Symmetrical gate commutated thyristor replacement – Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control User Manual
Page 293
Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014
293
Component Definition and Maintenance
Chapter 5
Figure 242 - Detail of the clamping assembly
Symmetrical Gate
Commutated Thyristor
Replacement
The Symmetrical Gate Commutated Thyristor (SGCT or device) with attached
circuit board is located within the PowerCage assembly.
SGCTs must be replaced in matched sets:
•
4160V systems use sets of 2
•
6600V systems use sets of 3
SGCTs can be removed and replaced without interrupting the cooling fluid path.
To remove SGCTs, the following procedure is to be employed:
Clamp Head
DO NOT ADJUST calibration nut.
Adjusting Nut used for loosening
and applying load to assembly.
Disc Springs
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