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LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation

LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation

LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation
LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation
Categories Electrical Epoxy Resin
Brand Name: WENYOU
Model Number: LE-9516/LH-9516
Certification: REACH/RoHS/UL/SGS/IOS
Place of Origin: China
MOQ: 20KG
Price: 2.3-2.85USD/KG
Payment Terms: L/C,T/T
Supply Ability: 50000BARELS/MONTH
Delivery Time: within 10 days
Packaging Details: iron barrels/drums
Viscosity: 200-500
Process: APG & Vacuum Casting
Keywords: electric epoxy resin
Thermal Decomposition: ＞320°C
Adhesion Strength: Strong
Usage: Electrical insulation
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Company Info.
Shanghai Wenyou Industry Co., Ltd.
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LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation

Formulation

9516 Outdoor Injection Electrical Insulation Epoxy Resin For Electric Current / Voltage Transformer 0

Epoxy resin

  • LE-9516

100pbw

Hardener

LH-9516

100pbw

Filler

Silica

350-400pbw

Color paste

LC-

3pbw

Performance

A two component saturated epoxy resin system without premixed filler, liquid at room temperature.
It is suitable for both APG injection process and vacuum casting process.
Excellent UV resistance, excellent thermal and thermal shock resistance, excellent environmental resistance and excellent electromechanical performance.
Application
Outdoor high-voltage electrical insulation parts such as: insulators, transformers and other insulation products.
Physical and chemical indicators

Resin LE-9516 is a modified saturated Curing agent LH-9516 is a modified weathering

epoxy resin system anhydride curing agent.

PropertyUnitStandardPropertyUnitStandard
AppearanceVisualTransparent-yellow liquidAppearanceVisualTransparent-yellow liquid
Epoxy valueEq/kg4.0-4.5viscosity at 25℃mPa.s150-400
viscosity at 25℃mPa.s500- 1500Density at 25℃g/cm31.17- 1.24
Density at 25℃g/cm31.16- 1.20VPPaAbout 0.5
VP at 25℃Pa<0.01Flash point℃About 140
Flash point℃About 135

Process

Epoxy resin LE-9516, curing agent LH-9516 and a certain amount of filler can be mixed according to the following curing process after fully mixing under vacuum conditions:

Processing parametersAutomatic Pressure GelationVacuum casting
Epoxy Resin/Hardener mixing temperature40℃/1-2h50-60℃/1- 1.5h
Feeding methodPressure(0.5-5bar)Vacuum (casting pot)
Mold temperature130-150℃105℃/4-6h
Gelation time10-50mins80℃/4h+100℃/2h+120℃/2h
Post-curing130-140℃×6-10h130-140℃×6-10h

9516 Outdoor Injection Electrical Insulation Epoxy Resin For Electric Current / Voltage Transformer 19516 Outdoor Injection Electrical Insulation Epoxy Resin For Electric Current / Voltage Transformer 2

Gel time

LE-9516:LH-9516=100:100

TemperatureGel time
at 120℃20-40mins
at 140℃9-18mins
at 160℃4-8mins

Mechanical andphysical properties

Test system: Resin LE- 9516 / curing agent LH-9516 / silica flour=100/100/400 Curing conditions: 120 ° C × 4hours +140 ° C × 8hours

Note: The following performance data are measured according to the national standard and are for user reference only.

The specific application data should be determined according to the actual conditions of the user.

PropertiesTypical resultsPropertiesTypical results
Tg(DSC)60-80℃Thermal decomposition temperature>320℃
tensile strength60-80N/ mm2

Water absorption rate (23 ° C × 10

days)

0.10-0.20 %by wt.
Flexural strength100- 130N/ mm2

Water absorption rate (100 ° C × 60

minutes)

0.08-0.15 %by wt.
Compressive strength140- 190N/ mm2Surface resistivity1014 Ω
Impact strength8- 16kJ/ m2Volume resistivity1015 Ω.cm
Curing shrinkage0.8- 1.0%Dielectric strength31 kv/mm
Flame resistance (4mm)HB levelDielectric loss0.02
Thermal conductivity0.8-0.9W/mk

Key Features & Advantages:

  • Outdoor Durability: Excellent UV, thermal shock, and weather resistance for long-term reliability.
  • High Dielectric Strength: 31kV/mm insulation ensures safe operation in high-voltage applications.
  • Thermal Stability: Withstands temperatures up to 320°C (thermal decomposition point).
  • Low Viscosity: Optimized flow (150–400 mPa·s at 25°C) for thorough component coverage.
  • Fast Curing: Gel times as short as 4–8 minutes at 160°C for efficient production cycles.

Applications:

  • Encapsulation of outdoor CT/VT coils
  • Insulators for high-voltage transformers
  • APG injection-molded electrical components
  • Protective coatings for substation equipment

FAQ Section:
Q: What curing methods are supported?
A: Compatible with APG injection (130–150°C) and vacuum casting (105–120°C).

Q: Is this resin suitable for indoor use?
A: Yes, but it’s specifically optimized for outdoor durability (UV/weather resistance).

Q: What’s the minimum order quantity?
A: 10KG with flexible drum packaging (20–1200KG options).

Q: Are custom formulations available?
A: Yes, technical parameters can be adjusted for specialized requirements.

Product Tags:

Electrical Insulation Epoxy Resin

  

LH-9516 Transformer Epoxy Resin

  

Outdoor CT Transformer Epoxy Resin

  
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LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation

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