Utmost care is taken while
manufacturing and assembling every components of a Transformer. The
main process lines of a transformer are:
Core: The core is constructed from lamination of imported
cold rolled, grain oriented, low loss electrical sheet steel. The
cores are assembled in jigs prior to tapping and clamping in a
manner that reduces vibration noise to a minimum individual stamping
which are coated on both sides with insulating varnish which is both
oil and heat resistant and the complete core is connected to the
clamp to ensure that it is effectively earthed. The core legs ate
surely bound with heavy duty insulating tape and the yokes are
firmly clamped between folded steel channels. Top & bottom
clamps are secured to each other by means of tie rod, which serves
the dual purpose of securing the winding in place and of
transferring the load from the bottom to the top clamps when the
core and windings are lifted. This prevents any tensile stress being
setup in the core legs, which could adversely affects the iron
losses.
Winding: Transformer winding are designed to meet three
fundamental requirements: mechanical, thermal and are wound
concentrically. Both H.V. & L.V. windings are would with
adequate brazing and securing tapes in order to achieve a strong and
self-supporting structure.
Inter Layer ducts are provided to ensure low temperature gradient
between windings and oil and thus, any hot spot temperature is kept
to a minimum. This ensures is minimized and high life expectancy is
achieved.
Winding Connections: Tapping and phase lead are run in
paper-covered conductors, the phase leads being separate from the
tapping leads by adequate barriers. These tubes are rigidly brazed
to ensure that required clearance from coil to tank is being
maintained.
LV Leads, larger in cross-section, are generally sufficient robust,
but where necessary, supports are provided.
INSULATION AND IMPREGNATION
The principal component of insulation is insulating pre-compressed
pressboard. The component like ring ducts dovetailed spacer; blocks
etc. are put under compressing along with the coil assembly for
preshrinking. The slight recovery in dimension after the
preshrinking is compensated by providing additional insulation. This
reduced the probability if coils getting loose during operation and
also minimize the failure due to short circuit forces.
SHORT CIRCUIT CAPABILITY
In the order to prevent deformation under short-circuit forces;
solid insulation end block and ring are used. Winding are compressed
under top and bottom clamping members with the help of tie rods. The
axial end thrust under fault conditions is minimized by the suitable
balance of the ampere-turns over the length of windings. In case of
bigger transformer, the HV tapping leads are taken out from two
positions to balance the short-circuit forces in a much better way.
TANK CONSTRUCTION
All tank are made from mild steel sheet of adequate thickness with
corrugated wall panel type radiators of pressed steel fin/cooling
tube for heat dissipation.
All tanks are checked by magnaflux, ultraviolet ray die penetrating
system to ensure that there is absolutely no leakage from any part
of the tank.
QUALITY FINISH THROUGH USE OF SHOTBLASTING TECHNOLOGY
Tanks are shot blasted to remove mill and welding scale and then a
primer coat is immediately applied to the exterior to eliminate rust
formation.
After priming, all tanks receive a coat of intermediate paint and
after pressure testing; they receive a final coat of high gloss
paint applied by spray. This ensures high coverage helping to combat
corrosion in inaccessible place.
Manual Transformer
INTRODUCTION :
Most industries are facing the problems of low voltage,
economically and the minimum distortion. The solution is MANUAL
TRANSFORMER for an uninterrupted of the voltage to run industries
and these Transformers are available in wide capacities to meet all
domestic and industrial requirements
CONSTRUCTION :
These units are of robust construction and precisions built the
units are made in natural oil immersed & air cooled
construction. Oil immersed construction offers best protection to
the transformer unit in this regard and therefore increase the life
enormously. The tanks are provided with pipes & finces for
cooling have pleasant gray enamel finish and mounted on wheels for
mobile operation.
CURRENT CONTROL :
A 8 Step change link incorporate with transformer provide a choice
of 8 steps to balance the voltage control. The tap change link
enclosed to the upper side of the transformer.
METER PANEL :
A moving three iron voltmeter along with indication lamps are
provided on a panel indicating the output voltage and input voltage
current. The panel is mounted on one of the tanks to enable it with
easy manipulation.
CVT Transformer
VIRDI CVT are produced by using state of art
Ferow resonant technology. The product is highly economical &
reliable. It gives you instantaneous voltage regulation, no
transient, no spikes, sine wave, output, noiseless operation and
high isolation between output & Input.
Recommended for Computers, Telex, Fax, Bio-medical Equipments, and
Colors Photography Lab, Telecom Equipments etc.
No semi conductor or moving parts used, short term over load
capacity
Instantaneous short circuit and over load protection.
Excellent spike, surge suppression.
Very fast correction speed.
PRECAUTIONS:
Avoid using CVT for high inductive load or with loads requiring
heavy stating current. Keep magnetic strange & display devices
i.e. diskettes, spools, monitors away from CVT. Switch on the CVT
before switching the attached peripherals before switching off CVT.
Do not use CVT generators where frequency variations are outside the
specified range..
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