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FIGURES
Figure 1 Cabinet arrangement—Liebert NXL UPS, battery cabinets, maintenance bypass cabinet. . . . . . 4
Figure 2 Two-Breaker Maintenance Bypass Cabinet, one-input, attached . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3 Two-Breaker Maintenance Bypass Cabinet, two-input, attached . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4 Two-Breaker Maintenance Bypass Cabinet, three-input, attached or detached . . . . . . . . . . . . . . 8
Figure 5 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA main component location. . . . . . . 9
Figure 6 Liebert NXL Maintenance Bypass Cabinet—400kVA main component location . . . . . . . . . . . . . 10
Figure 7 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA outline drawing . . . . . . . . . . . . . 11
Figure 8 Liebert NXL Maintenance Bypass Cabinet—400kVA outline drawing. . . . . . . . . . . . . . . . . . . . . 12
Figure 9 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA terminal details . . . . . . . . . . . . . 13
Figure 10 Liebert NXL Maintenance Bypass Cabinet—400Kva terminal details. . . . . . . . . . . . . . . . . . . . . 14
Figure 11 Cable routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 Liebert NXL Maintenance Bypass Cabinet, one-input system, point-to-point wiring
to UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13 Liebert NXL Maintenance Bypass Cabinet, two-input system, point-to-point wiring
to UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14 Liebert NXL Maintenance Bypass Cabinet, three-input system, point-to-point wiring
to UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 15 Liebert NXL Maintenance Bypass Cabinet Control wire diagram without interlock . . . . . . . . . 22
Figure 16 Liebert NXL Maintenance Bypass Cabinet control wire diagram with interlock. . . . . . . . . . . . . 23
Figure 17 Liebert NXL Maintenance Bypass Cabinet control wire routing. . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 18 Ground strap location for connected cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
TABLES
Table 1 Liebert-supplied interconnect wiring for one-input Liebert NXL Maintenance
Bypass Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 2 Liebert-supplied interconnect wiring for two-input Liebert NXL Maintenance
Bypass Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 3 Liebert-supplied interconnect wiring for three-input Liebert NXL Maintenance
Bypass Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 4 Control wiring connections without interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 5 Control wiring connections with interlock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 6 Liebert NXL Maintenance Bypass Cabinet specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 7 Liebert NXL Maintenance Bypass Cabinet current ratings—System Input . . . . . . . . . . . . . . . . 27
Table 8 Liebert NXL Maintenance Bypass Cabinet current ratings—System Output . . . . . . . . . . . . . . . 27
Table 9 Recommended conduit and cable sizes—Maintenance Bypass Input . . . . . . . . . . . . . . . . . . . . . . 27
Table 10 Recommended conduit and cable sizes—Rectifier Input (1-Input System). . . . . . . . . . . . . . . . . . 27
Table 11 Recommended conduit and cable sizes—Module Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12 Recommended conduit and cable sizes—Module Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 13 Recommended conduit and cable sizes—Load Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 14 Recommended conduit and cable sizes—Load Bank Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 15 Recommended lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
