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- Page 1 Liebert® NXL™ Maintenance Bypass Cabinet Installation Manual — 250-500kVA, 60Hz...
- Page 2 The information contained in this document is subject to change without notice and may not be suitable for all applications. While every precaution has been taken to ensure the accuracy and completeness of this document, Vertiv assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions.
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Page 3: Table Of Contents
Figure 2 Liebert NXL two-breaker Maintenance Bypass Cabinet, two-input to UPS dual input, attached8 Figure 3 Liebert NXL two-breaker Maintenance Bypass Cabinet, three-input, attached..9 Figure 4 Liebert NXL two-breaker Maintenance Bypass Cabinet—250 and 300kVA main com- ponent location. - Page 4 Figure 14 Liebert NXL two-breaker Maintenance Bypass Cabinet control wire routing ..21 Figure 15 Ground strap location for connected cabinets ........22...
- Page 5 Two-breaker control wiring connections with interlock ......20 Table 4 Liebert NXL Maintenance Bypass Cabinet specifications......23 Table 5 Liebert NXL Maintenance Bypass Cabinet current ratings—System Output .
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Page 7: Important Safety Instructions
Risk of moving heavy units and tipping hazard. Can cause equipment damage, injury and death. Exercise extreme care when handling cabinets to avoid equipment damage or injury to personnel. The Liebert NXL Maintenance Bypass Cabinet weighs up to 755 lb (342.5kg). Locate center of gravity symbols and determine unit weight before handling each cabinet. - Page 8 Operating this device in a residential area is likely to cause harmful interference that users must correct at their own expense. The Liebert NXL complies with the requirements of EMC Directive 2004/108/EC and the published technical standards. Continued compliance requires installation in accordance with these instructions and use of accessories approved by Vertiv.
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Page 9: Single-Module Mechanical Installation
NOTICE Three-phase input supply required. The standard Liebert NXL UPS is suitable for connection to three-phase, four-wire (+ Earth) TN-C, TN-S, IT-G, IT-IG or, three-phase, three-wire plus ground, IT-UG. If using with IT Power system, a 4-pole disconnect device must be included as part of building installation. -
Page 10: Environmental Considerations
(see 3.0 - Specifications). All models of the Liebert NXL Maintenance Bypass Cabinet are convection-cooled. To permit air to enter and exit and prevent overheating or malfunctioning, do not cover the ventilation openings. -
Page 11: Clearances
1.4.2 Clearances Liebert NXL Maintenance Bypass Cabinets have no ventilation grilles at either side or at the rear. Clearance around the front of the equipment should be sufficient to enable free passage of personnel with the doors fully opened. -
Page 12: Power Cable Connection Procedure
The grounding cable connecting the UPS to the main ground system must follow the most direct route possible. • Consider using smaller, paralleled cables for heavy currents as a way of easing installation. Figure 1 Cabinet arrangement—Liebert NXL UPS, battery cabinets, Maintenance Bypass Cabinet Liebert If a maintenance bypass cabinet is used, it must be installed on the right side of the Liebert NXL UPS. - Page 13 If you have any difficulties, do not hesitate to contact Vertiv. See the back page of this manual for contact information. NOTE Proper grounding considerably reduces problems in systems caused by electromagnetic interference. ® ™ ™ | Liebert 250-500kVA Installation Manual | Vertiv...
- Page 14 Connect the auxiliary cables of any external interface/signals to the respective connections of the output auxiliary terminal block (X4) (see 2.0 - Installation Drawings). 8. Replace interior panels and close door. ® ™ ™ Vertiv | Liebert 250-500kVA Installation Manual |...
