Liebert STS2 manual

P OWER D ISTRIBUTION STS2/PDU™ I NST ALLATION , O PERATION & M AINTENANCE M ANUAL 250A - 800A Three Phase 60 Hz[...]

C ONT ACTING L IEBERT FOR S UPPORT To contact Liebert Global Services for in formation or repair service in the United States, call 1-800-LIEBERT (1-800-5 43-2378). Liebert Global Se rvices offers a comple te range of start-up services, repair services, preventive ma intenance plans and service contracts. For repair or maintenance service outside t[...]

i T ABLE OF CONTENTS C ONT ACTI NG L IEBERT FOR S UPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I NSIDE F RONT C OVER I MPORT AN T S AFETY I NSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.0 U NP ACKING AN D I NSPECTIONS . . . . . . . . . . . . . . . . . . . . . . [...]

ii 8.0 I NTRODUCTI ON TO STS2/PDU O PER ATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 8.1 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 8.1.1 Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

iii 12.0 C OMMUNICATION I NTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 12.1 Using the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 12.1.1 Connecting and Using a Terminal . . . . . . . . . . . . . . . . . . . . . [...]

iv 15.0 E VENT M ESSAGE H ELP T EXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 16.0 M AINTENAN CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 16.1 Proper Tightening of Nuts and Bolts . . . . . . . . . . . . . . . . . . . . . . [...]

v Figure 36 Electrical field connections, 8600A STS2/PDU wi th left side output breaker. . . . . . . . . . . . . . . . 46 Figure 37 Electrical field connections, 800A STS2/PDU int erconne ct wiring . . . . . . . . . . . . . . . . . . . . . . . . 47 Figure 38 Electrical field connections, 800A STS2/PDU in terconnect wiring, breaker section . . . . .[...]

vi TA B L E S Table 1 Shipping weights (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 2 Heat output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3 Altitude conversi[...]

1 I MPORT ANT S AFETY I NSTRUCTIONS SA VE THESE INSTRUCTIONS This manual co ntains importan t instructions tha t should be fo llowed du ring the install ation and maintenance of the Liebert St atic Transfer Swi tch 2 Power Distribution Unit (STS2/PDU). Read this manual thor oughly, payin g special attention to the sections that appl y to your insta[...]

2 A thorough equipment inspec tion and supervis ed start-up by qualif ied service personnel are strongly recommended at these times: 1. Before unit is placed into service for the first time 2. After equipment relocation, and 3. Aft er the unit has been de-energized for an extended period of tim e ! CAUTION This unit complies with the limits for a C[...]

Unpacking and Inspection s 3 1.0 U NP ACKING AND I NSPECTIONS A high-quality installation begi ns on the recei ving dock. The STS2/PDU and its packaging should be inspected when the unit is delive red. If the packaging is not da maged, unp ack the unit and conduct- ing internal inspection before begi nning the instal lation process. This sect ion d[...]

Unpacking and Inspection s 4 1.2.1 Handling Considerations The STS2/PDU is bolted to a wood shipping pallet to allow handling by forkli ft equipment or a pallet jack. Check the unit size and weight. Refer to the cabine t drawings furnished with the unit for size and weight. Typical cabin et dimensions are shown in Figures 7 th rough 22 . Typical un[...]

Location Cons iderations 5 2.0 L OCATION C ONSIDERATIONS The STS2/PDU should be placed in a clean, cool and dry location. The 250A unit without an output cabinet requires only fron t access for installation and maintena nce. Both front and side access are required for installation and maintenance of 400-800 A units and 250A units with output cabine[...]

Location Cons iderations 6 2.4 Altitude The standard units are designed for full load operation up to 4000 feet (1200m) abov e sea level. See Figure 1 for recommended deratings for altitu des greater than 4000 feet ( 1200m). Figure 1 Recommended derat ing for high altitude operation Operation at f ull load at a higher altitu de can be a ccommodated[...]

Locating The STS2/PDU 7 3.0 L OCATING T HE STS2/PDU This section provides instru ctions for leveling the STS2/P DU and anchoring the unit to the floor, should that be required. 3.1 Anchoring the Unit to the Floor The STS2/PDU can be anchored to th e concrete floor to ensure stabili ty for the unit in the event of seismic activity. 3.2 Leveling of t[...]

Power and Con trol Wiring 8 4.0 P OWER AND C ONTROL W IRING All power and control wiri ng must be installed by a licensed, qualif ied electr ician. All power a nd con- trol wiring must comply with the National Electric al Code and all applicable local codes. Unless oth- erwise labeled, use the recomme nded tightening to rque shown in Table 2 9 . Th[...]

Power and Con trol Wiring 9 Figure 3 T ypical STS2/PDU, one -line diagram Figure 4 T ypical STS2 /PDU, one-line diagram, with dual st atic switch output circuit breakers (not availa ble on 250A units)[...]

