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Electrical Installation: Bottom Cable Entry
14 Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D
Preparation for bottom cable entry
a. Loosen bolts of both cable entry covers and remove.
b. Drill holes for grommets for AC, DC, and Output circuit grounding electrode cable in areas
shown.
c. Install grommets.
d. Remount covers.
Interchange of AC IN busbars for bottom entry
a. Remove nuts from M14 bolts at busbars 90 and 92.
b. Remove bolt, washer and fuse.
c. Remove bolts from M10 at busbars 90 and 92.
d. Remove busbars 90 and 92 at AC IN.
e. Move the two front isolators in the topmost busbar position two steps to the front.
f. Move the two front isolators in the lowest busbar position two steps to the rear.
g. Install busbar 90 in original position of busbar 92.
h. Install busbar 92 in original position of busbar 90.
i. Reattach M14 bolts at busbars 90 and 92.
j. Install cable lugs on busbars using M12 bolts.
Interchange of AC OUT busbars for bottom entry
a. Remove nuts from M14 bolts at busbars 93 and 95.
b. Remove bolt, washer and fuse.
c. Remove bolts from M10 at busbars 93 and 95.
d. Remove busbars 93 and 95 at AC OUT.
e. Move the two front isolators in the topmost busbar position two steps to the front.
f. Move the two front isolators in the lowest busbar position two steps to the rear.
g. Install busbar 93 in original position of busbar 95.
h. Install busbar 95 in original position of busbar 93.
i. Reattach M14 bolts at busbars 93 and 95.
j. Install cable lugs on busbars using M12 bolts.
Moving busbar for grounding
a. Move busbar for grounding from upper right corner to lower left corner as illustrated.
Note
No drilling or cutting should take place inside the UPS.