ONTACTING IEBERT FOR 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.
MPORTANT AFETY NSTRUCTIONS 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).
INGLE ODULE 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.
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). 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.
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 environmental conditions (temperature and physical support media).
The operations described in this section must be performed by authorized electricians or qualified technical personnel. If you have any difficulties, do not hesitate to contact Emerson Network Power Liebert Services. See the back page of this manual for contact information.
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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.
Figure 6 Liebert NXL Maintenance Bypass Cabinet—400kVA main component location GROUND OPTIONAL SOLENOID INTERLOCK MAINTENANCE ISOLATION BREAKER (MIB) FRONT INPUT OUTPUT PHASE C PHASE C OUTPUT INPUT PHASE A PHASE A INPUT OUTPUT PHASE B PHASE B BREAKER REMOVED FOR CLARITY NEUTRAL BUSBAR DE TAIL B MAINTENANCE...
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.
Table 1 Liebert-supplied interconnect wiring for one-input Liebert NXL Maintenance Bypass Cabinet Utility AC - Phase A Utility AC - Phase B Utility AC - Phase C Utility Neutral Utility Ground MBC Bypass AC - Phase A MBC Bypass AC - Phase B MBC Bypass AC - Phase C UPS Bypass AC - Phase A UPS Bypass AC - Phase B...
Table 2 Liebert-supplied interconnect wiring for two-input Liebert NXL Maintenance Bypass Cabinet Utility AC - Phase A Utility AC - Phase B Utility AC - Phase C Utility Neutral Utility Ground MBC Bypass AC - Phase A MBC Bypass AC - Phase B MBC Bypass AC - Phase C Utility Bypass AC - Phase A Utility Bypass AC - Phase B...
Table 3 Liebert-supplied interconnect wiring for three-input Liebert NXL Maintenance Bypass Cabinet Utility AC - Phase A Utility AC - Phase B Utility AC - Phase C Utility Neutral Utility Ground Utility AC - Phase A Utility AC - Phase B Utility AC - Phase C Utility AC - Phase A Utility AC - Phase B...
Figure 17 Liebert NXL Maintenance Bypass Cabinet control wire routing CONDUIT KNOCK-OUTS FOR CONTROL WIRING INTERNAL ROUTING FOR CONTROL WIRING INTERNAL ROUNTING FOR CONTROL WIRING CONDUIT KNOCK-OUTS FOR CONTROL WIRING SECTION A-A Installation Drawings FRONT VIEW...
Figure 18 Ground strap location for connected cabinets FRONT SIDE OF UNITS Typical Ground Strap Installation (Use for all connected units except Battery Cabinet) DETAIL A Installation Drawings Reference of corner post of connected cabinets Cabinet-to-Cabinet Bolting Instructions...
Notes See the Liebert NXL UPS installation manual, SL-25420, for UPS rectifier, UPS bypass and UPS out- put sizes. The manual is available at the Liebert Web site: These are guidelines only and are superseded by local regulations and codes of practice where appli- cable.