Emerson Static Transfer Switch manual

AC P ow er For Business-Criti cal C on tinuity™ Li eber t ® St ati c T ransf e r S wit ch 2 ™ Us er Man ual–100-1000A, 50/60Hz[...]

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i T ABLE OF CONTENTS I MPORT ANT S AFETY I NSTRUCTION S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 O VERVIEW OF M ANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.0 S AFETY P RE CAUTIONS . . . . . . . . . . . . . . . . .[...]

ii 7.0 I NST ALLATION D RAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.0 I NTRODUCTI ON TO L IEBERT STS2 O PER ATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 8.1 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

iii 12.0 C OMMUNICATION I NTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 12.1 Using the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 12.1.1 Connecting and Using a Terminal . . . . . . . . . . . . . . . . . . . . . [...]

iv 15.2 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 15.2.1 Frame and Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 15.2.2 Casters, Leveling and Seis mic Anchoring . . . . . . . . .[...]

v FIGURES Figure 1 Recommended derating fo r high altitude operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 2 Maximum ambient temperature for full load operatio n at higher altitudes . . . . . . . . . . . . . . . . . . 7 Figure 3 Typical static transfer switch on e-line diagram . . . . . . . . . . . . . .[...]

vi Figure 48 Liebe rt STS2 touch screen display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Figure 49 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Figure 50 Keyboard and keypad displa[...]

1 I MPORT A NT S AFETY I NSTRUCTIONS SAVE THESE INSTRUCTIONS This manual co ntains important ins tructions that shoul d be followe d during the ins tallation and maintenance of the Liebert Static Transfer Switch 2 (STS2 ). ! WARNING The unit is supplied by more than one power source. The unit co ntains hazardous vol tages if any of the inpu t sourc[...]

2 O VERVIEW OF M ANUAL The Liebert STS2 Installa tion, Operation and Maintenance Manual is organized in a logical progres- sion so that you can follow the procedures, in the order provided to get your Liebert STS2 installe d and running. Read the entire manual before proceeding w ith the unpacking and i nstallation of the Liebert STS2. The major se[...]

Safety Precautions 3 1.0 S AFETY P RECAUTION S Read this manual thoroughly before working with the static transfer switch. Be sure to review the warning under Important Safet y Instructions on page 1 . Refer to the Handling Considerations on page 5 before attempting to move the unit. Under typical operation an d with the doors closed, only normal s[...]

Unpacking and Inspection s 4 2.0 U NP ACKING AND I NSPECTIONS A high-quality installation begins on the receiving d ock. The Liebert STS2 and its packag ing should be inspected when the unit is deli vered. If the packaging is not da maged, unpack the unit and conduct an internal inspect ion before beginning the installa tion process. This section d[...]

Unpacking and Inspection s 5 2.2.1 Handling Considerations The static switch is bolted to a wooden shipping pall et to allow handling by forklift equipmen t or a pallet jack. Easily Moved — The unit is furnished with i ntegral castors t hat allow the unit to be rolled in to place after it has reached its location and is removed from the pall et. [...]

Location Cons iderations 6 3.0 L OCATION C ONSIDERATIONS The Liebert STS2 should be placed in a clean, cool and dry location . The Liebert STS2 requires o nly front access for install ation and maintenance. Back or side access is not required. Adequate space is required above the unit for conduit (i f configured as such) and cooling air flow . This[...]

Location Cons iderations 7 3.4 Altitude The standard units are designed for full load operatio n up to 4000 feet (1200 m) ab ove sea level. See Figure 1 for recommended deratings for altitude s greater than 4000 feet (1200 m). Figure 1 Recommended derat ing for high altitude operation Operation at f ull load at a higher altitude ca n be accommodate[...]

Locating the Lieb ert STS2 8 4.0 L OCATING THE L IEBERT STS2 This section provides instru ctions for leveling th e 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 an chored to the concrete floor t[...]

Power and Con trol Wir ing 9 5.0 P OWER AND C ONTROL W IRING All power and control wiring should be installed by a qualif ied electrician. All power an d control wir- ing must comply with the NEC and appli cable loca l codes. Unless otherwise labeled, use the recom- mended tightening to rque as shown in Table 24 - Torque tightening. The busbars are[...]

Power and Con trol Wir ing 10 Figure 3 T ypical stat ic transfer switch one- line diagram The input and output po wer wire size should be ba sed on the upstream overcu rrent protection device, observing the NEC and local codes. The molded case switches containe d in the Liebert STS2 are typicall y non-automatic circuit breakers that rely on the ups[...]

Power and Con trol Wir ing 11 For preparation purposes, the following tables prov ide the dimensions and wi re siz es for the input junction boxes. T able 3 Input junction box dimensions Switch Rating Length Inches (mm) Width Inches (mm) Height Inches (mm) 100 amp 16 (406) 14 (356) 6 (152) 250 to 600 amp 30 (762) 16 (406) 6 (152) T able 4 Input jun[...]

Power and Con trol Wir ing 12 5.3 System Grounding Equipment grounding — Grounding i s primarily for equ ipment and person nel safety, although proper g rounding also enhanc es equipment performance. All input and o utput power fe eds must include an equipment grounding m eans as required by the NEC and local codes. An insulated eq uipment ground[...]

Power and Con trol Wir ing 13 5.5 Remote Source Selection Wiring An optional Remote Source Select ion board may be installed in your Lieb ert STS2. This board is installed in the same bay as th e communications options. See Figures 21 and 22 for the location of these options. See Figure 23 for inform ation on the control w iri ng for the Remote Sou[...]

Options 14 6.0 O PTIONS This section discusses th e options available for the Liebert ST S2. 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 extern al device when an event occurs in the Liebert STS2. Each PRB has eight c[...]

