Input Junction Box Installation-Optional | Liebert 100-1000A

Power and Control Wiring

Figure 3 Typical static transfer switch one-line diagram

SOURCE 1

CB1 STS1

K1

K2 K3 CB4

SOURCE 2

STS2	CB2
	CB2
	K2
CB3	K1 K3	CB5

OUTPUT

The input and output power wire size should be based on the upstream overcurrent protection device, observing the NEC and local codes.

The molded case switches contained in the Liebert STS2 are typically non-automatic circuit breakers that rely on the upstream and/or load overcurrent protection. Upstream overcurrent protection should be rated equal to or less than the rating of the Liebert STS2 molded case switches.

The Liebert STS2 input and output power and ground and neutral bus bars accommodate a wide range of wire sizes. The Liebert STS2 bus bars accommodates standard 2 hole lugs.

Table 2	Input/output conduit plate specifications

Rating		Max. number and size

100-250A		6	— 3" conduit

400-600A		9	— 4" conduit

800-1000A		12	— 4" conduits

5.2Input Junction Box Installation—Optional

The input junction box option is available to simplify input connections to the Liebert STS2. Two input junction boxes and the associated flexible 10 foot long (3 meter) input cables are provided with this option.

This option is available only with bottom cable entrance, typically when the unit is located on a raised floor.

If the input junction boxes will be used, they may be shipped either with the unit or in advance to be installed during the rough-in stage of construction.

Locate the junction boxes a maximum of 8 feet (2.4 meters) from the planned location of the Liebert STS2.

Due to a lack of clearance for the cables below the unit, the cables are also shipped loose from the unit for installation at the site. The input cables connect from the input junction boxes to the input power bus bars inside the Liebert STS2.

The standard configuration for the input junction boxes and cables is for 3-wire-plus-ground feeds. If the input neutral is required, special 4-wire-plus-ground input cables and junction boxes are required. See Figure 29 for wiring details.

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Image 18

Liebert 100-1000A user manual Input Junction Box Installation-Optional, Input/output conduit plate specifications

