Mounting block is made from forging superior quality brass rods. With the help of connecting stud It is mounted on the phase boards which are of high quality insulating materials. The total number of mounting blocks in an OLTC depends upon the rating of the OLTC.
Fixed contact are made from Electrolytic grade copper bars. Copper Tungsten is tipped to fixed contact. This
is the main contact point
Moving contact are made from Electrolytic grade copper bars. Copper Tungsten is tipped to moving contact. Moving Contact is used to establish a contact between Fixed Contact and Collector Ring.
Collector ring is made of brass in 33KV OLTC, for 66 KV we use Copper Ring. It is main contact on which
the moving contact rotates as and when the position is changed. There are 3 Rings in each OLTC.
L-connector assembly consist of 2 L-Copper Piece 2 flexible copper V-Bend strip. L-Connectors are made from L Shaped Copper Bars and V-Bend Strip are made from plain copper strips. These are used to connect the OLTC to the Transformer with the help of epoxy board.