Power up to 10 MVA -33
kV. Distribution up to 5 MVA – 33 kV, Furnace up to 5 MVA – 33
kV, Rectifier up to 10 KA DC – 33 kV, Reactor up to 2 MVA – 33
kV , Earthing up to 2 MVA – 33 kV, Converter Duty up to 5 MVA –
33 kV, Dry (VPI) up to 2 MVA – 11 kV. – with OLTC also.
Station & Multi-winding
to suit specific needs & L.T. Transformers for generating
Stations.
Upto 10 MVA ,3 Phase , Upto 33Kv , ONAN/ONAF/OFAF /OFWF Cooling
For Power transformers, the short circuit withstand capability
is of prime importance. This is achieved by us through the
adoption of a unique clamping arrangement of the windings and
accurately determined pre-stress.
It is characterized by inner and outer low voltage winding
sections and a high voltage winding section disposed there
between. The low voltage windings are comprised of a plurality
of pancake coils, and the high voltage winding are comprised of
a plurality of conductor strands spirally wound for a plurality
of coil layers. The low and high voltage winding sections are
laterally spaced with the low voltage windings disposed in
side-by-side positions and adjacent to the high voltage
windings.
Industrial, Substation &
Distribution Transformer up to 10 MVA, up to 33kV, ONAN
A poly phase transformer design is presented in which
transformer output pores are accurately constructed in both
voltage magnitude and relative phase angle. The design
incorporates both main and auxiliary transformers that are used
in unison to produce the accurately constructed phases. The main
transformer permits rough phase adjustment to be made with the
auxiliary transformer permitting phase fine tuning. Such a
design is particularly suitable in transformer approaches that
require output phases that are of a number not evenly divisible
by three.e cleaned and each device undergoes appropriate
testing.
Arc,Submerged Arc, Ladle
, Induction , upto 10 MVA upto 33 kV. ONAN/OFWF Cooling.
A high current furnace transformer is provided having the
low-voltage windings arranged in a closed delta configuration
within the transformer enclosure. Bus bar terminals are mounted
exterior to the enclosure for providing electrical connection
with the low-voltage windings
Six or Twelve Pulse with
IPT (Double bridge construction), Up to 10 KA DC, Up to 33kV,
ONAN/OFWF cooling.
A rectifier transformer circuit permitting six-phase double-wye
operation with 120.degree. conduction, (without the use of an
inter phase transformer), and providing any predetermined degree
of phase shift. The transformer comprises a zigzag wye primary
winding and a six-phase star secondary winding. By choosing the
proper ratio for the turns of the zig and zag portions of the
primary winding, any degree of phase shift can be obtained. The
rectifier transformer is ideally suited for multiple-phase
installations wherein several rectifier transformers are used,
each providing a different amount of phase shift, without the
use of separate phase-shift transformers.
Air cored series & Shunt
Reactor, Upto 10 MVA , Upto 33Kv, ONAN / AN
A variable transformer, reactor having a core combining at least
two complete core elements with a common yoke; primary winding
divided into two independently fed sets of phase coils wound in
opposite direction, arranged on symmetrical legs of core
elements and separated by the common yoke; secondary winding
with each phase coil divided into two wound in opposite
direction portions carried by symmetrical core legs, adjacent to
the primary coils and separated by common yoke. The secondary
short-circuited reactor winding is reduced to at least one close
loop member with loop portions separated by the common yoke. The
single, poly phase apparatus has at least one primary coil per
set that includes a controllable device in circuit relation
therewith to enable control of one primary coil relative to the
other, either in current magnitude or in current phase shift.
The controllable device being either a silicon control rectifier
or transistor
Earthing up to 2 MVA –
33 kV - Earthing transformers are used to create a neutral point
in a three-phase system, which provides possibility for neutral
earthing. The earthing can be through an arc-suppression
reactor, a neutral earthing reactor or resistor or directly.
Earthing transformers are usually oil immersed and may be
installed outdoor. In cases where a separate reactor is
connected between the transformer neutral and earth, the reactor
and the transformer can be incorporated in the same tank.