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11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
11kV Cast Resin Dry Type Distribution Transformer
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11kV Cast Resin Dry Type Distribution Transformer

The cast resin transformers are suitable for continuous indoor operation in a tropical climate on a 3 phase 50 Hz distribution system with solidly earthed neutral and maximum phase fault level shall be determined at 11 kV.
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application Details
Introduction
Epoxy dry-type transformers use epoxy resin as an insulating material. The high and low pressure windings are wound with copper strip (foil), and epoxy resin is poured in vacuum and cured to form a high-strength FRP structure. The insulation grades are F and H.
1.Phase: 3 phases
2.Rated power: 630kVA
3.Primary voltage: 11kV
4.Secondary voltage: 0.4kV
5.Frequency: 50Hz
6.Vector group: Dyn11
7.Insulation class: H/F Class
 
 
technical parameter
Technical Data

1.Improve electrical performance: low losses, low noise, low partial discharge, high-efficiency safe operation on 100% humidity.
2.Safety Operation: epoxy resin and insulating materials are the major material of our product,self-extinguishing and flameproof, no blast, no pollution, non-poison air, high moisture resistance, safe operation under 100% humidity, and other bad service environments
3.Simplify or free maintenance: durable and tiny design makes it easy to do quick check and cleaning process.
4.Lower operating costs: high moisture resistance and lower losses, less need for maintenance..


Product Parameters:

Technical characteristics for 630kVA 11 kV cast resin dry type transformer

Transformer  type Cast resin dry type transformer
Transformer Model 630kVA 11/0.4kV
Short circuit impedance 6%
Noise Level 50dB
Cooling mode AN/AF
Winding material Copper/Aluminum
Degree of protection IP00
HV tapping +/-2*2.5%
Insulation material Cast resin (HV)
Pre-impregnated (LV)
Insulation level Primary:  28kV AC
Secondary: 3kV AC
BIL 75kV for primary circuit
Type of installation Indoor
Maximum attitude <1000m
Standards IEC60076-11


Core:
1. The core is made of high quality grain-oriented cold-rollled silicon steel of high magnetic conductivity, by using 45°five-step overlapping method to reduce the no-load loss and no-load current.
2. Simulation analysis method is applied for the core design, thus to precisely and effectively calculate the vibration frequency and scale.
3. Flexible connections are adopted between the core and coils, core and clamps. With these measures, transformer’s noise level has been improved by 10-15dB over the conventional products.








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