Operator Controls, Bypass | Liebert 100-1000A specification

Introduction to Liebert STS2 Operations

8.2.4Bypass

The static transfer switch can be manually bypassed to allow the power from a source to directly flow to the output load. This bypass allows the unit’s electronics to be serviced without dangerous voltages being present.

The Liebert STS2 includes key-interlocked maintenance bypass breakers that allow either input source’s electronics to be bypassed for maintenance without interruption of power to the load. The maintenance bypass allows all electronics to be isolated from the input, output, and bypass connections. Bypass instructions are available from the touch screen and are discussed later in this manual.

8.3Operator Controls

The Liebert STS2 is equipped with an interface to configure and monitor the unit either locally or remotely. The Color Graphical Display is a touch screen LCD that provides a color diagram (Mimic) that displays the current status of the unit. System parameters are displayed and help is available to define events. See Figure 44 below and Figure 30. The touch screen menus allow the operator to initiate source transfers, view event and history logs, and view bypass and other operational instructions.

Figure 44 Liebert STS2 touch screen display

Mimic

Event controls						Display Panel
Event controls

						and
						and
Event Display						Help Screen
Event Display

Menu Options

Touch screen control buttons allow you to reset alarms, silence the audible alarm, review configurations, event and history logs, preferred source, startup and bypass procedures, and the help menu. Qualified personnel, with a password, can use these menus to configure parameters, select a preferred source and do manual source transfers.

LED display units do not have the color LCD touch screen. Instead of the touch screen, these units are monitored by a series of LEDs and controlled by a series of push buttons.

Both units can be accessed from a terminal, or a PC running terminal emulation software, that is attached to the unit. Through the RS-232 access, you can monitor and configure the unit, plus remotely select a preferred source. See 12.1 - Using the RS-232 Port on page 76 for instructions on using the RS-232 interface.

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Liebert 100-1000A user manual Operator Controls, Bypass

