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STACKED Transformer CORE: (Also known in the industry as Transformer Laminations due to the grey coloured E carlite insulation coating that Grain Oriented Steel
has)
KRYFS manufactures the following products :
We manufacture Transformer Core Laminations from Cold Rolled Grain Oriented (CRGO) steel in grades M2, M3, M4, M5, M6 and also the Hi-B CRGO grades of ZH, ZDKH, ZDMH, ORSI-H, TCH-O, TCH-1 etc. For more technical details on the various grades of CRGO steel. Click here
KRYFS manufacturers Stacked Transformer Core at both its plant at Palghar (Maharashtra) by the manual method of cutting and fabrication and
Kherdi (Dadra Nagar Haveli) where it has
4 GEORG Lines, and annealing furnace in addition to the manual method of cutting and from where all finished products are currently dispatched.
KRYFS can process Transformer Core upto the maximum width possible in CRGO that is 1000 mm.
The manual method of processing is the conventional method of manufacturing Transformer Core in India. It is used mainly for distribution
Transformers at KRYFS. However, even in processing by manual method, strict internal tolerances are maintained while fabrication. Also every Lamination is
deburred if required (to improve stacking factor) and finally annealed in the KRYFS electrical roller hearth fast cool furnace as recommended by the manufacturing mills.
BUILT Transformer CORE:
KRYFS in 2006 had the capability to produce built Transformer Cores for supply to customer as a built up unit upto 1500 KVA due to the constraints in transportation of larger cores on the roads in India.
On customer's request and specification we can also provide fully assembled stacked core, with no load losses tested and appropriately packed and ready for insertion of LV and HV coils. We are the only Transformer Core manufacturer in India to provide this facility.
For more information on various grades and properties of CRGO
Click Here >>
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Our Internal Standards &
Normal
Tolerances
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ATTRIBUTE
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TOLERANCE |
| Length |
(upto 315 mm) +0/-0.4 mm
(from
315 mm to 1000 mm) +0/-0.6 mm
(from 1000 mm
to 2000 mm) +0/-1 mm
(from 2000 mm to 4000
mm) +0/-1.6 mm
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| Width |
(upto 150 mm) +0/-0.25 mm
(from 150 mm to 500 mm) +0/-0.3 mm
(more
than 500 mm) +0/-0.5 mm |
| Angle |
+/-5 minutes
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| Edge Camber |
Max. 1.5 mm in 2000 mm length
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| Burr |
25 Microns Max. or 10% of
thickness, whichever is lesser
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| Stacking factor |
96% (for M-4 & M-5)
96.5%
(for M-6) |
| Thickness |
+/-0.03 mm
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| Insulation resistivity
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Min. 10 Ohm/sq. cm. as per
Franklin method
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TORROIDAL
CORE:
Torroidal Cores are round or rectangular shaped cores manufactured from CRGO Steel to be used in current and potential Transformers (CTs and PTs ). Our Torroidal Cores are manufactured from the very best CRGO steel and are annealed in a pit furnace to 820°C for a full cycle of 14 to 15 hours. The critical guaranteed values of our Torroidal cores are:
GRADE
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Guaranteed No load current ( at
1.5 Tesla 50 H2 ) |
Hi - B grades
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0.28 AT / cm
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M4
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0.32 AT / cm
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M5
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0.36 AT / cm
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M6
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0.42 AT / cm
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GRADE
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COLOUR
(if required)
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Hi - B grades
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Brown
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M4
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Green
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M5
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Black
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M6
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Grey
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AT / cm = Ampere Turns per centimetre.
100% of our cores are tested before dispatch so that our customers get only those cores which are better than the above guaranteed specs. We also paint the cores so that the colour indicate the grade of the core. The colour coding is as follows.
For more information on this product click here>> Torroidal Core
CRGO STRIPS & SLIT COILS
We also produce CRGO strips and coils slit and manufactured to the customers specification and design. These are supplied in all available grades of CRGO steel.
OTHER PRODUCTS
We also manufacture a range of material handling equipment like slings, lashings and harnesses. For more information on our SLINGSET range of slings and lashings, visit us at
www.slingset.com
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