Description

t Description

Transformer Electrical Insulating Paper DDP is made of imported pulp base paper, pure epoxy resin, and the most advanced foreign formula technology.

Product curing conditions:

First, keep it at 90℃±5℃ for 3 hours, then raise the temperature to 125℃±5℃ and keep it for 6 hours to achieve complete curing.

Storage:

Transformer Electrical Insulating Paper DDP should be stored in a dry and clean room with a temperature not higher than 25℃, and should not be near fire, heating or sunlight. The storage period is one year. If the storage period exceeds, it can still be used after passing the inspection.

Diamond dotted paper (DDP)
NO.	Project	Unit	0.08	0.13	0.18	0.2	0.25
1	Thickness & tolerance	mm	0.080±0.005	0.130±0.007	0.180±0.010	0.200±0.010	0.250±0.010
2	Density	g/㎡	0.85 - 1.1	0.85 - 1.1	0.85 - 1.1	0.85 - 1.1	0.85 - 1.1
3	Moisture content	%	4.0 - 8.0	4.0 - 8.0	4.0 - 8.0	4.0 - 8.0	4.0 - 8.0
4	Water extract PH	-	6.5 - 8.5	6.5 - 8.5	6.5 - 8.5	6.5 - 8.5	6.5 - 8.5
5	Ash content	%	≤1.0	≤1.0	≤1.0	≤1.0	≤1.0
6	Adhesive thickness	μm	6~12	6~12	6~12	6~12	6~12
7	Oil absorbency	%	≥20	≥20	≥20	≥20	≥20
8	Contamination to transformer oil		No contamination
9	Bond strength	KPa	Normal: ≥650 100℃±2℃: ≥400	Normal: ≥650 100℃±2℃: ≥400	Normal: ≥650 100℃±2℃: ≥400	Normal: ≥650 100℃±2℃: ≥400	Normal: ≥650 100℃±2℃: ≥400
10	Tensile strength	N/10mm	MD: ≥60 TD: ≥30	MD: ≥110; TD: ≥50	MD: ≥160; TD: ≥70	MD: ≥180; TD: ≥80	MD: ≥230; TD: ≥100
11	Elongation	%	MD: ≥2.0; TD: ≥4.0	MD: ≥2.0; TD: ≥4.0	MD: ≥2.0; TD: ≥4.0	MD: ≥2.0; TD: ≥4.0	MD: ≥2.0; TD: ≥4.0
12	Tear strength	MN	MD: ≥450; TD: ≥500	MD: ≥900; TD: ≥1000	MD: ≥1350; TD: ≥1500	MD: ≥1500; TD: ≥1700	MD: ≥2000; TD: ≥2300
13	Breakdown voltage	KV	In air: ≥0.8; In oil: ≥4.00	In air: ≥1.37; In oil: ≥7.00	In air: ≥2.00; In oil: ≥9.00	In air: ≥2.10; In oil: ≥9.80	In air: ≥2.25; In oil: ≥11.5

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