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AC Power
For Business-Critical Continuity™
® ™
Liebert NXL Maintenance Bypass Cabinet
Installation Manual – 250-400kVA, 60Hz
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CONTACTING LIEBERT FOR SUPPORT To contact Emerson Network Power Liebert Services for information or repair service in the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Services offers a complete range of start-up services, repair services, preventive maintenance plans and service contracts. For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services, if available in your area. For areas not covered by Liebert Services, the authorized distr
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.0 SINGLE-MODULE MECHANICAL INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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 Maintena
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation of your ™ Liebert NXL Maintenance Bypass Cabinet. WARNING ! Exercise extreme care when handling cabinets to avoid equipment damage or injury to personnel. The Liebert NXL Maintenance Bypass Cabinet weight ranges from 700 to 900 lb (317 to 409kg). Locate center of gravity symbols and determine unit weight before handling each cabinet. Test lift and bala
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Single-Module Mechanical Installation 1.0 SINGLE-MODULE MECHANICAL INSTALLATION 1.1 Introduction This section describes the requirements that must be taken into account when planning the position- ing and cabling of the Liebert NXL Maintenance Bypass Cabinet. This chapter is a guide to general procedures and practices that should be observed by the installing engineer. The particular conditions of each site will determine the applicability of such procedures. WARNING ! Do not apply electrical p
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Single-Module Mechanical Installation 1.3.2 Storage Should the equipment not be installed immediately, it must be stored in a room for protection against excessive humidity and or heat sources (see Table 6). 1.4 Positioning The cabinet is structurally designed to handle lifting from the base. Access to the power terminals, auxiliary terminals blocks and power switches is from the front. The top and front removable panels are secured to the chassis by screws. The door can be opened to give acce
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Single-Module Mechanical Installation 1.6 Power Cables The Maintenance Bypass Cabinet requires both power and control cabling once it has been mechani- cally installed. All control cables must be separate from the power cables. Run control cables in metal conduits or metal ducts that are electrically bonded to the cabinets they are connected to. The cable design must comply with the voltages and currents provided in Tables 7 and 8, follow local wiring practices and take into consideration the
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Single-Module Mechanical Installation 1.6.1 Power Cable Connection Procedure The system input, UPS bypass, UPS output and system output cables (all require lug type termina- tions) are connected to busbars situated behind the power isolator switches as shown in 2.0 - Instal- lation Drawings. These are accessible when the power compartment door is opened. Equipment Ground The equipment ground busbar is located near the input and output power supply connections as shown in 2.0 - Installation Draw
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Single-Module Mechanical Installation Once the equipment has been finally positioned and secured, connect the power cables as described in the following procedure. Refer to the appropriate cable connection drawing in 2.0 - Installation Drawings. 1. Verify that the bypass equipment is isolated from its external power source and all the power isolators are open. Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent operation. 2. Op
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Installation Drawings 2.0 INSTALLATION DRAWINGS Figure 2 Two-Breaker Maintenance Bypass Cabinet, one-input, attached Two Breaker Maintenance Bypass Cabinet FBO MBB Critical Load I Load Bank (FBO) BFB DC Bus CB1 CB2 N Main Input MBJ Switchgear UPS Module EG MIB - Maintenance Isolation Breaker Battery MBB - Maintenance Bypass Breaker System MBD FBO – Furnished By Others N – Neutral EG – Equipment Ground MBJ – Main Bonding Jumper (3-wire systems only) I - Option Interlock 7 MIB
