|
No.
|
Class
|
Insulating Materials
|
Uses
|
|
1
|
Y/ O
|
Cotton, silk, paper
vulcanized fibers wood PVC, VIR etc.
|
Always used with
impregnation.
|
|
2
|
A
|
Cotton, silk, paper
press, vulcanized fibers wood etc. Impregnated dielectric oil or varnish also
some type of wire enamel.
|
Leatheroid paper as
slot insulation cotton covered wires impregnated in shellac varnish slot,
wages etc.
|
|
3
|
E
|
Leatheroid paper,
polyvinyl acetyl (PVA) enamel for super enamelled conductors, exoxy resins,
cotton fabrics and paper laminates, mouldings with cellulose fibers.
|
Slot insulation,
winding wires, insulation, insulating moulding with epoxy resin in case of
chokes, C.T. etc.
|
|
4
|
B
|
Glass fiber,
asbestos, mica built-up mica, glass fiber, mica laminates etc.with bounding
substances like shellac, bituminous compounds, epoxy resins.
|
Slot liners, phase
separators etc. Polyster enamel conductors.
|
|
5
|
F
|
Glass fiber,
asbestos, mica, varnished glass, fiber textile, builtup mica etc with bonding
substance like epoxy and silicon alkyl resins.
|
Slot liners,
separators, tapes cords etc. polysterimide and varnished with polyurethane
wires for coils.
|
|
6
|
H
|
Same material as
for cass with suitable binding materials i.e. silicon based glass fabric
flexible micanite with suitable resins of polymide films. Glass fabric taps
or cord with silicon elastomer cover.
|
Slot liners,
insulation taps, Separators, conduction insulation, cord for binding sleeves
etc.
|
|
7
|
C
|
Mica, porcelain,
ceramics, glass, quartz, asbestors, treated asbestors with inorganic binders
such as glass or cement and silicon resins, slate, marble.
|
Same as class H,
also insulating material in ovens etc.
|
