INSULATING MATERIALs CLASS AND TEMPERATURE CLASS TEMPERATURE Y
90
A 105
E 115
B 130
F 155
H 180
C 7180
SOME INSULATING MATERIALS AND ITS CLASSESPOLYSTER GLASS MICA
POLYSTER TAPE (PGMP) -> FSEMIFLEX TAPE (PGM) -> HEPOXY GLASS
SHEET > F/HNOMEX PAPER -> HKAPTON TAPE -> FTEFLON TAPE
-> HFIBER GLASS TAPE -> BDIOLENE TAPE -> BPERMACEL SELF
FUSIBLE TAPE/SILLICON BASED RUBBER TAPE -> HSIOFLEX TAPE -> F
DIFFERENT TYPES OF VARNISHEDOrganic varnishes and solventless
resins are widely used in the insulation system of electrical
machine for impregration and finishing application impregrating and
finishing agents offers several advantages such as, Increased
mechanical bonding to the winding wire. Improved thermal
conductivity. Protection to the winding against moisture and
chemically corrosive element. Improved thermal conductivity of
insulation.ELAN TAS Beck India offers a wide range of solvent bome
, waterbased varnishes and solventless resins for various
application. DIP OR FLOOD IMPREGRATION VACUUM PRESSURE IMPREGRATION
TRICKLE IMPREGRATION
DIP OR FLOOD IMPREGRATIONIn this method, preheated winding is
dipped in the varnish or resin , preferably with the slots in
vertical direction , after certain time , the winding is removed
from the varnished tank , excess varnish is allowed to drip down.
One limitation is impregrating agent gets coated on unwanted parts
of winding.
VPI MethodPredried winding is placed in an impregrating chamber,
which is then evacuated to very low vacuum . The impregrating agent
is fed in till complete submersion of winding for further
penetration in compact or fine size wire wound units , dry
compressed air or nitrogen gas pressure is applied . After breaking
vacuum , VPI method is generally employed for electrical
machine.
FINISHED VARNISH : Finishes varnishes are used to give an
enveloping coat over the exposed impregrating winding for
additional protection against moisture , chemical fumes and dust.
Finishing varnish or resin is generally done by brushing ,
spraying
TYPES OF VARNISH :
1) ELMO-LUFT-A1 (Air Drying) [with Thiner 205]2) ELMO-THERM-F50
(Heat Drying) [with Thiner 235]3) ELMO-THERM-H71 (Heat Drying)
[with Thiner 218]4) PROVAR (Anti-Track) Varnish5) Valex Red
Insulation Varnish6) Scotch Varnish (electrical insulation
sealer,RED)7) Becktol RED/Becktol GRAY (Finishing coating
varnish)8) Gel Coat Varnish (Resin + Hardner) [with Thiner 218]9)
Graphite with Thiner 22110) ISONEL-3111) ISONEL-51 DIFFERENT TYPES
OF CLEANING AGENT :
1) ORION2) CTC (Carbon Tetra Chloride)3) Letra Clean4) Super
Electro Shape5) Thiner 235 or 205
