Load Bus Synchronization, LBS Cable, System #2 | Emerson 40-200KVA

Options

5.0OPTIONS

5.1Load Bus Synchronization

The Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS systems in synchronization even when the systems are operating in different modes and even when either or both systems are operating on batteries. When the LBS is used, one UPS system is designated as master, the other as slave.

The LBS option is typically used with dual-corded equipment or with either the Liebert® SmartSwitch™ or Liebert Static Transfer Switch™ (STS) for single-corded equipment.

5.1.1Performance Requirements

The LBS operates under the following conditions:

•Both master and slave are on inverter

(either system may be on inverter through the rectifier or on inverter through the batteries)

•Master on inverter and slave on bypass

•Master on bypass and slave on inverter

•Master and slave on bypass IF the bypass source is the same for both systems

5.1.2LBS Cable and Settings

For Liebert NX™-to-Liebert NX dual bus configuration, only one optional LBS cable is required, the built-in LBS will operate normally without an extra LBS control box or interface box. The LBS port is X4 on the Parallel Board (M3). The Parallel Board is on the interior of the Liebert NX, above and left of the power electronics; see Figures 30 and 33.

An optional, 9-pin LBS cable is used to connect two UPS systems through each system’s DB9 port on its Parallel Board. For two parallel systems, the LBS cable can be mounted between any two units belonging to different parallel systems. For information about the LBS kit or to order the optional equipment, see your local Liebert representative.

The LBS cable is connected as illustrated in Figures 12 and 13.

Figure 12 Load Bus Synchronization cable connection in single module systems

Parallel Board
	X3
X4
X2-1	X2-2
X1-1	X1-2

LBS Cable

Parallel Board

X4
X2-1	X2-2
X1-1	X1-2

The parallel board is on the interior of the Liebert® NX™ UPS, above and left of the power electronics; see Figure 29.

UPS Module or	UPS Module or
System #1	System #2

28

Image 38

Emerson 40-200KVA user manual Load Bus Synchronization, Performance Requirements, LBS Cable and Settings, System #2

