Liebert POWER PROTECTION STATIC TRANSFER SWITCH - Manuals

iv 15.0 S PECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 15.1 System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 15.1.1 Frequency . . . ...

v FIGURES Figure 1 Recommended derating for high altitude operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 2 Maximum ambient temperature for full load operation at higher altitudes . . . . . . . . . . . . . . . . . . 7 Figure 3 Typical static transfer swit...

vi Figure 53 Event mask dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89Figure 54 User settings dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

1 I MPORTANT S AFETY I NSTRUCTIONS 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 hazar...

2 O VERVIEW OF M ANUAL The 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 STS2 installed and running.Read the entire manual before proceeding with the unpacking and installation of the...

Safety Precautions 3 1.0 S AFETY P RECAUTIONS 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 oper...

Unpacking and Inspections 4 2.0 U NPACKING AND I NSPECTIONS A high-quality installation begins on the receiving dock. The STS2 and its packaging should be inspected when the unit is delivered. If the packaging is not damaged, unpack the unit and conduct an internal inspection before beginning the in...

Unpacking and Inspections 5 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 Considerations 6 3.0 L OCATION C ONSIDERATIONS The STS2 should be placed in a clean, cool and dry location. The 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...

Location Considerations 7 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). Figure 1 Recommended derating for high altitude operation Operation at full l...

Locating the STS2 8 4.0 L OCATING THE STS2 This section provides instructions for leveling the 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 STS2 can be anchored to the conc...

Power and Control Wiring 9 5.0 P OWER AND C ONTROL W IRING All power and control wiring should be installed by a qualified electrician. All power and control wir- ing must comply with the NEC and applicable local codes. Unless otherwise labeled, use the recom- mended tightening torque as shown in Ta...

Power and Control Wiring 10 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 STS2 are typically non-automatic circuit breakers that rely on the upstream and/or load overcurr...

Power and Control Wiring 11 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...

Power and Control Wiring 12 5.5 Remote Source Selection Wiring An optional Remote Source Selection board may be installed in your 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...

Options 13 6.0 O PTIONS This section discusses the options available for the STS2. The communications options are also dis- cussed 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 ...

Options 14 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...

Options 15 6.7 Network Interface Card (NIC) An OpenComms Network Interface Card (NIC) enables the STS2 to communicate to a network man- agement system (NMS). The NIC provides the internal hardware and software to communicate, via SNMP, to any I.P.-based Ethernet network through an RJ-45 connector us...

Options 16 6.12 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 c...

Installation Drawings 17 7.0 I NSTALLATION D RAWINGS Figure 5 Outline drawing: 100 – 250 amp STS2 GRAVITY SIDE VIEW TOP VIEW BOTTOM ENTRY AREA POWER CABLE BOTTOM ENTRY AREA CONTROL CABLE BOTTOM VIEW FRONT VIEW EXHAUST TOP ENTRY AREA TOP ENTRY AREA POWER CABLE CONTROL CABLE FRONT FRONT MAX. DOOR SWIN...

Installation Drawings 18 Figure 6 Outline drawing: 400 – 600 amp STS2 FRONT VIEW SIDE VIEW CONTROL CABLE TOP ENTRY AREA CABLE TOP ENTRY AREA EXHAUST CONTROL CABLE BOTTOM ENTRY AREA POWER CABLE BOTTOM ENTRY BOTTOM VIEW TOP VIEW GRAVITY FRONT FRONT MAX. DOOR SWING 180° (TYP) CENTER GRAVITY CENTER SEE ...

Installation Drawings 19 Figure 7 Outline drawing: 800 – 1000 amp STS2 BOTTOM POWER CABLE AIR FILTER DO NOT BLOCK AIR INTAKE AREA FRONT VIEW CABINET TOP ENTRY AREA CONTROL CABLE TOP ENTRY AREA POWER CABLE ( TY P ) SIDE VIEW TOP VIEW BOTTOM VIEW SEE DETAIL A FRONT FRONT AIR EXHAUST GRAVITY CENTER MAX...

Installation Drawings 20 Figure 8 Outline drawing: 100 – 250amp STS2 with a key lockout switch option GRAVITY SIDE VIEW TOP VIEW BOTTOM ENTRY AREA POWER CABLE BOTTOM ENTRY AREA CONTROL CABLE BOTTOM VIEW FRONT VIEW EXHAUST TOP ENTRY AREA TOP ENTRY AREA POWER CABLE CONTROL CABLE FRONT FRONT MAX. DOOR ...