Power and Con trol Wiring 10 Figure 5 T ypical STS2/PDU, one -line di agram, with inline distribution, dual static switch output circuit breakers Figure 6 T ypical STS2/PDU, one -line di agram, with I-Line distribution, du al sta tic switch output circuit breakers The input and output power wire size should be ba sed on the overcurrent prot ection [...]

Power and Con trol Wiring 11 4.2 System Grounding Equipment grounding—Groundin g is primarily for equipment and personnel safe ty, although proper grounding also enhances equip ment performance. All input and o utput powe r feeds must include an equipment grounding mean s as required b y the NEC and local codes. An insulated eq uipment ground con[...]

Power and Con trol Wiring 12 4.5 Power Supply The STS2/PDU is supplied with red undant power supplies that are designed to operate from a voltage range of 200V to 600V. The unit is set at the f act ory to match the nameplat e voltage. Fie ld adjust- ments are not necessary. If the unit needs to operat e at a voltage other than what is listed on the[...]

Output Power Wiri ng 13 5.0 O UTPUT P OWER W IRING The STS2/PDU standard model is provided with a ci rcuit breaker for connect i ng to the load or a remote distribution cabine t. Other distribution configurat ions are available. The three main types of distributi ons available for the STS2/PDU are: • Output Breaker • Inline Panelboards —two p[...]

Options 14 6.0 O PTIONS This section discusses th e options available for th e STS2/PDU. The communicat ions options are also discussed in 12.0 - Commun ication Interfa ces . 6.1 Programmable Relay Board The programmable relay board (PRB) provides a means to trigger an external device when an event occurs in the STS2/PDU. Each PR B has 8 channels. [...]

Options 15 6.3 Comms Board The Comms Board provides a communi cation interface to Liebert Site Scan, site monitoring product and/or an external or interna l mo dem. SiteLink-12 or SiteLink-4 is required for SiteScan to communi- cate with the STS2/PDU. The Comms Board is equipped with an RS-422 co mmunication port for communication to a Liebert Site[...]

Options 16 6.6 Remote Source Selection The Remote Source Selection allows the preferred input source to be chosen from a remote location. A user supplied normally open dry cont act allows the user to remotely se lect a source to be the preferred source in the same process as th e local source transfer selection. If both the input contacts are close[...]

Installation Drawings 17 7.0 I NST ALLATION D RA WINGS Figure 7 Outline drawing, 250A STS2/PDU[...]

Installation Drawings 18 Figure 8 Outline drawing, 250A STS2/PDU with right side I-Line distribution[...]

Installation Drawings 19 Figure 9 Outline drawing, 250A STS2/PDU with right side inline distribu tion[...]

Installation Drawings 20 Figure 10 Outline drawing, 250A STS2/PDU with lef t side I-Line distribution[...]

Installation Drawings 21 Figure 1 1 Outline drawing, 250A STS2/PDU with left side Inline distribution[...]

Installation Drawings 22 Figure 12 Outline drawing,400-600A STS2/P DU wit h right side inline distribut ion[...]

Installation Drawings 23 Figure 13 Outline drawing, 400-600A STS2/PDU wit h right side output breaker or I-Line distribution[...]

Installation Drawings 24 Figure 14 Outline drawing, 400-600A STS2/PDU with le ft side inline distributio n[...]

Installation Drawings 25 Figure 15 Outline drawing, 400-600A STS2/PDU wit h left side output breaker or I-Line distribution[...]

Installation Drawings 26 Figure 16 Outline drawing, 800A STS2/PDU with ri ght side output breaker or I-Lin e distribution[...]

Installation Drawings 27 Figure 17 Outline drawing, 800A STS2/PDU with right side inline distribution[...]

Installation Drawings 28 Figure 18 Outline drawing, 800A STS2/PDU with lef t side output breaker or I-Line distrib ution[...]

Installation Drawings 29 Figure 19 Outline drawing, 800A STS2/PDU with left side inline distribution[...]

Installation Drawings 30 Figure 20 Outline drawing, 250A STS2/PDU with key lockout switch option[...]

Installation Drawings 31 Figure 21 Outline drawing, 400-600A STS2/PDU, inline distribution, right side with key lockout switch option[...]

Installation Drawings 32 Figure 22 Outline drawing, 800A STS2/PDU, inli ne dist ribution, right side with key lockout switch optio n[...]

Installation Drawings 33 Figure 23 Electrical field connectio ns, 250A STS2/PDU input/output with CB8[...]

Installation Drawings 34 Figure 24 Electrical field connectio ns, 250A STS2/PDU input with CB3[...]

Installation Drawings 35 Figure 25 Electrical field connectio ns, 250A STS2/PDU input with CB3 & CB3A[...]

