User manual

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AC Power

For Business-Critical Continuity™

Liebert

Static Transfer Switch 2

™

User Manual–100-1000A, 50/60Hz

Summary of content (152 pages)

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AC Power For Business-Critical Continuity™ Liebert® Static Transfer Switch 2™ User Manual–100-1000A, 50/60Hz
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 OVERVIEW OF MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.0 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.0 UNPACKING AND INSPECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 8.0 INTRODUCTION TO LIEBERT STS2 OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 8.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 8.1.1 8.1.2 8.1.3 8.2 Redundancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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12.0 COMMUNICATION INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76 12.1 Using the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 12.1.1 12.1.2 12.1.3 12.1.4 Connecting and Using a Terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuring the Liebert STS2 via the Terminal . . . . . . . . . . . . . . . . . . . . . . . .
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15.2 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 15.2.1 Frame and Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2.2 Casters, Leveling and Seismic Anchoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.2.3 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Recommended derating for high altitude ope
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Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Liebert STS2 touch screen display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Keyboard and keypad displays. . . . . . . . . . . . . . . . .
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during the installation and maintenance of the Liebert Static Transfer Switch 2 (STS2). ! WARNING The unit is supplied by more than one power source. The unit contains hazardous voltages if any of the input sources are ON, even when the unit is in bypass. To isolate the unit, turn OFF and lock out ALL input power sources.
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OVERVIEW OF MANUAL The Liebert STS2 Installation, Operation and Maintenance Manual is organized in a logical progression so that you can follow the procedures, in the order provided to get your Liebert STS2 installed and running. Read the entire manual before proceeding with the unpacking and installation of the Liebert STS2. The major sections are as follows: Important Safety Instructions—review the instructions on the previous page before proceeding.
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Safety Precautions 1.0 SAFETY PRECAUTIONS Read this manual thoroughly before working with the static transfer switch. Be sure to review the warning under Important Safety Instructions on page 1. Refer to the Handling Considerations on page 5 before attempting to move the unit. Under typical operation and with the doors closed, only normal safety precautions are necessary. The area around the static transfer switch should be kept free from puddles of water, excess moisture and debris.
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Unpacking and Inspections 2.0 UNPACKING AND INSPECTIONS NOTE Read the entire manual before installing and operating the unit. Upon receipt of the Liebert Static Transfer Switch2, the installer should perform the following steps to assure a high-quality installation. A high-quality installation begins on the receiving dock. The Liebert STS2 and its packaging should be inspected when the unit is delivered.
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Unpacking and Inspections 2.2.1 Handling Considerations The static switch is bolted to a wooden shipping pallet to allow handling by forklift equipment or a pallet jack. Easily Moved — The unit is furnished with integral castors that allow the unit to be rolled into place after it has reached its location and is removed from the pallet. ! WARNING Exercise extreme care when handling static switch cabinets to avoid equipment damage or injury to personnel.
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Location Considerations 3.0 LOCATION CONSIDERATIONS The Liebert STS2 should be placed in a clean, cool and dry location. The Liebert STS2 requires only front access for installation and maintenance. Back or side access is not required. Adequate space is required above the unit for conduit (if configured as such) and cooling air flow. This section provides specific information for these considerations.
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Location Considerations 3.4 Altitude The standard units are designed for full load operation up to 4000 feet (1200 m) above sea level. See Figure 1 for recommended deratings for altitudes greater than 4000 feet (1200 m).
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Locating the Liebert STS2 4.0 LOCATING THE LIEBERT STS2 This section provides instructions for leveling the Liebert STS2 and anchoring the unit to the floor, should that be required. For leveling feet details, see Figures 5 through 10. 4.1 Leveling and Anchoring the Unit to the Floor The Liebert STS2 can be anchored to the concrete floor to ensure stability for the unit in the event of seismic activity.
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Power and Control Wiring 5.0 POWER AND CONTROL WIRING All power and control wiring should be installed by a qualified electrician. All power and control wiring must comply with the NEC and applicable local codes. Unless otherwise labeled, use the recommended tightening torque as shown in Table 24 - Torque tightening. The busbars are accessible through the front of the Liebert STS2 and designed to allow one-handed tightening.
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Power and Control Wiring Figure 3 Typical static transfer switch one-line diagram SOURCE 2 SOURCE 1 CB1 STS1 STS2 K2 K1 K2 K3 CB2 CB3 CB4 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.
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Power and Control Wiring For preparation purposes, the following tables provide the dimensions and wire sizes for the input junction boxes.
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Power and Control Wiring 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.
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Power and Control Wiring 5.5 Remote Source Selection Wiring An optional Remote Source Selection board may be installed in your Liebert STS2. This board is installed in the same bay as the communications options. See Figures 21 and 22 for the location of these options. See Figure 23 for information on the control wiring for the Remote Source Selection option. The Remote Source Selection allows you choose the preferred input source from a remote location.
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Options 6.0 OPTIONS This section discusses the options available for the Liebert STS2. The communications options are also discussed in 12.0 - Communication Interfaces. 6.1 Programmable Relay Board The Programmable Relay Board (PRB) provides a means to trigger an external device when an event occurs in the Liebert STS2. Each PRB has eight channels. Each channel has two sets of Form-C dry contacts, rated 1 Amp @ 30 VDC or 250 mAmp @ 125VAC. Any alarm/event can be programmed to any channel or channels.
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Options 6.3 Distribution Cabinet With I-Line Panelboard—100-600A Units Only A distribution cabinet with a Square D I-Line panelboard offers space to plug in up to 10 three-pole branch circuit breakers (100A-250A). The panelboard is rated at 600A with an overall short-circuit rating of 100,000 AIC.
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Options 6.7 LED Display A light-emitting diode display is available to replace the standard liquid crystal display touch screen control. The display provides monitoring and control throuh a series of LEDs and buttons. LEDs alert you when a problem occurs. A PC running terminal emulation software connected to the RS-232 port is needed to access the data and configuration settings. 6.
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Options 6.11 Input Junction Boxes and Cables Two input power junction boxes and interconnecting cables provide under floor connection for the two input power feeds. Power terminal blocks are provided in each junction box for the connection of the input power conductors and a parity-sized ground conductor. The junction boxes are NEMA 1 enclosures. A main input cable assembly is provided for connection between the unit and the junction box.
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Installation Drawings 7.0 INSTALLATION DRAWINGS Figure 5 Outline drawing: 100 – 250 amp Liebert STS2 30" (762) Center Of Gravity 77" (1956) 32.1" (815) Center Of Gravity 36.7" (932) 18.8 (477) 19.2" (488) 23.4" (594) Caster Centers 8.4 (213) 24.4" (620) 11.1 (280) 4.6 (116) 29" (736) (12mm centers) 9.4 (238) 21.6" (548) Caster Centers 21.5 (546) 24.4 (619) 13.5" (343) 12.8" (326) .47" (12) centers 29.8" (756) 5.1 (130) Notes: 1. All dimensions are in inches and (millimeters). 2.
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Installation Drawings Outline drawing: 400 – 600 amp Liebert STS2 PS211400 Rev.
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Installation Drawings Outline drawing: 800 – 1000 amp Liebert STS2 PS211800 Rev.
