INTRODUCTION
1.0
The machine is specially designed for industrial and
agricultural welding. It is only powered from A.C power source for all welding.
The unit is
designed to operate on single phase 240v A.C. supply and it is mainly a
transformer unit. It is capable of operating from 25 Amps socket for most of
its output range. The current drawn form the mains supply may exceed the 25
Amps, hence the unit must be provided with 30A switch fuse input as those
provided for electric cookers, heaters etc. this connection must be made to the
dead side of a 30A circuit. The circuit should not be shared by any other
appliance.
The unit consists of the following
main components single phase transformer (with tap changing secondary). The
transformer is a step-down transformer with different tapping at H, M and L;
welding tung cables.
The transformer is a
conventional-cooled, single phase transformer which has shell type of
lamination core and insulated windings of copper cols. In addition, the
windings are given double insulation with the use of varnish solution which
helps to prevent short-circuiting in the windings.
With the
help of Angle iron and lamination core, the core loss, iron loss in the machine
is reduced to minimum. They also help to reduce humming in the machine. Hence,
efficiency of the machine is greatly improved.
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