Product Profile of Cast-Resin Dry Type Transformers
QRE Greenesol Power Transformers Company Pvt. Ltd. Manufactures Cast-resin Dry Type Transformers. QRE Greenesol Power Transformers Company Pvt. Ltd.
Offers various types of Transformers including Power Transformers up to 220 kV, Distribution transformers, Dry Type transformers, Box type transformers, Special
Transformers includes traction transformer, reactor transformer and rectifier transformer, etc. In Cast-resin Dry Type Transformers CAD and high quality silicon steel
Sheets are used and the flux density is made far lower than the saturation point, so harmonics in core and the noise are reduced.
Technical Characteristics of Cast-resin Dry Type Transformers are:
- The noise of transformer is originated from its core
- CAD and high quality silicon steel sheets are used and the flux density is made far lower than the saturation point, so harmonics in core and the noise are
Reduced.
- All clamped parts are buffered by silicon rubber and elastic components to reduce vibration and noise, and a specified resin is coated on the surface of core
For sound insulation.
- Low partial discharge and high electric intensity: The solid insulation composed of quality resin and glass fiber provides high dielectric strength and low
Partial discharge. The breakdown voltage is not less than 34kV/mm and the partial discharge can be less than 5pC.
- Flame resistance and non environment pollution: When transformer is on fire, heat generated from the composite insulation is extremely small [about
6.5mJ/kg], so that the fire can be automatically extinguished.
- Damp proof: It is able to operate at 100% of relative humidity, because both the core and the winding assembly are coated with resin. The transformer
Possesses high resistance to corrosion too. It also has high ability of over-loading high thermo-stability, less dimension and weight, easy to install and maintenance free,
Etc. Cast-resin dry type transformer is applicable to following cases, such as high buildings, commercial centres, airports, railway stations, wharfs, subways, plants, and
Underground substation.
Technical Specifications of Cast-resin Dry Type Transformers are:
- Voltage class: 10kV, 35kV
- Model of voltage regulation: off-excitation or on-load tap changer
- Power Capacity: 3-10000kVA
- Phase No.: single phase or three phases
- Vector Group: Yyn0 or Dyn11 or according to customers requirements
- Impedance voltage: please see data table or according to customers_ requirements
- Service condition: 100% relative humidity, ambient temperature not more than 40‘ or according to customer`s requirements
- Type of cooling: ONAN or ONAF
- Guard class: IP00, IP20, and IP23
- Thermo-tolerance class of insulation: F
- Insulation level: a. For 10kV class: LI75AC35; b. For 35kV class: LI170AC70