Contents

Liebert STS2 Page Table of Contents Alarm and Faults Theory of Operation Communication Interfaces Liebert STS2 Touch Screen Display Specifications Event Message Help Text 17.0 Maintenance Figures Tables Important Safety Instructions Overview of Manual Safety Precautions External Inspections Unloading and HandlingUnpacking and Inspections Internal Inspections Handling ConsiderationsUnit Preparation Heat Output Recommended Minimum Service ClearancesOperating Temperature Range 0 to 40C 32 to 104F Operating Environment Altitude Recommended derating for high altitude operation Leveling and Anchoring the Unit to the Floor Leveling of the Static Switch Without AnchoringLeveling and Anchoring the Static Switch Using Floor Stand Locating the Liebert STS2 Input And Output Power Connections Power and Control Wiring Input Junction Box Installation-Optional Input/output conduit plate specificationsRating Max. number and size Length Width Height Switch Rating Inches mm Input junction box dimensionsInput junction box terminal wire size range Switch Rating Power and Ground Lug Wire Range Source MICB1 MICB2 Isolation Transformer Control Wiring ConnectionsSystem Grounding CB4 CB3 Terminal block 1 and terminal block 2 wire connections Remote Source Selection WiringPower Supply Remote source selection terminal block Options Programmable Relay BoardOptimized Transfer Programmable relay board pinout Input Contact Isolator Board Comms BoardLiebert IntelliSlot SNMP/Web/Modbus 485 Card Remote Source Selection Key Lockout SwitchLED Display Redundant Output Breaker Input Junction Boxes and Cables Seismic Floor AnchorsSeismic Floor Stand Installation Drawings Detail a Rev PS211800 Rev PS211101 Rev PS211401 PS211801 Seismic anchor Liebert STS2 STS2 Front System Seismic ANCHORING, Figure ONE-LINE Diagram Rev Section A-A ONE-LINE Diagram PS212401 Drawing 800 1000 amp Liebert STS2 with BreakerSingle output PS212801 Liebert STS2 non-automatic circuit breaker schedule ABB Control connection location diagram 100 600 amp Liebert STS2 See Option Location Detail Control Wiring Front View with Front Door Removed Option Location Detail See Note J73 J71J72 J74 Control wiring for the input contact isolator board option Table J51 02-810015-XX DB-9 ConnectionNo customer Connection No customer Control wiring for the RS-232 port TXD RXD GND Input Junction BOX Mimic Symbol Description Installation drawing, seismic floor stand 100-250A Installation drawing Seismic floor stand 100-250A Installation drawing, seismic floor Stand 100-250A PS215003 Rev Hardware Torque Chart Drawing, seismic floor stand 400-600AHeight Table PS216001 Rev Seismic floor stand 400-600A PS216002 Rev PS216003 Rev Installation drawing, seismic floor stand 800-1000A Seismic floor stand 800-1000A Front Right Isometric View Rear Right Isometric View Right Side View Front View Side ViewRight View System Description Introduction to Liebert STS2 OperationsRedundancy Modes of Operation Operator Controls Bypass General Description Theory of Operation SCR Failure Emergency TransferLoad Current Transfer Inhibit 7 On/Off Sequence Hardware Detailed Component DescriptionControls Operator Interface Firmware SCRs Audible AlarmCircuit Breakers Logic Modules Operating Instructions for the Touch Screen Interface Normal System Startup Manual Transfer / Preferred Source Selection Source transfer screen Maintenance Bypass Enabling Remote Source SelectionTo manually select the preferred source Viewing Slot for the Source 2 Gate Drive Board Touch Screen Viewing Slot for the Source 1 Gate Drive Board Bypass Procedures for Source To bypass the switch for SourceTo return to normal mode Shutdown in Static Transfer Switch Mode Shutdown in Maintenance Bypass ModeNormal System Shutdown Alarm and Faults Event Mask Event and History Logs Event LogHistory Log Alarm Notes List of Messages Alarm Message Description/Cause Action Event messages See Configuring the Input Contact Isolator Settings on Using the RS-232 Port Communication Interfaces Connecting and Using a Terminal Terminal commandsKeys Function Configuring the Liebert STS2 via the Terminal Groups ParameterItem Parameter Group settings and values Value ParameterValue types User Event Mask Setting Bitpacked Options with the Terminal Options1Comms Options Binary-hexadecimal conversions Critical Option EnablingNon-Critical Option Enabling Hex Putting the Terminal Command Together Setting Event Masks with the Terminal Examples of Event Mask Settings Display Overview Liebert STS2 Touch Screen Display Menu Overview Backspace To set or reset the password Using the Optional Key Lockout SwitchUsing the Password Changes disabled Changes enabled Event Controls Configuration MenuMimic Display Event Display User Settings To access the User Settings dialog boxTo set the event masks User settings dialog box Source Set Points To configure the setpoints for each source Button Range Default CommentsSepoint parameters Liebert STS2 Touch Screen Display Comm Options System SettingsTo access the System Settings menu Option buttons Configuring the Modem To configure the modem Configuring Pager Support Configuring the Input Contact Isolator Settings To configure the Input Contact Isolator relays Configuring the Programmable Relay Board Settings Standard settings for programmable relaysRelay Setting Definition Configuring the Liebert IntelliSlot SNMP/Web/Modbus 485 Card System Options Liebert SiteScan ConfigurationSaving Your Communications Configurations Dual Output Breaker Shunt Pole Transfer SwitchSystem ID Wye Output Transformer 13.11.2History Log Logs13.11.1Event Log To use the Event Log Cleaning the LCD Touch Screen Startup ProcedureBypass Procedure Source Transfers LEDs and Buttons and Key Lockout Switch Operating the Liebert STS2 LED DisplayFront Panel Controls Description Action LED and Push Button DescriptionLED and push button description Cause. See 12.0 Communication Interfaces for PC terminal Key Lockout Switch Event Controls Operations Normal System Startup Manual Transfer / Preferred Source Selection Maintenance Bypass 109 When the Liebert STS2 is operating on bypass Normal System Shutdown Frequency System ConfigurationSpecifications Input/Output Voltage Input Surge Suppression GroundingElectrical Requirements Response Time Casters, Leveling and Seismic Anchoring System ComponentsFrame and Enclosure Cooling Doors AccessCable Entrance Color Graphical Display or LED Display Terminal Port Connections Pin Signal Name Function / Comments15.2.9 RS-232 Port MTA plug pinout 15.2.11 RS-232 Interface Parameters RS-232 settingsParameter Setting Fuseless Design S1 SCR Short Event Message Help TextKey S2 SCR Short S2 SCR Open 119 120 S1 Volt Sense Fail S2 Volt Sense FailS1 SCR Sense Fail S2 Curr Sense Fail S2 SCR Sense FailS1 Curr Sense Fail S1 Gate Drive Fail S2 Gate Drive Fail Heat Sink Overtemp S1 UV S1 UV RMSS1 OV S1 OF/UF S1 FailS2 UV S2 UV RMS S2 OVS2 UF/OF S2 Fail S1 I-PEAK S2 I-PEAK 130 CB5 S1 BYP Closed 132 133 134 135 136 137 Proper Tightening of Nuts and Bolts Testing the Liebert STS2Maintenance Changing the Air Filter Support Information Programmable Relay Board Settings Record Channel Channel PRB Notes Input Contact Isolator Settings Record Page Twor k Ne tIs t Care