Stud welding unit N1500i
As of: Aug 12.2021
Manual part number: BE 1221
5
Nelson Bolzenschweiß-Technik GmbH & Co. KG, Flurstraße 7-19, 58285 Gevelsberg
1.2 Unit Description
The Nelweld N1500i is a mobile welding unit, which in connection with a manual-
loading gun serves to weld metallic studs onto workpiece surfaces that are suited for
welding.
Commercially available studs can be welded both according to the drawn-arc
and the short-cycle welding method with the Nelweld N1500i. The variation in
method must be selected with the function code.
The Nelweld N1500i works on the basis of a compact inverter power source and
with extremely short weld times supplies constant weld currents up to 1500A.
In this connection, the rectified mains voltage is transformed into high frequency
voltage by means of an inverter. The inverted voltage is transmitted by a high-
frequency transformer and rectified on the out- put side.
As a consequence of the high control rate of the Nelweld N1500i the reproducibility of
the welds is increased, and the quality of the welds clearly improved.
In contrast to welding units with a thyristor control of the same capacity it was
possible to considerably reduce the dimensions and the weight of the Nelweld
N1500i.
The weld currents and weld times required for stud welding can be set stepless on the
appropriately display function keys.
The entire weld cycle is coordinated by the control unit of the Nelweld N1500i and
can be visually traced by means of the LED display elements. Fault messages are
issued, and numerically coded, on the error display.
In order to keep the temperature level of the Nelweld N1500i as low as possible the
N1500i has two thermostats to monitor internal temperature level. One thermostat
is used to turn on the fan automatically when the internal temperature reaches a
level. Another thermostat checks if a higher unsafe level is reached and stops the
inverter and dis- plays an error message.
If the temperature is exceeded, the welding unit prevents welding temporarily. Thermal
overload is indicated by means of a flashing warning triangle and E011 displayed if
function key pressed.
In the Europe version the Nelweld N1500i has a 4-pole control cable socket to transmit
the controls signals to the configured weld gun.
The gun configuration always follows from the variation in method used. Thus, the
