3 Phase 33kv High Voltage Oil-Immersed Type Power Distribution Transformer

Advantage of materials

1. because we use oxygen-free copper lines of lower resistivity, which will become smoother and burr-free after series of additional surface treatment, so the load loss of our transformer is lower and the electric performance is better.
2. We use high-quality silicon-steel plates which are of lower unit loss, and no-load of the transformers is lower;
3. We use high-quality wooden laminating insulation pieces, which won't split or move even under the influence of short circuit;
4. We use thoroughly filtrated transformer oil containing less water ,gas and impurities, which makes our transformer work better;
5. We use high-quality rubber sealing material, which can prevent the transformers form aging or leakage;
6. All materials has passed the quality testing, and all the raw material factories has pass through the national standard ISO9000 inspection.

Typical test values and performances are performed in the painting lab on steel plates during the whole painting process in order to confirm the following:
• Minimum paint thickness film (ISO 2808): 70µm
• Specular gloss factor at 60 Deg (ISO 2813): 90 +/- 5%
• Falling weight test (ISO 6272): 1Kg/050cm
• Erichsen cupping test (ISO 1520): 08mm
• Scratch test (Adhesion ISO 2409): 0
• Bend Test (cylindrical mandrel ISO 1519): 3,0mm
• Salt spray (Fog) test (ISO 7253): Over 1000 Hours