Introduction
Insulation class: A (105 °C)
100% sulphate wood pulp
Natural-color
Precompressed pressboard, even fiber orientation, hard and dimensionally stable
High purity and mechanical strength
Low shrinkage, fiber-free surface
Good compatibility with liquid dielectrics
Product Description
Description and feature:
Duct strip is made from high quality pressboard G4 grade. It has excellent transformer oil impregnation feature, high compressive strength more than corrugated pressboard which is the old technology. It is used at high temperature condition and it could be improved the circuit strength.The character are below:
1. High mechanic strength
2. High electric strength
3. Accurate dimension
Application:
Oil duct strip provides duct for the flow of the cooling oil in layer and strip windings in distribution power transformers. It is manufactured by bonding transformer board sticks onto insulating paper or single-coated diamond dotted paper.
Main strips: Rectangular strips, T-strips, Pigeon cauda strips, Abnormity strips.
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.
TRANSFORMER OIL DUCT STRIP DATA SHEET
PART1: PRESSBOARD STICK4*5*1000MM
PART2: SINGLE SIDE DIAMOND DOTTED PAPER DATA SHEET
welcome all inquiry
Insulation class: A (105 °C)
100% sulphate wood pulp
Natural-color
Precompressed pressboard, even fiber orientation, hard and dimensionally stable
High purity and mechanical strength
Low shrinkage, fiber-free surface
Good compatibility with liquid dielectrics
Product Description
Description and feature:
Duct strip is made from high quality pressboard G4 grade. It has excellent transformer oil impregnation feature, high compressive strength more than corrugated pressboard which is the old technology. It is used at high temperature condition and it could be improved the circuit strength.The character are below:
1. High mechanic strength
2. High electric strength
3. Accurate dimension
Application:
Oil duct strip provides duct for the flow of the cooling oil in layer and strip windings in distribution power transformers. It is manufactured by bonding transformer board sticks onto insulating paper or single-coated diamond dotted paper.
Main strips: Rectangular strips, T-strips, Pigeon cauda strips, Abnormity strips.
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.
TRANSFORMER OIL DUCT STRIP DATA SHEET
PART1: PRESSBOARD STICK4*5*1000MM
| ITEM | TYPICAL VALUES | MATTER OF FACT |
| Thickness: mm | 4mm±7.5% | 4.1-4.3mm≤7.5% |
| Width | 5±0.5mm | 4.95-5.38mm≤0.4mm |
| Length of 1000mm: | ±5mm | 1000±3 mm |
| Pitch of stick centre: | ±3mm | 23±2 mm |
| Apparent density: g/cm3 | 1.1-1.2 | 1.18 |
| Moisture content ,% | 4.0 to 9.0% | 5.7 |
| PH water extract: | 6.0 to 9.0 | 6.8 |
| Ash content,% maximum | 1% | 0.51 |
| Tensile strength Mpa Machine direction: Cross machine direction: | ≥90 ≥50 | 107.4 101.3 |
| Oil absorption | ≥7.0% | 12.29 |
| Shrinkage rate% MD CMD Thickness D | ≤1.0 ≤1.4 ≤6.0 | 0.16 0.25 ≤5 |
| Elongation rate MD CMD | ≥3 ≥4 | ≥4.4 ≥4.4 |
| Conductivity of aqueous extract Ms/m | ≤10.0 | 5.03 |
| Dielectric breakdown:(Kv/mm )In Air In Oil | 10 24 | 16.7 35.7 |
PART2: SINGLE SIDE DIAMOND DOTTED PAPER DATA SHEET
| ITEM | TYPICAL VALUES | MATTER OF FACT | |
| Caliper: (millimeter) | 0.25mm | ||
| Thickness: mm | 0.25±0.025mm+0.06 | 0.260 (0.260,0.258,0.262) | |
| Width: mm | 1000±5mm | 1000-1005 | |
| Apparent density: g/cm3 | 0.9 to 1.1 | 1.01 | |
| Moisture content ,% | 4.0 to 8.0% | 5.6 | |
| PH water extract: | 6.0 to 8.0 | 7.5 | |
| Ash content,% maximum | 1% | 0. 43 | |
| Coating thickness per side mm | 0.006 to 0.012 | 0.011 | |
| Tensile strength,N/mm2 Machine direction: Cross machine direction: | 80 35 | 86.6 48.1 | |
| Dielectric breakdown: (volts/layer ,dry test) | ≥2100 | 2230 | |
| Bond strength: Kpa | 450kpa | 679 | |
welcome all inquiry