Installation Drawings 36 Figure 26 Electrical field connectio ns, 400-600A STS2/PDU input with CB3[...]

Installation Drawings 37 Figure 27 Electrical field connectio ns, 400-600A STS2/PDU input with CB3 and CB3A[...]

Installation Drawings 38 Figure 28 Electrical field connectio ns, 800A STS2/PDU input with CB3[...]

Installation Drawings 39 Figure 29 Electrical field connectio ns, 800A STS2/PDU input with CB3 and CB3A[...]

Installation Drawings 40 Figure 30 Electrical field connectio ns, 250A STS2/PDU output with inline p anelboards[...]

Installation Drawings 41 Figure 31 Electrical field connectio ns, 400-800A STS2/PDU output with inline p anelboards[...]

Installation Drawings 42 Figure 32 Electrical field connect ions, STS2/PDU output with I-Line p anelboard[...]

Installation Drawings 43 Figure 33 Electrical field connect ions, 400-600A STS2/PDU with right side output bre aker[...]

Installation Drawings 44 Figure 34 Electrical field connectio ns, 400-600A STS2/PDU with lef t side output breaker[...]

Installation Drawings 45 Figure 35 Electrical field connectio ns, 800A STS2/PDU with right side output breaker[...]

Installation Drawings 46 Figure 36 Electrical field connectio ns, 8600A STS2/PDU with lef t side output breaker[...]

Installation Drawings 47 Figure 37 Electrical field connectio ns, 800A STS2/PDU interconnect wiring[...]

Installation Drawings 48 Figure 38 Electrical field connectio ns, 800A STS2/PDU interconnect wiring, breaker section[...]

Installation Drawings 49 Figure 39 Electrical field connectio ns, 800A STS2/PDU interconnect wiring, STS section[...]

Installation Drawings 50 Figure 40 Electrical field connections, 800 A STS2/PDU interconnect wiring, left side distribution cabinet[...]

Installation Drawings 51 Figure 41 Electrical field connectio ns, 800A STS2/PDU interconnect wiring, lef t side one-line[...]

Installation Drawings 52 Figure 42 Electrical field connectio ns, 800A STS2/PDU interconnect wiring, lef t side one line with CB3A[...]

Installation Drawings 53 Figure 43 Electrical field connectio ns, 800A ST S2/PDU interconnect wiring, right side one line[...]

Installation Drawings 54 Figure 44 Electrical field connections, 800 A STS2/PDU interconnect wiring, right side one line with CB3A[...]

Installation Drawings 55 Figure 45 Control wiring, 800A STS2/PDU, lef t side distribution[...]

Installation Drawings 56 Figure 46 Control wiring, 800A ST S2/PDU, right side distribution[...]

Installation Drawings 57 Figure 47 Control connection location, 250A STS2/PDU[...]

Installation Drawings 58 Figure 48 Control connection location, 400-8 00A STS2/PDU[...]

Installation Drawings 59 Figure 49 Control location drawing con duit box , top entry , 400-600A STS2/PDU[...]

Installation Drawings 60 Figure 50 Control wiring for the programma ble relay board option[...]

Installation Drawings 61 Figure 51 Control wiring for the i nput cont act isolator board option[...]

Installation Drawings 62 Figure 52 Control wiring for comms board[...]

Installation Drawings 63 Figure 53 Control wiring for the internal modem option[...]

Installation Drawings 64 Figure 54 Control wiring for the Network Inte rface Card (NIC) option[...]

Installation Drawings 65 Figure 55 Control wiring for the RS-232 Port[...]

Installation Drawings 66 Figure 56 Control wiring for remote source select ion option[...]

Installation Drawings 67 Figure 57 Color LCD touch screen display[...]

Installation Drawings 68 T able 9 Input circuit breaker schedule, 250-800A STS2/PDU Rating STS2/PDU Input Volts Circuit Breakers (See One-Line Diagrams) Vendor Type Ampacity Voltage Interrupting Rating (Amps) 250A 208V CB6 & CB7 MERLIN GERIN NJHN 400A 208-240V 100K 480V NFNN 150A 380-480V 35K 600V NFNN 125A 600V 18K 400A 480V CB6 & CB7 MERL[...]

Introduction to STS2/ PDU Operations 69 8.0 I NTRODUCTION TO STS2/PDU O PERATIONS 8.1 System Description A STS2/PDU provides an automatic, seamless tran sfer between input power sources to an output load. The STS2/P DU monitors the in put sources, to ensure each sou rce is operating within set param- eters, as well as ensure that each source is wi [...]

Introduction to STS2/ PDU Operations 70 8.1.2 Reliability and Agency Requirement s The STS2/PDU is designed for high reliabilit y and high availability wi th a critical bus Mean Time Between Failure (MTBF) exceeding 1,000,000 hours. The STS2/PDU and all its options ar e designed, tested and certified, where applicable, to meet agency requirements a[...]

