Resin Casting Dry Type Power

Transformer

General :     

SC(B9),SC(B)10Resin casting dry type power transformer product by our company is a new generation of product in low loss and noise. Base on the FRVT processing technology imported from ABB-Micafil Co. in 90's, advanced technology of vacuum resin casting and L.V. foiled winding as well as the updated equipment such as GEORG cutting line, Stollberg winding machine and HUBR vacuum resin casting equipment all imported from Germany, and foiled winding machine imported from Italy, product performance is up to IEC726, GB6450, GB/T10228-1997 Standard.

The product owns its advantage such as low loss and noise, small size, less weight, moisture-proof, anti-dirty, crack-proof, withstanding impulse, flameproof, overload capability, smaller partial discharge (less than 10 PC).

It has reasonable structure and convenient operation& maintenance. When the BWK series temperature controlling system is provided for dry type transformer, it has more functions including alarming to faults and abnormal temperature, automatic tripping and automatic starting (stopping) fans to ensure its safe operation.

It is applicable to transmission and distribution system, hotel, restaurant, high building, commercial center, stadium, petrochemical factory, metro, station, airport, drilling form in the sea and so on, particular to the places of load center, or the places where require fireproofing specially.

Feature :

Adopting advanced technology and high quality raw material, with first class equipment and strict processing, SC-series resin casting dry type transformer owns the following advantages:

1. Copper conductor is used both for H.V. &L.V. coils to strengthen the glass fiber. It is dried and cast by epoxy resin under the high vacuum. After curing, it is a firm cylinder, with high mechanical strength and withstanding short-circuit capability, smaller partial discharge, higher reliability as well as long service life.
   
   
2. Flameproof, explosion resistant, no pollution to environment. Because the imported epoxy resin and glass fiber compound insulation materials are used and certain silicon powder is contained in the epoxy resin. Heat conduction co-efficient and flameproof ability is greatly improved in comparison with old type materials. There would be no toxin and harmful gas caused by resin under high temperature.
   
   
3. The moist cannot be absorbed by coils. The core clamp is coated with the special anti-corrosive materials so it can do as usual under the severe conditions. It is unnecessary to get rid of moisture for interval operation.
     
4. Good capabilities of withstanding short-circuit and lightning impulse.
   
   
5. Good heating dissipation due to thin resin coated on the outside of coils. Normally, natural air cooling (AN) is taken. Fan cooling system could be provided with the transformer in any protection grade to improve short time overload ability and ensure the safe operation.
   
   
6. Low loss and noise, energy saving, economical operation, free from maintenance.
   
   
7. Small size, less weight, little occupied area, and few cost for installation. It is unnecessary to take consideration of drainage pool, fire proof and fire fighting facilities, as well as standby power source.
   
   
8. Without any risk of fire disaster, explosion, it could also be installed separately around loading center, close to electric consuming place, so the wiring costs can be reduced and more costs can be saved.

Type designation :

Technical parameter :

Specification :
    Voltage class : 6 -35KV
    Capacity range : 30 - 10000KVA
    Voltage adjustment mode : No-load tap changer or on-load tap changer (fitted with vacuum or on-load tap changer )
    Tapping range : +/- 2x2.5%        +/- 4x2.5% (or others)
    Frequency : 50Hz or 60Hz
    Phase number : Three phase
    Vector group : Yyn0; Dyn11; Yd11 or others
    Short-circuit impedance : Standard impedance ( requirement by customer)
    Working condition  : relative humidity 100%, ambient temperature no more than 40 degrees centigrade   
    Max. temperature rise  : 100K
    Cooling mode : natural air cooling (AN) or  fan cooling (AF)
    Protection grade  : IP00; IP20(indoor ); IP23(outdoor)
    Insulation grade  : F grade
    Insulation level :
    10KV  Power frequency withstanding voltage 35KV, impulse withstanding voltage 75KV;
    20KV  Power frequency withstanding voltage 50KV, impulse withstanding voltage 125KV;
    35KV  Power frequency withstanding voltage 70KV, impulse withstanding voltage 170KV;

Technical parameter of 10kV product :

Ordering Notes :

      1.Type
      2.Rated capacity
      3.Phase number, rated frequency
      4. Rated voltage(L.V. &H.V.)
      5.Vector group
      6.Short-circuit impedance
      7.Cooling mode
      8.Temperature controlling and indicating device ( with computer interface or not)
      9.Protection degrade and enclosure material ( its color)
      10.Service condition: elevation height, environmental temperature, etc
      11.Ordering quantity and delivery time
      12.Special requirement