Low, medium and high voltage transformers
110kV Class Power Transformers
General
The110kV class low loss transformers are developed by Huapengour workshop through years of service experience and careful analysis of the advantages and disadvantages of the transformers of different manufacturers, both domestic and abroad, and are featured by low loss, low partial discharge, low noise, high strength against short circuit, and high reliability in service. Its outstanding performance has won high reputation throughout China, and the world, and are highly appreciated by experts of the circle. Transformers can be made with welded tank cover and/or flange , Thus obviated from the necessity of lifting out the active part for inspection after arrival on site.
Partial discharge level:
apparent discharge < 80pC at 1.5 times rated voltage.
Noise level :
below 58 dB for transformers 63MVA and below with AN cooling
Losses:
no-load loss 30% lower than specified by GB/T 6451-1995
Reliability:
no damage or oil leakage have been found in transformers in service up to the present
Short-circuit withstand capability:
Our SZ9-31500/110,SSZ-50000/110 transformers successfully passed short-circuit test in National Transformer Quality Inspecting and Testing Center, and in CESI Laboratory of Italy.
Winding
1. Partially interleaved continuous winding is used for HV winding to improve its behavior under lightning impulse, because of its more uniform voltage distribution.
2. All the spacers and vertical strips are rounded at corners, in order to obtain a more reliable insulation structure.
3. Zig-Zag directional flow is provided inside the windings, so that all parts of the windings are better cooled, resulting in lower winding temperature rise, and specifically lower hot-spot temperature, thus the insulation life of the transformer is prolonged.
4. Separate regulating windings are provided for both the 110kV high voltage and the 35kV medium voltage side, so that a more balanced ampere-turn is obtained in spite of tap-changing, the short-circuit withstand capability is thus promoted. Radially, the windings of a phase assembly are tight-fit, little space is left between the core and the low-voltage cylinder, and between the windings. All the vertical strips and cylinders are thoroughly dried before assembly, so that a tight phase assembly can be finally obtained.
Core
1. High permeability grain oriented high quality cold-rolled sheets are used for the fabrication of core. The sheets are cut on automatic cutting line made by Georg Co. of Germany or Soenen Co. of Belgium. The burrs are controlled within 0.02mm.
2. The core is stacked without stacking the upper yoke, the upper yoke sheets are placed into position after the winding blocks are mounted on the core. The joints of the core sheets are mitred 45fpjoint with step-lap. The stacked core is pressed under even pressure and the edge of the sheets are painted with epoxy resin, so that a straight, robust, integral structure is obtained, helping to reduce core loss and noise.
3. Wooden strips are driven into the space between core and LV cylinder. The yoke is kept tightened by epoxy-resin impregnated glass tape, while the lower yoke is pressed against the wall of the lower tank through threaded bolts. The active part of the transformer is in addition kept in position by devices at three places between the upper yoke and the tank cover in such a way that the active part cannot be displaced during transportation.
Various Transformers manufactured in South Korea
We are regular suppliers for all kind of plastic and metal and we ship to any destination port worldwide on CIF basis. interested buyers should contact us for more details and quotes
Description Multi Tap Transformers allow greater flexibility in managing multiple wire runs by moving cables up and down the multi range. Our Resin Sealed Transformers ensure highest possible efficiency & reliability. Features Low Voltage Transformer ranging from 75 W - 1200W 120, 277 /12, 13, 14, 15V with Toroidal /EI. 50/60 Hz Protection for each output circuit. Photo cell Option Rainproof Enclosure Stainless Steel / Powder Coated.
Tianjin New Ventech Electronic co.,LTD was established in 1993, which is a professional China manufacturer on variety electronic transformer including coil inductors, PCB mount transformer, toroidal transformer ,high voltage transformer etc. Now we have more than 800 staff, in which there are nearly 60 technical engineers, and 80% have more than 20 years experiences. With continuous hard work, our r&d department researched 8-10 kinds new products averagely every year, and now we have strength to custom-made as per your demand.Our products include: 1.Toroidal transformer 2.PCB mount transformer 3.Common mode choke. 4. Switching transformers 5.low frequency transformer 6.high frequency transformer 7.high voltage transformer We are certified of RoHS, UL, CE environmental protection standard, ISO9001: 2000, ISO14001: 2004 and ect. We offers high quality products with the most competitive price. It is our company's basic of success. The operation idea of our company is do everything we can, satisfy customers'need. Under working hard in this principle, we become a popular manufacturer by customers, investors, and partner company.This site is constantly being updated. If the information you require is not shown please contact us directly. The size of the pallet is 80*120mmm carons on the pallet.
Product Details : The Transformer used in the power supply unit is manufactured as per the UL norms. The transformer will be potted/sealed in an enclosure using Epoxy (a mixture of Resin Hardener) which ensures high reliability and efficiency. The enclosure is made up of Prime Stainless Steel material SS 304 grade (also carbon steel with powder coated enclosure can be provided on request ) Block Terminals will provide the easiest way for the customer to connect the secondary tappings. Photocell and timer connected as per the customer's needs. A circuit breaker of 25A is provided for circuit protection. Technical Details Wattage - 300w Frequency - 50/60 Hz Pry. voltage - 120V /277V Sec... voltages As per customer requirements Insulation class F, H Max. regulation 10% Dielectric 2000v, primary to secondary for 1 second. Dielectric 2000v, all windings to lamination for 1 second.
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First of all, we are a full-service company located in Hillsboro OR USA. We have at this time 2 brand new high Voltage transformers for sale. Please reply if you are interested and you need more information. Thanks in advance, Daniel.
First of all, we are a full-service company located in Hillsboro OR USA. We have at this time 2 brand new high Voltage transformers for sale. Please reply if you are interested and you need more information. Thanks in advance, Daniel.
Rated frequency 50Hz or 60Hz Rated secondary current 5A or 1A Rated short-time thermal current 40kA,1s Rated insulation level 12/42/75 kV Ambient temperature 25~40 Altitude Up to 1000m above sea level Indoor device Standards The product performance is in accordance with GB20840.1 GB20840.2 and IEC61869-1 IEC61869-2 standards.