Contents

Liebert STS2 Page Table of Contents Theory of Operation Alarm and Faults Liebert STS2 Touch Screen Display Communication Interfaces Event Message Help Text 17.0 Maintenance Specifications Figures Tables Important Safety Instructions Overview of Manual Safety Precautions Unloading and Handling External InspectionsUnpacking and Inspections Handling Considerations Internal InspectionsUnit Preparation Operating Environment Recommended Minimum Service ClearancesOperating Temperature Range 0 to 40C 32 to 104F Heat Output Recommended derating for high altitude operation Altitude Locating the Liebert STS2 Leveling of the Static Switch Without AnchoringLeveling and Anchoring the Static Switch Using Floor Stand Leveling and Anchoring the Unit to the Floor Power and Control Wiring Input And Output Power Connections Input/output conduit plate specifications Input Junction Box Installation-OptionalRating Max. number and size Switch Rating Power and Ground Lug Wire Range Input junction box dimensionsInput junction box terminal wire size range Length Width Height Switch Rating Inches mm CB4 CB3 Control Wiring ConnectionsSystem Grounding Source MICB1 MICB2 Isolation Transformer Remote source selection terminal block Remote Source Selection WiringPower Supply Terminal block 1 and terminal block 2 wire connections Programmable relay board pinout Programmable Relay BoardOptimized Transfer Options Comms Board Input Contact Isolator BoardLiebert IntelliSlot SNMP/Web/Modbus 485 Card Redundant Output Breaker Key Lockout SwitchLED Display Remote Source Selection Seismic Floor Anchors Input Junction Boxes and CablesSeismic Floor Stand Detail a Installation Drawings Rev PS211800 Rev PS211101 Rev PS211401 PS211801 Liebert STS2 Seismic anchor STS2 System Seismic ANCHORING, Figure Front ONE-LINE Diagram Rev Section A-A ONE-LINE Diagram PS212401 Breaker Drawing 800 1000 amp Liebert STS2 withSingle output PS212801 ABB Liebert STS2 non-automatic circuit breaker schedule See Option Location Detail Control connection location diagram 100 600 amp Liebert STS2 Front View with Front Door Removed Option Location Detail Control Wiring See Note J74 J71J72 J73 Table J51 Control wiring for the input contact isolator board option 02-810015-XX No customer ConnectionNo customer Connection DB-9 TXD RXD GND Control wiring for the RS-232 port Input Junction BOX Mimic Description Symbol Installation drawing, seismic floor stand 100-250A Seismic floor stand 100-250A Installation drawing Stand 100-250A Installation drawing, seismic floor PS215003 Rev Drawing, seismic floor stand 400-600A Hardware Torque ChartHeight Table Seismic floor stand 400-600A PS216001 Rev PS216002 Rev PS216003 Rev Installation drawing, seismic floor stand 800-1000A Seismic floor stand 800-1000A Right Side View Front Right Isometric View Rear Right Isometric View View Side ViewRight Front View Introduction to Liebert STS2 Operations System DescriptionRedundancy Modes of Operation Bypass Operator Controls Theory of Operation General Description 7 On/Off Sequence Emergency TransferLoad Current Transfer Inhibit SCR Failure Firmware Detailed Component DescriptionControls Operator Interface Hardware Logic Modules Audible AlarmCircuit Breakers SCRs Operating Instructions for the Touch Screen Interface Normal System Startup Source transfer screen Manual Transfer / Preferred Source Selection Enabling Remote Source Selection Maintenance BypassTo manually select the preferred source Touch Screen Viewing Slot for the Source 1 Gate Drive Board Viewing Slot for the Source 2 Gate Drive Board To bypass the switch for Source Bypass Procedures for SourceTo return to normal mode Shutdown in Maintenance Bypass Mode Shutdown in Static Transfer Switch ModeNormal System Shutdown Event Mask Alarm and Faults Event Log Event and History LogsHistory Log List of Messages Alarm Notes Event messages Alarm Message Description/Cause Action See Configuring the Input Contact Isolator Settings on Communication Interfaces Using the RS-232 Port Terminal commands Connecting and Using a TerminalKeys Function Groups Parameter Configuring the Liebert STS2 via the TerminalItem Parameter Value Parameter Group settings and valuesValue types Event Mask User Options1 Setting Bitpacked Options with the TerminalComms Options Hex Critical Option EnablingNon-Critical Option Enabling Binary-hexadecimal conversions Putting the Terminal Command Together Examples of Event Mask Settings Setting Event Masks with the Terminal Liebert STS2 Touch Screen Display Display Overview Backspace Menu Overview Changes disabled Changes enabled Using the Optional Key Lockout SwitchUsing the Password To set or reset the password Event Display Configuration MenuMimic Display Event Controls To access the User Settings dialog box User SettingsTo set the event masks Source Set Points User settings dialog box Button Range Default Comments To configure the setpoints for each sourceSepoint parameters Liebert STS2 Touch Screen Display Option buttons System SettingsTo access the System Settings menu Comm Options To configure the modem Configuring the Modem Configuring Pager Support To configure the Input Contact Isolator relays Configuring the Input Contact Isolator Settings Standard settings for programmable relays Configuring the Programmable Relay Board SettingsRelay Setting Definition Configuring the Liebert IntelliSlot SNMP/Web/Modbus 485 Card Dual Output Breaker Liebert SiteScan ConfigurationSaving Your Communications Configurations System Options Wye Output Transformer Pole Transfer SwitchSystem ID Shunt To use the Event Log Logs13.11.1Event Log 13.11.2History Log Source Transfers Startup ProcedureBypass Procedure Cleaning the LCD Touch Screen Operating the Liebert STS2 LED Display LEDs and Buttons and Key Lockout SwitchFront Panel Controls Cause. See 12.0 Communication Interfaces for PC terminal LED and Push Button DescriptionLED and push button description Description Action Event Controls Key Lockout Switch Normal System Startup Operations Manual Transfer / Preferred Source Selection Maintenance Bypass 109 Normal System Shutdown When the Liebert STS2 is operating on bypass Input/Output Voltage System ConfigurationSpecifications Frequency Response Time GroundingElectrical Requirements Input Surge Suppression Cooling System ComponentsFrame and Enclosure Casters, Leveling and Seismic Anchoring Color Graphical Display or LED Display AccessCable Entrance Doors MTA plug pinout Pin Signal Name Function / Comments15.2.9 RS-232 Port Terminal Port Connections Fuseless Design RS-232 settingsParameter Setting 15.2.11 RS-232 Interface Parameters S2 SCR Short Event Message Help TextKey S1 SCR Short S2 SCR Open 119 120 S2 Volt Sense Fail S1 Volt Sense FailS1 SCR Sense Fail S1 Gate Drive Fail S2 SCR Sense FailS1 Curr Sense Fail S2 Curr Sense Fail S2 Gate Drive Fail Heat Sink Overtemp S1 UV RMS S1 UVS1 OV S1 Fail S1 OF/UFS2 UV S2 OV S2 UV RMSS2 UF/OF S2 Fail S2 I-PEAK S1 I-PEAK 130 CB5 S1 BYP Closed 132 133 134 135 136 137 Changing the Air Filter Testing the Liebert STS2Maintenance Proper Tightening of Nuts and Bolts Support Information Channel Programmable Relay Board Settings Record Channel PRB Notes Input Contact Isolator Settings Record Page Care Ne tIs t Twor k