| KRYFS LAMINATIONS
PVT.LTD: Manufacturers of Round Torroidal Core &
Rectangular Torroidal Core in Mumbai India. |
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Torroidal strip wound cores form a
virtually air gap free magnetic circuit and
constant cross section and generally offer
magnetic properties very near to that of the raw
material.
Strip wound cores manufactured by
Kryfs Laminations Pvt.Ltd. have found vital
applications in the electrical and electronic
industry. A wide range of such cores are
manufactured at our factory located at Dadra Nagar
Haveli. | |
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We are equipped with the
following machines to manufacture torroidal cores
:-
--> Semi Automatic Core winding
machine.
--> Spot Welding
Transformer.
--> Pit type circular
Electrical Annealing Furnace with inert
atmosphere,
temperature
controller and capacity of 500 kgs per
charge.
--> Test bench to check ampere
Turns/cm at various flux densities.
-->
Spray painting equipment for painting cores with
N.C paint, as per
grade of the
core.
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TYPES OF CORES MANUFACTURED :
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ROUND CORE OR RING CORE :
These cores are most extensively used in
the manufacture of potential and current
transformers auto transformers and reactors
.
Rectangular Cores are widely used in high
tension resin cast
current and potential
transformers.
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PROCESS : |
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SLITTING:
CRGO Electrical
steel comes in the form of wide coils having
widths of 750 mm to 1000 mm. These coils are to be
slit in various widths in steps of 5mm, ranging
from 10 mm to 100 mm.
WINDING:
These slit coils
are wound on semi automatic winding machine as per
the dimensions given by our
customers.
SPOT WELDING:
On
winding the cores to the exact size the start and
finished ends of the core are spot welded on spot
welding machine.
STRESS RELIEF
ANNEALING:
During the winding process,
severe stresses are induced in the gains of the
raw material. Theses stresses are relieved in our
specially designed annealing furnace equipped with
automatic temperature controller, circulating fan
and inert atmosphere. The annealing cycle (at
800°C) is properly controlled to get uniform and
best annealing results.
TESTING:
Since the electrical properties of cores are
very critical, every core is tested on a specially
designed test bench. The ampere turns/cm
(magnetization current) are measured on every core
to ensure that they are within the specified
limits.
PAINTING:
After testing
the 'PASSED' cores are painted with N.C. paint to
prevent the cores from
corrosion.
PACKING: The Electrical
Properties of torroidal cores are very sensitive
to bad handling during transit. We take great care
while packing the cores in wooden boxes with
cushioning material to prevent stresses on the
cores during
dispatch.
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PROPERTIES & RANGE OF CORES
AVAILABLE |
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Cores are normally specified as D x
d x h where D is outside diameter in mm. d is the
inside diameter in mm and h is the strip width in
mm.
Our min inside diameter is 20 mm, and
increases in steps of 5 mm upto 250 mm.
Our
maximum outside diameter D is 360 mm ht (H) is
available from 10 mm to 100 mm steps of 5
mm.
Our guaranteed electrical values are as
follows :
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GRADE
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AT / CM AT
1,5
TESLA & 50 Hz |
WATT LOSS & 1.5 TESLA &
50 Hz
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COLOUR CODE ON PAINTED
CORES |
M6
|
.42 AT / CM
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1.1 |
Grey |
M5
|
.36 AT / CM
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1.97 |
Black |
M4
|
.32
AT / CM
|
.89 |
Green |
Hi
- B
|
.26
AT / CM |
.70 |
Brown | |
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RECTANGULAR CORES are specified by L
x W } X h l x w
Where L is outside length
l is window length
W is outside width
w is window width
h is strip
width.
Rectangular cores can be
manufactured to suit the needs of the customer who
have to specify he dimensions of the rectangular
core.
Electrical properties of rectangular
cores are same as that of round cores.
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