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Installation Drawings Figure 8 Outline drawing: 100 – 250amp Liebert STS2 with a key lockout switch option Notes: 1. All dimensions are in inches and (millimeters). 2. 18" (457mm) min. clearance above unit required for air exhaust. 3. Clearance of 36" (914mm) minimum is required in the front for installation and service access. 4. Heat output: 2710 btu/hr (0.80 kW/hr) max. for 100A switch. 4680 btu/hr (1.37 kW/hr) max. for 250A switch. 5. Weight: 780 lb. (354 kg) 6.
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Installation Drawings Outline drawing: 400 – 600 amp Liebert STS2 with a key lockout switch option PS211401 Rev.
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Installation Drawings PS211801 Rev.
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(832 MM) 32.75" SEE NOTE (7) FOR SPACING (107 MM) 4.2" 24 TOP VIEW (256 MM) 10.1" FRONT (146 MM) 5.75" REAR FLOOR BRACKET SEE NOTE (2) FOR SPACING BACK WALL (107 MM) 4.2" (335 MM) 13.2" 4. INSTALL FRONT CABINET BASE BRACKET (FIG. 3) TO EXISTING HOLES ON UNDERSIDE OF UNIT WITH BENT FLANGE FACING FRONT. USE SUPPLIED HARDWARE AND TORQUE TO 365 LB-INCH (41.2 Nm). NOTE, LOOSEN LEVELING BOLT LOCKING NUT AND TIGHTEN AFTER BRACKET IS SECURED. 3. INSTALL REAR CABINET BASE BRACKET (FIG.
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(832 MM) 32.75" SEE NOTE (7) FOR SPACING 25 TOP VIEW (462 MM) 18.2" FRONT (335 MM) 13.2" (107 MM) 4.2" (146 MM) 5.75" REAR FLOOR BRACKET SEE NOTE (2) FOR SPACING BACK WALL 4. INSTALL FRONT CABINET BASE BRACKET (FIG. 3) TO EXISTING HOLES ON UNDERSIDE OF UNIT WITH BENT FLANGE FACING FRONT. USE SUPPLIED HARDWARE AND TORQUE TO 365 LB-INCH (41.2 Nm). NOTE, LOOSEN LEVELING BOLT LOCKING NUT AND TIGHTEN AFTER BRACKET IS SECURED. 3. INSTALL REAR CABINET BASE BRACKET (FIG.
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SIDE WALL 26 (107 MM) 4.2" (335 MM) 13.2" (107 MM) 4.2" (289 MM) 11.4" TOP VIEW (107 MM) 4.2" (396 MM) 15.6" 4. INSTALL FRONT CABINET BASE BRACKET (FIG. 3) TO EXISTING HOLES ON U NDERSIDE OF UNIT WITH BENT FLANGE FACING FRONT. USE SUPPLIED HARDWARE AND TORQUE TO 365 LB-INCH (41.2 Nm). NOTE, LOOSEN LEVELING BOLT LOCKING NUT AND TIGHTEN AFTER BRACKET IS SECURED. 3. INSTALL REAR CABINET BASE BRACKET (FIG. 2) TO EXISTING HOLES ON UNDERSIDE OF UNIT WITH TABS FACING BACK WALL.
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27 GROUND BUS FRONT VIEW (WITH FRONT PANELS REMOVED) FRONT SYSTEM OUTPUT Ø A, Ø B, Ø C CB3 CB5 CB4 SOURCE 2 INPUT Ø A, Ø B, Ø C SOURCE 1 INPUT Ø A, Ø B, Ø C CB2 NEUTRAL BUS PEM NUT SIDE VIEW CB3 PS212100 Rev. 3 ONE-LINE DIAGRAM SYSTEM OUTPUT K1 K3 K2 K1 CB4 CB2 CB1 CB5 SOURCE 2 7. THE TORQUE REQUIREMENT FOR 1/2"-13 PEM NUTS IS 428 INCH-LBS. (48 N-m). 6. HARDWARE KIT IS SUPPLIED FOR INPUT, OUTPUT, NEUTRAL, AND GROUND CABLE CONNECTIONS.
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Installation Drawings PS212101 Rev.
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29 NEUTRAL BUS CB4 CB1 .51 DIA. GROUND BUS PEM NUT CB3 FRONT SYSTEM OUTPUT Ø A, Ø B, Ø C CB5 CB2 SOURCE 2 INPUT Ø A, Ø B, Ø C SOURCE 1 INPUT Ø A, Ø B, Ø C INPUT/OUTPUT BUS RIGHT SIDE VIEW (WITH FRONT PANELS REMOVED) FRONT VIEW GROUND BUS FRONT VIEW SIDE VIEW SECTION A-A NEUTRAL BUS RIGHT SIDE VIEW K2 K3 SYSTEM OUTPUT CB3 CB5 SOURCE 2 K1 K3 K2 CB2 PS212400 Rev. 2 ONE-LINE DIAGRAM K1 CB4 SOURCE 1 NEUTRAL BUS SOURCE 1 INPUT Ø C SOURCE 1 INPUT Ø B CB1 7.
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Installation Drawings PS212401 Rev.
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31 FRONT VIEW CB1 .51 DIA. SOURCE 1 INPUT Ø A, Ø B, Ø C INPUT/OUTPUT BUS RIGHT SIDE VIEW (WITH FRONT PANELS REMOVED) CB4 GROUND BUS FRONT VIEW PEM NUT NEUTRAL BUS FRONT CB3 SYSTEM OUTPUT Ø A, Ø B, Ø C GROUND BUS CB5 CB2 SOURCE 2 INPUT Ø A, Ø B, Ø C SIDE VIEW SECTION A-A NEUTRAL BUS RIGHT SIDE VIEW .51 DIA. K2 K3 SYSTEM OUTPUT CB3 CB5 SOURCE 2 K1 K3 K2 CB2 PS212800 Rev.
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Installation Drawings PS212801 Rev.
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Installation Drawings Figure 20 Liebert STS2 non-automatic circuit breaker schedule Liebert STS2 Ampere Rating, A Vendor Type Ampacity, A Voltage Withstand Current 100 Square D HL 150 200-240V 380-480V 600V 125K 100K 50K 250 Square D JL 250 200-240V 380-480V 600V 125K 100K 50K 400 Merlin Gerin NSJ 400 200-240V 380-480V 600V 100K 100K 25K 600 Merlin Gerin NSJ 600 200-240V 380-480V 600V 100K 100K 25K 800 Square D PJ 800 200-240V 380-480V 600V 100K 65K 25K 1000 Square D P
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34 FRONT VIEW WITH FRONT DOOR REMOVED CONTROL WIRING OPTION LOCATION DETAIL SEE OPTION LOCATION DETAIL PS213000 Rev. 2 COMMS BOARD FOR LIEBERT SITESCAN, EXTERNAL MODEM INTERFACE OPTION Liebert IS-WEB/485 Card (Option) INPUT CONTACT ISOLATOR BOARD (OPTION) OR PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 REMOTE SOURCE SELECT (OPTION) 2. MAXIMUM OF TWO (2) PROGRAMMABLE RELAY BOARDS CAN BE USED. 1.
