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Liebert 100-1000A, 1000A 5.3 System Grounding, 5.4 Control Wiring Connections

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Power and Control Wiring

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5.3 System Grounding

Equipment grounding — Grounding is primarily for equipment and personnel safety, although

proper grounding also enhances equipment performance.

All input and output power feeds must include an equipment grounding means as required by the

NEC and local codes.

An insulated equipment ground conductor is recommended to run with each input and output power

feed. The equipment ground conductors should be at least the minimum size conductor per the NEC

based on the upstream overcurrent protection device.

4-Wire-Plus-Ground Systems — When 4-wire-plus-ground input feeds are utilized, the input power

sources must be properly grounded. Because the neutral is not switched by the Liebert STS2, the

neutrals of the two power sources are solidly interconnected. The NEC prohibits grounding a power

source at more than one point. Connecting the neutrals of two grounded power sources together

effectively grounds each of the sources at more than one point, which allows neutral current to flow on

the ground system, defeats ground fault protection, creates a safety hazard, and violates the NEC.

Where possible, the two power sources should be located in close proximity and a single

neutral-to-ground bond made (as shown in Figure 4 on page 12 or as is typical with a double-

ended substation).

Figure 4 Typical one-line diagram of two PDUs and a Liebert STS2

5.4 Control Wiring Connections

No control wiring is needed on the standard Liebert STS2. Only certain options require external

control wiring. See 6.0 - Options on page 14 for details

!

WARNING

If conduit is used as a grounding means, adequate electrical continuity must be maintained at

all conduit connections. The use of isolating bushings with a metal conduit can be a safety

hazard and is not recommended.

