Rockwell Automation 1560E SMC Flex Smart Motor Controller - Manual (Page 137)

Troubleshooting 9-19
To Remove SCR:
• Remove shorting bar hardware
• Pry opposing Heatsinks apart
• Extract SCR
To Insert New SCR:
• Apply thin film of electrical joint compound to
surfaces of SCR
• Install SCR so that it is seated in locating pin of
heatsink (note orientation of SCR).
• Pry heatsinks to close gap, ensuring that SCR is
seated properly in both its locating pins.
• Rotate SCR so that all leads have same direction.
Shorting Bar Hardware
SCR 1
Heatsink 2
Heatsink 1
Locating Pin
Heatsink 3
SCR 2
To Remove SCR:
• Remove shorting bar hardware
• Pry opposing Heatsinks apart
• Extract SCR
To Insert New SCR:
• Apply thin film of electrical joint compound to
surfaces of SCR
• Install SCR so that it is seated in locating pin of
heatsink (note orientation of SCR).
• Pry heatsinks to close gap, ensuring that SCR is
seated properly in both its locating pins.
• Rotate SCR so that all leads have same direction.
Shorting Bar Hardware
SCR 1
Heatsink 2
Heatsink 1
Locating Pin
Heatsink 3
SCR 2
Figure 9.7 – Removal of SCR (1000 to 2400 V, 180/360 A)