INTRODUCTION
.
This manual describes the equipment, installation, operation, safety, and
maintenance of WARPP make DC arc welding rectifiers. Tease welding
equipments are designed for manual metal arc and manual TIG welding
application in heavy duty fabrication. Simple design and rugged construction
makes it most ideal for maintenance free operation. This equipment is mounted
on four wheel chassis with two fixed wheels in the front and two revolving wheels
at the back side.
This equipment consists of a three phase step down transformer along with
three phase magnetic amplifier (Transductor) and three phase silicon diode
rectifier. The welding current is varied by varying the current in the DC coils of
the transductor. This current is obtained by a control transformer and an auto
transformer along with a single phase silicon diode rectifier. The transformer
steps down 415 Volts input supply to a voltage around 100 volts which is fed to
the rectifier via the autotransformer. The output of the rectifier is given to the DC
coils of the transductor.By varying the autotransformer setting the current fed to
the DC coils of the transducor varies and hence the actual welding current varies
accordingly. The autotransformer is calibrated for exact output welding current.
Main transformer is provided with primary tapping to work on 380/415/440 volts
input supply. All the components of the equipment is cooled by an single phase
fan. A simple change over of output cables allows the operator to use either
straight OR reverse polarity.
-1-
