Transformers And Rectifiers

Rectifier transformer

Transformer working for medium frequency induction furnace, electric arc furnace, continuous casting machine, rolling mill steel plant.

The S9, S10, S11 series of 20kV and 35kV three-phase oil-immersed rectifier transformers produced by our company meet the requirements of CE, UL, CSA, ROUSH, GB1094 "Power Transformer" and GB / T6451-2008 "Three-Phase Oil Immersed Power Transformer technical parameters and requirements "standard. The core is made of high-quality cold-rolled silicon steel sheet, and the coil is made of high-quality oxygen-free copper, which is beautiful in appearance and safe in operation. Widely used in steel mills, urban and rural industrial and agricultural power grids.
Main functions and features:
High reliability, advanced performance level and reasonable economic indicators.

The iron core adopts step-shaped three-level joints, and the surface is painted with cured paint to reduce loss and noise.

New winding structure, reasonable oil channel design, and new insulation structure to improve mechanical strength and short circuit resistance.

The fuel tank has various forms, beautiful and generous.

220kV, 110kV and 66kV low loss series transformers; products with reliable performance, low partial discharge, low loss, low noise, high reliability, and strong resistance to sudden short circuit, its excellent performance has won the majority of users and related Experts highly praise.

Partial discharge: at 1.5 times the rated voltage, the apparent discharge of the product is less than 80pC;

Noise: Product noise of 63MVA and below is below 58dB (AN);

Loss: No-load loss is about 30% lower than the IEC standard;

Reliability: All in-service products have no damage accidents and oil leakage;

Short-circuit resistance: SFZ11-50000 / 132 has passed the short-term ability test of the Netherlands KEMA and the National Transformer Quality Supervision and Inspection Center laboratory. Passed CE, UL, CSA, ROSH certification

Rectifier Transformer
Rectifier Transformer (ZPS, ZBS, ZSS)
Product Introduction:
Rectifier transformer is for power transformer with rectifier device. Its role is to provide AC power for the rectifier. Then the rectifier will change AC power to DC power supply. Itâ??s mainly used in the metallurgy, chemical industry and some other industry. Itâ??s low-loss, low-noise, shock resistant, and short-circuit resistant. Rectifier transformer also has the advantages of strong ability of over-load, compact structure, small size, reliability of power supply. 
Product Features:
Stable electrical performance: combing the load feature and the status of fluctuation of electric grid and voltage, atmospheric over-voltage, according to the rectifier transformer load conditions, determine a reasonable and reliable insulation level and insulation model, to ensure the reliable and stable electric performance of the product. Environmentally safe coefficient of the productâ?§1.67.
High degree of dynamic stability: the winding has a high mechanical strength , with a strong ability of anti contingencies, to meet the bad environment of load. During the process of design and manufacture, it eliminates the dynamic unstable source caused by magnetic leakage or non-normal transportation. The product has high dynamic stability. The resistance is 30% higher than the power transformer with same capacity.
Good thermal stability: advanced product design. The heating part and temperature rise of the hottest dot are strictly controlled, with sufficient temperature margin. If necessary, additional axial oil duct can be added in the coil. Cooling way can be chosen according the load loss value of the coil, then to allocate the oil flow reasonably to reach the best cooling effect. Main temperature rising index is at least 5C lower than national standard. Copper wire is used as coil and down-lead, selecting low current density.
High ability of overload: the product comes with strong capacity of over-load and over-voltage. It can be operated safely in long-term under the condition of rated load. It can be operated safely in long-term under the condition of 100% full load ( environment temperature 40C);the terminal on the transformer connected with the motor can bear 1.5 times the rated current, which is 5S. Load character is fully considered during the product design and manufacturing. Temperature rising, insulation properties and choice if attachment are considered to meet the overload requirements.
Superior performance index: no-load current design. Manufacturing capacity is lower than that of normal transformers with same capacity that regulated by national standards.
Obvious energy-saving, low noise
Simplified structure, elegant appearance. The oil tank adopts the technology of anti-leakage to avoid the leakage, eliminating the fuel tank leakage.