SOURCE 2

K1 K3K2 K3

K2K1

225A 225A 225A

225A225A 225A

CB4 CB5

CB2

CB3

STS2

STS1

CB1

SOURCE 1

MICB2MICB1

ISOLATION

TRANSFORMER

ISOLATION

TRANSFORMER

Contents

Main Page TABLE OF CONTENTS 10.0 OPERATING INSTRUCTIONS FOR THE TOUCH SCREEN INTERFACE. . . . . . . . . . . . . . . . . . . .64 Page Page FIGURES TABL ES IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS OVERVIEW OF MANUAL 1.0 SAFETY PRECAUTIONS 2.0 UNPACKING AND INSPECTIONS 2.1 External Inspections 2.2 Unloading and Handling 2.2.1 Handling Considerations 2.2.2 Unit Preparation 2.3 Internal Inspections 3.0 LOCATION CONSIDERATIONS 3.1 Recommended Minimum Service Clearances 3.2 Heat Output 3.3 Operating Environment 3.4 Altitude Ratin g (%) Altitude, Feet (M) Above Sea Level Maximum Amb ient Temperature, F (C) Altitude, Feet (M) Above Sea Level 4.0 LOCATING THE LIEBERT STS2 4.1 Leveling and Anchoring the Unit to the Floor 4.2 Leveling of the Static Switch Without Anchoring 4.3 Leveling and Anchoring the Static Switch Using Floor Stand 5.0 POWER AND CONTROL WIRING 5.1 Input And Output Power Connections 5.2 Input Junction Box InstallationOptional Page 5.3 System Grounding 5.4 Control Wiring Connections 5.5 Remote Source Selection Wiring 5.6 Power Supply 6.0 O 6.1 Programmable Relay Board 6.2 Optimized Transfer 6.3 Distribution Cabinet With I-Line Panelboard100-600A Units Only 6.4 Input Contact Isolator Board 6.5 Comms Board 6.6 Liebert IntelliSlot SNMP/Web/Modbus 485 Card 6.7 LED Display 6.8 Remote Source Selection 6.9 Key Lockout Switch 6.10 Redundant Output Breaker 6.11 Transfer Inhibit Page 7.0 INSTALLATION DRAWINGS Figure 5 Outline drawing: 100 250 amp Liebert STS2 Page Page Figure 8 Outline drawing: 100 250amp Liebert STS2 with a key lockout switch option PS211101 Rev. 02 Page Page Figure 11 Seismic anchor drawing: 100 250 amp Liebert STS2 SYSTEM SEISMIC ANCHORING, FIGURE 1 PS211105 (146 MM) FRONT (107 MM) (256 MM) SYSTEM SEISMIC ANCHORING, FIGURE 1 5.75" (107 MM) FRONT 4.2" (146 MM) SYSTEM SEISMIC ANCHORING, FIGURE 1 PS211805 FRONT Rev. 0 FRONT VIEW FRONT VIEW PEM NUT (WITH FRONT PANELS REMOVED) PS212100 RIGHT SIDE VIEW Page FRONT VIEW PS212400 PEM NUT SECTION A-A (WITH FRONT PANELS REMOVED) Page SECTION A-A PS212800 ONE-LINE DIAGRAM PEM NUT RIGHT SIDE VIEW Page Figure 20 Liebert STS2 non-automatic circuit breaker schedule Figure 21 Control connection location diagram: 100 600 amp Liebert STS2 FRONT VIEW WITH FRONT D OOR R EMOVED CONTROL WIRING Rev. 1 PS213000 OPTION LOCATION DETAIL Figure 22 Control connection location diagram: 800 1000 amp Liebert STS2 CONTROL WIRING PS213800 OPTION LOCATION DETAIL FRONT VIEW WITH FRONT D OOR R EMOVE D Rev. 1 Page Page Figure 25 Control wiring for the input contact isolator board option NO CUSTOMER CONNECTION INPUT CONTACT ISOLATOR BOARD 02-810012-XX J51 PS213002 Rev. 03 Table J51 PS213003 Rev. 02 COMMS BOARD 02-810015-XX Figure 27 Control wiring for the Liebert IntelliSlot SNMP/Web/Modbus 485 card TB3 +- Page INPUT JUNCTION BOX PS211005 Rev. 0 Page Figure 31 LED display ! PS211002 Rev. 0 Figure 32 Installation drawing, seismic floor stand 100-250A PS215000 REV. NO. 0 100-250A STS2 A SEISMIC FLOOR STAND PS215001 Rev. 0 PS215002 Rev. 0. Figure 35 Installation drawing, seismic floor stand 100-250A Figure 36 Installation drawing, seismic floor stand 400-600A PS216000 Rev.0 FRONT VIEW BOTTOM VIEW FOOT DETAIL A FOOT DETAIL B PS216001 Rev. 0 PS216002 Rev. 0 Figure 39 Installation drawing, seismic floor stand 400-600A PS216003 Rev. 0 Figure 40 Installation drawing, seismic floor stand 800-1000A PS217000 Rev. 0 A B HARDWARE TORQUE CHART 523411G1 30.0" 31.25" 28.75" Figure 41 Installation drawing, seismic floor stand 800-1000A PS217001 Rev. 0 Page Figure 43 Installation drawing, seismic floor stand 800-1000A PS217003 Rev. 0 8.0 INTRODUCTION TO LIEBERT STS2 OPERATIONS 8.1 System Description 8.1.1 Redundancy 8.1.2 Reliability and Agency Requirements 8.1.3 Factory Backup and Service Assistance 8.2 Modes of Operation 8.2.1 Normal (Preferred Source) 