Options 15 6.3 Distribution Cabinet With I-Li ne Panelboard—100-600A Unit s Only A distribution cabin et with a Square D I-Line panelbo ard offers space to plug in up to 10 three- pole branch circuit breakers (100A-250A). The panel board is rated at 600A with an overall short-circuit rating of 100,000 AIC. The full-height cabi net mounts on eithe[...]

Options 16 6.7 LED Display A light-emitting diod e display is available to replace the standard li quid crystal display touch screen control. The display provides moni toring and control throuh a series of LEDs and buttons. LEDs alert you when a problem occurs. A PC ru nning terminal emulation software connected to the RS-232 port is needed to acce[...]

Options 17 6.1 1 Input Junction Boxes and Cables Two input power junction boxes and interconnecting cables provide under floo r connection for the two input power feeds. Power terminal blocks are provid ed in each junction box for the connection of the input power conductors and a parity-sized ground conductor. The junction boxes are NEMA 1 enclo- [...]

Installation Drawings 18 7.0 I NST ALLATION D RAWIN GS Figure 5 Outline drawing: 100 – 250 amp L iebert STS2 PS21 1 100 Rev . 03 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 se[...]

Installation Drawings 19 Figure 6 Outline drawing: 400 – 600 amp L iebert STS2 PS21 1400 Rev . 02[...]

Installation Drawings 20 Figure 7 Outline drawing: 800 – 1000 amp Liebert STS2 PS21 1800 Rev . 02[...]

Installation Drawings 21 Figure 8 Outline drawing: 100 – 250amp Lieber t STS2 with a key lockout switch option PS21 1 101 Rev . 02 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 [...]

Installation Drawings 22 Figure 9 Outlin e drawing: 400 – 600 amp Liebert STS2 with a key lo ckout switch op tion PS21 1401 Rev . 02[...]

Installation Drawings 23 Figure 10 Outline drawing: 800 – 1000 amp Liebert STS2 with the key lockout switch option PS21 1801 Rev . 02[...]

Installation Drawings 24 Figure 1 1 Seismic anchor drawing: 10 0 – 250 amp Liebert STS2 PS211105 Rev. 0 5. MOVE CABINET INTO POSITION WITH REAR TABS INTO SLOTS OF FLOOR BRACKET. TABS TO EXTEND AT LEAST 1/2" THROUGH FLOOR BRACKET (FIG. 2). THEN ATTACH FRONT FLOOR BRACKETS TO FRONT CABINET BASE BRACKET BUT DO NOT FULLY TIGHTEN HARDWARE. 6. MAR[...]

Installation Drawings 25 Figure 12 Seismic anchor drawing: 40 0 – 600 amp Liebert STS2 5. MOVE CABINET INTO POSITION WITH REAR TABS INTO SLOTS OF FLOOR BRACKET. TABS TO EXTEND AT LEAST 1/2" THROUGH FLOOR BRACKET (FIG. 2). THEN ATTACH FRONT FLOOR BRACKETS TO FRONT CABINET BASE BRACKET BUT DO NOT FULLY TIGHTEN HARDWARE. 6. MARK HOLE LOCATIONS [...]

Installation Drawings 26 Figure 13 Seismic anchor drawing: 80 0 – 1000 amp Liebert STS2 5. MOVE CABINET INTO P OSITION W ITH REAR TABS INTO S LOTS OF FLOOR BRACKET. TABS TO EXTEND AT LEAST 1/2" THROUGH FLOOR BRACKET (FIG. 2). THEN ATTACH FRONT FLOOR BRACKETS TO FRONT CABINET BASE BRACKET BUT DO N OT FULLY T IGHTEN HARDWARE. 6. MARK HOLE LOCA[...]

Installation Drawings 27 Figure 14 Electrical field connect ions drawing: 100 – 250 amp Liebert ST S2 with single output break er PS212100 Rev. 3 FRONT VIEW 1. ALL DIMENSIONS ARE IN INCHES AND (MILLIMETERS). NOTES: (WITH FRONT PANELS REMOVED) SECTION A-A NEUTRAL BUS SOURCE 1 INPUT Ø B SOURCE 1 INPUT Ø C CB4 SIDE VIEW ONE-LINE DIAGRAM K3 K2 CB3 [...]

Installation Drawings 28 Figure 15 Electrical field connect ions drawing: 100 – 250 amp Liebert ST S2 with dual output breakers PS212101 Rev . 04[...]

Installation Drawings 29 Figure 16 Electrical field connect ions drawing: 400 – 600 amp Liebert ST S2 with single output break er PS212400 Rev. 2 CB1 CB4 GROUND BUS FRONT VIEW RIGHT SIDE VIEW NEUTRAL BUS BUS GROUND PEM NUT RIGHT SIDE VIEW INPUT/OUTPUT BUS .51 DIA. NEUTRAL BUS CB3 CB5 CB2 (WITH FRONT PANELS REMOVED) FRONT VIEW SYSTEM OUTPUT Ø A, [...]

Installation Drawings 30 Figure 17 Electrical field connect ions drawing: 400 – 600 amp Liebert ST S2 with dual output breakers PS212401 Rev . 03[...]

Installation Drawings 31 Figure 18 Electrical field connect ions drawing: 8 00 – 1000 amp Liebert STS2 wit h single output breaker SECTION A-A SIDE VIEW (WITH FRONT PANELS REMOVED) FRONT VIEW FRONT VIEW GROUND BUS .51 DIA. NEUTRAL BUS RIGHT SIDE VIEW .51 DIA. INPUT/OUTPUT BUS RIGHT SIDE VIEW NEUTRAL BUS GROUND BUS Ø A, Ø B, Ø C SYSTEM OUTPUT ?[...]

Installation Drawings 32 Figure 19 Electrical field connect ions: 800 – 1000 amp Liebert STS2 wit h dual output breakers PS212801 Rev . 03[...]

