltage auto load booster(SVR). For distribution transformers, China already has a 110kV, 220kV, 330kV and 500kV high voltage, EHV transformer production capacity. For load EHV generated, Farady high voltage auto load booster can reduce the loss of distribution through regulate the voltage to work condition, for those utility and end user who use farady high voltage auto booster already prove can increase power supply company income Three phase automatic voltage booster regulate three phase in one time, save cost and easy maintain, fast installment.