Tvss Replacement (Box Bay); Figure 51 - Tvss Protection Modules - Alpha Technologies AMPS HP2 Power System Installation & Operation Manual

8.6 TVSS Replacement (Box Bay)

Make sure the spare parts are available on site.
WARNING!
There may still be live parts inside the system and shock hazards may be present
throughout this procedure.
Alpha part number
162-602-19
WARNING!
To prevent electrical hazards such as short circuits, ensure that the system is free of
debris such as metal filings, screws, etc. after the installation is complete.
Front Access Replacement
1. Follow steps in 8.4.1 to safely transfer load to the External MBS.
2. Remove all AC and DC power sources from the AMPS HP2 UPS.
3. Remove the AC wiring panel.
4. Remove the 1/4-20 bolts securing the cables to each TVSS module.
5. Twist the TVSS modules counterclockwise to remove.
6. Replace the TVSS modules and reinstall with the copper lockwasher. Tighten clockwise until the lockwasher
flattens.
7. Reinstall the cables with the copper hardware. Torque the copper bolts to 44-in-lbs. (3.7 ft-lbs.)
8. Put critical loads on UPS, refer to 8.4.2
0260080-J0 Rev D
Replaceable parts
Description
Strikesorb 40 TVSS protection module
Figure 51 — TVSS protection modules
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