Introduction to STS2/ PDU Operations 71 8.2.2 T ransfer Should the preferred source fail or be outside acceptable voltage limits, the STS2/PDU transfers the input to the alternate source until the problem is rect ified in the preferred sou rce. The unit can be set to automatically transfer the input back to the preferred source or allow the transfe[...]

Theory of Operati on 72 9.0 T HEORY OF O PERATION 9.1 General Description The STS2/PDU contains all the equipment necessary to prevent an interruptio n in power flow to the AC load, shoul d your primary source fail. 9.1.1 St atic T ransfer Switch 2 Power Distribution Unit The STS2/PDU is a combination automatic static transfer switch and power dist[...]

Theory of Operati on 73 9.1.4 Emergency T ransfer To ensure that power remains connected to the lo ad, the STS2/PDU automatically performs an emer- gency transfer from one input sou rce 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 regar[...]

Theory of Operati on 74 Firmware The operator interface enables yo u to monitor the STS2/PDU, to configure setpoints for transfers, monitor system parameters and acce ss event and history logs. The firmw are is accessible through the LCD touch screen or the RS-232 in terface. The firmware includes: • View and set the preferred source. • View an[...]

Operating Instru ctions 75 10.0 O PERATING I NSTRUCTIONS After the initial equipment start-up, the following op erating guidel ines can be used for standard equ ip- ment operation. These guidelines should be review ed for any special equipment modifications, special site conditions or company polic ies that may re quire changes to the standard equi[...]

Operating Instru ctions 76 4. Close CB1. 5. Verify that Source 1 voltages are nominal an d that CB1 bre aker status is correctl y indicated on the Monitor/Mimic screen. 6. Close CB2. 7. Verify that Source 2 voltages are nominal an d that CB2 bre aker status is correctl y indicated on the Mimic screen. 8. Verify that boxes for the preferred source a[...]

Operating Instru ctions 77 Figure 60 Source T ransfer screen To manually select the prefe rred source: 1. Close the input breakers CB6, CB7, CB1 and CB2. 2. Select SOURCE XFERS from the menu bar. The Select Preferred Source screen is displa yed in the Even t Display. 3. Check the Mimic to verify that Source 1 and Source 2 input voltages are correct[...]

Operating Instru ctions 78 10.4 Maintenance Byp ass The STS2/PDU is equipped with two ke y-interlocked, bypass break ers, CB4 and CB5, to all ow 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. Refer to Figure 3 . W hile operating o n maintenance bypass, all voltag[...]

Operating Instru ctions 79 10.4.1 Byp ass Procedures for Source 1 To bypass the switch for Source 1: 1. Verify Source 1 is supplying power via the Mimic. • If the Color G raphical Disp lay is not av ailable, check the gate driver board LEDs thro ugh the slots in the control pan el. See Figure 61 . 2. Remove interlock key from CB5 and place it in [...]

Operating Instru ctions 80 10.4.2 Byp ass Procedures for Source 2 To bypass the switch for Source 2: 1. Verify Source 2 is supplying power via the Mimic. • If the Color G raphical Disp lay is not av ailable, check the gate driver board LEDs thro ugh the slots in the control pan el. See Figure 61 . 2. Remove the interlock key fro m CB4 and place i[...]

Operating Instru ctions 81 10.5.2 Shut down in Maintenance Byp ass Mode When the Static Transfer Switch 2 Power Di stribution Unit is operating on bypass: 1. Turn off the load equipment pe r manufacturer’s recommendations. 2. Open CB8 or pan elboard breakers and main if suppl ied 3. Open the bypass switch (CB4 or CB5) to tu rn off the stati c tra[...]

Alarms and Faults 82 11 . 0 A LARMS AND F AULT S Alarms and faults are events that are triggered wh en the operation o f the Static Transfer Switch 2 Power Distribution Unit f alls outside of the define d parameters. These events can also be trig gered by: user actions, such as changing configurations, cl earing log s, etc .; failed components such[...]

Alarms and Faults 83 1 1.2 Event and History Logs The system tracks events through the Events Log and tracks significant ev ents through the History Logs. These logs allow you to quickly spot trends or diagnose problems that the unit may ha ve had. Both logs are written in nonvolatile memory. The logs can be accessed from the touch s creen menu or [...]

Alarms and Faults 84 1 1.2.2 History Log When a designated major a larm occurs , the History Status buffer is froz en, ca pturing 64 sequen tial frames before and after the alarm condition. When the Histor y Status buffer is frozen, a History Log is created. Two History Logs are availa ble to track major alarms. This log includes the triggering eve[...]

