Wally Electric (Xiamen) Co., Ltd.

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HV Tube/Pipe Insulators

HV Tube/Pipe Insulators

There are two types of filament winding process in Wally Electric, one is wet winding, the other is dry winding with VPI(Vacuum Pressure Impregnation) process.
Wally Electric mainly focuses on friber reinforced epoxy resin vacuum casted composite functional components (insulators) and parts as below:

● 72.5~1100kV GIS Operating rods, Supporting insulators, Chamber insulators and other composite insulators. Tube or pipes produced by dry filament (or fabric) winding are bonded with metal armatures (inserts) and being used as operation rods, supporting insulators or chamber insulators for high voltage GIS, LTB, GCB, DTB...etc, application.;

● Silicon rubber coated wet winding tube used as hollow composite insulators, dry bushings, surge arrestors, capacitors for medium and high voltage power transformation, transmission, and distribution.

● For GIS capacitors shell and other high voltage (72.5~1100kV) insulators and functional components application

 典型材料特性 Typical Material Performance

Main Reinforcing Material

Aramid-PET
Hybrid Fabric-1

Aramid-PET
Hybrid Fabric-2

Local E-glass
Fabric

Local Pure
PET Fabric

Local
 Pure Aramid Fabric

CN Standard

Equal to

(Process: Dry fabric winding)

GB/T 5132.2-2009

IEC 61212-2:2006

Physical Properties

Fiber Content, by weight [w-%]

--

--

55~57

--

--

GB/T 2577-2005
(GB/T2576-2005 ?)

ISO 1172:1996
(ISO 308:1994)

Density [g/ccm]

1.30~1.33

1.31~1.34

1.70~1.75

1.30~1.33

1.31~1.34

GB/T 1033.1-2008

ISO 1183-1:2004,IDT

Water Absorption [%]

RT

0.13~0.16

0.12~0.15

0.10~0.13

0.11~0.14

0.16~0.19

GB/T  1034-2008

ISO62:2008, IDT

100°C

0.15~0.18

0.14~0.17

0.10~0.13

0.12~0.15

0.16~0.21

Tg Temperature [°C]

≥120

≥120

≥120

≥120

≥120

GBT 19466.2-2004

ISO 11357-2:1999

Mechanical Properties

E-Modulus axial [MPa]

≥23000

≥45000

≥25000

≥4500

≥24000

GB/T 1447-2005

ISO 527-4:1997

Tensile Strength, axial, FPF [MPa]

≥500

≥700

≥250

≥120

≥550

Tensile Strength, radial, FPF [MPa]

≥100

≥50

≥150

≥100

≥250

Bending Strength, axial, FPF [MPa]

≥300

≥450

≥400

≥100

≥300

GB/T 9341-2008

ISO 178:2001,IDT

Electrical Properties

Dielectrical Strength, axial, 50 Hz, 10 mm section [kV/mm]

  ≥10

≥10

≥10

≥10

≥10

GB/T 1408.1-2006

IEC 60243-1:1998,IDT

Dielectrical Strength, radial, 50 Hz, 3 mm Ring Section [kV/mm]

≥22

≥20

≥20

≥22

≥18

Surface resistance (1000V,20-25℃)Ω

≥1×1014

≥3×1015

≥4.5×1015

≥7.5×1015

≥6×1014

GBT 1410-2006

 IEC 60093-1980,IDT

Volume resistance(ρ) (1000V,20-25℃)Ωcm

≥5.5×1015

≥2×1017

≥1.5×1017

≥3.5×1016

≥1×1016

Dielectrical Loss Factor Tanδ [%]

0.61~0.65

0.65~0.70

0.31~0.35

0.35~0.40

0.75~0.80

GB/T 1409-2006

IEC 60250:1969,MOD

Relative Permittivity

3.4-3.6

3.4-3.7

4.0 - 4.5

3.2 - 3.3

3.1~3.5


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Any questions please contact:Sale@wally-electric.com for reply.
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