Installation Drawings 33 Figure 20 Liebert STS2 non-aut omatic circuit breaker sche dule 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 M[...]

Installation Drawings 34 Figure 21 Control connection location diagr am: 100 – 600 amp Liebert STS2 NOTES : 1. TYPICAL OPTIONS ARE SHOWN. FRONT VIEW WITH FRONT D OOR R EMOVED CONTROL WIRING INPUT CONTACT ISOLATOR BOARD PROGRAMMABLE RELAY SEE OPTION OPTION LOCATION DETAIL LOCATION DETAIL BOARD (OPTION) SEE NOTE 2 (OPTION) OR PROGRAMMABLE RELAY COM[...]

Installation Drawings 35 Figure 22 Control connection location diagr am: 800 – 1000 amp Liebert STS2 PROGRAMMABLE RELAY SEE OPTION LOCATION DETAIL BOARD (OPTION) SEE NOTE 2 Liebert IS-WEB/485 Card (Option) COMMS BOARD FOR LIEBERT SITESCAN, EXTERNAL MODEM INTERFACE (OPTION) FRONT VIEW WITH FRONT D OOR R EMOVE D CONTROL WIRING PS213800 Rev. 1 OPTIO[...]

Installation Drawings 36 Figure 23 Control wiring for remote source select ion option 1 2 3 4 6 5 S e e N o te 1 S2 S1 G N D G N D Rem o t e So ur ce Selec t ion PS 213007 Re v . 02 NO T ES 1. Cust om er - provided norm al l y open dr y cont act s . Rat i ng 10mA at 30V D C . 2. M axi mum cable l engt h 500 ft. ( 152m) w i t h # 16 AWG , 300 V mini[...]

Installation Drawings 37 Figure 24 Control wiring for the programmable relay board option PS213001 Rev. 2 PROGRAMMABLE RELAY BOARD 8. ALL WIRING MUST BE IN ACCORDANCE WITH NATIONAL (C=COMMON, NC=NORMALLY CLOSED, NO=NORMALLY OPENED) #16AWG FLEXIBLE STRANDED CABLE. 7. MAXIMUM CABLE LENGTH 500 FT. (152 METERS) WITH 6. CONTACT RATINGS: 1AMP @ 30VDC, 20[...]

Installation Drawings 38 Figure 25 Control wiring for the i nput cont act isolator board option 11 6 2345 789 61 5 14 13 12 11 10 J5 1 “ N O C U S TOM E R C ON N E C TION ” I N PU T C ONTAC T I SOL AT O R BO AR D 02 -810012 -X X P S 213002 Re v. 0 2 NOTES: 1. Customer control wiring conne ction points are T erminals 1 thro ugh 16 (see T able J5[...]

Installation Drawings 39 Figure 26 Control wiring for comms board E XT ERNA L MO DE M SEE D ETAI L A “NO CUST O ME R CO NNECT I O N” P S 213003 Re v. 0 2 L I EBER T SIT ESC AN SEE D ETAI L B “NO CUST O ME R CO NNE CT I O N” J8 1 J1 A CO M M S BO AR D 02- 810015-XX T B 55 T B56 TB 5 1 SEE NOT E 2 CU STO MER -SU PPLIED I NT E RCO NNE CT I NG [...]

Installation Drawings 40 Figure 27 Control wiring for the Liebert IntelliSlot Web/485 Card wit h Adapater + - 1 23 TB 3 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. Maximum cable length 1000 feet (300 meters) with twisted pair cable #22 A WG minimum. Signal vo[...]

Installation Drawings 41 Figure 28 Control wiring for the RS-232 port L C D D I SPL AY S ee Detai l A Fr on t V iew Upp er Hal f of Un i t W i th Door O pe n P S 213006 Re v. 0 1 6 7 8 9 12345 TX D RX D G N D DB 9 Connec tor Detai l A NO T ES 1. R S - 232 c om m uni c at i on t hrough D B 9 c onnec t or . 2. C onnec t or ac c es s i bl e w i t h f [...]

Installation Drawings 42 Figure 29 Outline drawing for input junction box G C B A B D E H G D i am eter hol e A C I NPUT JUNCT IO N B O X Loc at ion of F a ct o ry-Su p p l i e d In p u t P o w e r Cable As sem bly Rec omm ended Loc at ion f or Cus t om er Connect ion o f I nput P o wer Raceway (by ot her s ) 3 - Phas e , 3-W ir e P lus G r ound Po[...]

Installation Drawings 43 Figure 30 Color LCD touch screen display PR EF E RR E D ALT E R N A T E RE S E T SIL EN C E SI S C R SH O R T S2 SC R SH O R T S1 SC R OPEN S2 SC R OPEN HE AT S IN K OVE RT EM P EQU IPM EN T O VER TEMP AMB IEN T O VER T EMP S O U RCE 2 SO U R C E 1 0 -3 0 + 3 0 SO U R C E 1 60 . 0 H Z 2 08 V 20 8V 20 8V A- B B- C C - A 2 00[...]

Installation Drawings 44 Figure 31 LED display 4 3 3A (B ) 2 (D ) (F ) 5 (J ) (H ) (E ) 1 (C ) 1 (A ) (K) (M ) ! (N ) PS 211002 Rev . 0 2 (L) (G) Symbol LED Description A Green Source 1 Power is Present B Green Source 2 Power is Present C Green Source 1 Within Tolerance D Green Source 2 Within Tolerance E Gree n Source 1 SCRs is On F Green Source 2[...]

Installation Drawings 45 Figure 32 Inst allation drawing, seismic floor st and 100-250A INSTALLATION DRAWING FOR SEISMIC FLOOR STAND 100-250A STS2 INSTALLATION NOTES: 1. CHECK ALL HARDWARE FOR PROPER TORQUE PRIOR TO INSTALLATION. 2. INSTALL REAR LOWER STS2 BRACKET TO THE FLOOR STAND USING EXISTING HOLES WITH BENT FLANGE FACING THE FRONT OF THE FLOO[...]