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35 CONTROL WIRING FRONT VIEW WITH FRONT DOOR REMOVED SEE OPTION LOCATION DETAIL OPTION LOCATION DETAIL PS213800 Rev. 1 COMMS BOARD FOR LIEBERT SITESCAN, EXTERNAL MODEM INTERFACE (OPTION) INPUT CONTACT ISOLATOR BOARD (OPTION) OR PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 Liebert IS-WEB/485 Card (Option) PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 PROGRAMMABLE RELAY BOARD (OPTION) SEE NOTE 2 REMOTE SOURCE SELECT (OPTION) 2. MAXIMUM OF TWO (2) PROGRAMMABLE RELAY BOARDS CAN BE USED. 1.
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Installation Drawings Figure 23 Control wiring for remote source selection option See Note 1 Source 1 Preferred Source 2 Preferred S1 GND S2 GND 1 2 3 4 5 6 TB50 Remote Source Selection NOTES 1. Customer-provided normally open dry contacts. Rating 10mA at 30VDC. 2. Maximum cable length 500 ft. (152m) with #16 AWG, 300V minimum flexible stranded cable. 3. All control wiring (by others) must be run separate from power wiring . Control wiring runs should not be combined in the same conduit. 4.
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J74 37 CH8 CH7 CH6 CH5 CH4 CH3 CH2 2 5 8 11 14 2 5 8 11 14 2 5 8 11 14 2 NC NOTE: PIN 16 NOT USED ON J71, J72, & J73 J74 J73 J72 J71 1 4 7 10 13 1 4 7 10 13 1 4 7 10 13 1 1-3 4-6 7-9 10 - 12 13 - 15 1-3 4-6 7-9 10 - 12 13 - 15 1-3 4-6 7-9 10 - 12 13 - 15 1-3 A B A B A B A B A B A B A B A B CH1 C CHANNEL PIN NO.
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Installation Drawings Figure 25 Control wiring for the input contact isolator board option “NO CUSTOMER CONNECTION” 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 J51 INPUT CONTACT ISOLATOR BOARD 02-810012-XX Table J51 Input Contact 1 2 3 4 5 6 7 8 Pin No. 1 2 3 4 5 6 PS213002 Rev. 02 NOTES: 1. Customer control wiring connection points are Terminals 1 through 16 (see Table J51). 2. Customer-provided, normally open, dry contacts for user alarm messages. 3.
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Installation Drawings Figure 26 Control wiring for comms board EXTERNAL MODEM SEE DETAIL A J81 J1A TB51 TB55 TB56 “NO CUSTOMER CONNECTION” LIEBERT SITESCAN SEE DETAIL B “NO CUSTOMER CONNECTION” COMMS BOARD 02-810015-XX CUSTOMER-SUPPLIED INTERCONNECTING CABLE TO LIEBERT SITESCAN SEE NOTE 2 SEE NOTES 1 & 2 DCD RX TX DTR GND DSR RTS CTS RI CUSTOMER-SUPPLIED INTERCONNECTING CABLE TO EXTERNAL MODEM 1 2 3 4 5 6 7 8 9 1 J81 DETAIL A 2 3 TB 55 DETAIL B NOTES 1.
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40 TB1 RS-232 (DB-9 connector) for setup only. Uses standard computer serial port cable No customer connection DB-9 TB2 12 3 +- See Note 2 J3 Customer-supplied interconnection cable to Modbus TB3 TB3 No customer connection Customer-Supplied Interconnection Cable PS213008 Rev. 01 Ethernet Network RF-45 Connector See Notes 1 and 2 Notes: 1. Wire size and type: 10/100 base-T ethernet cable with RJ-45 plug connector. The length is limited by internet standards. 2.
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Installation Drawings Figure 28 Control wiring for the RS-232 port See Detail A NOTES 1. RS-232 communication through DB9 connector . 2. Connector accessible with front door open . Connector must be removed before closing door . LCD DISPLAY 6 7 8 9 1 2 3 4 5 TXD RXD GND DB9 Connector Detail A Front View PS213006 Rev.
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Installation Drawings Figure 29 Outline drawing for input junction box Power Terminal Block Recommended Location for Customer Connection of Input Power Raceway (by others) 3-Phase, 3-Wire Plus Ground Location of Factory-Supplied Input Power Cable Assembly A B C G INPUT JUNCTION BOX G Diameter hole B H E A D C PS211005 Rev. 0 NOTES: 1. Two junction boxes are supplied, one for each input. 2. Cable(s) are factory-supplied to connect the junction box to the input busbars.
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EVENT DISPLAY ALARM CONTROLS MIMIC 43 SILENCE CONFIG LOGS AMBIENT OVERTEMP EQUIPMENT OVERTEMP HEATSINK OVERTEMP S2 SCR OPEN S1 SCR OPEN S2 SCR SHORT SI SCR SHORT RESET ALTERNATE PREFERRED CB2 CB1 SO URCE XFERS 0 OUTPUT 70 KVA 70 KW 80% LOAD 0 XFERS CB5 CB3 STARTUP PROC. SOURCE 1 BYP. PRO C. HELP SOURCE 2 SOURCE 1 LEADS SOURCE 2 BY 3.5 DEGREES -30 SOURCE 2 A-B B-C C-A 195V 195V 195V 0A 0A 0A 0.0 HZ SO URCE 1 A-B B-C C-A 208V 208V 208V 200A 200A 200A 60.
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Installation Drawings Figure 31 LED display (E) (A) 1 4 (H) (C) 1 3 (G) (J) 3A 2 (B) 2 (D) (F) 5 (L) ! (K) (M) (N) PS211002 Rev.
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45 29.44" TYP. 6" TYP. 2.47" TYP. .625" DIA x 2 TYP. SEE HEIGHT TABLE 36.9" A BOTTOM VIEW 17.48" TYP. FRONT VIEW TOP VIEW 29.9" 2.47" TYP B 53 FT -LBS M12 - 1.75 HEIGHT 18.0" 24.0" 30.0" 36.0" P/N OF FLOOR STAND: 523401G1 523402G1 523403G1 523404G1 34.75" 16.75" 22.75" 28.75" HEIGHT MIN: PS215000 REV. NO. 0 37.25" 19.25" 25.25" 31.25" HEIGHT MAX: HEIGHT TABLE 16FT - LBS 31 FT - LBS M10 - 1.5 320 FT - LBS M8 - 1.25 1.0" NUT HARDWARE TORQUE CHART 6.
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REAR UPPER STS2 BRACKET (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (SEE DETAIL C) FRONT UPPER STS2 BRACKET 46 INSTALLATION DRAWING FOR SEISMIC FLOOR STAND 100-250A STS2 (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 REAR LOWER STS2 BRACKET FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET FRONT REAR FIG.
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47 FIG. 3 RIGHT SIDE VIEW FIG. 1 FRONT LEFT ISOMETRIC VIEW A 2 PLACES DETAIL A PS215002 Rev. 0. LOWER FRONT BRACKET (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 FIG. 2 REAR RIGHT ISOMETRIC VIEW UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS REAR LOWER STS2 BRACKET REAR UPPER STS2 BRACKET SEE DWGS PS215000, PS215001, AND PS215003 FOR DETAILS.
