| 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 good |
| insulation. Initial voltage distribution of HV foil windings near to be linearity, so dry type transformers have a |
| thunder impact endure ability. |
| Foil width of LV winding's is the reactance height and LV current 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 windings |
| transformers of the same power capacity have the same on-load loss, resin mixed silicon poured transformer |
| 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 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. |
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