Installation Drawings 46 Figure 33 Inst allation drawing, seismic floor st and 100-250A FRONT FRONT REAR REAR FRONT LEVELER FOOT DETAIL C (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 REAR LOWER STS2 BRACKET REAR FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET FRONT UPPER STS2 BRACKET FRONT (2 PLACES) CAP[...]

Installation Drawings 47 Figure 34 Inst allation drawing, seismic floor st and 100-250A A 2 P L A C ES DETAIL A REAR UPPER STS2 BRACKET REAR LOWER STS2 BRACKET UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M1[...]

Installation Drawings 48 Figure 35 Inst allation drawing, seismic floor st and 100-250A NOTE: SEE DWGS PS215000, PS215001, AND PS215002 FOR DETAILS. 30.0" 77.0" 32.1" RAISED FLOOR FRONT VIEW RIGHT SIDE VIEW ISOMETRIC VIEW PS215003 Rev . 0[...]

Installation Drawings 49 Figure 36 Inst allation drawing, seismic floor st and 400-600A A BOTTOM VIEW FRONT VIEW SEE HEIGHT TABLE B INSTALLATION NOTES: 1. CHECK ALL HARDWARE FOR PROPER TORQUE PRIOR TO INSTALLATION. 2. INSTALL REAR LOWER STS2 BRACKET TO THE FLOOR STAND USING EXISTING HOLES WITH BENT FLANGE FACING THE FRONT OF THE FLOOR STAND (FIG. 3[...]

Installation Drawings 50 Figure 37 Inst allation drawing, seismic floor st and 400-600A FRONT FRONT REAR REAR FRONT LEVELER FOOT DETAIL C (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 REAR LOWER STS2 BRACKET REAR FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET FRONT UPPER STS2 BRACKET FRONT (2 PLACES) CAP[...]

Installation Drawings 51 Figure 38 Inst allation drawing, seismic floor st and 400-600A A 2 P L A C ES DETAIL A REAR UPPER STS2 BRACKET REAR LOWER STS2 BRACKET UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M1[...]

Installation Drawings 52 Figure 39 Inst allation drawing, seismic floor st and 400-600A NOTE: SEE DWGS PS216000, PS216001, AND PS216002 FOR DETAILS. 38" 77.0" 32.1" RAISED FLOOR FRONT VIEW RIGHT SIDE VIEW ISOMETRIC VIEW PS216003 Rev . 0[...]

Installation Drawings 53 Figure 40 Inst allation drawing, seismic floor st and 800-1000A A B TOP VIEW FRONT VIEW BOTTOM VIEW ISOMETRIC VIEW 36.9" 83.9" SEE HEIGHT TABLE 2 9.44" TYP. 2.47" TYP. 71.55" TYP. 2.47" TYP MOUNTING PLATE ALIGN FOOT PARALLEL TO MOUNTING PLATE AS SHOWN FOOT DETAIL A FOOT DETAIL B RIGHT SIDE VIEW[...]

Installation Drawings 54 Figure 41 Inst allation drawing, seismic floor st and 800-1000A FRONT FRONT REAR REAR FRONT LEVELER FOOT DETAIL C (3 PLACES) CAP SCREW M12-1.75 x40mm SPLIT LOCK WASHER M12 FLAT WASHER M12 REAR LOWER STS2 BRACKET REAR FIG. 3 TOP VIEW OF FLOOR STAND WITH LOWER REAR MOUNTING BRACKET FRONT UPPER STS2 BRACKET FRONT (2 PLACES) CA[...]

Installation Drawings 55 Figure 42 Inst allation drawing, seismic floor st and 800-1000A RIGHT REAR UPPER STS2 BRACKET RIGHT REAR LOWER STS2 BRACKET UPPER REAR BRACKET TABS TO SLIDE INTO LOWER REAR BRACKET SLOTS (2 PLACES) CAP SCREW M10-1.5X30MM SPLIT LOCK WASHER M10 FLAT WASHER M10 (2 PLACES) CAP SCREW M12-1.75X40MM SPLIT LOCK WASHER M12 FLAT WASH[...]

Installation Drawings 56 Figure 43 Inst allation drawing, seismic floor st and 800-1000A NOTE: SEE DWGS PS217000, PS217001, AND PS217002 FOR DETAILS. 84" 77.0" 32.1" RAISED FLOOR FRONT VIEW RIGHT SIDE VIEW ISOMETRIC VIEW 32" 52" PS217003 Rev . 0[...]

Introduction to Lieb ert STS2 Operations 57 8.0 I NTRODUCTION TO L IEBERT STS2 O PERATIONS 8.1 System Description A Liebert STS2 provides an automatic, seamless tr ansfer between input power sources to an output load. The Liebert STS2 monitors the input sources, to ensure each source is operating wi thin set parameters, as well as ensure that each [...]

Introduction to Lieb ert STS2 Operations 58 8.1.2 Reliability and Agency Requirement s The Liebert STS2 is designed for high reliabilit y and high availability with a crit ical bus Mean Time Between Failure (MTBF) exceeding 1,000,000 hours. The Liebert STS2, Control/Power Module and all its options are designed, tested and certified, where applicab[...]

Introduction to Lieb ert STS2 Operations 59 8.2.4 Byp ass The static transfer switch can be manual ly bypassed to allow the power from a so urce to directly flow to the output load. This bypass allows the unit’s el ectronics to be serviced without dangerous voltages being present. The Liebert STS2 includes key-in terlocked maintenance bypass brea[...]

