Oil Duct Strut for Transformer Insulation Strips/DDP Duct Strip/Insulation Material

• Application: Insulators, Electrical Winding Insulation, Winding Wire Coating Insulation, Electrical Base, Shell, Motor, Insulating Varnish, Switch Baseplate
• Type: Solid
• Chemistry: Organic Insulation
• Material: Paper
• Thermal Rating: A 105
• Maximum Voltage: >100KV
• Model NO.: KLY-LSYD
• Classification: Organic Insulating Material
• Certification: ISO9001
• Color: Brown
• Transport Package: Pallet
• Trademark: Kang Liyuan
• Origin: China
• Production Capacity: 50000 Kg

Product Description

Brief Introduction

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
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

 
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.


PRESSBOARD STICK    4*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