Installation Drawings 21 Figure 9 Outline drawing: 400 – 600 amp STS2 with a key lockout switch option FRONT VIEW SIDE VIEW CONTROL CABLE TOP ENTRY AREA CABLE TOP ENTRY AREA EXHAUST CONTROL CABLE BOTTOM ENTRY AREA POWER CABLE BOTTOM ENTRY BOTTOM VIEW TOP VIEW GRAVITY FRONT FRONT MAX. DOOR SWING 180°...

Installation Drawings 22 Figure 10 Outline drawing: 800 – 1000 amp STS2 with the key lockout switch option BOTTOM POWER CABLE AIR FILTER DO NOT BLOCK AIR INTAKE AREA FRONT VIEW CABINET TOP ENTRY AREA CONTROL CABLE TOP ENTRY AREA POWER CABLE (TYP) SIDE VIEW TOP VIEW BOTTOM VIEW SEE DETAIL A FRONT FRO...

Installation Drawings 23 Figure 11 Seismic anchor drawing: 100 – 250 amp 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 ...

Installation Drawings 25 Figure 13 Seismic anchor drawing: 800 – 1000 amp 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 FULL...

Installation Drawings 32 Figure 20 Circuit breaker schedule CIRCUIT BREAKER SCHEDULE 100AMP TO 1000AMP STATIC TRANSFER SWITCH 2 NOTES: 1. THE STS2 AUTOMATIC MOLDED CASE BREAKERS ARE 3 POLE, 600VAC RATED WITH MAGNETIC TRIP ONLY. 2. UPSTREAM DEVICES (BY OTHERS) MUST BE USED TO PROVIDE OVERCURRENT PROT...

Installation Drawings 33 Figure 21 Control connection location diagram: 100 – 600 amp STS2 NOTES: 1. TYPICAL OPTIONS ARE SHOWN. FRONT VIEW WITH FRONT DOOR REMOVED CONTROL WIRING COMMS BOARD FOR SITESCAN, INPUT CONTACT ISOLATOR BOARD PROGRAMMABLE RELAY SEE OPTION OPTION LOCATION DETAIL LOCATION DETAI...

Installation Drawings 34 Figure 22 Control connection location diagram: 800 – 1000 amp STS2 PROGRAMMABLE RELAY SEE OPTION LOCATION DETAIL BOARD (OPTION) SEE NOTE 2 MODEM INTERFACE (OPTION) NETWORK INTERFACE CARD (NIC) (OPTION) EXTERNAL AND INTERNAL COMMS BOARD FOR SITESCAN, FRONT VIEW WITH FRONT DOO...

Installation Drawings 35 Figure 23 Control wiring for remote source selection option PS213007 Rev. 1 REMOTE SOURCE SELECTION SOURCE 1 PREFERRED 2 13 4 5 6 SOURCE 2 PREFERRED SEE NOTE 1 NOTES: 5. ALL WIRING MUST BE IN ACCORDANCE WITH NATIONAL DIAGRAM FOR LOCATION OF REMOTE SOURCE SELECTION OPT. 4. RE...

Installation Drawings 36 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...

Installation Drawings 37 Figure 25 Control wiring for the input contact isolator board option PS213002 Rev. 2 INPUT CONTACT ISOLATOR BOARD 8. ALL WIRING MUST BE IN ACCORDANCE WITH NATIONAL DIAGRAM FOR LOCATION OF INPUT CONTACT ISOLATOR BD. OPT. 5. REFER TO STATIC TRANSFER SWITCH CONTROL CONNECTION S...

Installation Drawings 39 Figure 27 Control wiring for the internal modem option PS213004 Rev. 2 SEE DETAIL A J1A COMMS BOARD MODEM LINE COMMUNICATIONS TO TELEPHONE LINE DETAIL A CUSTOMER SUPPLIED INTERCONNECTING CABLE (SEE NOTES) J1A MANUAL FOR CONFIGURING THE INTERNAL MODEM OPTION. 5. REFER TO CONT...

Installation Drawings 41 Figure 29 Control wiring for the RS-232 port FRONT VIEW UPPER HALF OF UNI T WITH DOOR OPENED LCD DISPLAY SEE DETAIL A PS213006 Rev. 1 DETAIL A RXD DB9 CONNECTOR TXD G N D NOTES: 1. RS-232 COMMUNICATION THROUGH DB9 CONNECTOR. 2. CONNECTOR ACCESSIBLE WITH FRONT DOOR OPENED. CO...

