GE DEH-40417 manual ASTAT -IBP Plus Service Instructions

ASTAT ®-IBP Plus Service Instructions

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	Figure 21. Removing the SCR Module from the mounting plate..
	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.

10 Prices and data subject to change without notice.