Resin Insulation Dry Type Transformer Scb - China

Resin Insulation Dry Type Transformer (SCB)

Dry Type Transformer

Our company’s dry type transformer is made of epoxy resin and adopts foreign advanced technology and CAD design.

The core is manufactured with high quality cold rolled grain-oriented silicon steel and steps overlapping structure is also adopted for the core design, thus to greatly reduce no-load loss.

Winding is manufactured with high quality epoxy resin, coil casting process is completed by automatic vacuum casting equipments.

The epoxy resin is with characteristics of good penetrability and no bubbles, so its partial discharging volume is small.

Dry-type transformers with advantages of strong overload ability, good thermal stability, small size, light weight, easy to install, exemption from maintenance can be widely used in high-rise buildings, commercial centers, airports, railway stations, docks, subways, factories and underground distribution stations.

Products structure

Core: The core is manufactured with high quality cold rolled grain-oriented silicon steel and step overlapping structure is also adopted for the core design.

Magnetic circuit structure is improved and the magnetic flux density of steps overlapping joints is lowered.

Because of first-class equipments, high quality silicon steel and advanced technology, the no-load capacity is greatly improved.

Compared with normal cores, no-load loss, no-load current and noise are respectively reduced by 5-6%, 20-30%, 6%.

Coil: HV winding is casted with high quality epoxy resin at vacuum state with pressure; LV winding is manufactured with high quality foil conductor.

Advanced technology guarantee the small partial discharging volume, high capacity of short circuit impendence.

The regulation range of H.

V winding is Un±5% and Un±2x2.5%, on-load regulation range is wider.

Temperature controlling device: Function with fault alarm, over-temperature alarm, over-temperature trip, three-phase inspection, start and stop air cooling devices, etc.

Cooling devices: Using axial fan with low noise, uniform wind and easy to install, etc.

Installation of cooling fan can overload about 40% in the long term.

Technical features

1, Noise of transformers come from cores.

Our factory makes use of advanced Step-Lap technology to improve magnetic distribution in core.

With its special advantages, lower transformers’noise.

2, Design of products adopts CAD.

Choose high quality silicon steel and low flux density which can leave far away from the saturation point, so amount of harmonics will be decreased, then noise will be lowered.

3, All clamping parts are made of silicone rubber and elastic element to butter, so can reduce the amplitude, noise, while the outer of core is coated with a certain thickness of the resin, it plays a sound effect.

4, Small partial discharging volume and high electric strength.

Solid insulation combined with high quality epoxy and glass fiber has very high electric strength(breakdown strength is not less than 34kV/mm).

Partial discharging volume is small, can be controlled within 10pc.

5, Flame retardant and no pollution to the environment.

The heat produced when resin epoxy and glass fiber composite insulation materials burn is very small (about 6.5mJ/KG), so it is hard to flame and can extinguish automatically.

6, Damp proof, can safely work under conditions of 100% damp.

Dry type transformer’s core is coated with epoxy and its winding is completely casted by epoxy resin, so it can work under 100% damp and has strong corrosion protection capacity.

Specification

Voltage level: 6-35kV

Capacity: 30-20000kVA

Regulation mode and tapping range: Un±2x2.5% (or±5%) no excitation, Un±4x2.5% (or ±5%) on -load voltage regulation

Frequency: 50Hz

Phase: three-phase

Vector group: Yyno; Dyn11; YNd11 (or according to customers’requirements)

Short-circuit impedance: standard impedance(see specification table)

Working environment: altitude less than 1000 meters; environment temperature lower than 40°C.

(If the working surrounding exceeds these limits, special design and manufacturing process should be involved according to related standards)

Insulation and heat resisting level: F, the upper limit of temperature is 155 °C, and the limit of temperature rise of the winding is 100K.

Cooling mode : natural air cooling (AN), forced air cooling (AF)

Insulation level:

A, 6kV-type transformer: main frequency withstand voltage is 25kV, impulse withstand voltage id 60kV

B, 10kV-type transformer: main frequency withstand voltage is 35kV, impulse withstand voltage id 75kV

C, 20kV-type transformer: main frequency withstand voltage is 50kV, impulse withstand voltage id 125kV

D, 35kV-type transformer: main frequency withstand voltage is 70kV, impulse withstand voltage id 170kV

Company Contact:

• Posted By: CHANNEL INTERNATIONAL LTD.

• Phone: +86-021-61071577

• Address: NO.248 Yangshupu Rd.,Hongkou Dist, Shanghai , Shanghai , China

• Email:

• Website: http://www.ehearttransformer.com/

• Business Description: Channel International Ltd., is a comprehensive enterprise, combining research, manufacture, sales and service as a whole; has office at Beijing, Shanghai, Hong Kong; has built up a complete service system.
  
  Our production base locates in shuanglou industrial zone, Haian city, Jiangsu province which lay in north of beautiful and rich Yangtze River delta, east of the Yellow sea, south of Yangtze, and also close to Nantong, Yangzhou, Taizhou airports.
  
  Xinchang railway, Ningqi railway , G15 Shenhai highway and Qiyang highway intersect here.
  
  204 and 308 national ways are passing through our factory.
  
  All of above prove that we have obvious regional advantages which are suitable for water , land and air transportation.
  
  Our factory specializes in the manufacture of power transformer, rectifier transformer, Box-type transformer substation, wind power transformer and its complete sets of products.
  
  We occupiers an area of 26500m2, of which construction area is 13800m2; fixed investment is RMB 35, 800, 000 ; We have many main product equipments and full sets of inspection equipments , such as vacuum drying system, automatic vacuum casting system , corrugated oil tank product line, slitting line, horizontal cutting line and automatic foil winding machine and son on.
  
  Our technology is strong , manufacture process is advanced, equipments are excellent and testing modes are complete.
  
  Meanwhile, we have a professional team that everyone has sense of responsibility, exploiting and innovating.
  
  We have advanced design concepts , we can grasp the pulse in the design filed of the transformer exactly and form unique thinking of special design, manufacturing and market development.
  
  We also have passed ISO9001 quality management system , ISO14001 environment management system and PCCC certification.
  
  Our products performances are superior to national standards and IEC standards.
  
  We have got the approval of National Transformer Quality Supervision and Inspection Center.
  
  We have won the honored certificates like Jiangsu High and New Technology Enterprise and Jiangsu Quality Believable products.