Installation Drawings 42 Figure 30 Outline drawing for input junction box PS211005 Rev. 1 32 [813] F 16 3/4 [426] 16 [406] 16 [406] A 100A 250A - 600A RATING 17 1/2 [445] DIMENSIONAL DATA - INCHES [mm] BC 14 [356] 30 [762] 6 [152] 6 [152] DE 12 [305] 10 [254] 33 [830] INPUT JUNCTION BOX (2) #6 AWG T...

Installation Drawings 43 Figure 31 Color LCD touch screen display STARTUP PROC. S1 SCR OPEN CONFIG S2 SCR OPEN HEATSINK OVERTEMP EQUIPMENT OVERTEMP AMBIENT OVERTEMP EVENT DISPLAY LOGS SOURCE XFERS RESET SI SCR SHORT S2 SCR SHORT ALARM CONTROLS MIMIC CB 2 SILENCE ALTERNATE -30 S O UR CE 2 A-B B-C C-A...

Installation Drawings 44 Figure 32 LED display (F ) (D ) (B ) (K ) (L ) (N ) (M ) 5 ~ 2 ~ (A ) 1 1 (G ) ~ 2 (I) 3A 3 ~ (C ) (E ) (H ) 4 PS211002 Rev. 0 LE D D IS P LA Y LE G E N D SOURCE 1 WITHIN TOLERANCE PUSHBUTTON TO SELECT SOURCE 1 AS THE PREFERED SOURCE SYMBOL TO INDICATE THE K AND M MUST BE PU...

Installation Drawings 45 Figure 33 Installation drawing, seismic floor stand 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 HOL...

Installation Drawings 46 Figure 34 Installation drawing, seismic floor stand 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 BRACK...

Installation Drawings 47 Figure 35 Installation drawing, seismic floor stand 100-250A A 2 P LA CES 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...

Installation Drawings 48 Figure 36 Installation drawing, seismic floor stand 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 37 Installation drawing, seismic floor stand 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 FL...

Installation Drawings 50 Figure 38 Installation drawing, seismic floor stand 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 BRACK...

Installation Drawings 51 Figure 39 Installation drawing, seismic floor stand 400-600A A 2 P LA CES 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...

Installation Drawings 52 Figure 40 Installation drawing, seismic floor stand 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 41 Installation drawing, seismic floor stand 800-1000A A B TOP VIEW FRONT VIEW BOTTOM VIEW ISOMETRIC VIEW 36.9" 83.9" SEE HEIGHT TABLE 29.44" TYP. 2.47" TYP. 71.55" TYP. 2.47" TYP MOUNTING PLATE ALIGN FOOT PARALLEL TO MOUNTING PLATE AS SHOWN FO...

Installation Drawings 54 Figure 42 Installation drawing, seismic floor stand 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 BRAC...

Installation Drawings 55 Figure 43 Installation drawing, seismic floor stand 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 SCR...

Installation Drawings 56 Figure 44 Installation drawing, seismic floor stand 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 STS2 Operations 57 8.0 I NTRODUCTION TO STS2 O PERATIONS 8.1 System Description A STS2 provides an automatic, seamless transfer between input power sources to an output load. The STS2 monitors the input sources, to ensure each source is operating within set parameters, as well as ens...

Introduction to STS2 Operations 58 8.1.2 Reliability and Agency Requirements The STS2 is designed for high reliability and high availability with a critical bus Mean Time Between Failure (MTBF) exceeding 1,000,000 hours. The STS2, Control/Power Module, and all its options are designed, tested and ce...

Introduction to STS2 Operations 59 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 STS2 includes key-interlocke...

Theory of Operation 60 9.0 T HEORY OF O PERATION 9.1 General Description The 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 STS2 Static Transfer Switch The STS2 is a 3 pole, double-throw, solid state automatic...

Theory of Operation 61 9.1.4 Emergency Transfer To ensure that power remains connected to the load, the STS2 automatically performs an emergency transfer from one input source to the other when an outage occurs on the existing source. The auto- matic transfer takes place if the other source’s voltag...

Theory of Operation 62 Hardware • The 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 STS2 unit i...

Theory of Operation 63 9.2.4 Logic Modules The logic contains three separate redundant logic modules. The modules contain the logic necessary to run the STS2 and control transfers and shunt trips under all circumstances, without any outside assistance once set-up and started properly. 9.2.5 Audible ...

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 start-up, the following operating guidelines can be used for standard equipment operation. These guidelines should be reviewed for any special equipmen...

