Manufacturer of standard and custom oil immersed distribution transformer

Manufacturer of standard and custom oil immersed distribution transformer. Available with single phase and three phase power supply. Various features include multi-tapped, low impedance and temperature rise, optional filters and input/output breakers, integral power and remote power distribution and oil immersed power transformer. Suitable for recording studios,commercial/residential movie theatres, server rooms, diode and SCR rectifiers, inverters, frequency converters, induction heaters, voltage transformation and other applications. Commercial, education, healthcare, testing, security, telecommunications and other industries served.

Farady oil immersed transformer 1000kVA and above, shall be installed outdoor thermometer type signal, and then the distant signal

Farady oil immersed transformer 1000kVA and above, shall be installed outdoor thermometer type signal, and then the distant signal. 800kVA and above should be installed oil-immersed transformer gas relay and pressure protection device, 800kVA transformer oil-immersed according to the following requirements, in consultation with the manufacturer, but also can be equipped with gas relay. dry type transformer price shall be specified by the manufacturer, the installation of a temperature measuring device, and more generally for the 630kVA transformer installations.

Power transformer magnetic flow refers to what

The excitation current of the polemounted transformer is only the transformer side of the power supply winding connected to the differential protection circuit, the excitation current is equivalent to the internal fault of the transformer short-circuit current. Therefore, it will inevitably affect the correct work of longitudinal differential protection. Under normal circumstances, the transformer excitation current is small, usually only the substations and transformers rated current of 3% to 6% or less, so the differential protection circuit of the imbalance current is very small. In the case of external short-circuit, the excitation current will decrease due to the voltage drop of the system. Therefore, the influence of excitation current on the differential protection is often negligible in steady state. In the special case of a sudden increase in voltage, it is possible to generate a large field current which is 6 to 8 times the rated current. This transient process of the transformer excitation current is usually referred to as inrush current

Introduction of Low - voltage Outlet Method of Dry - type Power Transformer

1, low-voltage standard closed bus: If the use of closed wiring project bus (also known as plug-in bus or bus-shaped busway), the corresponding dry-type pole mounted transformer provide standard closed bus terminal to facilitate connection with the external busbar. Enclosure (IP20) products, enclosed on the top cover of the housing provide closed bus flanges; no enclosure (IP00) products, only closed busbar terminals. 2, low-voltage side of the standard side line: when the dry-type transformers and low-voltage distribution panel placed side by side, in order to facilitate the connection between the terminals, 25kva pole mounted transformer can provide low-voltage side of the outlet, usually with GGD, GCK, MNS and other low- Transformer factory and switchgear factory to sign the interface with the minutes to confirm the detailed size with the interface to ensure the smooth installation of the scene. 3, low-voltage side of the line stand side row: and the horizontal side of the outlet similar to the elected domino screen, such as the vertical layout of low-voltage power distribution screen, the transformer can provide low-voltage side row of qualifying side.

Transformer technology, voltage ratio and efficiency

For different types of transformers have the appropriate technical requirements, can be expressed with the corresponding technical parameters. Such as the main technical parameters of pole mounted transformers are: rated power, rated voltage and voltage ratio, rated frequency, operating temperature level, temperature, voltage regulation, insulation and moisture resistance for low-frequency transformer main technical parameters are: Frequency characteristics, nonlinear distortion, magnetic shielding, electrostatic shielding, efficiency and so on. Transformer voltage than the two sets of transformer coils were N1 and N2, N1 for the primary, N2 secondary. In the primary coil with an AC voltage, in the secondary coil will have induced electromotive force at both ends.When N2> N1, the induced electromotive force than the primary plus the voltage is higher, this kind of transformer called the step-up transformer: When N2 is the voltage ratio (turns ratio), when n <1, then N1> N2, U1> U2, the transformer step-down transformer.

substations and transformers business in the future development of technological progress will take the road. The traditional old products despite the market, there is production, but the profit margins have been very small, it is impossible to form a strong competitive edge, the transformer main profit point is a new generation of high-end products, passive integration technology, the rapid rise of micro- Machine products, a comprehensive upgrade for the transformer to provide a leap-forward development of the technology entry point. In recent years, the development of 10kva transformer frontier, such as power ferrite materials, soft magnetic alloy materials, amorphous crystalline magnetic materials, nano-alloy magnetic materials, piezoelectric ceramics, nano-insulating materials have achieved fruitful development, which for the electronic transformer The industry technological progress has created good conditions, the electronic transformer will miniaturization with the needs of the whole, to the high-frequency, low loss, chip-oriented direction.

How to Determine the Reasonable Capacity of Transformer

First of all to investigate the local power supply voltage, the user's actual electricity load and the conditions of the place, and then refer to the transformer nameplate marked technical data selected one by one, generally from the transformer capacity, voltage, current and environmental conditions into account, Should be based on the user's electrical equipment capacity, nature and use of time to determine the required load, in order to select the transformer capacity.
In normal operation, the oil type transformer should bear the load of the transformer rated capacity of about 75 to 90%. If the actual load of transformer is less than 50%, it should be replaced with small capacity transformer. If it is larger than the rated capacity of transformer, the transformer should be replaced immediately.
At the same time, the transformer in the choice of the power supply line to determine the polemounted transformer primary coil voltage, according to the secondary device voltage selection of electrical equipment, the best choice for low-voltage three-phase four-wire power supply system. This provides power for both electricity and lighting.
For the choice of current load should pay attention to the motor starting to meet the requirements of the motor (because the motor starting current sink operation than the large 4 to 7 times).

Transformer routine maintenance knowledge is as follows:

In recent years, with the power grid capacity, voltage level, and the advancement of power reform, power supply sector not only to ensure the reliability of power supply, but also to ensure the quality of power supply. three phase pad mounted transformer as an indispensable important power system equipment, its normal work or not directly affect the safe and stable operation of the power grid. Therefore, to ensure the reliable operation of the transformer has important practical significance. China's large transformer over 220 kV in recent years, the occurrence of multiple insulation incidents, mostly with its partial discharge. Therefore, the partial discharge of effective inspection can effectively determine the operating state of the Amorphous Core Transformers.

Drying Method of Transformer

Induction heating method
This oil immersed distribution transformer is the body on the tank, the outer winding coil through the power frequency current, the use of fuel tank wall eddy current loss of heat to dry. At this time the temperature of the wall should not exceed 115 ~ 120 ℃, body temperature should not exceed 90 ~ 95 ℃. In order to facilitate the winding coil, as much as possible so that the coil turns less or less current, the general election of 150A current, the conductor can be useful 35 ~ 50mm2 wire. The tank wall can be pad asbestos multi-root, wire around the asbestos.
Hot air drying method
This method is the body in the drying room through the hot air drying. Imported hot air temperature should be gradually increased, the maximum temperature should not exceed 95 ℃, in the hot air inlet should be equipped with filters to prevent the entry of Mars and dust. Do not blow the hot air directly to the body, as far as possible from the body below evenly blowing in all directions, so that moisture from the lid vent holes released.