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The design and manufacture of epoxy resin poured transformer in Jinan Zhiheng Special Transformer Company adopts Germany Siemens technology. Our products have the following characteristics.

1. low PD

Windings adopt foil structure, so HV winding's neighborhood circles have only one et.(only 6 to 40V) which makes interceded insulation endure a very low working voltage. Thus, the electric field of windings can gain a good improvement and the PD value can live up to very low. These are the concentrated embodiment of foil winding's advantages.

2. high electricity capability

Initial distribution of thunder impact voltage along with windings affects spoiling degree of winding's insulation. Initial voltage distribution of HV foil windings near to be linearity, so dry type transformers have a good thunder impact endure ability.

Foil width of inding's is the reactance height and urrent follows the balance between ampere-turns, axial pull induced by short circuit of winding is nearly zero.

3. good resisting crack ability

Our transformer's windings adopt resin mixed with silicon poured and foil structure. We do many experiments resisting crack(e.g. alternating between cold and heat, heat impact, speediness lagging). The results of experiments show that our transformers can be used in occasions such as damp, high temperature and temperature varying in large range, and also satisfy requires for resisting crack after running a long time.

4. strong over-load ability

The heat conductivity factor of rosin mixed with silicon is 2 or 3 times of that of pure rosin. When transformers of the same power capacity have the same on-load loss, resin mixed silicon poured transformer windings has big thermal ability and thermal timer constant of windings can make itself have a strong over-load ability.

5. good environmental conservation character

The advantages of our dry type transformers are maintenance-free, protection against the tide, resisting damp and heat, flame retardant and self-extinguishing. They don't produce toxic gases even when exposed to an electric arc. The excellent flame retardant characteristic of our dry type transformers has been substantiated at burning experiment.

Our dry type transformers can well adapt to environments. They can meet the needs for environment level E2, climate level C2, flame retardant level F1.

6. low noise

Some special configurations and optimized designs adopted by our dry type transformers can greatly reduce noise. It's holistic noise level is lower more than 10dB(A) than state standard. So they can be used in shopping centres and residential area.

7. low loss

All loss of the production is lower than state standards.