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77.0" FRONT VIEW 30.0" RAISED FLOOR ISOMETRIC VIEW RIGHT SIDE VIEW 32.1" PS215003 Rev. 0 SEE DWGS PS215000, PS215001, AND PS215002 FOR DETAILS.
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49 6" TYP. 29.44" TYP. .625" DIA x 2 TYP. 36.9" A BOTTOM VIEW 25.59" TYP. FRONT VIEW TOP VIEW 38" FRONT SIDE 2.47" TYP FOOT DETAIL B ALIGN FOOT PARALLEL TO MOUNTING PLATE AS SHOWN B MOUNTING PLATE 2.47" TYP SEE HEIGHT TABLE FOOT DETAIL A NUT NUT B JAM NUT ISOMETRIC VIEW #1 53 FT -LBS M12 - 1.75 HEIGHT 18.0" 24.0" 30.0" 36.0" P/N OF FLOOR STAND: 523405G1 523406G1 523407G1 523408G1 16.75" 22.75" 28.75" 374.75" PS216000 Rev.0 25.25" 31.25" 37.25" 19.
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REAR UPPER STS2 BRACKET (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (SEE DETAIL C) FRONT UPPER STS2 BRACKET 50 REAR LOWER STS2 BRACKET FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET FRONT REAR (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 FIG.
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51 FIG. 3 RIGHT SIDE VIEW FIG. 1 FRONT LEFT ISOMETRIC VIEW A 2 PLACES DETAIL A LOWER FRONT BRACKET (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 PS216002 Rev. 0 (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 FIG. 2 REAR RIGHT ISOMETRIC VIEW UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS REAR LOWER STS2 BRACKET REAR UPPER STS2 BRACKET SEE DWGS PS216000, PS216001, AND PS216003 FOR DETAILS.
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77.0" FRONT VIEW 38" RAISED FLOOR 52 ISOMETRIC VIEW RIGHT SIDE VIEW 32.1" PS216003 Rev. 0 SEE DWGS PS216000, PS216001, AND PS216002 FOR DETAILS.
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53 29.44" TYP. 6" TYP. 2.47" TYP. SEE HEIGHT TABLE 36.9" A BOTTOM VIEW ALIGN FOOT PARALLEL TO MOUNTING PLATE AS SHOWN MOUNTING PLATE 71.55" TYP. FRONT VIEW TOP VIEW 83.9" 2.47" TYP NUT JAM NUT NUT 53 FT -LBS M12 - 1.75 18.0" 24.0" 30.0" 36.0" 523409G1 523410G1 523411G1 523412G1 HEIGHT P/N OF FLOOR STAND: 19.25" 25.25" 31.25" 37.25" 16.75" 22.75" 28.75" 34.75" HEIGHT MAX: HEIGHT MIN: HEIGHT TABLE 16FT - LBS 31 FT - LBS M10 - 1.5 320 FT - LBS 1.0" NUT M8 - 1.25 B PS217000 Rev.
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FRONT REAR REAR SIDE REAR UPPER STS2 BRACKET FRONT UPPER STS2 BRACKET FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET REAR LOWER STS2 BRACKET FIG. 1 BOTTOM VIEW OF STS2 WITH UPPER BRACKETS FRONT (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 (2 PLACES) CAP SCREW M12-1.
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A 55 FIG. 3 RIGHT SIDE VIEW FIG. 1 FRONT RIGHT ISOMETRIC VIEW 4 PLACES DETAIL A LOWER FRONT BRACKET (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASHER M12 PS217002 Rev. 0 (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 FIG. 2 REAR RIGHT ISOMETRIC VIEW UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS RIGHT REAR LOWER STS2 BRACKET RIGHT REAR UPPER STS2 BRACKET NOTE: SEE DWGS PS217000, PS217002, AND PS217003 FOR DETAILS.
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77.0" 32" FRONT VIEW 84" 52" RAISED FLOOR 56 ISOMETRIC VIEW PS217003 Rev. 0 SEE DWGS PS217000, PS217001, AND PS217002 FOR DETAILS. NOTE: RIGHT SIDE VIEW 32.
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Introduction to Liebert STS2 Operations 8.0 INTRODUCTION TO LIEBERT STS2 OPERATIONS 8.1 System Description A Liebert STS2 provides an automatic, seamless transfer between input power sources to an output load. The Liebert STS2 monitors the input sources, to ensure each source is operating within set parameters, as well as ensure that each source is within acceptable tolerances for a transfer between sources to be completed.
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Introduction to Liebert STS2 Operations 8.1.2 Reliability and Agency Requirements The Liebert STS2 is designed for high reliability and high availability with a critical bus Mean Time Between Failure (MTBF) exceeding 1,000,000 hours.
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Introduction to Liebert STS2 Operations 8.2.4 Bypass 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.
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Theory of Operation 9.0 THEORY OF OPERATION 9.1 General Description The Liebert STS2 contains all the equipment necessary to prevent an interruption in power flow to the AC load, should your primary source fail. 9.1.1 Liebert STS2 Static Transfer Switch The Liebert STS2 is a 3-pole, double-throw, solid state automatic transfer switch that is fed from two sources. The Preferred source is the input source that normally carries the load when both sources are available.
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Theory of Operation 9.1.4 Emergency Transfer To ensure that power remains connected to the load, the Liebert STS2 automatically performs an emergency transfer from one input source to the other when an outage occurs on the existing source. The automatic transfer takes place if the other source’s voltage is within acceptable limits, and regardless of the phase difference between the two sources. Emergency transfers occur with a loss of power on the output of less than 4 ms.
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Theory of Operation Hardware • The Liebert STS2 operator interface in the Color Graphical Display unit is designed to provide all of the information required to configure and monitor the unit’s operation. • The control logic performs automatic operations with minimal operator interface. • Each Liebert STS2 unit is equipped with either a color LCD touch screen or a panel of LEDs and push buttons. • The Liebert STS2 can have optional communication ports installed. See 6.0 - Options and 12.
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Theory of Operation 9.2.4 Logic Modules The logic contains three separate redundant logic modules. The modules contain the logic necessary to run the Liebert STS2 and control transfers and shunt trips under all circumstances, without any outside assistance once set-up and started properly. 9.2.5 Audible Alarm An audible alarm is installed on the control board. This alarm is triggered by an alarm condition detected on the unit.
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Operating Instructions for the Touch Screen Interface 10.0 OPERATING INSTRUCTIONS FOR THE TOUCH SCREEN INTERFACE ! CAUTION Before the unit is placed into service for the first time, after equipment relocation, or after the equipment has been de-energized for an extended period of time, a thorough equipment inspection and supervised startup by qualified personnel are strongly recommended.
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Operating Instructions for the Touch Screen Interface 10.1 Normal System Turn-On NOTE If your Liebert STS2 is connected to a PDU with a Wye configuration, enable the Wye Output Transformer before starting the system. This setting can be made from the touch screen. Refer to Wye Output Transformer on page 100 for instructions. 1. Ensure that all Liebert STS2 breakers—CB1, CB2, CB3, CB3A (if supplied), CB4, and CB5—are in the OFF position. a.
