Introducing Dow Epoxy Systems for

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Introducing Dow Epoxy Systems for

• Electrical insulation Transformers,
  switchgears, insulators, etc.
• ??????????????????

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Electrical Insulations ????

• Production for Electrical Insulations ????
• Vacuum casting????
• Casting resin transformers ?????
• Instrument transformers ???????
• Automatic Pressure Gelation ??????
• Insulators ???
• Bushings ????
• Contacting box ???
• Switchgears ????
• Gas insulated switchgear SF6 ??????
• Vacuum Pressure Impregnation ??????
• Motors ??
• Generators ??
• Wires coils ?????

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Vacuum Casting Process
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Products by Vacuum Casting
Distribution Transformers
Instrument Transformers (Voltage Current)
35kV Voltage transformers
35kV current transformers
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APG Process
A Mixing / dispersing machine
B APG equipment
Product Mold
Firstly, resin, hardener and filler were mixed
and dispersed in A, and later inject the
mix into B. After keeping 20 40 mins to
demold and put the prototype into oven to
postcure. The mold will change according
products.
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Products by APG
24kV Switchgear
????????????System C6????????????????????????
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APG made Parts in
??????
SF6???????? (GIS)
??????
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VPI Process
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VPI and the Products
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EE Products Portfolio
Thermal / Current
Indoor
Voltage / Mechanical
Outdoor
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Prefilled Systems

• System P-115, up to 35kV
• Excellent anti-cracking performance high HDT
• Designed for APG
• Filler optimizations
• System P-85, dry transformer, vacuum casting
• EPR849 / EPH849, CY5848 / HY5848, etc.
• Excellent flowability dimension stability
  (toughness)
• Designed for casting

Why prefilled system?
C1 (60 HGH400)
P-115
C7 (60 HGH400)
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Dow Casting Resin System unfilled ???

• System-C2, high flexibility ???
• Cast resin distribution transformers ???????????.
• Epoxy ?? / Anhydride ?? (pre-catalyzed ???).
• Excellent toughness ??????, low viscosity ????
• Cure ?? 4 h _at_80 ºC 4 h _at_120 ºC 8 h _at_140 ºC.

Fig.1 Modulus (G) and mechanical loss (tand)
Fig.2 Dielectric constant (e) and loss factor
(tand)
Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System unfilled ???

• System-C3, mid flexibility ???
• General indoor use, specially used for filament
  winding process. ????????Epoxy ?? / Anhydride ??
  (pre-catalyzed ???).
• Good flexibility and medium Tg ????????????????
• Cure ?? 2 h _at_100 ºC 2 h _at_120 ºC 2 h _at_160 ºC.

Typical values, not to be construed as
specifications ???,?????????
14
Dow Casting Resin System unfilled ???

• System-C5, mid flexibility ???
• General indoor use, specially used for APG
  process. ?????????? Epoxy ?? / Anhydride ??
  (pre-catalyzed ???).
• Good flexibility and medium Tg ????????????????
• APG Cure ?? 0.5 h _at_140 ºC 10 h _at_140 ºC (post
  cure).

Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System unfilled ???

• System-C6, high flexibility?????
• General indoor use, specially used for APG
  process. ?????????? Epoxy ?? / Anhydride
  ?? (pre-catalyzed ???).
• Excellent toughness ??????, low viscosity ??? and
  medium ?? Tg.
• APG Cure ?? 0.5 h _at_140 ºC 10 h _at_140 ºC (post
  cure).

Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System unfilled ???

• System-C9, mid flexibility ???
• General indoor use, specially used for
  transformers . ????????? Epoxy ?? / Anhydride
  ?? / Flexibilizer ??? / Catalyst ???
• Excellent toughness ??????, low viscosity ??? and
  medium ?? Tg.

Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System filled ???

• System-P-115, excellent toughness?????
• General indoor castings and APG.
• Epoxy ?? / Anhydride ?? (pre-filled
  pre-catalyzed ???,????).
• Excellent fractural toughness with minor impact
  on Tg ??????????????Tg
• Cure ?? 4 h _at_100 ºC 2 h _at_120 ºC 2 h _at_160 ºC

Fig.1 Modulus (G) and mechanical loss (tand)
Fig.2 Dielectric constant (e) and loss factor
(tand)
Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System filled ???

