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Cast
Resin Transformers
TECHNICAL
FEATURES :
Manufacturing standards:
The transformers are built in accordance
with IS 11171 and IEC 726 standards.
Core
:
The core is built of cold rolled oriented
grain steel with low specific losses, insulated
on both sides by a thin inorganic coating
(Carlyte). The sheets composing the core
are cut at 45 degrees. Uniform pressing,
stiffnes and solidity of the columns assure
a low noise level.
High voltage windings :
The high voltage windings are made of
electrolytic COPPER SUPER ENAMELLED F/H
CLASS conductors (wire or foil strip depending
upon power and voltage requirements).
It is possible to produce Aluminium windings.
The windings are inglobed under vacuum
in class F/H epoxidic resin depending
on requirement. The accurancy of execution
of these processes allows the obtainement
of windings free from partial discharges.
Low
voltage windings :
The low voltage windings are made of strip
or foil (copper or alluminium conductor
depending upon power and voltage requirements).
Class H insulating material is used.
Standard
Accessories :
- Rating
and diagram plate
- Earthing
terminal
- Skid
under base or truck with bidirectional
wheels
- Primary
Terminal
- Secondary
terminal lifting lugs.
- Enclosure
with IP 21,23 or other protection class
- Temperature
monitoring unit with display.
Optional
Accessories :
- Over
current relay
- forced
ventilation system.
Test:
All transformers are singly tested with
routine test, according to standard IEC
726/ IS 2026 / IS 11171. Upon request
the following type test can be carried
out on customers request :
# Temperature rise test
# Full wave impulse test
Special
test: short circuit test.
Technical Data :
| Standard
Applicable : |
IS
2026, IS 11171, IEC 726 |
| TYPE
: |
Open
/ Enclosed |
| Temperature
Class : |
155/140/120
°C |
| Insulation
class : |
H
/ F /B |
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