Theory of Operati on 60 9.0 T HEORY OF O PERATION 9.1 General Description The Liebert STS2 contains all the equipment necessa ry to prevent an interruption in power flow to the AC load, s hould your pri mary source fail. 9.1.1 Liebert STS2 St atic T ransfer Switch The Liebert STS2 is a 3-pole, double-throw, solid stat e automatic transfer switch th[...]

Theory of Operati on 61 9.1.4 Emergency T ransfer To ensure that power remains connected to the load, the Liebert STS2 automatically performs an emergency transfer from one input source to the othe r when an outage occurs on the existing source. The automatic transfer takes place if the other so urce’s voltage is within acceptable limits, and reg[...]

Theory of Operati on 62 Hardware • The Liebert STS2 operator interface in the Color Graphical Display unit is designed to prov ide all of the information required to conf igure and monitor the unit’s operation. • The control logic performs automatic oper ations with minimal operator interface. • Each Lieber t STS2 unit is equipp ed w ith ei[...]

Theory of Operati on 63 9.2.4 Logic Modules The logic contains three separate redundant logic modules. The modu les contain the logic necessary to run the Liebert STS2 and control transfers an d shunt trips under all ci rcumstances, without any outside assistance once set-up an d started properly. 9.2.5 Audible Alarm An audible a larm is installed [...]

Operating Instructions for the Touch Screen Interface 64 10.0 O PERATING I NSTRUCTIONS FOR THE T OUCH S CREEN I NTERFACE After the initial equipment startu p, the follow ing operating guidel ines can be used for standard equipment operation. These guidelin es should be reviewed for any special equipment modifications, special site conditions, or co[...]

Operating Instructions for the Touch Screen Interface 65 10.1 Normal System T urn-On 1. Ensure that all Liebert STS2 breakers—CB1, CB2, CB 3, CB3A (if sup plied), CB4, a nd CB5—are in the OFF position. a. Ensure that the key interlocks for CB 1 and CB2 have their bolts retracted. b. Ensure that the key interlocks fo r CB4 and CB5 have their bol[...]

Operating Instructions for the Touch Screen Interface 66 10.2 Manual T ransfer / Pref erred Source Selection The Source Transfer option (Source Xfers) in the touch screen menu allows you to select a preferred source. Transfers are only permitted wh en the volt age and current are withi n their proper operating range and the sources are synchron ize[...]

Operating Instructions for the Touch Screen Interface 67 To manually select the preferred source : 1. Verify that the in put breakers CB1 and CB2 are clos ed. 2. Select SOURCE XFERS from the menu bar. The Select Preferred Source screen is displa yed in the Event D isplay. 3. Check the Mimic to verify that Source 1 and Source 2 input voltages are co[...]

Operating Instructions for the Touch Screen Interface 68 Figure 47 Gate board viewing slot lo cations If the Color Graphical Display is not available, you can still use the following bypass procedures, ignore the steps to check th e display and check the LEDs. If your system contains the LED display, see 14.2.3 - Maintenance Bypass . GREEN LEDS ON [...]

Operating Instructions for the Touch Screen Interface 69 10.4.1 Bypass Procedures for Source 1 To bypass the swit ch for Source 1: 1. Verify Source 1 is supplying power via the Mimic. • If the Color Gr aphical Display i s not availabl e, check the gate drive r board LEDs thro ugh the slots in the control pan el. See Figure 47 . 2. Remove interloc[...]

Operating Instructions for the Touch Screen Interface 70 10.4.2 Bypass Procedures for Source 2 To bypass the switch for Source 2: 1. Verify Source 2 is supplying power via the Mimic. • If the Color Gr aphical Display i s not availabl e, check the gate drive r board LEDs thro ugh the slots in the control pan el. See Figure 47 . 2. Remove the inter[...]

Alarm and Faults 71 11 . 0 A LARM AND F AULT S Alarms and faults are events that are triggered when the operation of the stat ic 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 fa ilure , an SCR that is op[...]

Alarm and Faults 72 1 1.2 Event and History Logs The system tracks events through the Events Log and tracks sig nificant ev ents 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 s creen menu or t[...]

Alarm and Faults 73 The History Log has the following fiel ds: • Replay Rate — indicates how l ong it take s for t he replay to pl ay. Use the UP and DOWN b uttons to set the time. • Status — the status of the Liebert STS2 at the poin t of the current frame in the replay . The His- tory log has three statuses: Frozen , Not Frozen and Retrie[...]

Alarm and Faults 74 . T able 8 Event messages ID Alarm Message Description/Cause Action 001 S1 SCR SHORT One or more of the SCRs for Source 1 have shorted an d fail ed. D, F, A, E 002 S2 SCR SHORT One or more of the SCRs for Source 2 have shorted an d fail ed. D, F, A, E 003 S1 SCR OPEN On e or more of the SCRs for Source 1 is open. D, F, A, E 004 [...]

Alarm and Faults 75 084 CB1 (S1) OPEN Source 1, Cir cuit Breaker 1 is open. A, E 085 CB2 (S2) OPEN Source 2, Cir cuit 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 (OUT PUT) OPEN Outp ut circuit breaker (CB3)[...]

Communication Interfaces 76 12.0 C OMMUNICATION I NTERFACES The Liebert STS2 monitoring system of fers several choices for communications. The RS-232 te rminal port is standard on all un its. Th e 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[...]

Communication Interfaces 77 12.1.1 Connecting and Using a T erminal 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 ar e unsure of the cable pin out, see 15.2.10 - Terminal Port Connections . 1. Connect the terminal to the Liebert STS2 by plug ging the cable from[...]

Communication Interfaces 78 12.1.2 Configuring the Liebert STS2 via the T erminal The SPT command is used to configure the systems setpoints. The SVT syntax for the setpoints con- sists for four parameters: SPT [ group ] [ item ] [ value ] where the parameters are: • SPT — is the terminal command that is used to configure setpoints. • group ?[...]