Operating Instructions for the Touch Screen Interface 65 10.1 Normal System Turn-On 1. Ensure that all STS2 breakers—CB1, CB2, CB3, CB3A (if supplied), CB4, and CB5—are in the OFF position.a. Ensure that the key interlocks for CB1 and CB2 have their bolts retracted. b. Ensure that the key interlocks...

Operating Instructions for the Touch Screen Interface 66 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 ope...

Operating Instructions for the Touch Screen Interface 67 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 tha...

Operating Instructions for the Touch Screen Interface 68 Figure 48 Gate board viewing slot locations If the Color Graphical Display is not available, you can still use the following bypass procedures, ignore the steps to check the display, and check the LEDs .If your system contains the LED display,...

Operating Instructions for the Touch Screen Interface 69 10.4.1 Bypass Procedures for Source 1 To bypass the switch for Source 1: 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 ...

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 Graphical Display is not available, check the gate driver board LEDs through the slots in the control ...

Alarm and Faults 71 11.0 A LARM AND F AULTS Alarms and faults are events that are triggered when the operation of the static transfer switch falls outside of the defined parameters. These events can also be triggered by: user actions, such as chang- ing configurations, clearing logs, etc.; failed co...

Alarm and Faults 72 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 ca...

Alarm and Faults 73 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 STS2 at the point of the current frame in the replay. The History log has three statuses: Frozen...

Alarm and Faults 74 11.4 List of Messages Table 9 lists available event messages, a definition of the event, and the functions that are activated with the event by default. The functions are indicated as follows: D — The indicated event initiates the Auto-Dial sequence through the optional modem. A ...

Alarm and Faults 75 024 CB2 SHUNT TRIP FAIL CB2 shunt trip failed. D, A, E 064 HEATSINK OVERTEMP Heatsink has exceeded the recommended temperature. A, E 067 S1 UV Source 1 under voltage, fast detection. A, E 068 S1 UV (RMS) Source 1 under voltage, slow detection. L, A, E 069 S1 OV Source 1 over volt...

Communication Interfaces 76 12.0 C OMMUNICATION I NTERFACES The 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 2...

Communication Interfaces 77 12.1.1 Connecting and Using a Terminal An RS-232 connection can be used to connect the 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 Connec- tions . 1. Connect the terminal to the...

Communication Interfaces 78 12.1.2 Configuring the STS2 via the Terminal 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 use...

Communication Interfaces 79 Value Parameter Item settings, depending on what they are, use various value types. Table 11 provides a list of the possible value types and their description. Table 12 shows the various groups, the settings contained within, and the type of value it requires. Table 11 Va...

Communication Interfaces 81 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.Under System Settings for the SPT command, these items denote which options are INSTALLED: • 6 — Options_1• 14 ...

Communication Interfaces 82 Critical Option Enabling bit0—EnableManual_IPeakResetbit1—EnableAutoRestart bit2 through bit15 - not used (set to 0) Non-Critical Option Enab bit0 — EnableAutoReXferbit1 through bit15 — not used (set to 0) The bits are set in reverse order, from bit 15 on the left to bit ...

Communication Interfaces 83 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. T...

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 d...

STS2 Touch Screen Display 85 13.0 STS2 T OUCH S CREEN D ISPLAY The STS2 can be configured with a Color Graphical LCD touch screen display 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 STS2. This screen provides ...

STS2 Touch Screen Display 86 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 sourc...

STS2 Touch Screen Display 87 13.2.1 Security Because the 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 s...

STS2 Touch Screen Display 88 13.3 Mimic Display The Mimic display provides a color diagram of the operation of the STS2. This display imitates the power flow through the static transfer switch and indicates source status, breaker status, switch sta- tus, source voltage and current readings, output p...

STS2 Touch Screen Display 89 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 53 . 2. Select the mask settings for each fault and alarm. a. Select YES to enable the setting, – or...

STS2 Touch Screen Display 90 Figure 54 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 STS2 via a keypad dialog or HI/LO dialog box. The source numbers do not designate the source as the preferred or a...

STS2 Touch Screen Display 91 To configure the set points 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 55 Source setpoints 2. Select 1 to configure the settings for Source 1. 3. Configure the settings using t...

STS2 Touch Screen Display 92 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 fre- quency deviation in the frequency that triggers the frequency trip point alarm. The frequency deviation setting is the...

STS2 Touch 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 Config ...

STS2 Touch Screen Display 94 Configuring the Modem The Modem dialog box allows you to configure the optional, internal modem or an external modem that is connected to the static transfer switch. Only one modem can be utilized by the STS2. The dialog box contains a series of choices that access eithe...

