Manufacturing Process

SLITTING
Select the proper grade coil and slit the same as per slitting plan.

Load the Appropriate Coil and cut the laminations as per the work instructions given,
:: Company Video

MITRING
A) Do the mitring (cutting at 45 degrees angle) operation as per customer's drawing and maintaining grain direction along length.

B) Complete the V notching and holing operations as per customer's drawing.



C) Inspect lamination at every stage as per internal Tolerance Chart or tolerances specified by customer.

D) Anneal lamination in Roller Health annealing furnace.


E) Check and record losses after annealing.


F) Weighment, Final Inspection and Packing of Lamination on wooden pallets with Lamination covered with poly tarred Hessian and secured with steel strap


G) Attach copy of packing List on every pallet.

1. Selecting the proper width and grade of CGRO coils.
2. Winding of Toroidal Core as per customers requirements and tolerance for ID, OD and HT.
3. Inspect wound core for dimensions.
4. Arrange cores in SS basket and load the same in annealing furnace.
5. Carry out the annealing cycle as per work instruction laid down.
6. After annealing is done every core is tested for electrical AT/cm value as specified by customer or as per our internal standards.
7. All readings of electrical values noted in register and proper stickers with core identification no. are stuck on every toroidal core.
8. All cores packed in wooden boxes with cushioning material and boxes are securely strapped with steel straps.
9. Packing list is fixed on every box

1. Ensure all core frame parts and insulation boards are available.
2. Assemble core frame as per customers drawing. Ensure proper tightening of tie rods, cross bolts etc.
3. Wind dummy turns around all three limbs and connect the wire for N.L.L testing.
4. Connect leads from power source to core connection and also connect Yokogawa leads to transformer turns.
5. Gradually increase voltage of power source to 250 volts (3 watt meter method).
6. Observe N.L.L. of each phase and also note the current readings. Note frequency.
7. Transfer data to P.C to get a comprehensive report.