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Operating Instructions for the Touch Screen Interface 10.2 Manual Transfer / Preferred Source Selection The Source Transfer option (Source Xfers) in the touch screen menu allows you to select a preferred source. Transfers are only permitted when the voltage and current are within their proper operating range and the sources are synchronized. The Source Transfer screen indicates the synchronization between the two sources, while the voltage and frequency are displayed on the Mimic. See Figure 46.
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Operating Instructions for the Touch Screen Interface To manually select the preferred source: 1. Verify that the input breakers CB1 and CB2 are closed. 2. Select SOURCE XFERS from the menu bar. The Select Preferred Source screen is displayed in the Event Display. 3. Check the Mimic to verify that Source 1 and Source 2 input voltages are correct. 4. Select SOURCE 1 or SOURCE 2 as your preferred source.
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Operating Instructions for the Touch Screen Interface Figure 47 Gate board viewing slot locations Touch Screen Viewing Slot for the Source 1 Gate Drive Board Viewing Slot for the Source 2 Gate Drive Board GREEN LEDS ON THE GATE DRIVER BOARD ARE VIEWABLE THROUGH THIS SLOT INDICATE THAT THE STS IS ON SOURCE 1 GREEN LEDS ON THE GATE DRIVER BOARD ARE VIEWABLE THROUGH THIS SLOT INDICATE THAT THE STS IS ON SOURCE 1 GREEN LEDS ON THE GATE DRIVER BOARD ARE VIEWABLE THROUGH THIS SLOT INDICATE THAT THE STS IS ON
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Operating Instructions for the Touch Screen Interface 10.4.1 Bypass Procedures for Source 1 To bypass the switch for Source 1: NOTE If you wish to bypass the Source 1 static transfer switch but Source 2 is presently active, you must first transfer to Source 1. See Manual Transfer / Preferred Source Selection on page 66. 1. Verify Source 1 is supplying power via the Mimic. • If the Color Graphical Display is not available, check the gate driver board LEDs through the slots in the control panel.
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Operating Instructions for the Touch Screen Interface 10.4.2 Bypass Procedures for Source 2 To bypass the switch for Source 2: NOTE To bypass the Source 2 static transfer switch when Source 1 is presently active, you must first transfer to Source 2. See Manual Transfer / Preferred Source Selection on page 66. 1. Verify Source 2 is supplying power via the Mimic. • If the Color Graphical Display is not available, check the gate driver board LEDs through the slots in the control panel. See Figure 47. 2.
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Alarm and Faults 11.0 ALARM AND FAULTS Alarms and faults are events that are triggered when the operation of the static transfer switch falls outside the defined parameters. These events can also be triggered by: user actions, such as changing configurations, clearing logs, etc.; failed components such as a fan failure, an SCR that is open or closed, etc.; and system status, such as open circuit breakers, load on alternate source, etc.
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Alarm and Faults 11.2 Event and History Logs The system tracks events through the Events Log and tracks significant events through the History Logs. These logs allow you to quickly spot trends or diagnose problems that the unit may have had. Both logs are written in nonvolatile memory. The logs can be accessed from the touch screen menu or the RS-232 port. See 13.6.2 - Logs for more instructions on viewing the logs from the touch screen.
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Alarm and Faults The History Log has the following fields: • Replay Rate — indicates how long it takes for the replay to play. Use the UP and DOWN buttons to set the time. • Status — the status of the Liebert STS2 at the point of the current frame in the replay. The History log has three statuses: Frozen, Not Frozen and Retrieving Data, please stand by. • Critical Event — The event which triggered this log to be written. The event is indicated in red on the bar graph.
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Alarm and Faults . Table 8 ID Event messages Alarm Message Description/Cause Action 001 S1 SCR SHORT One or more of the SCRs for Source 1 have shorted and failed. D, F, A, E 002 S2 SCR SHORT One or more of the SCRs for Source 2 have shorted and failed. D, F, A, E 003 S1 SCR OPEN One or more of the SCRs for Source 1 is open. D, F, A, E 004 S2 SCR OPEN One or more of the SCRs for Source 2 is open.
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Alarm and Faults Table 8 ID Event messages (continued) Alarm Message Description/Cause Action 084 CB1 (S1) OPEN Source 1, Circuit Breaker 1 is open. A, E 085 CB2 (S2) OPEN Source 2, Circuit Breaker 2 is open. A, E 086 CB4 (S1 BYP) CLOSED Source 1 on bypass, Circuit Breaker 4 is closed. A, E 087 CB5 (S2 BYP) CLOSED Source 2 on bypass, Circuit Breaker 5 is closed. A, E 088 CB3 (OUTPUT) OPEN Output circuit breaker (CB3) is open.
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Communication Interfaces 12.0 COMMUNICATION INTERFACES The Liebert STS2 monitoring system offers several choices for communications. The RS-232 terminal port is standard on all units. The port is located inside the front door, to the left of the touch screen/LED front panel mounting as shown in Figure 28. This port is primarily used as an alternate user interface to configure, control, and diagnose the system, especially for systems that do not include the HMI touch screen.
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Communication Interfaces 12.1.1 Connecting and Using a Terminal An RS-232 connection can be used to connect the Liebert STS2 to either a terminal or a PC running terminal emulation software. If you are unsure of the cable pin out, see 15.2.10 - Terminal Port Connections. 1. Connect the terminal to the Liebert STS2 by plugging the cable from the terminal into the RS-232 port. This connection can be made at any time. 2.
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Communication Interfaces Table 9 Terminal commands Keys UPMDR? VER? Function Displays metering data Displays firmware versions 12.1.2 Configuring the Liebert STS2 via the Terminal The SPT command is used to configure the systems setpoints. The SVT syntax for the setpoints consists for four parameters: SPT [group] [item] [value] where the parameters are: • SPT — is the terminal command that is used to configure setpoints.
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Communication Interfaces Value Parameter Item settings, depending on what they are, use various value types. Table 10 provides a list of the possible value types and their description. Table 10 Value types Type Definition Numeric An integer numeric value in the units indicated by the item name. For example, a System Voltage Rating of 480 would indicate 480 volts.
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Communication Interfaces Table 11 Group settings and values (continued) Group Group 3: User Settings Group 4: Event Mask Settings Item: Description Value Type Value Notes 1 SCR1 Fast Undervoltage Setpoint Integer In % of nominal below nominal 2 SCR1 Slow Undervoltage Setpoint Integer In % of nominal below nominal 3 SCR1 Slow Undervoltage Detect Delay Integer In number of lines cycles 4 SCR1 Overvoltage Setpoint Integer In % of nominal above nominal 5 SCR1 Overvoltage Detect Delay
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Communication Interfaces 12.1.3 Setting Bitpacked Options with the Terminal Five sets of options and features settings are available through the terminal to control the system operation.
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Communication Interfaces Critical Option Enabling bit0—EnableManual_IPeakReset bit1—EnableAutoRestart bit2 through bit15 - not used (set to 0) Non-Critical Option Enabling bit0 — EnableAutoReXfer bit1 through bit15 — not used (set to 0) The bits are set in reverse order, from bit 15 on the left to bit 0 (zero) on the right. The bits are grouped in four sets of four bits each, as such: 0000 0000 0000 0000 |................................| bit 15.........................
