User ManualTable of ContentsImportant Safety Instructions9Overview of Manual101.0 Safety Precautions112.0 Unpacking and Inspections122.1 External Inspections122.2 Unloading and Handling122.2.1 Handling Considerations132.2.2 Unit Preparation132.3 Internal Inspections133.0 Location Considerations143.1 Recommended Minimum Service Clearances143.2 Heat Output14Table 1 Heat output143.3 Operating Environment143.4 Altitude15Figure 1 Recommended derating for high altitude operation15Figure 2 Maximum ambient temperature for full load operation at higher altitudes154.0 Locating the Liebert STS2164.1 Leveling and Anchoring the Unit to the Floor164.2 Leveling of the Static Switch Without Anchoring164.3 Leveling and Anchoring the Static Switch Using Floor Stand165.0 Power and Control Wiring175.1 Input And Output Power Connections17Figure 3 Typical static transfer switch one-line diagram18Table 2 Input/output conduit plate specifications185.2 Input Junction Box Installation—Optional18Table 3 Input junction box dimensions19Table 4 Input junction box terminal wire size range195.3 System Grounding20Figure 4 Typical one-line diagram of two PDUs and a static transfer switch205.4 Control Wiring Connections205.5 Remote Source Selection Wiring21Table 5 Remote source selection terminal block215.6 Power Supply21Table 6 Terminal block 1 and terminal block 2 wire connections216.0 Options226.1 Programmable Relay Board22Table 7 Programmable relay board pinout226.2 Optimized Transfer226.3 Distribution Cabinet With I-Line Panelboard—100-600A Units Only236.4 Input Contact Isolator Board236.5 Comms Board236.6 Liebert IntelliSlot® Web/485 Card With Adapter236.7 LED Display246.8 Remote Source Selection246.9 Key Lockout Switch246.10 Redundant Output Breaker246.11 Input Junction Boxes and Cables256.12 Seismic Floor Anchors256.13 Seismic Floor Stand257.0 Installation Drawings26Figure 5 Outline drawing: 100 – 250 amp Liebert STS226Figure 6 Outline drawing: 400 – 600 amp Liebert STS227Figure 7 Outline drawing: 800 – 1000 amp Liebert STS228Figure 8 Outline drawing: 100 – 250amp Liebert STS2 with a key lockout switch option29Figure 9 Outline drawing: 400 – 600 amp Liebert STS2 with a key lockout switch option30Figure 10 Outline drawing: 800 – 1000 amp Liebert STS2 with the key lockout switch option31Figure 11 Seismic anchor drawing: 100 – 250 amp Liebert STS232Figure 12 Seismic anchor drawing: 400 – 600 amp Liebert STS233Figure 13 Seismic anchor drawing: 800 – 1000 amp Liebert STS234Figure 14 Electrical field connections drawing: 100 – 250 amp Liebert STS2 with single output breaker35Figure 15 Electrical field connections drawing: 100 – 250 amp Liebert STS2 with dual output breakers36Figure 16 Electrical field connections drawing: 400 – 600 amp Liebert STS2 with single output breaker37Figure 17 Electrical field connections drawing: 400 – 600 amp Liebert STS2 with dual output breakers38Figure 18 Electrical field connections drawing: 800 – 1000 amp Liebert STS2 with single output breaker39Figure 19 Electrical field connections: 800 – 1000 amp Liebert STS2 with dual output breakers40Figure 20 Liebert STS2 non-automatic circuit breaker schedule41Figure 21 Control connection location diagram: 100 – 600 amp Liebert STS242Figure 22 Control connection location diagram: 800 – 1000 amp Liebert STS243Figure 23 Control wiring for remote source selection option44Figure 24 Control wiring for the programmable relay board option45Figure 25 Control wiring for the input contact isolator board option46Figure 26 Control wiring for comms board47Figure 27 Control wiring for the Liebert IntelliSlot Web/485 Card with Adapater48Figure 28 Control wiring for the RS-232 port49Figure 29 Outline drawing for input junction box50Figure 30 Color LCD touch screen display51Figure 31 LED display52Figure 32 Installation drawing, seismic floor stand 100-250A53Figure 33 Installation drawing, seismic floor stand 100-250A54Figure 34 Installation drawing, seismic floor stand 100-250A55Figure 35 Installation drawing, seismic floor stand 100-250A56Figure 36 Installation drawing, seismic floor stand 400-600A57Figure 37 Installation drawing, seismic floor stand 400-600A58Figure 38 Installation drawing, seismic floor stand 400-600A59Figure 39 Installation drawing, seismic floor stand 400-600A60Figure 40 Installation drawing, seismic floor stand 800-1000A61Figure 41 Installation drawing, seismic floor stand 800-1000A62Figure 42 Installation drawing, seismic floor stand 800-1000A63Figure 43 Installation drawing, seismic floor stand 800-1000A648.0 Introduction to Liebert STS2 Operations658.1 System Description658.1.1 Redundancy658.1.2 Reliability and Agency Requirements668.1.3 Factory Backup and Service Assistance668.2 Modes of Operation668.2.1 Normal (Preferred Source)668.2.2 Transfer668.2.3 Transfer Inhibit668.2.4 Bypass678.3 Operator Controls67Figure 44 Liebert STS2 touch screen display679.0 Theory of Operation689.1 General Description689.1.1 Liebert STS2 Static Transfer Switch689.1.2 Source