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Page 15: Installation Drawings
Installation Drawings 2.0 INSTALLATION DRAWINGS Figure 2 Liebert NXL two-breaker Maintenance Bypass Cabinet, two-input to UPS dual input, attached Two Breaker Maintenance Bypass Cabinet Critical Load Load Bank (FBO) DC Bus Main Input Switchgear UPS Module MIB - Maintenance Isolation Breaker... - Page 16 Installation Drawings Figure 3 Liebert NXL two-breaker Maintenance Bypass Cabinet, three-input, attached Two Breaker Maintenance Bypass Cabinet Critical Load Load Bank (FBO) DC Bus Main Input Switchgear UPS Module MIB - Maintenance Isolation Breaker Battery BIB - Bypass Input Breaker...
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Page 17: Figure 4 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-250 And 300Kva Main Component
Installation Drawings Figure 4 Liebert NXL two-breaker Maintenance Bypass Cabinet—250 and 300kVA main component location Input Output Phase C Phase C Input Output Phase A Phase A Breaker Not Shown Input Output Phase B Phase B Ground Neutral BUSBAR DETAIL B... -
Page 18: Figure 5 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-400Kva And 500Kva Main
Installation Drawings Figure 5 Liebert NXL two-breaker Maintenance Bypass Cabinet—400kVA and 500kVA main component location Input Output Phase C Phase C Input Output Phase A Phase A Input Neutral Output Phase B Ground Phase B Breaker Not Shown Busbar Detail B... -
Page 19: Figure 6 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-250 And 300Kva Outline
Installation Drawings Figure 6 Liebert NXL two-breaker Maintenance Bypass Cabinet—250 and 300kVA outline drawing 31.3" (795mm) 24" 4.9" Conduit (610mm) (124mm) Landing Typical 24.8" Area (630mm) 21.1" 3.9" 56.8" (535mm) (100mm) (1442mm) Typical Knock-Out for Control Wiring BOTTOM VIEW Ø 1" 3 Places... -
Page 20: Figure 7 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-400Kva And 500Kva Out- Line
Installation Drawings Figure 7 Liebert NXL two-breaker Maintenance Bypass Cabinet—400kVA and 500kVA outline drawing 37.3" (947mm) 4.9" 24" (124mm) Conduit (610mm) Typical Landing 30.8" Area (782mm) 21.1" 3.9" 62.8" (535mm) (100mm) (1595mm) Typical Knock-out for control wiring Ø 1.0" (25.4mm) -
Page 21: Figure 8 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-250 And 300Kva Terminal
Installation Drawings Figure 8 Liebert NXL two-breaker Maintenance Bypass Cabinet—250 and 300kVA terminal details 2.6" (65mm) 2.6" (65mm) 1.6" (40mm) 2" (51mm) 4.8" (123mm) 1.8" (45mm) Typical BUSBAR DETAIL A TOP VIEW Ø 0.6" (14mm) Breaker Not Shown 8 Places, Typical 1.8"... -
Page 22: Figure 9 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet-400Kva And 500Kva Termi
Installation Drawings Figure 9 Liebert NXL two-breaker Maintenance Bypass Cabinet—400kVA and 500kVA terminal details 2.57" (65mm) 2.57" (65mm) 1.59" (40mm) 4.59" Ø 0.56" (14mm) (117mm) 1.75" 8 Places Typical Typical (44mm) 1.75" (44mm) 2" 2" Customer BUS TERMINATION (51mm) (51mm) Connnection 4.84"... -
Page 23: Figure 10 Cable Routing-Two-Breaker Style
2. Cables from upper busbars can be optionally tied also, as shown in top entry view. 3. The UPS output phase cables must be run on the left side of cabinet, outside of the ground bus. ® ™ ™ | Liebert 250-500kVA Installation Manual | Vertiv... -
Page 24: Figure 11 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet, Point-To-Point Wiring To Ups
Installation Drawings Figure 11 Liebert NXL two-breaker Maintenance Bypass Cabinet, point-to-point wiring to UPS FRONT BYPASS NEUTRAL OUTPUT NEUTRAL ® ™ ™ Vertiv | Liebert 250-500kVA Installation Manual |... -