8.2.2 Transfer 8.2.3 Transfer Inhibit 8.2.4 Bypass 8.3 Operator Controls 9.0 THEORY OF OPERATION 9.1 General Description 9.1.1 Liebert STS2 Static Transfer Switch 9.1.2 Source Transfer 9.1.3 Automatic Transfer/Retransfer 9.1.4 Emergency Transfer 9.1.5 Load Current Transfer Inhibit 9.1.6 SCR Failure 9.1.7 On/Off Sequence 9.2 Detailed Component Description 9.2.1 Controls Operator Interface Hardware Firmware Page 10.0 OPERATING INSTRUCTIONS FOR THE TOUCH SCREEN INTERFACE 10.1 Normal System Startup 10.2 Manual Transfer / Preferred Source Selection 10.3 Enabling Remote Source Selection 10.4 Maintenance Bypass Figure 47 Gate board viewing slot locations 10.4.1 Bypass Procedures for Source 1 10.4.2 Bypass Procedures for Source 2 10.5 Normal System Shutdown 10.5.1 Shutdown in Static Transfer Switch Mode 10.5.2 Shutdown in Maintenance Bypass Mode 11.0 ALARM AND FAULTS 11.1 Event Mask 11.2 Event and History Logs 11.2.1 Event Log 11.2.2 History Log 11.3 Alarm Notes 11.4 List of Messages Table 8 Event messages Table 8 Event messages (continued) 12.0 COMMUNICATION INTERFACES 12.1 Using the RS-232 Port 12.1.1 Connecting and Using a Terminal 12.1.2 Configuring the Liebert STS2 via the Terminal Groups Parameter Item Parameter Value P arame ter Table 11 shows the various groups, the settings contained within, and the type of value it requires. Table 10 Value types Table 11 Group settings and values Table 11 Group settings and values (continued) 12.1.3 Setting Bitpacked Options with the Terminal Page Putting the Terminal Command Together 12.1.4 Setting Event Masks with the Terminal Examples of Event Mask Settings 13.0 LIEBERT STS2 TOUCH SCREEN DISPLAY 13.1 Display Overview 13.2 Menu Overview 13.2.1 Security Using the Optional Key Lockout Switch Using the Password 13.3 Mimic Display 13.4 Event Controls 13.5 Event Display 13.6 Menu Bar 13.7 Configuration Menu 13.7.3 User Settings Source Set Points Page Page 13.7.4 System Settings 13.8 Comm Options 13.8.1 Configuring the Modem 13.8.2 Configuring Pager Support 13.8.3 Configuring the Input Contact Isolator Settings 13.8.4 Configuring the Programmable Relay Board Settings 13.8.5 Configuring the Liebert IntelliSlot SNMP/Web/Modbus 485 Card 13.8.6 Liebert SiteScan Configuration 13.8.7 Saving Your Communications Configurations 13.9 System Options Dual Output Breaker PDU 4-Pole Transfer Switch Shunt 13.10 System ID 13.11 Logs 13.11.1Event Log 13.11.2History Log 13.12 Source Transfers 13.13 Startup Procedure 13.14 Bypass Procedure 13.15 Help 13.16 Logo 14.0 OPERATING THE LIEBERT STS2 LED DISPLAY 14.1 LEDs and Buttons and Key Lockout Switch 14.1.1 Front Panel Controls ! Rev. 0 14.1.2 LED and Push Button Description 14.1.3 Event Controls 14.1.4 Key Lockout Switch 14.2 Operations 14.2.1 Normal System Startup 14.2.2 Manual Transfer / Preferred Source Selection 14.2.3 Maintenance Bypass Bypass Procedures for Source 1 Bypass Procedures for Source 2 14.2.4 Normal System Shutdown Shutdown in Static Transfer Switch Mode Shutdown in Maintenance Bypass Mode 15.0 S 15.1 System Configuration 15.1.1 Frequency 15.1.2 Input/Output Voltage 15.1.3 System Current Ratings 15.1.4 Grounding 15.1.5 Electrical Requirements 15.1.6 Input Surge Suppression 15.1.7 Response Time 15.1.8 Environmental Requirements 15.2 System Components 15.2.1 Frame and Enclosure 15.2.2 Casters, Leveling and Seismic Anchoring 15.2.3 Cooling 15.2.4 Access 15.2.5 Circuit Breakers 15.2.6 Cable Entrance 15.2.7 Doors 15.2.8 Color Graphical Display or LED Display 15.2.9 RS-232 Port 15.2.10 Terminal Port Connections 15.2.11 RS-232 Interface Parameters 15.2.12 Maintenance Bypass 15.2.13 Fuseless Design 15.2.14 Options 16.0 EVENT MESSAGE HELP TEXT Key: Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 17.0 M 17.1 Proper Tightening of Nuts and Bolts 17.2 Testing the Liebert STS2 17.3 Changing the Air Filter SUPPORT INFORMATION PROGRAMMABLE RELAY BOARD SETTINGS RECORD Page I NPUT C ONTACT I SOLATOR S ETTINGS R Page Ensuring The High Availability Of Mission-Critical Data And Applications.