Transfer689.1.3 Automatic Transfer/Retransfer68Automatic Retransfer Inhibited689.1.4 Emergency Transfer699.1.5 Load Current Transfer Inhibit699.1.6 SCR Failure699.1.7 On/Off Sequence699.2 Detailed Component Description699.2.1 Controls69Operator Interface69Hardware70Firmware709.2.2 Circuit Breakers709.2.3 SCRs709.2.4 Logic Modules719.2.5 Audible Alarm719.2.6 RS-232 Port7110.0 Operating Instructions for the Touch Screen Interface7210.1 Normal System Turn-On73Figure 45 Liebert STS2 touch screen display7310.2 Manual Transfer / Preferred Source Selection74Figure 46 Source transfer screen7410.3 Enabling Remote Source Selection7510.4 Maintenance Bypass75Figure 47 Gate board viewing slot locations7610.4.1 Bypass Procedures for Source 17710.4.2 Bypass Procedures for Source 27810.5 Normal System Shutdown7810.5.1 Shutdown in Static Transfer Switch Mode7810.5.2 Shutdown in Maintenance Bypass Mode7811.0 Alarm and Faults7911.1 Event Mask7911.2 Event and History Logs8011.2.1 Event Log8011.2.2 History Log8011.3 Alarm Notes8111.4 List of Messages81Table 8 Event messages8212.0 Communication Interfaces8412.1 Using the RS-232 Port8412.1.1 Connecting and Using a Terminal85Table 9 Terminal commands8512.1.2 Configuring the Liebert STS2 via the Terminal86Groups Parameter86Item Parameter86Value Parameter87Table 10 Value types87Table 11 Group settings and values8712.1.3 Setting Bitpacked Options with the Terminal89Table 12 Binary-hexadecimal conversions90Putting the Terminal Command Together9112.1.4 Setting Event Masks with the Terminal91Examples of Event Mask Settings9213.0 Liebert STS2 Touch Screen Display9313.1 Display Overview93Figure 48 Liebert STS2 touch screen display9313.2 Menu Overview94Figure 49 Menus94Figure 50 Keyboard and keypad displays9413.2.1 Security95Using the Optional Key Lockout Switch95Figure 51 Key lockout switch.95Using the Password9513.3 Mimic Display9613.4 Event Controls9613.5 Event Display9613.6 Menu bar9613.6.1 Configuration Menu96System Ratings96Event Masks96Figure 52 Event mask dialog box97User Settings97Figure 53 User settings dialog box98Source Set Points98Figure 54 Source setpoints99Table 13 Sepoint parameters99System Settings101Comm Options101Figure 55 Comm options dialog box101Configuring the Modem102Figure 56 Modem dialog box102Configuring Pager Support103Configuring the Input Contact Isolator Settings103Figure 57 Input contact isolator dialog box104Configuring the Programmable Relay Board Settings105Table 14 Standard settings for programmable relays105Figure 58 Programmable relay board dialog box106Configuring the Liebert IntelliSlot Web/485 Card With Adapter106Liebert SiteScan Configuration107Saving Your Communications Configurations107System Options107Figure 59 System options107Dual Output Breaker107PDU1074-Pole Transfer Switch108Shunt108Wye Output Transformer108Remote Source Selection108System ID10813.6.2 Logs109Event Log109Figure 60 Event log109History Log109Figure 61 History log10913.6.3 Source Transfers11013.6.4 Startup Procedure11013.6.5 Bypass Procedure11013.6.6 Help11013.6.7 Logo11013.7 Cleaning the LCD Touch Screen11014.0 Operating the Liebert STS2 LED Display11114.1 LEDs and Buttons and Key Lockout Switch11114.1.1 Front Panel Controls111Figure 62 LED display11114.1.2 LED and Push Button Description112Table 15 LED and push button description11214.1.3 Event Controls11314.1.4 Key Lockout Switch113Figure 63 Key lockout switch.11314.2 Operations11314.2.1 Normal System Turn On11314.2.2 Manual Transfer / Preferred Source Selection11414.2.3 Maintenance Bypass116Bypass Procedures for Source 1116Bypass Procedures for Source 211714.2.4 Normal System Shutdown118Shutdown in Static Transfer Switch Mode118Shutdown in Maintenance Bypass Mode11815.0 Specifications11915.1 System Configuration11915.1.1 Frequency11915.1.2 Input/Output Voltage119Table 16 Input/output voltage11915.1.3 System Current Ratings119Table 17 System current ratings11915.1.4 Grounding12015.1.5 Electrical Requirements120Table 18 Electrical requirements120Table 19 Unit short circuit withstand capability12015.1.6 Input Surge Suppression12015.1.7 Response Time12015.1.8 Environmental Requirements12015.2 System Components12115.2.1 Frame and Enclosure121Table 20 Frame sizes12115.2.2 Casters, Leveling and Seismic Anchoring12115.2.3 Cooling12115.2.4 Access12215.2.5 Circuit Breakers12215.2.6 Cable Entrance12215.2.7 Doors12215.2.8 Color Graphical Display or LED Display12215.2.9 RS-232 Port12315.2.10 Terminal Port Connections123Table 21 MTA plug pinout123Table 22 DB9 pinout12315.2.11 RS-232 Interface Parameters124Table 23 RS-232 settings12415.2.12 Maintenance Bypass12415.2.13 Fuseless Design12415.2.14 Options12416.0 Event Message Help Text12517.0 Maintenance14617.1 Proper Tightening of Nuts and Bolts146Table 24 Torque tightening14617.2 Testing the Liebert STS214617.3 Changing the Air Filter146Support Information147Programmable Relay Board Settings Record148Input Contact Isolator Settings Record150Size: 5.56 MBPages: 152Language: EnglishOpen manual