Diamond Dotted Paper

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seat: Shanghai
Validity to: Long-term effective
Last update: 2019-08-05 22:35
Browse the number: 197
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expoxy resin Electric transformer Insulation Diamond Dotted Paper (DDP) 

Kraft paper is abailable with both sides of diamond dotted pattern expoxy resin, which is cnsisted of 9.5mm x 9.5mm diamonds with 15.9mm center spacing. 

It is to be used in oil-immersed transformers for the insulation between the coils. The dotted epoxy resin melts at high temperature.Diamond dotted electrical materials insulating paper.is produced by coating modified epoxy-resin in diamond-dotted patterns on electrical insulating paper.This design improves the mechanical strength of oil-immersed transformer winding without reducing partial discharge levels. It is suitable for turn-to -turn insulation of coil wires on oil-immersed power transformers and suitable for layer insulation of coils on distribution transformers.

The Diamond Dotted Paper 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 degree C. The Diamond Paper begins one-off thaw and then one-off solidification .When to keep the temperature at 90 degree C for 90 minutes, the epoxy resin would paste on neighboring cable and paper safely. The felt intensity is as high as to 70psi at 100 degree C (The value at least is equal to 0.275Mpa, America standard).

 

Product Technical Data:

No.

Property

Unit

Specification and Parameter

1

Nominal Thickness

mm

0.08

0.13

0.18

0.38

0.5

2

Thickness Tolerance

mm

±0.005

±0.007

±0.010

±0.020

±0.030

4

Density

g/mm3

0.85-1.10

5

Single Thickness

μm

10-15

6

Moisture Content

%

4.0-8.0

7

Oil Absorption

%

≥60

8

Bond Strength

Normal

kpa

≥60

100°C±2°C

≥60

9

Pollution for Transformer Oil

 

No pollution(Δtanø<0.001)

10

Tensile Strength

Lengthwise

N/10mm

≥60

≥110

≥160

≥180

≥230

Crosswise

≥30

≥50

≥70

≥80

≥100

11

Tearing Strength

Lengthwise

Mn

≥450

≥900

≥1350

≥1500

≥2000

Crosswise

≥500

≥1000

≥1500

≥1700

≥2300

12

Breakdown voltage

Air

kV

≥0.88

≥1.37

≥2.00

≥2.10

≥2.25

Oil

≥4.40

≥7.00

≥9.00

≥9.80

≥11.50

13

Curability Condition

~

Heat to 90±5℃, keep 3 hours until temperature to 125±5℃, keep 6 hours until curing

14

TI

~

105℃ (Class A)


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