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Component
Description
15BR1
Rectifier bridge. See the description of 15AP1:1 on page 26 and the
assembly instructions on page 59.
15D1, 15D2
Rectifier and freewheel diode modules. Each module consists of two
diodes.
15D1 rectifies the welding current. During the time interval between two
voltage pulses from transformer 15TM1, the freewheel diodes 15D2
maintain the welding current from inductor 15L3.
See page 59 for assembly instructions for the diode modules.
15EV1, 15EV2
Fans, 24 V DC. See the description of 20AP1:2 on page 33.
15L1, 15L2
2 + 2 ferrite rings. Reduce transient voltages produced when the diode
modules 15D1 and 15D2 turn off.
15L3
Inductor.
15Q1, 15Q2
IGBT transistors. See the description of 15AP1:2 on page 27 and the
installation instructions on page 59.
15ST1
Thermal overload cutout, in the winding of main transformer TM1. See the
description of 20AP1:4 on page 36.
15ST2
Thermal overload cutout, mounted on the heat sink for the IGBT modules.
See the description of 20AP1:4 on page 36 and the installation
instructions on page 59.
15TM1
Main transformer.
20AP1
Controller circuit board.
20AP2
Relay board.
cu19_00
- - 12 - -
S0740 800 191/E080229/P78
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