Alarms and Faults 85 T able 12 Event messages ID Alarm Message Description/Cause Action 1 S1 SCR SHORT One or more of the SCRs for Source 1 have shorted and failed. D, F, A, E 2 S2 SCR SHORT One or more of the SCRs for Source 2 have shorted and failed. D, F, A, E 3 S1 SCR OPEN One or more of the SCRs for Source 1 is open. D, F, A, E 4 S2 SCR OPEN O[...]

Alarms and Faults 86 81 SOURCES OUT OF SYNC Source 1 and Source 2 are out of synchronization. A, E 82 LOAD ON ALT SOURCE The output load is running o n the alternate source. A, E 83 AUTO REXFER INHIBIT Automatic retransfer is i nhibited. A, E 84 CB1 (S1) OPEN Source 1, Circuit Breaker 1 is open. A, E 85 CB2 (S2) OPEN Source 2, Circuit Breaker 2 is [...]

Communication Interfaces 87 12.0 C OMMUNICATION I NTERFACES The STS2/PDU monitoring system offe rs several choices for communications. The RS-232 termi nal port is stan dard on all units. The po rt is inside the front doo r, to the left of the touch screen front panel mounti ng as shown in Figure 55 . This port is primarily used as an alternate use[...]

Communication Interfaces 88 12.1 Using the RS-232 Port The RS-232 port is configure d with a baud rate of 9600 wi th 8 Data Bits, 1 Stop Bit, No Parity and no hardware handshaking. 12.1.1 Connecting and Using a T erminal An RS-232 connection can be used to connect the STS2/PDU to either a terminal or a PC running termi nal emulation software. If yo[...]

Communication Interfaces 89 12.1.2 Configuring the STS2/PDU via the T erminal The SPT command is used to configure the systems setpoints. The SVT sy ntax for the setpoints con- sists for four parameters: SPT [group] [item] [val ue] where the parameters are: • SPT — is the terminal command that is used to configure setpoints. • group — the g[...]

Communication Interfaces 90 Va l u e P a r a m e t e r Item settings, depending on what they are, use v arious value types. Tabl e 14 provides a list of the possible value types and their descript ion. T able 14 V alue types Type Definition Numeric An integer numeric valu e in the units indicat ed by the item name. For exam ple, a System Voltage Ra[...]

Communication Interfaces 91 Table 15 shows the variou s groups, the settings contai ne d within and the type of value it requires. T able 15 Group settings and values Group Item: Description Value Type Value Notes Group 1: System Ratings 1 Input Volts (PDU) Integer Set per system spec. 2 Volts Integer Set per system spec. 3 Current Integer Set per [...]

Communication Interfaces 92 12.1.3 Setting Bitp acked Options With the T erminal Five sets of options and features setti ngs are avai lable through the terminal to control the system operation. Under System Settings for the SPT command, th ese i tems denote which options are INSTA LLED: • 6 — Options_1 • 14 — Comms Options 1 • 15 — Comm[...]

Communication Interfaces 93 Critical Option Enabling • bit0—EnableManual_IPeakReset • bit1—EnableAutoRestart • bit2 through bit15 - not used (set to 0) Non-Critical Optio n Enab bit0 — EnableAutoReXfer bit1 through bit15 — not used (set to 0) The bits are set in reverse orde r, from bit 15 on th e left to bit 0 (zero) on the right. Th[...]

Communication Interfaces 94 Putting the T erminal Command T ogether For example, a unit only has the Remote Source Se lection and Dual-Output Breaker options in stalled. Checking the bits list under Options_1 on page 92 , 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 bi[...]

Communication Interfaces 95 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 [...]

T ouch Screen Display 96 13.0 T OUCH S CREEN D ISPLAY The STS2/PDU can be configured with a Color Graphi cal LCD touch screen disp lay that allows you to quickly check the status of t he unit and id entify problems. A touch screen LCD is available through the front of the STS2/PDU. This scre en pro vides a grap hical (Mimic) displ ay of the switch?[...]

T ouch Screen Display 97 13.2 Menu Overview The touch screen menu provides access to config uration settings and more device information. The CONFIG (C onfiguration) and LOGS menus pro vide multiple choi ces through pop-up me nus. The SOURCE XFER menu selection allows you to se lect the preferred source . The other menu choices provide informat ion[...]

T ouch Screen Display 98 13.2.1 Security Because the STS2/PDU Color Graphical Display prov ides access to various configuration and moni- toring choices, a password or key 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 transfer • Reset an alarm[...]

T ouch Screen Display 99 13.3 Mimic Display The Mimic display provides a color diagram of th e operation of the STS2/PDU. This display imitat es the power flow through the Static Transfer Switch 2 Power Distribution Unit and indicates source status, breaker status, switch status, sour ce vo ltage and current readings, output power measure- ments an[...]

