Description
Product description
The Diamond dotted Paper is to be used in oil-immersed transformers for the insulation between of coils. On the insulation layer, there is a layer dotted epoxy resin that will be changed with high temperature change that is to be called as felt.
It is a kind of material with inertia, dry and no conglutination at normal temperature (below 30¡ æ ), The Diamond Dotted Paper (DDP)will make the electric conductor forever felt up as a hard unit under the high temperature by its internal latency substance. When the temperature is rising up to 90¡ æ , The Diamond Pattern Paper (DDP)begins one-off thaw and then one-off solidification. When to keep the temperature at 90¡ æ For 90 minutes, the epoxy resin would paste on neighboring cable and paper safely. The felt intensity is as high as to 70psl at 100¡ æ . (The value at least is equal to 0.450Mpa) (IEC standard).
Application:
It is used in Oil-immersed Transformers for insulation between coils. The advantage with partially coated insulation press paper lies in the internal strengthening of the coil from adhesion to the conductor; this provides passage for quick evacuation of air and moisture during the drying process. It also minimizes the risk of partial discharge,quick impregnation and flow of oil through the channels. The bonding strength of the epoxy resin is sufficient to prevent displacement of winding layers due to short circuit forces.
Test Report
Product Name: Diamond Dotted Paper (DDP)Test Method used: KLYQB/T5133-85Manufacture: Kang Liyuan Science & Technology (Tianjin) Co.,Ltd.Date: January, 2019 | Test No. | Item | Unit | Qualified Data | Test Data |
| 1 | Length | mm | 0.08±0.01 | 0.08 |
| 2 | Width | mm | -- | |
| 3 | Tightness | g/cm3 | 0.95-1.05 | 1.01 |
| 4 | Tear Strength(horizontal) | MN | ≥5700 | 5765 |
| 5 | Tensile Strength(vertical) | KN/M | ≥38 | 38.6 |
| 6 | Tensile Strength(horizontal) | KN/M | ≥18 | 18.5 |
| 7 | Bonding Strength | MPa | ≥400 | 404 |
| 8 | Moisture Content | % | 6.0-9.0 | 6.7 |
| 9 | Breakdown Voltage | KV/mm | ≥45 | 45.6 |
Conclusion and Result:
PASS
Kang Liyuan Science & Technology (Tianjin) Co.,Ltd.
Technology Center |
Tested by: Yang Ding Inspected by: Tianfeng YangFAQ
Q: How long is your delivery time?
A: Generally it is 3-5 days if the goods are in stock. Or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: How can you guarantee the quality of mass production is same with the sample sent to me before?
A: Our warehouse staff will leave another same sample as yours. The production process will be under your requirement.
Q: What is your terms of payment ?
A: Payment≤1000USD, 100% in advance. Payment≥1000USD, 30% T/T in advance ,balance before shipment.
Q: Can you give me a discount price?
A: It is depending on the volume. The larger the volume, the more discount you can enjoy.
Q: Why is your price a bit higher than other Chinese suppliers?
A: To meet the requirement of different customers and areas, our factory manufactures various kinds of quality for each item at a wide range of price. We can offer the products of different quality levels depending on customer's target price and quality requirement.
Q: How can you guarantee the quality of mass production is same with the sample sent to me before?
A: Our warehouse staff will leave another same sample in our company, with your company name marked on it, which our production will be based on.
Q: How can you deal with quality issues that customer feedback after receiving the goods?
1) Customers take photos of unqualified goods and then our sales staff will send them to Engineering Department to verify.
2) If the issue is confirmed, our sales staff will explain the root cause and take corrective actions in coming orders.
3) Finally, we will negotiate with our customers to make some compensation.
Packaging & Delivery
Packaging Details: Normal Export Packing, Wrapped with plastic film , Moisture proof; then packed with plywood pallet.
Delivery Detail: Within 15 days after receiving T/T payment ( at least 30%)Please contact us
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