Page 25: Cabinet
Installation Drawings Table 1 Vertiv-supplied interconnect wiring for Liebert NXL two-breaker Maintenance Bypass Cabinet From Conductor Utility AC - Phase A MBC Bypass AC - Phase A Maintenance Bypass AC - Phase A Utility AC - Phase B MBC Bypass AC - Phase B... -
Page 26: Table 2 Two-Breaker Control Wiring Connections Without Interlock
Installation Drawings Figure 12 Liebert NXL two-breaker Maintenance Bypass Cabinet control wiring diagram without interlock Connection Points For UPS Control Board 02-806708 TB0821 TB0811 TB0813 LOW VO LTAGE TERMINA L STRIP - TB1 - TB0824 TB1-13 Table 2 Two-breaker control wiring connections without... -
Page 27: Table 3 Two-Breaker Control Wiring Connections With Interlock
Installation Drawings Figure 13 Liebert NXL two-breaker Maintenance Bypass Cabinet control wire diagram with interlock Connection Points For UPS Control Board 02-806708 TB0821 TB0811 TB0813 TB0820 TB0820 LOW VOLTAGE TERMINAL STRIP - TB1 - TB1-16 TB0820 TB1-15 Table 3 Two-breaker control wiring connections with... -
Page 28: Figure 14 Liebert Nxl Two-Breaker Maintenance Bypass Cabinet Control Wire Routing
Installation Drawings Figure 14 Liebert NXL two-breaker Maintenance Bypass Cabinet control wire routing Conduit Knockouts For Control Wiring Internal Routing For Control Wiring Internal Rounting For Control Wiring Conduit Knockouts For Control Wiring FRONT VIEW SECTION A-A ® ™ ™... -
Page 29: Figure 15 Ground Strap Location For Connected Cabinets
Figure 15 Ground strap location for connected cabinets Reference of corner post of connected cabinets FRONT SIDE OF UNITS DETAIL A Cabinet-to-Cabinet Typical Ground Strap Installation Bolting Instructions (Use for all connected units except Battery Cabinet) ® ™ ™ | Liebert 250-500kVA Installation Manual | Vertiv... -
Page 30: Specifications
Specifications 3.0 SPECIFICATIONS Table 4 Liebert NXL Maintenance Bypass Cabinet specifications Model Size, kVA Input Parameters Input Voltage to Bypass, VAC 480V 3-phase, 3-wire or 4-wire Permissible Input Voltage Range, VAC +10% to -30% Input Frequency, Hz Permissible Input Frequency Range, Hz... -
Page 31: Table 5 Liebert Nxl Maintenance Bypass Cabinet Current Ratings-System Output
Specifications Table 5 Liebert NXL Maintenance Bypass Cabinet current ratings—System Input UPS Rating System Input Voltage (VAC) Input, Bypass Nominal Recommended External and Output Current Breaker Trip, Amps 6-Pulse Plus Filter Design Table 6 Liebert NXL Maintenance Bypass Cabinet current ratings—System Output... -
Page 32: Table 10 Recommended Conduit And Cable Sizes-Module Output
(2) 3-350kcmil, #1/0AWG (2) 3-500kcmil, #1/0AWG Notes on Tables 7 through 12 See the Liebert NXL UPS installation manual, SL-25420, for UPS rectifier, UPS bypass and UPS output sizes. The manual is available at the Liebert Web site: www.liebert.com These are guidelines only and are superseded by local regulations and codes of practice where applicable. -
Page 33: Table 13 Recommended Lug Sizes
300kcmil 54914BE 54870BE 60162 60262 350kcmil 54915BE 54872BE 60165 60267 400kcmil 54916BE 54874BE 60168 60269 500kcmil 54918BE 54876BE 60171 60273 600kcmil 54920BE 54878BE 60176 60275 750kcmil 54922BE 54880BE 60178 60277 ® ™ ™ | Liebert 250-500kVA Installation Manual | Vertiv... - Page 34 Specifications Notes ® ™ ™ Vertiv | Liebert 250-500kVA Installation Manual |...
- Page 36 VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2018 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co.