Communication Interfaces 79 Va l u e P a r a m e t e r Item settings, depending on what they are, use various value types. Table 10 provides a list of the possible value types and their descript ion. Table 11 shows the variou s groups, the settings co ntained within, and th e type of value it requi res. T able 10 V alue types Type Definition Numeri[...]

Communication Interfaces 80 Group 3: User Settings 1 SCR1 Fast Undervoltage Setpoint Integer In % of nominal bel ow nominal 2 SCR1 Slow Undervoltage Setpoint Integer In % of nominal bel ow nominal 3 SCR1 Slow Undervoltage Detect Delay Integer In number of lines cycles 4 SCR1 Overvoltage Setpoint Integer In % of nominal abo ve nominal 5 SCR1 Overvol[...]

Communication Interfaces 81 12.1.3 Setting Bitpacke d Options with the T erminal Five sets of options and features settings are available through the terminal to control the system operation. Under System Settings for the SPT command, th ese i tems denote which opti ons are INSTALLED: • 6 — Options_1 • 14 — Comms Options 1 • 15 — Comms [...]

Communication Interfaces 82 Critical Option Enabling bit0—EnableManual_IPeakReset bit1—EnableAutoRestart bit2 through bit15 - not used (set to 0) Non-Critical Optio n Enabling bit0 — EnableAutoReXfer bit1 through bit15 — not used (set to 0) The bits are set in reverse orde r, from bit 15 on th e le ft to bit 0 (zero) on the right. The bits [...]

Communication Interfaces 83 Putting the T erminal Command T ogether For example, a unit only has the Remote Source Se lection and Dual-Output Breaker opti ons 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 option s are installed. The bit setting is as follows, starting with b[...]

Communication Interfaces 84 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 [...]

Liebert STS2 T ouch Screen Display 85 13.0 L IEBERT STS2 T OUCH S CREEN D ISPL AY The Liebert STS2 can be configur ed with a Colo r Graphical LCD touch screen that allow s you to quickly check the status of the unit an d identify pr oblems. A touch screen LCD is available through the front of the Liebert STS2. This s creen provides a graphi- cal (M[...]

Liebert STS2 T ouch Screen Display 86 13.2 Menu Overview The touch screen menu provides access to config uration settings and more device information. The CONFIG (Configuration) and LOGS m enus provid e multiple choices thro ugh pop-u p menus. The SOURCE XFER menu selection allows you to select the preferred source. The other menu choices pro- vide[...]

Liebert STS2 T ouch Screen Display 87 13.2.1 Security Because the Liebert STS2 C olor Graphical Display provides access to various configuration and mon- itoring choices, a password or ke y lockout switch may be used to pr otect access to certain changes, including : • Change configuration settings. •C l e a r l o g s . • Make a source transf[...]

Liebert STS2 T ouch Screen Display 88 13.3 Mimic Display The Mimic display provides a color diagram of the operation of the Liebert STS2. This display imi- tates the power flow through the static transfer switch an d indicates source status, breaker status, switch status, source voltage an d current re adings, output po wer measurements, an d activ[...]

Liebert STS2 T ouch Screen Display 89 To set the event masks: 1. Access the Event Mask dialog box: a. Select CONFIG. b. Select EVENT MASK f rom the pop-up me nu. 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 se[...]

Liebert STS2 T ouch Screen Display 90 Figure 53 User settings dial og box Source Set Point s The Source 1/2 Set Points allows you to configure trig ger points for each input source (1 or 2) for the Liebert STS2 via a keypad dia log or HI/LO di alog box. The sou rce numbers do not designate the source as the preferred or alternate source. Th e numbe[...]

Liebert STS2 T ouch Screen Display 91 To configure the setpoints for each source: 1. Select SOURCE 1/2 Set Points fr om the User Setting s dialog box. The Source 1/2 Set Points dialog is displayed. Figure 54 Source setpoint s 2. Select 1 to configure the settings for Source 1. 3. Configure the settings using the keypad or di alog box tha t is displ[...]

Liebert STS2 T ouch Screen Display 92 8. Select FREQUENCY TRIP POINT. A keypad i s displayed. This choice verifie s that the source is running at the proper freq uency. This choice sets the fre- quency devia tion in the frequency that triggers the frequency trip poin t alarm. The frequenc y deviation setting is the allowa ble frequency variat ion f[...]

Liebert STS2 T ouch Screen Display 93 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 Co nfig menu. Comm Options The Comm Optio[...]

Liebert STS2 T ouch Screen Display 94 Configuring the Modem The Modem dialog box allows you to configure the op tional external modem th at is connected to the static transfer switch. The dialog box contains a series of choices that access eith er a keypad or a secon dary dialog to config- ure settings. Auto dial can also be configured for th e mod[...]

Liebert STS2 T ouch Screen Display 95 9. Select INIT. STRING to config ure the initialization string. This string configures th e parameters of the modem. • Check your modem’s documentation for this set ting. 10. Select BAUD RATE to display a di alog wi th the ba ud rate choices: • For an external modem, select from 2400 bps, 960 0 bps or 192[...]

Liebert STS2 T ouch Screen Display 96 These input alarms can also be configured to ac tivate a programmable re lay output, which is dis- cussed in Configuring the Programmable Relay Board Settings on page 97 . To configure the Input Co ntact Isolator relays: 1. Select INPUT CONTACT ISOLATOR from the Comm Options menu. The Input Contact Isolator dia[...]

Liebert STS2 T ouch Screen Display 97 Configuring the Programmable Relay Board Settings The Liebert STS2 can contain up to two Programmab le Relay Boards (PRB) that can trigger an exte r- nal device when an event occurs in the static transf er switch. For example, if Source 1 fails, an exter- nal light flashes. See 6.1 - Programmable Relay Bo ard f[...]

