ABB Chapter 6 - Changing Clamp Diodes in 3/5 MVA Phase Modules
ACS 6000 Maintenance Manual 3BHS202077 ZAB E01 Rev. C 6-3 (4)
6 Lift the cooler which is above the diode to be changed and then
remove the diode.
Figure 6-5 Removing the Diode
7 Thoroughly clean the contact surfaces of the cooler, the isolator disk
and the new diode with an appropriate solvent (e. g. alcohol). Using
a fluff-free cloth wipe the surfaces paying attention not to scratch the
surfaces.
Note: Do not use any grease or any electrical joint compound.
8 Place the new diode in the stack.
9 Put the isolator disc back in its place.
10 Tighten the pressure adjusting bolt until the clamp pressure loading
gauge is released.
11 Refit the clamp pressure loading gauge in its storage place on the
side of the phase module.
12 Turn the phase module back into the proper mounting position.
13 Reconnect the mounting brackets with the fastening bolts.
14 Lift the module onto the rails and install the phase module following
section
4.3 Installing a Phase Module
.
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