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.

Protection of dry - type transformers

According to the use of environmental characteristics and protection requirements, 3 phase step up transformer can choose a different shell. Usually IP20 protective shell, to prevent the solid foreign body greater than 12mm in diameter and rats, snakes, cats, birds and other small animals to enter, resulting in a short-circuit power failure and other malignant failure, to provide security for the live part of the barrier. If you need to install the transformer in the outdoors, you can choose IP23 protective shell, in addition to the IP20 protection, but also to prevent the vertical line into a 60 ° angle within the water droplets into. But the IP23 shell will reduce the cooling capacity of the transformer, the choice should pay attention to its operating capacity to reduce.

A thorough analysis of the cause of spontaneous combustion of power

First, the prefabricated compact transformer high and low voltage on both sides without insurance. Although some have been fitted with drop-out fuse and claw insurance, but its fuse is used more aluminum or copper wire instead, resulting in low-voltage short-circuit or overload, the fuse can not fuse and burn the transformer. Distribution transformer high and low fuse configuration properly. Transformer fuses on the widespread configuration of the phenomenon is too large, resulting in a serious overload distribution transformer when the transformer burned.
Second, the rural lighting lines are more, most of them are using single-phase power supply, coupled with the construction of the jumpers in the random and management is not in place, resulting in a partial load shifting phase of operation. Long-term use, resulting in a phase coil insulation burned the aging transformer.
Third, the tap.
1, privately adjust the tap. As the winter and summer load differences in electricity consumption, the voltage level of change. Thus some rural and corporate electrician without electric repair department to adjust the trial and adjust the tap changer privately, resulting in distribution transformer tap-changer is not in place, bad contact and burned.
2, the tap switch poor quality, irrational structure, the pressure is not enough, contact is not reliable, the external character wheel position and the actual position is not exactly the same, causing the star moving contact position is not fully contact, dislocation of the dynamic and static contact The insulation distance between the two taps becomes small and short-circuit or ground discharge occurs under the action of the potential between the two taps. The short-circuit current will soon burn the taps and even damage the whole winding.
Fourth, oil leakage is the transformer most common appearance anomalies. As the transformer body filled with oil, the connection parts are rubber beads, pads to prevent oil leakage. After a long period of operation, will make some of the rubber beads in the transformer, rubber pad aging caused by oil seepage cracks, resulting in decreased performance after damp insulation, discharge short circuit, burn the transformer.
Fifth, the single phase pole mounted transformers high and low voltage lines are mostly introduced by the overhead lines, lightning arrester is not put into operation in time or without the installation of 10kV surge arresters, resulting in lightning destroyed the transformer.
6, some of the distribution transformer is not configured a protection, or is configured with a protection, but its action, reliability is very low, and some can not even action.

Farady oil immersed power transformer is certified

The oil immersed power transformer is certified IEC and every transformer is endowed with a certification of PCB and PCT-free oil.The use of the latest manufacturing technologies such as step-lap cores and oval technology guarantees the maximization of the power/losses rate, and all this at a budget price. All our standard distribution transformers sold in the world are compliant with the new standard on no load and load losses, and tested applying a 0% tolerance to ensure very low energetic and economic losses.

Farady produce distribution transformers

Farady distribution transformers are available in full ranges of 50- 35kv. We chose to design and produce distribution transformers with high quality standard features, not only complying with Norms, but also enhancing the durability and the efficiency of the transformer. The standard C3 painting cycle applied on all oil immersed distribution transformers guarantees a + 33% of protection more than the average transformer on the market.

Farady 13.8kv single phase transformer

The kind of special pole mounted distribution transformer is can be directly step down the high voltage from 35kV to low voltage 240V ~440V. Its usefull for small load demand village or region using. No need middle transform by another high voltage, thus save the cost of the electrical investment. Farady 13.8kv single phase transformer have most competitive price will go through lots of tests carefully before dispatch: Raw material check, Winding test, Assemble test, Painting check, Nameplate check and routine tests.