Liebert STS2 T ouch Screen Display 98 Figure 58 Programmable relay board dialog box 2. Select your configuration set tings. • Select STANDARD SET to use the settings co nfigured at the factory. See Go to step 4 . • Select USER DEFINED SET to configur e your own settings. Go to step 3 . If you enter a user-defined se tting, record the setting in[...]

Liebert STS2 T ouch Screen Display 99 Liebert SiteScan Configuration An optional RS-422 port, contai ned in the Comms Boar d, 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 moni tor the static transfer s[...]

Liebert STS2 T ouch Screen Display 100 4-Pole T ransfer Switch This selection is set at the factory to indicate whether the system is a 3-pole or 4-pole uni t. Shunt This selection is se t at the factory. Wye Output T ransformer The Wye Output Transformer controls the firing of the SCRs on star tup, which minimizes the inrush into PDU transformers.[...]

Liebert STS2 T ouch Screen Display 101 13.6.2 Logs Two types of logs are kept by the Li ebert STS2: Event Log and History Log. Event Log The Event Log tracks the alarms and faults of the L iebert STS2. See 11.0 - Alarm and Faults for more information on these events and see 11.2.1 - Ev ent Log for more information on the Event Log and definiti ons [...]

Liebert STS2 T ouch Screen Display 102 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 but tons to replay the log: • Select PREV to go to the prev ious frame in the sequence. • Select NEXT to go to the next frame in the seque[...]

Operating the Liebert STS2 LED Display 103 14.0 O PERATING THE L IEBERT STS2 LED D ISPLAY Certain models of the Liebert STS2 do not includ e 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 replac[...]

Operating the Liebert STS2 LED Display 104 14.1.2 LED and Push Button Description The following table defines the LEDs and push buttons in the LED displa y: T able 15 LED and push button des cription Symbol 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 tha[...]

Operating the Liebert STS2 LED Display 105 14.1.3 Event Controls When an alarm is trigge red, a red LED is lit in th e control panel. A pai r of buttons al lows you to turn off the horn and reset the alarm. 14.1.4 Key Lockout Switch An optional key lockout sw itch for the Liebert STS2 enables or di sables all push button in puts, except for the ala[...]

Operating the Liebert STS2 LED Display 106 5. Close CB2. The green LED for CB2 turns on. 6. Verify that the preferred source LED (green) (LED_PREF x ) is lit for the source that you want the switch to be using. 7. Verify that the gree n LED for the corresponding SCR (Liebert ST S1 or Liebert STS2) is lit, indicating that th e SCR is closed. 8. Clos[...]

Operating the Liebert STS2 LED Display 107 To manually select the preferred source : 1. Ensure that the Transfer I nhibit (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 th e alarm messages on a PC terminal. • Correct alarm conditions before attempti ng a [...]

Operating the Liebert STS2 LED Display 108 14.2.3 Maintenance Bypa ss The Liebert STS2 is equipped with two key-interl ock ed, bypass break ers, CB4 and CB 5, to allow man- ual bypass of the switch electronics for either input source in the even t of switch failure or for mainte- nance of the switch. Re fer to the static transfer switch one-line di[...]

Operating the Liebert STS2 LED Display 109 Byp ass 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 interl ock key from CB4 and place it in C B5 interlock. 3. Open the alternate so urce input breaker CB1. The LED for CB1[...]

Operating the Liebert STS2 LED Display 110 14.2.4 Normal System Shut down The Liebert STS2 can be shut do wn from either the static switch mode o r the bypass mode. Shut down in S t atic T ransfer Switch Mod e When the Static Transfer Switch is operating on stati c transfer switch mode (not mainte- nance bypass mode): 1. Turn off the load equipment[...]

Specifications 111 15.0 S PECIFICATIONS This section provides the specifications for the Lieber t STS2. 15.1 System Configuration The Liebert STS2 can be set in se v eral different config urations, acco rding to the mode l and location. The configuration is set at the factory and does not need to be cha nged by th e customer. These config- urations[...]

Specifications 112 15.1.4 Grounding Refer to 5.3 - S ystem Gr ounding for spe cifications and inst ructions regarding grounding. 15.1.5 Electrical Requirement s 15.1.6 Input Surge Suppression The Liebert STS2 is equipped with transient volt age surge suppression on each input for ma ximum surge suppression. The surge suppre ssi on is capable of pro[...]

Specifications 113 15.2 System Component s All Liebert STS2 models provide two static transfer switches within one enclos ure, with the ability to transfer between two input so urces to a single output. All Liebert STS2s are configured wi th either an LCD Color Graphica l Interface touch screen display or LEDs for monitoring and configuring the uni[...]

Specifications 114 15.2.4 Access The Liebert STS2 is designed so al l repairs and maintenance can be do ne from the front or top of the unit. All components that may need repair or re placement during routine field maintenance are safely accessed with the units in bypass without removi ng power f rom the unit. These component s include: • All ele[...]

Specifications 115 15.2.9 RS-232 Port The unit is equipped with an RS-232 port for connect ing a terminal or PC. See Figure 28 for the port’s location. See 12.1 - Using the RS-232 Port for instruction s on using a PC term inal with the un it. 15.2.10 T erminal Port Connections The system has an asynchronous serial port conf igured as Data Termina[...]

Specifications 116 15.2.1 1 RS-232 Interface Parameters The service terminal interface parameters are the following settin gs and cannot be changed. 15.2.12 Maintenance Byp ass The Liebert STS2 is conf igured to allow the unit’s el ectronics to be bypassed to either input source for maintenance without interrupt ion of power to the load. The Lieb[...]