T ouch Screen Display 100 Event Masks The STS2/PDU gathers, processes and reports faults and alarms, collectively referred to below as events. The Event Mask dialog box allows you to se t the system’s response for specific alarms and faults that are generated. See 11.0 - Al arms and Fa ults for more information on events and 11.1 - Event Mask for[...]

T ouch Screen Display 101 User Settings The User Settings choice allows you to adjust the user-accessible switch setting s. Access is limi ted to qualified personnel via system security. To access the User Setti ngs dialog box: 1. Select CONFI G. 2. Select USER SETTINGS fr om the pop-up menu. The User Settings dialog box is displayed. See Figure 67[...]

T ouch Screen Display 102 To configure the setpoints for each source: 1. Select SOURCE 1/2 SETPOINTS from the User Settings dial og box. The Source 1/2 Setpoints dialog is displayed. Figure 68 Source setpoint s 2. Select 1 to configure th e settings for Source 1. 3. Configure the setting s using the key pad or dial og box tha t is displayed when yo[...]

T ouch Screen Display 103 8. Select FREQUENCY TRIP POIN T. A keypad is display ed. This choice verifie s that the source is running at the pr oper frequency. This cho ice sets the fre- quency devia tion in the frequency that tri ggers the frequency trip poin t alarm. The fr equency deviation setting is the allow able frequency variation from nomina[...]

T ouch Screen Display 104 PDU Setpoint s The PDU Setpoints option allows you to configure the following parameters for the PDU, shown in Figure 69 . • Load Voltage THD (%) • Neutral Current (% of nom) • Ground Current (A) • Load Bus Overcurrent (% of nom) Figure 69 PDU setpoint s Table 18 shows the range of valid values, default values and [...]

T ouch Screen Display 105 Comm Options The Comm Options dialog box allow s you to conf igure the communications settings for the STS2/ PDU. • Select COMM OPTIONS from the System Settings Menu. • The Comm Options dialog box is displayed . See Figure 70 . • An option can be enable d by selecting YES. • An option can be disabled by se lecting [...]

T ouch Screen Display 106 To configure the modem: 1. Select MODEM from the Comm Options me nu. The Modem dialog box is displayed. Figure 71 Modem dialog box 2. Select the type of modem that the STS2/PDU will be using: • Select INT if the STS2/PDU will be communicating via an internal modem. • Select EXT if the STS2/PDU will be communicating via[...]

T ouch Screen Display 107 12. Configure AUTO DIAL IN. Auto Dial In allows a user to dial into the STS2/PDU through the modem to check status and access the sy stem via a hyperter minal connection. a. Select YES to activate the dial in feature. b. Select NO to deac tivate the dial in feature. 13. Co nfigure AUTO DIAL OUT. Auto Dial Out all ows the S[...]

T ouch Screen Display 108 Configuring the Input Cont act Isolator Settings The Input Contact Isol ator (ICI) is an op tional, eight-channel in put board for up to eigh t external user alarm or message inputs to be routed to the Static Transfer Switch 2 Po wer Distribution Un it’s alarm network. The contact is set to either be normally open or no [...]

T ouch Screen Display 109 5. Select DELAY. A keypad is displayed prom pting you for a delay time, in secon ds, for a cond ition to exist be fore the alarm is triggered. 6. Enter the delay value. The range for the va lues are fro m 0 (zero) to 99.9 seconds. 7. Select OK on the keypad to keep your se tting. The value you entered is displayed in the f[...]

T ouch Screen Display 110 To configure your programmable re l ay boards for user defined settings: 1. Se lect PROG. RELAY BOARD # x from the Comm Options dial og box, where x is the corresponding board number. The Prog. Relay Board dialog box is di splayed. Figure 73 Programmable relay board dialog box 2. Select y our configuration settings. • Se[...]

T ouch Screen Display 111 SiteScan Configuration An RS-422 port on the optional Comms Board pr ovides communications wi th Liebert’s SiteScan. SiteScan is Liebert’s system monitoring software that allows you to utilize a PC to monitor the Static Transfer Switch 2 Power Distribution Unit’s status and check alarms. See 6.3 - Comms Board for mor[...]

T ouch Screen Display 112 PDU This selection is se t at the factory to YES, whic h allows the LCD to draw the Mimic acco rdingly and display PDU metering and alarm in formation. Select the PDU button in the System Options wi ndow (see Figure 74 ). This opens the PDU Options window, shown below in Figure 75 . Figure 75 PDU options butt on The PDU Op[...]

T ouch Screen Display 113 13.7.1 Logs Two types of logs are kept by the STS2/PDU: Ev ent Log and History Log. Event Log The Event Log tracks the alarms and faults of the STS2/P DU. See 11.0 - Alarms and Faults fo r more information on these events and see 11.2.1 - Event Log for more information on the Event Log and definiti ons of the fields di spl[...]