Contents

Liebert NX UPS Page Table of Contents UPS Specifications Options Operating Instructions Installation Drawings OperationOperator Control and Display Panel Specifications and Technical Data Appendix a UPS Status Messages Connecting EPO push button Tables 114 Viii Important Safety Instructions Page Battery Cabinet Precautions Page Glossary of Symbols Introduction External Inspections Internal Inspections Preliminary Checks UPS Location Special Considerations for Parallel Systems Battery LocationConsiderations in Moving the Liebert NX Final Position Clearances Floor InstallationMechanical Considerations Cable Entry Optional Cabinets Front of Units Front of Units Lug Size and Torque Requirements Power CablingCable Rating UPS Input Configuration Cabling Guidelines Protective Devices Safety GroundCable Connections UPS Rectifier and Bypass Input Supply Dual Input Connections Cabling ProcedureCommon Input Connections Output System Connections-Ensure Correct Phase Rotation Frequency Converter Mode Monitor Board Features Control Cables J13 J21 J25 J22 J23 J12 J15J16 J26 J30 Dry Contacts Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface Input Dry Contacts BCB control interface Battery Circuit Breaker Control InterfaceOutput Dry Contacts Output dry contact relays Indicates Pin EPO Input-OptionalEPO input contact relays Safety External Battery Cabinet Installation Battery Cabinets Insulated Post Tray Handle For Cabling Connecting the BatteriesInstallation Considerations Connecting the Battery Cabinet to the UPS Non-Standard Batteries BCB Shunt Trip Alber Monitoring System-Optional Performance Requirements LBS Cable and SettingsLoad Bus Synchronization LBS Cable UPS General Configuring Parallel Sbasystem OperationFeatures of Parallel System 480V, 3W Output 480V, 3W System Output480V, 3W System Input RIB 2 UPS Module RIB 3 UPS Module RIB 4 UPS Module Operation Modes Summary Installing Parallel SystemOperating Principles Redundancy Paralleling Conditions for Parallel System Preliminary Checks Cabinet InstallationPower Cables Parallel Control Cables Parallel System Control Cables Auxiliary Dry Contact Cables Normally Open EPO Normally Closed EPO UPS mechanical characteristics UPS Mechanical CharacteristicsEnvironmental characteristics Conformity and Standards UPS Electrical Characteristics UPS terminal Input Rectifier Rectifier input powerRated Power kVA 100 120 160 Rated Power kVA 100 120 160 200 Liebert-approved replacement batteriesBattery Models Manufacturer Supplied DC Intermediate Circuit Inverter output Inverter OutputBypass Input Bypass input Normal UPS Mode Liebert BDC Locating the Cabinet Maintenance ModeCable Installation Input/Output Wiring Control wiring for Liebert NX UPS to Liebert BDC Liebert BDC connection to UPS Install Circuit breaker schedule Main circuit breaker Interrupting 208V Main panelboard circuit breakerPanelboard branch circuit breaker 225A T3N225TW Subfeed circuit breaker Square D I-Line panelboard circuit breaker Bolting Cabinets Together Bolting a Liebert Nxups to a Liebert BDC Outline drawing, Liebert BDC, 47 cabinet Weights, Liebert NX 40-120kVA Outline drawing, Liebert NX 40-120kVA Torque Battery cabinet groundBattery cabinet circuit breaker Unit Rating Bolt Size Lb-in N-m 80-120 225 Liebert NX 160-200kVA dimensions-front and left side Electrical specifications, Liebert NX 160-200kVA U389641 GND Front View Left View TOP View Liebert NX 160-200kVA main components-typical unit Detail a 224mm 609.3 872.2 34.3 Detail B Front Detail a CBB Installation Drawings Front Top Right Side Top Front Rear Without Covers Front Door Open Run From Conductors Front Without Covers Left Side Single module block diagram dual input configuration General Description Bypass Supplies Normal ModeBattery Mode Operating Modes Eco Mode Maintenance ModeParallel Redundancy Mode System Expansion Operator Control Panel Display Panel Layout Mimic Display Indicators Mimic display status indicators Control Buttons Control buttons Audible Buzzer LCD Overview Icons for navigation keys Navigation KeysUPS System Information Description of items in UPS system window LCD Menus and Data Items Descriptions of UPS menus and data window items Tests LanguageStart/stop Language Selection Current Date and Time Set date and time UPS Status Messages Current status and history log records 10.12.1Opening Display 10.12.2Default ScreenTypes of LCD Screens 10.12.3UPS Help Screen 10.12.4Screen Saver Window Pop-Up Windows Liebert NX Operating Modes UPS operating modes Circuit Breakers Startup ProcedureUPS Startup Indicator State Switch from Normal Mode to Bypass Mode Switch from Bypass Mode to Normal Mode Operating Instructions Operating Instructions Energize Nx 480 with Bypass Distribution Cabinet BDC Auto Restart Emergency Shutdown With EPO 11.10.1Battery Undervoltage Pre-Warning Battery ProtectionMulti-Module System Procedures 11.10.2Battery End-of-Discharge EOD Protection 103 11.11.2Inserting One Module into a Multi-Module System LED Function Status Parallel System Startup 11.11.3Shutdown Procedure-Complete UPS and Load ShutdownCommissioning a Parallel System Analog Input Interface Power OutputCommunication and Other User Terminals Liebert IntelliSlot Communication Liebert NX communication options Configuring Baud RatesSee 12.1.5 Configuring Comments Relay Card Liebert IntelliSlot Web card display Replacing Dust Filters Remote Alarm MonitorLBS Mode-Load Bus Synchronization MultiPort 4 Card Battery In-lb N-m Torque specificationsBattery torque rating Lug Size and Torque Requirements Parallel system current table Cable Lengths Floor to Connection Point Inside UPSDistance to connection points on the Liebert NX UPS External cabinet dimensions, including side panels Cable size and tightening torques 113 Battery Run Times Enersys battery run times in minutes D Dynasty battery run times in minutes Specifications and Technical Data 116 UPS status messages Event Message Description / Suggested Action if any 118 119 120 121 Twor k Ne tIs t Care