Distribution Transformer power transformer step up step down transformer
The partner of State Grid Corporation
The partner of National Railway Administration of China
ISO9001, TUV, and CE standard
The transformers electrical design results mainly from:
• Power rating,
• Primary and secondary voltage levels,
• Ambient temperature and temperature rise,
• Altitude of installation,
• Short-circuit impedance,
• Vector group,
• No load losses,
• Load losses,
• Permissible tolerances,
• Other particular conditions.2.Oil-immersed and three-phase distribution transformers
2.2.Rated power:50-2500 kVA
2.3.Rated frequency: 50 Hz
2.4.HV rating: up to 36 kV
2.5.Taps on:2.5 % or 2 x 2.5 %
2.6.HV side:As request
2.7.LV rating: 400-720 V(special designs for up to 12 kV can be built)
2.8.Connection: HV winding: delta
LV winding: star(up to 100 kVA: zigzag)
2.10. Protection class: IP00
2.11.Final coating:RAL 7033 (other colours are available)
Distribution transformers are the end equipment before electricity reaches the consumer. They provide low voltage by transforming the network medium voltage.
In most cases, transformers are designed as liquid filled particularly as oil immersed type.
These transformers have usually a power ranging from 50 to 2500kVA, with a maximum operating voltage of 36kV.
The magnetic circuit is of the three column type with mitred joints. It is manufactured with first-rate, grain oriented silicon iron sheets insulated with carlite. The mounted core is clamped down in order to reduce vibrations and minimise noise levels.
The windings are made of either copper or aluminium; they are insulated with either pure cellulose or double enamel. Furthermore, the complete columns are manufactured to withstand short circuit stresses.
4.3.Off-circuit tap changer
The tappings (±2 x 2.5%) of the HV winding, are connected to the off-circuit tap changer located horizontally between the yoke and the tank cover. The handle is located on the cover and should be operated when the transformer is deactivated. The design prevents setting the off-circuit tap changer to intermediate positions. The mechanism can also be padlocked during normal transformer operation.
The mineral oil with its electrical and chemical characteristics is in compliance with the IEC Standards and is P.C.B. and P.C.T. free.
4.5.Tank and cover
The sides of the tank are made of corrugated cooling surfaces. The bottom plate, side and frames are of a welded construction. The welds are tested for oil tightness. The thermometer pockets, bushings, tap switch drive and lifting lugs are fitted on the tank cover. The cover is bolted to the tank frame. The undercarriage is welded to the bottom plate and the rollers are suitable for either longitudinal or transverse movements.
4.6.Painting and surface treatment
Transformers are either hot-dip galvanized or painted. The metal parts are carefully sandblasted. The painting system is a single coat one pack epoxy. The top coat is RAL 7033 or customized. The hot-dip galvanizing is 70 µm minimum.
4.7.Options and accessories
- Plug-in bushings on HV
- Max thermometer
- Dial type thermometer with two contacts
- Oil level indicator for hermetically sealed transformers
- Off-circuit tap changer with 3 or 7 positions
- Sparking gaps
- Pressure relief device
- Cable boxes
- Integrated pole brackets on tank
- Skid base
- Bi-directional rollers
- Total enclosure on cover over HV and LV Bushing
The transformers are manufactured in accordance with ISO 9001 and ISO 14001. At the end of the manufacturing process the transformers are individually tested in accordance with the IEC Standards.
4.9.The routine tests are:
- Measurement of the winding resistance
- Measurement of the voltage ratio and check of the vector group
- Measurement of the impedance voltage and measurement of load losses
- Measurement of no load losses and no load current
- Dielectric tests
Upon request, witnessed type/special tests can be carried out. 5.Company IntroductionShandong Yangxin Genshen Electric Co., Ltd (GSE) was founded in 2012 and her subsidiary,Qingdao Yaoutongxing International Trading Co.Ltd, is founded in Qingdao. registered capital of 50 million yuan, covers an area of 50 acres, production workshop 15000 square meters, 150 employees, annual sales reached about 80000000 yuan is a high-tech enterprise integrated R&D, production, sales.
GSE have advanced production lines, testing equipments, ensuring the products with excellent quality. " Survive on high quality and seek development with prestige " is GSE principle, "customer first, quality first" is GSE purpose; "service above all, responsibility above all". We are committed to the prosperity and development of electric power and security. We sincerely welcome both domestic and overseas customers to come and visit us.
6.CertificateGSE is one of the strongest influence and expertise enterprises in North China, with ISO9001 quality management system, OHSAS18001 occupation health and safety management system and ISO14001 environmental management system certification, 3C certification.7.GSE Main ProductGSE main products: electric meter box, cable casing, high and low voltage electrical switchgear, transformer, box type substation, cable branch box, distribution box, ring network cabinet, JP cabinet, power distribution box, low voltage reactive power compensation control cabinet, electric energy metering box, high voltage metering device, porcelain insulator, composite insulator, transformer oil, electrical equipment, instrumentation, and insulated wire wire and cable, communication cable, cable accessories, monitoring equipment, electrical fittings and electrical equipment processing, Glass fiber reinforced plastics material with sheath (SMC), PC+ABS material metering box system Products, electric vehicle charging equipment, photovoltaic power generation equipment (excluding generators), wind power equipment production and sales.8.QA
8.1.Q: Are you manufacturer?
A: Yes, we are manufacturer. Our factory is in Binzhou City, Shandong Province.
8.2.Q: Can I get guarantee of products?
A: Yes, every product is 1 year quality warrantee under customer correct using the products.
8.3.Q: Do you have any Certificate?
A: Yes. Each of our unit has CCC certificate. All the electric parts with CE certificate, If you need any other Certificate, we can help you to get it.
8.4.Q: How to buy it? What about the delivery?
A: Please contact me by email or online, let me know your situation, I will give you professional solution.We have shipping agent can choosing the cheapest and fastest delivery. FOB,CIF, C&F or EXW are no problem for us.
8.5.Q: How can I pay you?
A: T/T, L/C is very well used.
8.6.Q: What about the production?
A: Produce time is 4~6weeks.
8.7.Q: Could you offer some spare parts?
A: Yes, no problem.
8.8.Q: What about the maintenance?
A: All the goods past the test, maintenance is very easy.
Should you have any problem,please contact with us,we will reply to you in 24 hour.
Manager: Liu Zehui