T ouch Screen Display 114 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 LO G 2 from the menu. 3. Select th e 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[...]

Specifications 115 14.0 S PECIFICATIONS 14.1 System Configuration The STS2/PDU can be set in several different co nfig urations, according to th e model and lo cation. The configuration is set at the factory and does not need to be changed by the customer. 14.1.1 Frequency The STS2/PDU accepts input frequencies of 50 Hz or 60 Hz, depending on the m[...]

Specifications 116 14.1.6 Electrical Requirement s 14.1.7 Surge Suppression The static transfer switch is eq uipped with transient voltage surg e suppression on each input for surge suppression. The surge suppress ion is capa ble of protecting th e static transfer switch from operating outside of tolerances du e to surges as defined by IEC 1000-4-5[...]

Specifications 117 14.2.1 Frame and Enclosure The complete STS2/PDU is housed in a freestanding enclosure. The cabinet is a NEMA type 1 enclo- sure. The cabin et is structurally d esigned to hand le lifting fro m the base. The frame is des igned to accommodate floor stands. The distributed floor weight for STS2/PDU is less than 260 lbs./sq. ft. (11[...]

Specifications 118 14.2.4 Access The STS2/PDU is designed so repairs and maintenance can be done from the front, side 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. Th ese components include: • All electro[...]

Specifications 119 14.2.9 RS-232 Port The unit is equipped with an RS-232 port for connect ing a terminal or PC. See Figure 55 fo r the port’s location. See 12.1 - Using the RS-2 32 Port for instructions on using a PC terminal with the unit. 14.2.10 T erminal Port Connections The system has an asynchronous serial port conf igured as Data Terminal[...]

Specifications 120 14.2.1 1 RS-232 Interface Parameters The service terminal interface parameters are the following settings and cannot be changed. 14.2.12 Maintenance Bypass The STS2/PDU is configured to allo w the unit’s electronics to be by passed to either input source for maintenance without interrupt ion of power to the load. The STS2/PDU i[...]

Event Message Help Text 121 15.0 E VENT M ESSAGE H ELP T EXT S1 SCR SHORT Source 1 SCR Short One or more of the SCRs for Source 1 ha s short ed. T ransferring between sources has been inhibited. Contact technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Global[...]

Event Message Help Text 122 S2 SCR OPEN Source 2 SCR Open. One or more SCRs on Source 2 is open. T ransferring between sources has been inhibited. STS2/PDU output has been transferred to So urce 1. Contact technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Glo[...]

Event Message Help Text 123 PWR SPL Y DC A F AIL 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 technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Global Services, if a v[...]

Event Message Help Text 124 PWR SPL Y S2 AC F AIL Power Supply Source 2 AC Failed The AC input power to the power supp lies 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 technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outsi[...]

Event Message Help Text 125 S1 VOL T SENSE F AIL Source 1 V oltage Se nse Module Failed The module cont ained on the snubber moni toring the input volt age from Source 1 has failed. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a terminal, type SH and press RETURN o[...]

Event Message Help Text 126 S2 SCR SENSE F AIL Source 2 SCR Sense Module Failed The module cont ained on the snubber monitoring the SCRs for Source 2 has failed . Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a terminal, type SH and press RETURN on your keyboard to [...]

Event Message Help Text 127 S2 GA TE DRIVE F AIL Source 1 Gate Drive Failure The gate drive module for an SCR fo r Source 2 has failed . Th is module is cont ained on the left side ga te driver board. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a terminal, type SH[...]

Event Message Help Text 128 CB2 SHUNT TRIP F AIL Circuit Breaker 2 Shunt T rip Failure Circuit Breaker 2 failed to trip open when the control issued a command for the circuit breaker to trip. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a terminal, type SH and pres[...]

Event Message Help Text 129 HEA T SINK OVER TEMP Heat Sink Over T emperature The system heat sink temperature has exceed ed the design limits. T ake immediate ste ps to cool the uni t. Remove obstructions from the air in let in the front of the unit. Remove and replace the air filter behind the fro nt door . A standard furnace filter can be used. P[...]

Event Message Help Text 130 S1 OV Source 1 Ov er V oltage. The input voltage from Sou rce 1 exceeded a set percentage of the nominal volt age, as set in the OV Setting and OV Detection Delay setpoint s configured under the User Settings. An S1 Fail ala rm was also issued and source tran sferhas be en inhibited . The load of the STS2/PDU has been tr[...]

Event Message Help Text 131 S2 UV (RMS) Source 2 Under V oltage (slow detection). The input voltage from Source 2 remained below a set percentage of th e nominal voltage for a desig nated period, as set in the Slow UV Setting and Slow UV De tection Delay setpoi nts configured unde r the User Set- tings. An S2 Fail alarm was also issued and source t[...]