STS2 Touch Screen Display 95 9. Select INIT. STRING to configure the initialization string. This string configures the parameters of the modem. • This setting only needs to be configured if an external modem is used. Check your modem’s documentation for this setting. • The string for the internal mo...

STS2 Touch Screen Display 97 Configuring the Programmable Relay Board Settings The 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 - Pr...

STS2 Touch Screen Display 98 Figure 59 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 defin...

STS2 Touch Screen Display 99 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. SiteScan is Liebert’s system monitoring software that allows you to utilize a PC to monitor the...

STS2 Touch Screen Display 100 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 minimiz...

STS2 Touch Screen Display 101 13.6.2 Logs Two types of logs are kept by the STS2: Event Log and History Log. Event Log The Event Log tracks the alarms and faults of the 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 ...

STS2 Touch 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 buttons to replay the log: • Select PREV to go to the previous frame in the sequence.• Select NEXT to g...

Operating the LED Display STS2 103 14.0 O PERATING THE LED D ISPLAY STS2 Certain models of the 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...

Operating the LED Display STS2 104 14.1.2 LED and push button description The following table defines the LEDs and pushbuttons in the LED display: Table 16 LED and push button description Symbol LED Description Action A Green Source 1 power is present A green LED is lit if the Source 1 input power i...

Operating the LED Display STS2 105 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 STS2 enables or disables all push button...

Operating the LED Display STS2 106 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 green LED for the corresponding SCR (STS1 or STS2) is lit, indicating that the SCR is closed. 8. Close Output Breaker CB3 (a...

Operating the LED Display STS2 107 14.2.3 Maintenance Bypass The 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 mainte- nance of the switch. Refer to the static tr...

Operating the LED Display STS2 108 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 sourc...

Operating the LED Display STS2 109 14.2.4 Normal System Shutdown The 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 mainte- nance bypass mode): 1. Tu...

Specifications 110 15.0 S PECIFICATIONS This section provides the specifications for the STS2. 15.1 System Configuration The STS2 can be set in several different configurations, according to the model and location. The con- figuration is set at the factory and does not need to be changed by the cust...

Specifications 111 15.1.4 Grounding Refer to 5.3 - System Grounding for specifications and instructions regarding grounding. 15.1.5 Electrical Requirements 15.1.6 Input Surge Suppression The STS2 is equipped with transient voltage surge suppression on each input for maximum surge suppression. The su...

Specifications 112 15.2 System Components All STS2 models provide two static transfer switches within one enclosure, with the ability to transfer between two input sources to a single output.All STS2s are configured with either an LCD Color Graphical Interface touch screen display or LEDs for monito...

Specifications 113 15.2.4 Access The 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. T...

Specifications 114 15.2.9 RS-232 Port The unit is equipped with an RS-232 port for connecting a terminal or PC. See Figure 29 for the port’s location. See 12.1 - Using the RS-232 Port for instructions on using a PC terminal with the unit. 15.2.10Terminal Port Connections The system has an asynchrono...

Specifications 115 15.2.11RS-232 Interface Parameters The service terminal interface parameters are the following settings and cannot be changed. 15.2.12Maintenance Bypass The STS2 is configured to allow the unit’s electronics to be bypassed to either input source for mainte- nance without interrupt...

Event Message Help Text 116 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 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 th...

Event Message Help Text 117 S2 SCR OPEN Source 2 SCR Open. One or more SCRs on Source 2 is open. Transferring between sources has been inhibited. 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 ...

Maintenance 137 17.0 M AINTENANCE Minimal periodic maintenance of the STS2 is required. As with all electrical distribution components, the system should be regularly inspected for electrical connection integrity, signs of excessive temper- atures, dirt accumulation, and proper system operation. 17....

Maintenance 138 S UPPORT I NFORMATION To contact Liebert Global Services for information or repair service in the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Global Services is available to assure fast repair of your unit with minimal downtime. Liebert Global Services offers a comple...

Maintenance 139 P ROGRAMMABLE R ELAY B OARD S ETTINGS R ECORD 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 ST...

Maintenance 141 I NPUT C ONTACT I SOLATOR S ETTINGS R ECORD The Input Contact Isolator board (ICI) provides an 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 ...

The Company Behind the Products With over a million installations around the globe,Liebert is the world leader in computer protectionsystems. Since its founding in 1965, Liebert hasdeveloped a complete range of support andprotection systems for sensitive electronics: • Environmental systems—close-co...