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Communication Interfaces Putting the Terminal Command Together For example, a unit only has the Remote Source Selection and Dual-Output Breaker options installed. Checking the bits list under Options_1 on page 81, bits 7 and 0 each must be set to 1 to indicate that these options are installed. The bit setting is as follows, starting with bit 15 on the left and going down to bit 0: 0000 0000 1000 0001 With the bits combined in groups of four, the binary settings can be translated into hexadecimal values.
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Communication Interfaces Examples of Event Mask Settings • To latch event #001, S1 SCR SHORT, use SPT 4 1 +L. • To disable event #128, CONFIG MODIFIED, from sounding the horn, use SPT 4 100 -A. • To enable event #012, OUT VOLT SENSE FAIL, to Dial and go into the Event Log, use SPT 4 12 +D+E. • To disable all masks for event #120, INPUT CONTACT #1, use SPT 4 120 -D-L-S-E-A.
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Liebert STS2 Touch Screen Display 13.0 LIEBERT STS2 TOUCH SCREEN DISPLAY The Liebert STS2 can be configured with a Color Graphical LCD touch screen that allows you to quickly check the status of the unit and identify problems. A touch screen LCD is available through the front of the Liebert STS2. This screen provides a graphical (Mimic) display of the switch’s operation, plus system information including system parameters, alarms and faults.
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Liebert STS2 Touch Screen Display 13.2 Menu Overview The touch screen menu provides access to configuration settings and more device information. The CONFIG (Configuration) and LOGS menus provide multiple choices through pop-up menus. The SOURCE XFER menu selection allows you to select the preferred source. The other menu choices provide information in the display panel. The menu choices are discussed later in this manual. All programmable functions are preset at the factory to default settings.
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Liebert STS2 Touch Screen Display 13.2.1 Security Because the Liebert STS2 Color Graphical Display provides access to various configuration and monitoring choices, a password or key lockout switch may be used to protect access to certain changes, including: • • • • Change configuration settings. Clear logs. Make a source transfer. Reset an alarm.
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Liebert STS2 Touch Screen Display 13.3 Mimic Display The Mimic display provides a color diagram of the operation of the Liebert STS2. This display imitates the power flow through the static transfer switch and indicates source status, breaker status, switch status, source voltage and current readings, output power measurements, and active alarm messages. See Figure 48 on page 85. 13.4 Event Controls The Liebert STS2 detects events when certain thresholds are passed or certain problems occur.
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Liebert STS2 Touch Screen Display To set the event masks: 1. Access the Event Mask dialog box: a. Select CONFIG. b. Select EVENT MASK from the pop-up menu. The Event Mask dialog box is displayed. See Figure 52. 2. Select the mask settings for each fault and alarm. a. Select YES to enable the setting, – or – b. Select NO to disable the setting. 3. Select SAVE to keep the settings.
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Liebert STS2 Touch Screen Display Figure 53 User settings dialog box Source Set Points The Source 1/2 Set Points allows you to configure trigger points for each input source (1 or 2) for the Liebert STS2 via a keypad dialog or HI/LO dialog box. The source numbers do not designate the source as the preferred or alternate source. The numbers simply identify the input source. See 10.2 Manual Transfer / Preferred Source Selection to set the preferred source.
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Liebert STS2 Touch Screen Display To configure the setpoints for each source: 1. Select SOURCE 1/2 Set Points from the User Settings dialog box. The Source 1/2 Set Points dialog is displayed. Figure 54 Source setpoints 2. Select 1 to configure the settings for Source 1. 3. Configure the settings using the keypad or dialog box that is displayed when you touch a button.
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Liebert STS2 Touch Screen Display 8. Select FREQUENCY TRIP POINT. A keypad is displayed. This choice verifies that the source is running at the proper frequency. This choice sets the frequency deviation in the frequency that triggers the frequency trip point alarm. The frequency deviation setting is the allowable frequency variation from nominal (60.0 or 50.0 Hz) before activating the frequency deviation alarm. The frequency setting applies to both input sources. a.
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Liebert STS2 Touch Screen Display System Settings The System Settings choice under the Config menu displays another pop-up menu with three choices: • Comm Options • System Options • System ID To access the System Settings menu: 1. Select CONFIG from the menu bar. 2. Select SYSTEM SETTINGS from the Config menu. Comm Options The Comm Options dialog box allows you to configure the communications settings for the Liebert STS2. • Select COMM OPTIONS from the System Settings Menu.
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Liebert STS2 Touch Screen Display Configuring the Modem The Modem dialog box allows you to configure the optional external modem that is connected to the static transfer switch. The dialog box contains a series of choices that access either a keypad or a secondary dialog to configure settings. Auto dial can also be configured for the modem to be triggered by events, as set up in the Event Mask choices. Designated major alarms activate the auto dial modem sequence.
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Liebert STS2 Touch Screen Display 9. Select INIT. STRING to configure the initialization string. This string configures the parameters of the modem. • Check your modem’s documentation for this setting. 10. Select BAUD RATE to display a dialog with the baud rate choices: • For an external modem, select from 2400 bps, 9600 bps or 19200 bps. 11. Configure the MODEM HEALTH CHECK. The Health Check verifies that the modem is working properly. This setting allows you to enable the check and set when it is run. a.
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Liebert STS2 Touch Screen Display These input alarms can also be configured to activate a programmable relay output, which is discussed in Configuring the Programmable Relay Board Settings on page 97. To configure the Input Contact Isolator relays: 1. Select INPUT CONTACT ISOLATOR from the Comm Options menu. The Input Contact Isolator dialog box is displayed. Figure 57 Input contact isolator dialog box 2. Select INPUT CONTACT 1. A keyboard is displayed to allow you to enter the name of the alarm. 3.
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Liebert STS2 Touch Screen Display Configuring the Programmable Relay Board Settings The Liebert STS2 can contain up to two Programmable Relay Boards (PRB) that can trigger an external device when an event occurs in the static transfer switch. For example, if Source 1 fails, an external light flashes. See 6.1 - Programmable Relay Board for more information on the PRBs. The Programmable Relay Board dialog box with two options: STANDARD SET and USER DEFINED SET.
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Liebert STS2 Touch Screen Display Figure 58 Programmable relay board dialog box 2. Select your configuration settings. • Select STANDARD SET to use the settings configured at the factory. See Go to step 4. • Select USER DEFINED SET to configure your own settings. Go to step 3. If you enter a user-defined setting, record the setting in Programmable Relay Board Settings Record on page 140.
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Liebert STS2 Touch Screen Display Liebert SiteScan Configuration An optional RS-422 port, contained in the Comms Board, can be installed in the static transfer switch to provide communications with Liebert’s SiteScan. Liebert SiteScan is Liebert’s system monitoring software that allows you to utilize a PC to monitor the static transfer switch’s status and check alarms. See 6.5 - Comms Board for more information on this board.
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Liebert STS2 Touch Screen Display 4-Pole Transfer Switch This selection is set at the factory to indicate whether the system is a 3-pole or 4-pole unit. Shunt This selection is set at the factory. Wye Output Transformer The Wye Output Transformer controls the firing of the SCRs on startup, which minimizes the inrush into PDU transformers. Output breakers and PDU input breakers have to be closed when you start up the system.