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Installation Drawings Figure 3 Two-Breaker Maintenance Bypass Cabinet, two-input, attached Two Breaker Maintenance Bypass Cabinet MBB Critical Load FBO I Load Bank (FBO) BFB DC Bus FBO CB1 CB2 N Main Input MBJ Switchgear UPS Module EG MIB - Maintenance Isolation Breaker Battery BIB - Bypass Input Breaker System MBD MBB - Maintenance Bypass Breaker FBO – Furnished By Others N – Neutral EG – Equipment Ground MBJ – Main Bonding Jumper (3-wire systems only) I - Option Interlock Figure 4 Two-Br
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Installation Drawings Figure 5 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA main component location INPUT OUTPUT PHASE C PHASE C OUTPUT INPUT PHASE A PHASE A BREAKER REMOVED FOR CLARITY INPUT OUTPUT PHASE B PHASE B GROUND NEUTRAL BUSBAR DETAIL B A OPTIONAL SOLENOID INTERLOCK B MAINTENANCE MAINTENANCE BYPASS ISOLATION BREAKER BREAKER (MBB) (MIB) CONTROL WIRING TERMINAL BLOCK (TB1) A FRONT SECTION A-A 9
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Installation Drawings Figure 6 Liebert NXL Maintenance Bypass Cabinet—400kVA main component location INPUT OUTPUT PHASE C PHASE C OUTPUT INPUT PHASE A PHASE A INPUT OUTPUT PHASE B GROUND PHASE B BREAKER REMOVED FOR CLARITY NEUTRAL BUSBAR DETAIL B A NEUTRAL BUSBAR LOCATED IN REAR CORNER FOR ADDITIONAL LANDING SPACE OPTIONAL SOLENOID INTERLOCK B MAINTENANCE BYPASS MAINTENANCE BREAKER ISOLATION (MBB) BREAKER (MIB) CONTROL WIRING TERMINAL BLOCK (TB1) A FRONT SECTION A-A 10
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Installation Drawings Figure 7 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA outline drawing 31.3 (795) CONDUIT 24.0 4.9 (610) LANDING (124) 24.8 AREA TYP (630) 56.8 3.9 21.1 (1442) (100) (535) TYP KNOCK-OUT FOR CONTROL WIRING O 1" 3 PLCS BOTTOM VIEW (FOOTPRINT) TOP VIEW (DOOR OPEN) 76.8 (1951) CG CG 38.5 38.5 (979) (979) 22.7 12.2 (578) (309) 33.5 24.2 (850) (615) NOTES: 21.9 CONDUIT (555) 1. All dimensions are in inches (mm). LANDING 2. 24" minimum clearance above unit required for ai
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Installation Drawings Figure 8 Liebert NXL Maintenance Bypass Cabinet—400kVA outline drawing 37.3 (947) 4.9 24.0 Conduit (124) (610) Landing TYP 30.8 Area (782) 3.9 21.1 62.8 (100) (535) (1595) TYP Knock-out for control wiring O 1.0" (25.4mm) 3 Places BOTTOM VIEW (FOOTPRINT) TOP VIEW (DOOR OPEN) 76.8 (1950) CG CG 38.5 38.5 (979) (979) 12.2 28.2 (309) ( 716) 39.4 24.2 (1000) (615) See Note 11 See Note 10 FRONT SIDE VIEW 21.9 Conduit NOTES: (556) Landing 1. All dimensions are in inches (mm). Area
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Installation Drawings Figure 9 Liebert NXL Maintenance Bypass Cabinet—250 and 300kVA terminal details 2.6 2.6 (65 ) (65 ) 1.6 (40 ) NOTE: ALL DIMENSIONS ARE IN inches (mm). 2.0 2.0 (51 ) (51 ) 4.8 (123 ) 1.8 TYP (45 ) BUS BAR DETAIL A .6 O (14) TOP VIEW BREAKER REMOVED FOR CLARIY T 8 PLACES 1.8 CUSTOMER TYP (45) CONNECTION 1.8 (44) BUS TERMINATION DETAIL A FRONT VIEW SIDE VIEW 13
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Installation Drawings Figure 10 Liebert NXL Maintenance Bypass Cabinet—400Kva terminal details 2.57 2.57 (65 ) (65) 1.59 4.59 (40) .56 (117) O (14) TYP 1.75 8 PLACES (44 ) TYP 1.75 (44 ) 2.00 2.00 CUSTOMER (51 ) (51) 4.84 CONNECTION BUS TERMINATION DETAIL (123) AREA 1.78 (45) BUSBAR DETAIL A TOP VIEW BREAKERS REMOVED FOR CLARITY 1.75 (44 ) ) ( 44 1.75 TYP (BOTTOM TYP (TOP ENTRY) ENTRY) 3.1 (79) O .56 1.37 X .56 SLOT (14) TYPICAL TYPICAL (20 PLACES) (24 PLACES) A AUX NEUTRAL BUS DETAIL
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3 1 B C - 3 - 1 B C Installation Drawings Figure 11 Cable routing TOP ENTRY NOTES: 1. Cables from lower busbars must be routed and tied to the aligning holes on the the cable landing bar directly above (see figure below). Installation method is to prevent cables from lower busbars from contacting the upper busbars. 2. Cables from upper busbars can be optionally tied also, as shown in top entry view. BOTTOM ENTRY NOTES: 3. The UPS output phase cables must be run 1. Cables from
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REAR Installation Drawings Figure 12 Liebert NXL Maintenance Bypass Cabinet, one-input system, point-to-point wiring to UPS S MBB MIB P Q R N H C O F A L D T G B M U E V FRONT V BYPASS (+) NEUTRAL L (-) H K G J C F I B A K C J B I P A C O N B M A OUTPUT NEUTRAL UPS 16