• System-S1, outdoor base ????
• Outdoor transformers, switchgears, insulators
  ???????, ???????.
• Epoxy ?? / Anhydride ?? (pre-filled
  pre-catalyzed ???,????).
• Excellent water resistance electrical
  properties. ???????????.
• Cure ???? 2 h _at_100 ºC 2 h _at_120 ºC 2 h _at_140 ºC.

System tested Epoxy / Hardener Mix ratio 100 /
90 parts (wt)
Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System filled ???

• System-S2, ultra high Tg ?????
• High thermal resistance insulators and bushings
  ????????.
• Epoxy (???, 50 ) / Anhydride (pre-catalyzed
  ????).
• Excellent thermal electrical properties
  ???????????.
• Cure ???? 2 h _at_100 ºC 2 h _at_120 ºC 4 h _at_160 ºC

Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System -unfilled

• System-S3, latent ???, ???
• VPI applications, like coils, motors, etc ???,
  ????,?????.
• Epoxy / Anhydride / Accelerator ?? / ??? / ???
• Very long pot life fast cure during reaction
  ?????????????.
• Cure ???? 4 h _at_100 ºC 2 h _at_120 ºC 2 h _at_160 ºC

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Dow Casting Resin System filled ???

• System-S4, flame retardant ???
• Indoor flame retardant casting ?????????????
• Epoxy ?? / Anhydride ?? (pre-filled
  pre-catalyzed ???,????).
• ???? UL94 V-0 (6.4 mm).
• Cure ???? 2 h _at_100 ºC 2 h _at_120 ºC 2 h _at_160 ºC

Typical values, not to be construed as
specifications ???,?????????
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Ambient Cure Casting System filled ???

• System-S5, ambient cure FR ?????????
• Ambient castings for capacitors, filters and
  transformer refinishing ????, ????.
• Epoxy (???, 50 ) / Amine ?????
• ???? UL94 V-0 (6.4 mm).
• Cure ???? 24 h _at_25 ºC 2 h _at_70 ºC ( 4 h _at_120 ºC
  if needed)

System tested Epoxy / Hardener Mix ratio 100 /
11 parts (wt)
Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System filled ???

• System-S6, outdoor base ????
• General outdoor use, specially used for filament
  winding process. ????????
• Epoxy ?? / Anhydride ?? (pre-filled
  pre-catalyzed ???,????).
• Excellent water resistance electrical
  properties. ???????????.
• Cure ???? 2 h _at_100 ºC 2 h _at_120 ºC 2 h _at_140 ºC.

Typical values, not to be construed as
specifications ???,?????????
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Dow Casting Resin System filled ???

• System-S7, outdoor base ??????
• General outdoor use, specially used for filament
  winding process. ???????.
• Epoxy ?? / Anhydride ?? (pre-filled
  pre-catalyzed ???,????).
• Excellent water resistance electrical
  properties. ???????????.
• Cure ???? 2 h _at_100 ºC 2 h _at_120 ºC 2 h _at_160 ºC
  1 h _at_180 ºC.

Typical values, not to be construed as
specifications ???,?????????
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Dow Epoxy Portfolio

• Dow Epoxy product finder
• http//epoxy.dow.com/epoxy
• DOW Epoxy Resins for Electrical Castings,
  Potting and Encapsulation, and Tooling
  Applications
• http//epoxy.dow.com/epoxy/products/app/ec.htm
• Liquid Epoxy Resins
• Bisphenol-A Epoxy Resins
• Bisphenol-F Epoxy Resins
• Bisphenol-A/F Epoxy Resins
• Modified Bisphenol-A Epoxy Resins
• Modified Bisphenol-A/F Epoxy Resins
• Epoxy Solutions and Solid Solutions
• Epoxy Novolac Resins
• Glycol Epoxy Resins
• Flexible Epoxy Resins
• Epoxy Curing Agents/Hardeners
• Aliphatic and Polyamine