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Liebert STS2 Touch Screen Display 13.6.2 Logs Two types of logs are kept by the Liebert STS2: Event Log and History Log. Event Log The Event Log tracks the alarms and faults of the Liebert STS2. See 11.0 - Alarm and Faults for more information on these events and see 11.2.1 - Event Log for more information on the Event Log and definitions of the fields displayed in the Event Log screen. Figure 60 Event log To use the Event Log: 1. 2. 3. 4. Select LOGS from the menu bar to open the Logs menu.
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Liebert STS2 Touch Screen Display To use the History Log: 1. Select LOGS from the menu bar to open the Logs menu. 2. Select either HISTORY LOG 1 or HISTORY LOG 2 from the menu. 3. Select the appropriate buttons to replay the log: • Select PREV to go to the previous frame in the sequence. • Select NEXT to go to the next frame in the sequence. • Move the green cursor to the location from which you would like to play the sequence of events.
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Operating the Liebert STS2 LED Display 14.0 OPERATING THE LIEBERT STS2 LED DISPLAY Certain models of the Liebert STS2 do not include the LCD Color Graphical Display with the touch screen interface. This display is replaced by an LED front panel to allow you to monitor the unit and alert you when a problem occurs. The LED panel can be replaced with the Color Graphical Display, if desired. Instructions for using the LCD are in 13.0 - Liebert STS2 Touch Screen Display.
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Operating the Liebert STS2 LED Display 14.1.2 LED and Push Button Description The following table defines the LEDs and push buttons in the LED display: Table 15 Symbol LED and push button description LED Description Action A Green Source 1 power is present A green LED is lit if the Source 1 input power is present. This LED only indicates that power is present to the power supply; it does not indicate if the power is within the programmed tolerances of the unit.
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Operating the Liebert STS2 LED Display 14.1.3 Event Controls When an alarm is triggered, a red LED is lit in the control panel. A pair of buttons allows you to turn off the horn and reset the alarm. 14.1.4 Key Lockout Switch An optional key lockout switch for the Liebert STS2 enables or disables all push button inputs, except for the alarm silence button. The key lockout switch is mounted on the front of the unit. See Figures 8 to 10 for the key lockout switch location on each unit.
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Operating the Liebert STS2 LED Display 5. Close CB2. The green LED for CB2 turns on. 6. Verify that the preferred source LED (green) (LED_PREFx) is lit for the source that you want the switch to be using. 7. Verify that the green LED for the corresponding SCR (Liebert STS1 or Liebert STS2) is lit, indicating that the SCR is closed. 8. Close Output Breaker CB3 (and CB3A in a redundant output configuration). 9. Verify the CB3 LED is lit, indicating that CB3 is closed and the output and load are energized.
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Operating the Liebert STS2 LED Display To manually select the preferred source: 1. Ensure that the Transfer Inhibit (NOXF) LED is not lit. If the Transfer Inhibit LED is lit: • Check to see if the red alarm LED is lit. • If the alarm LED is lit, check the alarm messages on a PC terminal. • Correct alarm conditions before attempting a source transfer.
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Operating the Liebert STS2 LED Display 14.2.3 Maintenance Bypass The Liebert STS2 is equipped with two key-interlocked, bypass breakers, CB4 and CB5, to allow manual bypass of the switch electronics for either input source in the event of switch failure or for maintenance of the switch. Refer to the static transfer switch one-line diagram (Figure 3).
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Operating the Liebert STS2 LED Display Bypass Procedures for Source 2 If transfer to Source 1 is not desired: 1. Follow the instructions to transfer the load to Source 2, if it is not the currently used source. 2. Remove the interlock key from CB4 and place it in CB5 interlock. 3. Open the alternate source input breaker CB1. The LED for CB1 is turned off. 4. Rotate and remove the interlock key. 5.
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Operating the Liebert STS2 LED Display 14.2.4 Normal System Shutdown The Liebert STS2 can be shut down from either the static switch mode or the bypass mode. Shutdown in Static Transfer Switch Mode When the Static Transfer Switch is operating on static transfer switch mode (not maintenance bypass mode): 1. Turn off the load equipment per manufacturer’s recommendations. 2. Open CB3 to turn off the static switch output. • Open CB3A if the static transfer switch is a redundant output configuration.
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Specifications 15.0 SPECIFICATIONS This section provides the specifications for the Liebert STS2. 15.1 System Configuration The Liebert STS2 can be set in several different configurations, according to the model and location. The configuration is set at the factory and does not need to be changed by the customer. These configurations apply to both units, the Color Graphical Display and an LED Display. 15.1.1 Frequency The Liebert STS2 accepts input frequencies of 50 Hz and 60 Hz.
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Specifications 15.1.4 Grounding Refer to 5.3 - System Grounding for specifications and instructions regarding grounding. 15.1.5 Electrical Requirements Table 18 Electrical requirements Item Requirement Maximum Continuous Current 100, 250, 400, 600, 800, 1000 amps Load Power Factor Range 0.75 to 1.0, leading or lagging Load Crest Factor Up to 3.
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Specifications 15.2 System Components All Liebert STS2 models provide two static transfer switches within one enclosure, with the ability to transfer between two input sources to a single output. All Liebert STS2s are configured with either an LCD Color Graphical Interface touch screen display or LEDs for monitoring and configuring the unit. This section lists the common components and the differences for both types of units. 15.2.
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Specifications 15.2.4 Access The Liebert STS2 is designed so all repairs and maintenance can be done from the front or top of the unit. All components that may need repair or replacement during routine field maintenance are safely accessed with the units in bypass without removing power from the unit.
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Specifications 15.2.9 RS-232 Port The unit is equipped with an RS-232 port for connecting a terminal or PC. See Figure 28 for the port’s location. See 12.1 - Using the RS-232 Port for instructions on using a PC terminal with the unit. 15.2.10 Terminal Port Connections The system has an asynchronous serial port configured as Data Terminal Equipment for terminal access only (half duplex). The CPU services the terminal port with no handshaking.
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Specifications 15.2.11 RS-232 Interface Parameters The service terminal interface parameters are the following settings and cannot be changed. Table 23 RS-232 settings Parameter Setting Interface RS-232 Using EIA Voltage Levels Baud Rate 9600 Parity None Number of Data Bits 8 Number of Stop Bits 1 Hardware Flow Control Off Terminator Handshaking Not supported Structure Full duplex Local Echo Off 15.2.
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Event Message Help Text 16.0 EVENT MESSAGE HELP TEXT Key: ALL CAPS = event message displayed in the Event Display panel in the lower left corner of the LCD display. Indented text = help text shown in the Display Panel in the lower right corner of LCD display. BOLD = commands that are sent through the RS-232 port. S1 SCR SHORT Source 1 SCR Short. One or more of the SCRs for Source 1 has shorted. Transferring between sources has been inhibited.
