Based
on epoxy resin and fibreglass reinforcement, various
grades of laminates are manufactured to NEMA G-10 and
G-11 standards. Also, with the stringent requirement
of high tracking resistance (KA3C) and high di-electric
strength in view, special type laminates are offered
for MV Switchgear applications. Similarly, fire-retardant
grade laminates are offered for specific applications.
These are available in standard
sizes, in the thickness range of 0.4 mm - 60 mm & above.
Of course, extra - long Sheets / strips of more than
2400 mm, without joints, are also offered for coil
support in Generators. A wide range of Laminates made
out of fibreglass CSM and woven fabric bonded with
Epoxy or Polyester resins are offered for a variety
of applications. These are made to EP2 / EP3 and GPO1/
GPO2 / GPO3 as per Indian standard IS1O192-1982
|
|
| Material
Tested: |
Glass
epoxy sheet EP 3 Grade / Nima
G10 grade |
| Type
of Test: |
1)
Cross breaking strength
2) Compressive Strength
3) Tensile Strength
4) Shear Strength
5) Water Absorption
6) Temperature limit
|
| Test
method: |
IS:
10192-82, Ep3 Grade, Neema L1 Grade |
|
No.
|
Item
|
Result
Obtained
|
Result
Requd.
|
|
1
|
Compressive
Strength (N/mm²)
|
478.96
|
Minimum
Requirement for 5-12 mm thick sample 400 |
|
2
|
Cross
breaking Strength (N/mm²)
|
359.15
|
Minium
Requirement 350
|
|
3
|
Tensile
Strength (N/mm²)
|
372.51
|
Minimum
Requirement 280
|
|
4
|
Shear
Strength (N/mm²)
|
130
|
Minimum
Requirement 100
|
|
5
|
Water
Absorption
|
0.02%
|
0.75%
|
|
6
|
Temperature
Limit
|
160°
|
As
per requirement
|
|
7
|
Comparatrive
Tracking index
|
500
Volts
|
Requirement
250 Volts
|
|
8
|
Breakdown
Volage (4mm Sheet) (Flat Wise)
|
56
KV
|
14
KV / mm
|
|
9
|
Dissipation
Factor at 500V
|
0.02
|
0.04
|
|
10
|
Insulation
Resistance
|
80000
mohms
|
10000
mohms
|
|
|
| Characteristics & Applications: |
|
|
1.
As per NEMA Grade G-10, mechanical, electrical
and electronic applications; high strength under moderate
temperature; good electrical properties under high
humidity.
2.
As per NEMA Grade FR-4, with high mechnical
strength at room temperature, good electrical properties
under dry and humidity conditions, flame retardant,
suitable for mechanicl, electrical and electrical and
electronical applications.
3.
As per NEMA Grade G-11, with high strength
at room temperature and 150¡æ,
good electrical properties under dry and humidity conditions,
used for making insulating parts in electrical, electronical
and other industries.
|
Fiberglass
Pultruded Products
