GE Industrial Solutions ASTAT-IBP Plus Solid State Starters - Manual (Page 14)

ASTAT ® -IBP Plus Service Instructions
10 Prices and data subject to change without notice.
7. Lift out the SCR Module, as shown in Figure 21.
Retain all parts and hardware for reassembly with
the replacement Module.
8. Remove the threaded stud from the SCR Module
and attach it to the new Module. Tighten to 200 in-
lb torque.
9. Clean the heat sink surface of the replacement
Module with a fine abrasive, such as Scotchbrite.
Remove all particles from the heat sink surface and
wipe the SCR mounting surface with a mild solvent.
Apply a light coat of thermal grease, such as
Electrolube 2GX to both the SCR and heat sink
surfaces.
10. Place the new SCR Module in the proper position on
the mounting surface. Move the Module back and
forth several times to evenly distribute the grease on
the plate.
11. Secure the SCR Module to the mounting plate with
the screws removed earlier. Tighten the screws to 44
in-lb torque.
12. Reattach the load-side lug, L-shaped busbar, and
CT, if applicable. Tighten the mounting bolts to 200
in-lb torque.
13. Reattach the busbars to the SCR Module. Tighten
the mounting bolts to 150 in-lb torque.
14. Attach the wiring harness of the new SCR Module to
its mating piece. Attach the harness of the CTs, if
necessary.
Figure 21. Removing the SCR Module from the mounting plate..