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Event Message Help Text S2 SCR OPEN Source 2 SCR Open. One or more SCRs on Source 2 is open. Transferring between sources has been inhibited. Liebert STS2 output has been transferred to Source 1. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378). Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
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Event Message Help Text PWR SPLY DC A FAIL Power Supply DC Bus A Failed The primary power supply is no longer providing DC power to the control board and the touch screen. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378). Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
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Event Message Help Text PWR SPLY S2 AC FAIL Power Supply Source 2 AC Failed The AC input power to the power supplies from Source 2 has failed. The power supplies are now operating on AC power from Source 1. The AC input from Source 2 is still good. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378). Press SILENCE on the touch screen to turn off the audible alarm, if so configured.
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Event Message Help Text S1 VOLT SENSE FAIL Source 1 Voltage Sense Module Failed The module contained on the snubber monitoring the input voltage from Source 1 has failed. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378).
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Event Message Help Text S2 SCR SENSE FAIL Source 2 SCR Sense Module Failed The module contained on the snubber monitoring the SCRs for Source 2 has failed. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378). This event was written to the Event Log, if so configured.
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Event Message Help Text S2 GATE DRIVE FAIL Source 1 Gate Drive Failure The gate drive module for an SCR for Source 2 has failed. This module is contained on the left side gate driver board. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378).
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Event Message Help Text CB1 SHUNT TRIP FAIL Circuit Breaker 1 Shunt Trip Failure Circuit Breaker 1 failed to trip open when the control issued a command for the circuit breaker to trip. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. Contact Liebert for technical support at 1-800-LIEBERT (800-543-2378).
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Event Message Help Text S1 UV Source 1 Under Voltage (fast detection). The input voltage from Source 1 dropped below a set percentage of the nominal voltage, as set in the Fast UV set point under the User Settings. An S1 Fail alarm was also issued and source transfer has been inhibited. The load of the Liebert STS2 has been transferred to Source 2. Press SILENCE on the touch screen to turn off the audible alarm, if so configured.
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Event Message Help Text S1 OF/UF Source 1 Over Frequency/Under Frequency The frequency for Source 1 is running outside the acceptable operating range, as set in the Frequency Trip Point under User Settings. An S1 Fail alarm was also issued and source transfer has been inhibited. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
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Event Message Help Text S2 UV (RMS) Source 2 Under Voltage (slow detection). The input voltage from Source 2 remained below a set percentage of the nominal voltage for a designated period, as set in the Slow UV Setting and Slow UV Detection Delay set points configured under the User Settings. An S2 Fail alarm was also issued and source transfer has been inhibited. The load of the Liebert STS2 has been transferred to Source 1. Press SILENCE on the touch screen to turn off the audible alarm, if so configured.
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Event Message Help Text S2 FAIL Source 2 Failure Source 2 has failed due to under voltage (UV), over voltage (OV), or running with an over or under frequency (OF/UF). This alarm is a companion to S2 UV, S2 UV (RMS), S2 OV and S2 OF/UF. The load of the Liebert STS2 has been transferred to Source 1. Press SILENCE on the touch screen to turn off the audible alarm, if so configured.
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Event Message Help Text S1 I-PEAK Current Peak on Source 1 The peak current from Source 1 has exceeded the set point as defined in the I-PK Xfer Lockout setting under User Settings. Transferring to Source 2 has been inhibited. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
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Event Message Help Text LOAD ON ALT SOURCE Liebert STS2 load on the alternate source. The static transfer switch is running on the alternate power source. Check the Event Log to determine the reason for the transfer from the preferred source. Another event has caused the system to transfer to the alternate source. The system returns the load to the preferred source either automatically or manually, depending on how the system is configured.
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Event Message Help Text CB2 (S2) OPEN Circuit Breaker 2 (for Source 2) Open Circuit Breaker 2 is not closed. CB1 is only assigned to Source 2. Check that the Circuit Breaker 2 switch is in the desired position. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. This event was written to the Event Log, if so configured.
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Event Message Help Text If configured to be a latching alarm, press RESET on the display. If you are accessing the unit from a terminal, type CA and press RETURN on your keyboard. CB3A (OUTPUT) OPEN Circuit Breaker 3A (Output breaker) is Open (Optional) Circuit breaker 3A is not closed. This circuit breaker is assigned to the output load. The power flow to the load cannot flow through the static transfer switch. Press SILENCE on the touch screen to turn off the audible alarm, if so configured.
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Event Message Help Text TRANSFER INHIBITED Transfer Inhibited Uninterrupted transfer between sources is inhibited due to input source failure, sources out of sync, switch failure, or the unit is in bypass mode. Check the Event Log for the event or events that may have caused the alarm. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm.
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Event Message Help Text INPUT CONTACT #2 Input Contact Isolator #2 Occurrence of the indicated external event has been detected by Input Contact Isolator #2 of the Open Comms Digital Input option board. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. The event, with its assigned name, was written to the Event Log, if so configured.
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Event Message Help Text INPUT CONTACT #6 Input Contact Isolator #6 Occurrence of the indicated external event has been detected by Input Contact Isolator #6 of the Open Comms Digital Input option board. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. The event, with its assigned name, was written to the Event Log, if so configured.
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Event Message Help Text CONFIG MODIFIED Configuration Modified A set point has been updated and saved. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. The event was written to the Event Log, if so configured. The alarm has triggered a message to be sent to the modem, if so configured.
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Event Message Help Text EVENT LOG CLEARED Event Log Cleared All past alarms and faults are no longer recorded in the system’s event log. Press SILENCE on the touch screen to turn off the audible alarm, if so configured. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the audible alarm. This event was written to the Event Log, if so configured. The alarm has triggered a message to be sent to the modem, if so configured.
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Maintenance 17.0 MAINTENANCE ! WARNING Only qualified service personnel should perform maintenance on the static switch. Lethal voltages exist inside the unit during normal operation. The unit is supplied by multiple AC power sources. Disconnect and lock-out all power sources before working inside unit. Minimal periodic maintenance of the Liebert STS2 is required.
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Maintenance SUPPORT INFORMATION To contact Emerson Network Power Liebert Services for information or repair service in the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Services is available to assure fast repair of your unit with minimal downtime. Liebert Services offers a complete range of start-up services, repair services, preventive maintenance plans, and service contracts.
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Maintenance PROGRAMMABLE RELAY BOARD SETTINGS RECORD The optional Programmable Relay Board (PRB) has eight channels to report events to an external device. Up to ten (10) events can be programmed to each channel. See 6.1 - Programmable Relay Board for more information on the PRB. If your Liebert STS2 has the PRB option installed, list the settings below for future reference. If control power is lost in the Liebert STS2, the settings are not saved.
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Maintenance Channel 8: Channel 9: Channel 10: PRB Notes: 141
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Maintenance INPUT CONTACT ISOLATOR SETTINGS RECORD The Input Contact Isolator board (ICI) provides an Liebert STS2 module interface for up to eight external user alarm or message inputs to be routed through the static transfer switch’s alarm network. See 6.4 - Input Contact Isolator Board for more information on the ICI. If your Liebert STS2 has the ICI option installed, list the settings below for future reference. If control power is lost in the Liebert STS2, the settings are not saved.
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Ensuring The High Availability 0f Mission-Critical Data And Applications. Emerson Network Power, the global leader in enabling business-critical continuity, ensures network resiliency and adaptability through a family of technologies—including Liebert power and cooling technologies—that protect and support business-critical systems. Liebert solutions employ an adaptive architecture that responds to changes in criticality, density and capacity.