Event Message Help Text 117 16.0 E VENT M ESSAGE H ELP T EXT Key: ALL CAPS = event message displayed in the Event Display panel in the lower left co rner of the LCD display. Indented text = help text shown in the Disp lay Panel in the lower right corner of LCD display . BOLD = commands that are sent through the RS-232 port. S1 SCR SHORT Source 1 SC[...]

Event Message Help Text 118 S2 SCR OPEN Source 2 SCR Open. One or more SCRs on Source 2 is op en. T r ansferring between source s has been inhibited. Liebert STS2 output has been transferred to Source 1. Contact Liebert for technical suppor t at 1-800-LIEBERT (800-543-2378). Press SILENCE on the touch screen to turn off the audible alarm, if so con[...]

Event Message Help Text 119 PWR SPLY DC A FAIL Power Supply DC Bus A Failed The primary power supply is no longer providing DC pow er to the control bo ard and the touch screen. Contact Liebert for technical suppor t at 1-800-LIEBERT (800-543-2378). Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are acces[...]

Event Message Help Text 120 PWR SPLY S2 AC FAIL Power Supply Source 2 AC Failed The AC input power to the power supplie s 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 suppor t at 1-800-LIEBERT (800-543-2378). Press SILENCE on the tou[...]

Event Message Help Text 121 S1 VOLT SENSE FAIL Source 1 V oltage Sense Module Fail ed The module co ntained on the snubb er monitoring the input vo ltage from Source 1 has failed. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN[...]

Event Message Help Text 122 S2 SCR SENSE FAIL Source 2 SCR Sense Module Failed The module contained on the snubb er monitoring the SCRs for Source 2 has failed. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard t[...]

Event Message Help Text 123 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 configur ed. If you are accessing the Liebert STS2 system from a terminal, type SH a[...]

Event Message Help Text 124 CB1 SHUNT TRIP FAIL Circuit Breaker 1 Shunt Trip Failure Circuit Breaker 1 failed to trip open when the contro l issued a command for the circuit breaker to trip. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert STS2 system from a terminal, type SH and p[...]

Event Message Help Text 125 S1 UV Source 1 Under V oltage (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 a l so issued and source transfer has been inhibited. The load of the Liebert STS2 has been transferred to So[...]

Event Message Help Text 126 S1 OF/UF Source 1 Over Frequency/Under Freque ncy 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 tran sfer has been inhibited. Press SILENCE on the touch screen to turn off the audible alarm,[...]

Event Message Help Text 127 S2 UV (RMS) Source 2 Under V oltage (slow detection). The input voltage from Source 2 remained below a set percentag e of the nominal voltage for a designated period, as se t 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 trans[...]

Event Message Help Text 128 S2 FAIL Source 2 Failure Source 2 has failed due to under voltage (UV), over voltage (O V), or running with an over or unde r frequency (OF/UF). Th is 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 [...]

Event Message Help Text 129 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. T ransferring to Source 2 has been inhibited . Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert [...]

Event Message Help Text 130 LOAD ON ALT SOURCE Liebert STS2 load on the alternate source. The static transfer switch is running on the altern ate power source. Check the Event Log to determine the reason fo r the transfer from the prefe rred source. Another event has caused the sy stem to transfer to the alternate source. The system return s the lo[...]

Event Message Help Text 131 CB2 (S2) OPEN Circuit Breaker 2 (for Source 2) Open Circuit Breaker 2 is not closed. CB 1 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 configur ed. If you are accessing the Liebert STS2 system from [...]

Event Message Help Text 132 If configured to be a latching alarm, press RESET on the di splay . 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 assign ed to the output load. Th[...]

Event Message Help Text 133 TRANSFER INHIBITED T ransfer Inhibited Uninterrupted transfer between sources is inhibited due to input source failure, sources out of sync, swi tch failure, or the unit is in bypass mode. Check the Event Log for the event or ev ents that may have ca used the alarm. Press SILENCE on the touch screen to turn off the audib[...]

Event Message Help Text 134 INPUT CONTACT #2 Input Contact Isolator #2 Occurrence of the indicated ex ternal event has been dete cted by Input Contact Isolator #2 of the Open Co mms Digital Input option board. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert STS2 system from a term[...]

Event Message Help Text 135 INPUT CONTACT #6 Input Contact Isolator #6 Occurrence of the indicated ex ternal event has been dete cted by Input Contact Isolator #6 of the Open Co mms Digital Input option board. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. If you are accessing the Liebert STS2 system from a term[...]

Event Message Help Text 136 CONFIG MODIFIED Configuration Modified A set point has b een updated and saved. Press SILENCE on the touch screen to turn off the audible alarm, if so configur ed. 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 t[...]

Event Message Help Text 137 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 configur ed. If you are accessing the Liebert STS2 system from a terminal, type SH and press RETURN on your keyboard to turn off the aud[...]

Maintenance 138 17.0 M AINTENANCE Minimal periodic maintenance of the Liebert STS2 is required. A s with all electrical distribution com- ponents, the system should be re gularly inspected for electrical conn ection integrity, signs of exces- sive temperatures, dirt accumulati on, and proper system operation. 17.1 Proper T ightening of Nut s and Bo[...]

Maintenance 139 S UPPORT I NFORMATION 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 down time. Liebert Services offers a complete range of start-up services, repair services,[...]

Maintenance 140 P ROGRAMMABLE R ELAY B OA RD S ETTINGS R ECORD The optional Prog rammable Relay B oard (PRB) has ei ght 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 op tion installed, list[...]

Maintenance 141 Channel 8: Channel 9: Channel 10: PRB Notes:[...]

Maintenance 142 I NPUT C ONT ACT I SOLATOR S ETTINGS R ECORD The Input Contact Isolator board (ICI) provides an Liebert STS2 module in terface for up to eight external user alarm or message inputs to be rout ed through the static tran sfer switch’s alarm net- work. See 6.4 - Input Contact Isolator Board for more informati on on the ICI. If your L[...]

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