Event Message Help Text 132 S2 F AIL Source 2 Failu re Source 2 has failed due to under volt age (UV), over voltag e (OV) or running with an over or under freq uency (OF/UF). This alarm is a companion to S2 UV , S2 UV (RMS), S2 OV and S2 OF/UF . The load of the STS2/PDU has been transferred to Source 1. Press SILENCE on the touch screen to turn of [...]

Event Message Help Text 133 S1 I-PEAK Current Peak on Source 1 The peak current from Source 1 has exceeded the setpoi nt as defined in the I- PK Xfer Lockout setting und er User Settings. T ransferring to Source 2 has been inhibite d. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/P[...]

Event Message Help Text 134 LOAD ON AL T SOURCE STS2/PDU load on the alte rnate source . The S tatic T ransfer Switch 2 Power Distribution Unit is running on the alternate powe r source. Check the Event Log to determine the reason for the transfer from the preferred source. Another event has caused th e system to transfer to the alternate source. T[...]

Event Message Help Text 135 CB2 (S2) OPEN Circuit Breaker 2 (for Sou rce 2) Open Circuit Breaker 2 is not closed. CB 1 is only assigne d to Source 2 . Check that the Circuit Br eaker 2 s witch is in the desired position. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from[...]

Event Message Help Text 136 CB3A (OUTPUT) OPEN Circuit Breaker 3A (Outpu t breaker) is Open (Optio nal) 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 S tatic T rans fer Switch 2 Power Distribution Unit. Press SILENCE on the touch screen to turn of f the audi[...]

Event Message Help Text 137 OUTPUT UV Output Undervoltage The voltage be ing supplied to the load has dropped below the accept able nominal voltage . Check the input voltage from both sources. This event and the system status surrounding it h ave been written to a History Log if the History Logs were not already full. This event was also writte n t[...]

Event Message Help Text 138 INPUT 2 OVERVOL T AGE Input 2 Overvoltage Source 2 is ov er voltage. Contact technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Global Services, if a v ailable in your area. For inte rnational areas not covered by Liebert Global Ser[...]

Event Message Help Text 139 NEUTRAL OVERCURRENT Neutral Overcurremt Neutral is ov er curremt. Contact technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Global Services, if a v ailable in your area. For inte rnational areas not covered by Liebert Global Servic[...]

Event Message Help Text 140 INPUT 1 OF/UF Input 1 Over Frequen cy/Under Frequency Source 1 is over fr equency/under frequency Contact technical support; in the United S tates, call 1-800-LIEBER T (1-800-543-2378 ). Outside the 48 contigu- ous United S tates cont act Liebert Global Services, if a v ailable in your area. For inte rnational areas not [...]

Event Message Help Text 141 INPUT CONT ACT #3 Input Contact Isolator #3 Occurrence of the indica ted exter nal event ha s been de tected by Input Contact Isolator #3 o f the Open Comms Digital Input option boa rd. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a term[...]

Event Message Help Text 142 INPUT CONT ACT #7 Input Contact Isolator #7 Occurrence of the indica ted exter nal event ha s been de tected by Input Contact Isolator #7 o f the Open Comms Digital Input option boa rd. Press SILENCE on the touch screen to turn of f the audible alarm, if so configured. If you are accessing the STS2/PDU system from a term[...]

Event Message Help Text 143 HIST LOGS CLEARED History Logs Cleared Both History Logs have been erased and the logs are now availa ble to record future event s. The event was written to the Eve nt Log, if so configured. TRANSFER COUNTER CLEARED T ransfer Counter Cleared T ransf er counter reset to 0 Contact technical support; in the United S tates, [...]

Maintenance 144 16.0 M AINTENANCE Minimal periodic maintenanc e of the STS2/PD U is required. As wi th a ll electrical distribution compo- nents, the system should be regularly inspected for electrical connection integr ity, signs of excessive temperatures, dirt accumulation and proper system operation. 16.1 Proper T ightening of Nuts and Bolt s Th[...]

Customer Settings 145 17.0 C USTOMER S ETTINGS 17.1 Programmable Relay Board Settings 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 STS2/PDU has the PRB option[...]

Customer Settings 146 17.2 Input Cont act Isolator Settings The Input Contact Isolator board (ICI) provides an STS2/PDU module interfac e for up to eight exter- nal user alarm or message inputs to be routed through the Static Transfer Switch 2 Power Distribu- tion Unit’s alarm network. See 6.2 - Input Contact Isolator Board for more information o[...]

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The Comp any Behind the Products With over a million installations around th e globe, Liebert is the world leader in computer protection systems. Since its founding in 1965, Liebert has developed a complete range of support and protection systems fo r sensitive electronics: • Environment al systems—close-control air conditioning from 1 to 60 to[...]