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Description
Distribution transformers are normally located at a service drop, where wires run from a utility pole or underground power lines to a customer's premises. They are often used for the power supply of facilities outside settlements, such as isolated houses, farmyards or pumping stations at voltages below 33 kV. Another application is the power supply of the overhead wire of railways electrified with AC. In this case single phase distribution transformers are used.
The number of customers fed by a single distribution transformer varies depending on the number of customers in an area. Several homes may be fed off a single transformer in urban areas; rural distribution may require one transformer per customer. A large commercial or industrial complex will have multiple distribution transformers. Pad mount tansformers are used in urban areas and neighborhoods where the primary distribution lines run underground. Many large buildings have electric service provided at primary distribution voltage. These buildings have customer-owned transformers in the basement for step-down purposes. In a secondary network system as used in urban areas, many distribution transformers may be connected in parallel, each equipped with its own network protector circuit breaker to isolate it from the secondary network in case of a fault.
Distribution transformers are also found in the power collector networks of wind farms, where they step up power from each wind turbine to connect to a substation that may be several miles (kilo meters) distant.
Rated capacity: 2500kva
Standard: IEC60076 ANSI BS GB
Cetification: ISO CCC PICC
Phase: 3
Power frequency: AC 50Hz/60Hz
High voltage: 11kv
Vector group: Yyn0 Dyn11 Yd11 Dyn5 Dzn5
Coil material: Copper / Aluminium
Core material: CRGO sillicon steel
Insulation level: A
Insulation liquid: Mineral oil #10 / #25 / #45 NON-PCB
Tap changer type: On load tap changer/Off load tap changer
Tapping range: ±2x2.5% / ±2x5% / ±4x2.5% / ±8x2.5%
Temperature rise: 60/65 oC
Lightning impulse insulation level: 75kv
Cooling system: ONAN/ONAF
Altitude: 1000M
Ambient temperature: -25 to +40 oC
Jubang Electric Co., Ltd. is a model non-affiliated enterprises focus on development, manufacture, sales and service of electric products. We have 4 wholly owned subsidiaries: Shanghai Jubang Electrical Co., Ltd; Zhejiang Afahai Switch Co., Ltd; Zhejiang Jubang Electrical Power Co., Ltd and Jubang Electric (HK) Co., Ltd. 2 divisions: distribution division and transformer division. As one of the biggest electric suppliers in domestic, we devote to providing comprehensive electrical system solutions for distribution network, machinery, construction, telecommunications, metallurgy, petrochemical, railway industry and areas. Our product including high and low voltage complete sets of equipment, cabinet substation, SF6 inflatable cabinet, loop network cabinet, power transformer, distribution appliance, terminal appliance, middle and high voltage circuit breaker, fire fighting appliance and other series.
Being high-tech enterprise, Jubang wins honor of "National User Satisfying Enterprise", "National Second-level Safety Standardization Enterprise", "The Most Growing Private Enterprise of China", "Zhejiang Standard Innovation Type Enterprise", "Zhejiang Business Enterprise Credit AAA Level Unit Loyally Abiding by Contracts and Credits"; Jubang trade mark is one of the "Chinese Famous Brand" and "Zhejiang Famous Brand"; Jubang wins the honor of "Zhejiang Well-known Firms". Jubang's subsidiaries have already passed ISO9001 quality management system, ISO14001 environmental management system, three OHSAS18001 Occupational Safety and Health Management System certification. Its product passed mandatory product certification by China Quality Certification Center, the PCCC certification and energy-saving products certification for compulsory product certification, some of products are included in the "National Torch Plan Project", "National Spark Program Projects", "Zhejiang Major Science and Technology Special", "Zhejiang Science and Technology Award", "Wenzhou Famous Brand Products" and so on. It own more than 20 patents for invention and utility.
Our company devotes to developing and innovating of electric products. We imports foreign advanced technology and equipment, owns automatic and standard production line. We rely on the policy of self-dependent innovation and horizontal alliance, forming "Intelligent Electric Institution" and "Expert Working Group" with Zhejiang Technical College. Our products are in high technology with good quality, and well sale in Europe, America, the Middle East, South Africa and other more than 40 countries. We adhering to develop concept of "professional, different and refine", provide environmental protection, high-tech, intelligent and miniaturization electric product for our customers, to create a multi-win environment in which society satisfied, customer benefited, labor and wage increased together.