ZS Series Rectifier Transformer,oil immersed power transformer,high quality oil transformer,oil immersed power thransformer
Oil Immersed Transformer
Rectifier transformers are widely used in electrolytic electrochemistry, transmission, traction, electrostatic precipitators, DC transmission and other systems which need direct current power supply. Our rectifier transformer absorbed the excellent experiences of same industry at home and abroad. Raw materials such as high magnetic silicon steel sheet and high quality oxygen free copper wire are used. We adopt production technology such as advanced integral assembly per phase for windings, the core are laminated by five step-lap method to reduce iron loss and noise, crimped winding connections, precision machining for tank surface and so on, which make technologic performance at the leading level in domestic. We can design and manufacture various types of products according to users requirement.
Model and Meaning
Technical Parameter of Rectifier Transformer
Model No. kVARated capacity Rated Voltage  Connection Group Symbol Weight|kg
KVgrid side VValve side Weight for Active parts Oil Weight Total Weight
ZSS-400/10 400 10 430 Dyn11 1015 380 1780
ZSS-500/6 500 6.3 400 Dyn11 1420 580 2800
ZSS-630/6 630 6.3 400 Dyn11 1550 620 3040
ZSS-650/3 650 3 3150 Dyn11 1255 540 2460
ZSS-800/6 800 6 400 Dyn11 1576 705 3045
ZSS-1000/6 1000 6 440 Dyn11 1837 838 3580
ZSS-1000/10 1000 10 420 Dyn11 2112 897 3860
ZSS-1250/10 1250 10 440 Dyn11 2205 1090 4410
ZSS-1500/10 1500 10 3300 Dyn11 2860 1205 5260
ZSS-1600/6 1600 6.3 400 Yyn11 2680 1145 5160
ZSS-1600/10 1600 10 420 Dyn11 3110 1150 5500
ZSS-1600/10 1600 10 660 Dd0 2750 1240 5310
ZSS-1750/10 1750 10 6300 Dyn11 2790 1190 5320
ZSS-1800/10 1800 10 650 Dd0 3060 1345 5795
ZSS-1900/10 1900 10 3300 Yd11 3353 1719 7180
ZSS-2000/10 2000 10 660 Dd0 3185 1990 7750
ZSS-2300/10 2300 10 420 Dyn11 3570 1495 7020
ZSS-2400/10 2400 10 750 Dyn11 3635 1535 7185
ZSS-2500/10 2500 10 630 Dyn11 4180 1582 7390

Rectifier transformer is a transformer which used as the source of rectifier equipment. And primacy side of rectifier transformer connected with AC power is called line side, and secondary side connected with rectifier is called valve side.
Our company use the advanced techniques and manufacturing process, and with domestic colleges and universities to develop a number of research projects. Using procedural design, insulation breakdown mechanism, the electric field numerical analysis and insulation technology, the impact of characteristics and anti-sudden short-circuit strength of winding, the loss of eddy current filed calculation are analyzed and calculated. With manufacturing experience on rectifier transformer for many years, our company has got major break-though on the basis of the traditional calculation, which will further improve the reliability and advancement of products.
Features about rectifier transformer:
1.The rectifier transformer load is non-linear impedance, and valve side windings of rectifier transformer would get the currents which contain fundamental and other high-order harmonic superposition. And line side also gets corresponding non-sinusoidal currents connected by rectifier circuit coupling method.
2.According to different requirements of various customers, the valve side of rectifier transformer has a variety of special coupling method, such as: dual-back-star with inter phase reactor, three-phase bridge, star-delta parallel, six-phase bridge by inter phase reactor.
3.To improve power factor and reduce the line side harmonic currents of high-power rectifier equipments, rectifier transformer is needed to use star-delta winding phase displacement, phase-shift windings by phase displacement, autotransformer phase displacement, to improve the number of pulse of rectifier equipment.
4.According to the user¡¡¥s process requirements, the rectifier transformer line side voltage is required (such as 220kV) straight down to a very low valve side voltage (such as 1kV). The valve side voltage of rectifier transformer is required within a wide range of on-load tap from 5% - 105%. Auto voltage regulator and main theme of unity, string variable voltage regulator and other ways are used in rectifier transformer to achieve the purposes of a wide range voltage.
5.Self-saturable reactor can be used to change over and stabilize voltage in order to smooth rectify voltage. And some use silicon control to regulate voltage.
6.Valve side current of high-power rectifier equipment is very large, reaching 100kA and even greater. To improve power factor and avoid partial overheating and uneven distribution of current rectification components, it¡¡¥s required the technology of reverse-phase parallel.
7.With the wide application of AC frequency control technology, newly developed three-crack drive rectifier transformer came into being. And the lower voltage valve side of this transformer cracked into three independent branches, which can be made to supply for three different load power, which achieve ¡¡ã multi functional ¡¡À effect, reducing loss and saving area.
8.In order to reduce the large current in the fuel tank and other structures caused by loss, the rectifier transformer used magnetic shielding technology and so on.
A number of 220kV and below and different kinds of rectifier transformers have been manufactured for the general industrial, electrochemical electrolysis, transmission, traction frequency, variable frequency power supply, DC power transmission and other industrial sectors over ten years, and got the user¡¡¥s high praise. Recently, the 220kV level on-load-tap rectifier transformers supporting the country¡¡¥s largest 600 thousand project of caustic soda is done, and got the high praise of users.

fumigation wooden case