ABB ACS 6000 - Changing RC-IGCTs in 3;5 MVA Phase Modules

ABB
ACS 6000 Maintenance Manual 3BHS202077 ZAB E01 Rev. C 5-1 (2)
Chapter 5 - Changing RC-IGCTs
in 3/5 MVA Phase Modules
1 Follow section 4.2 Removing a Phase Module until the phase module
has been extracted from the cabinet.
The phase module can remain on the rails for replacing an RC-IGCT.
2 Loosen the hexagon fastening bolts (12) (see arrows in
Figure 5-1 ) of
the RC-IGCTs and pull out the two retaining rods.
Figure 5-1 Phase Module
3 Slide the clamp pressure loading gauge (attached to the side of the
phase module, see
Figure 5-1 ) under the clamp ring of the pressure
adjusting bolt and loosen the bolt to release the clamp pressure of the
stack.
Figure 5-2 Releasing the Clamp Pressure
4 Pull out the faulty RC-IGCT.
5 In case the new IGCT is not fitted with retaining clamps and guides
(see
Figure 5-3 ) remove these parts from the faulty IGCT and mount
Retaining rod
Clamp pressure
loading gauge
Retaining rod
Clamp pressure loading gauge
Clamp ring