Automation Heavy Electricals Pvt. Ltd. - a New Delhi based co. is well set in manufacturing and supply of spare coils for ht power and distribution transformers for voltage class 132 kV, 66 kV, 33 kV, 22 kV, 11 kV, 6.6 kV, 3.3 kV and 0.433 kV.

Supply of HV Coils for Transformers:
HT coils in cross-over and disc type for HV side are manufactured as per your sample or drawings. In case you are not confident about the winding data of coils please let us know and we will get winding data for your old transformer through our most advanced power transformer winding data design software. Of course, certain basic specifications of transformer are also required.

Generally, we need ID and OD of the coil with radial and axial width of the coil. Second the type of coil conductor - round or flat with cross section & strip width and height is required to manufacture a transformer coil.

We can manufacture coils in aluminium and copper. Due attention is given to coils while providing turn to turn and layer to layer insulation depending upon the voltage class.

Supply of LV Coils for transformers:
LT coils in spiral, helical type and bothe in single layer and double layer are manufactured and supplied as per your sample or drawings. Here we need either the old coil dimensions or the core dia, limb centre and window height to help you out the size of coil if you do not have a sample with you. Actual data for LV coil is calculated through power transformer winding data design software. Of course, certain basic specifications of transformer are also required. Due consideration is given to conductor "transposition".

Axial Force Control:
To control the axial forces in the coils due "thinning effect" is taken into account while manufacturing the LV coils. Proper spacing in between the turns and turns just opposite to tapped coils.

Off Load Or OLTC Tapped Coils:
Tapping coils for HV side are manufactured either in the same HV limb or a separate tapping limb is made (generally in case of 132 kV transformers). To balance the ampere-turn and the axial forces the tapped coils are either divided in two parts and placed separately or a separate tapping limb is made.

Split HV:
For exceptionally high cross-section HV conductor area, the HV coils are split into two parts and paralleling of coils is done.

Packaging & Transportation:
The coils are packed to protect them from transit vibrations and placed in a MS tank filled with fresh transformer oil.

Order Now:
So if you have any requirement of coils for your power and distribution transformer please get in touch at - automation@vsnl.com