Liebert PDUTM User Manual

POWER DISTRIBUTIONSTS2/PDU™INSTALLATION, OPERATION & MAINTENANCE MANUAL250A - 800AThree Phase60 Hz

2A thorough equipment inspection and supervised start-up by qualified service personnel are strongly recommended at these times:1. Before unit is plac

Communication Interfaces9212.1.3 Setting Bitpacked Options With the TerminalFive sets of options and features settings are available through the termi

Communication Interfaces93Critical Option Enabling• bit0—EnableManual_IPeakReset• bit1—EnableAutoRestart• bit2 through bit15 - not used (set to 0)Non-

Communication Interfaces94Putting the Terminal Command TogetherFor example, a unit only has the Remote Source Selection and Dual-Output Breaker option

Communication Interfaces95Examples of Event Mask Settings• To latch event #001, S1 SCR SHORT, use SPT 4 1 +L.• To disable event #128, CONFIG MODIFIED,

Touch Screen Display9613.0 TOUCH SCREEN DISPLAYThe STS2/PDU can be configured with a Color Graphical LCD touch screen display that allows you to quick

Touch Screen Display9713.2 Menu OverviewThe touch screen menu provides access to configuration settings and more device information.The CONFIG (Config

Touch Screen Display9813.2.1 SecurityBecause the STS2/PDU Color Graphical Display provides access to various configuration and moni-toring choices, a

Touch Screen Display9913.3 Mimic DisplayThe Mimic display provides a color diagram of the operation of the STS2/PDU. This display imitates the power f

Touch Screen Display100Event MasksThe STS2/PDU gathers, processes and reports faults and alarms, collectively referred to below as events. The Event M

Touch Screen Display101User SettingsThe User Settings choice allows you to adjust the user-accessible switch settings. Access is limited to qualified

Unpacking and Inspections31.0 UNPACKING AND INSPECTIONSA high-quality installation begins on the receiving dock. The STS2/PDU and its packaging should

Touch Screen Display102To configure the setpoints for each source:1. Select SOURCE 1/2 SETPOINTS from the User Settings dialog box. The Source 1/2 Set

Touch Screen Display1038. Select FREQUENCY TRIP POINT. A keypad is displayed.This choice verifies that the source is running at the proper frequency.

Touch Screen Display104PDU SetpointsThe PDU Setpoints option allows you to configure the following parameters for the PDU, shown in Figure 69.• Load V

Touch Screen Display105Comm OptionsThe Comm Options dialog box allows you to configure the communications settings for the STS2/PDU.• Select COMM OPTI

Touch Screen Display106To configure the modem:1. Select MODEM from the Comm Options menu. The Modem dialog box is displayed.Figure 71 Modem dialog box

Touch Screen Display10712. Configure AUTO DIAL IN. Auto Dial In allows a user to dial into the STS2/PDU through the modem to check status and access t

Touch Screen Display108Configuring the Input Contact Isolator SettingsThe Input Contact Isolator (ICI) is an optional, eight-channel input board for u

Touch Screen Display1095. Select DELAY.A keypad is displayed prompting you for a delay time, in seconds, for a condition to exist before the alarm is

Touch Screen Display110To configure your programmable relay boards for user defined settings:1. Select PROG. RELAY BOARD # x from the Comm Options dia

Touch Screen Display111SiteScan ConfigurationAn RS-422 port on the optional Comms Board provides communications with Liebert’s SiteScan. SiteScan is L

Unpacking and Inspections41.2.1 Handling ConsiderationsThe STS2/PDU is bolted to a wood shipping pallet to allow handling by forklift equipment or a p

Touch Screen Display112PDUThis selection is set at the factory to YES, which allows the LCD to draw the Mimic accordingly and display PDU metering and

Touch Screen Display11313.7.1 LogsTwo types of logs are kept by the STS2/PDU: Event Log and History Log.Event LogThe Event Log tracks the alarms and f

Touch Screen Display114To 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 f

Specifications11514.0 SPECIFICATIONS14.1 System ConfigurationThe STS2/PDU can be set in several different configurations, according to the model and l

Specifications11614.1.6 Electrical Requirements14.1.7 Surge SuppressionThe static transfer switch is equipped with transient voltage surge suppression

Specifications11714.2.1 Frame and EnclosureThe complete STS2/PDU is housed in a freestanding enclosure. The cabinet is a NEMA type 1 enclo-sure. The c

Specifications11814.2.4 AccessThe STS2/PDU is designed so repairs and maintenance can be done from the front, side or top of the unit. All components

Specifications11914.2.9 RS-232 PortThe unit is equipped with an RS-232 port for connecting a terminal or PC. See Figure 55 for the port’s location. Se

Specifications12014.2.11 RS-232 Interface ParametersThe service terminal interface parameters are the following settings and cannot be changed.14.2.12

Event Message Help Text12115.0 EVENT MESSAGE HELP TEXTS1 SCR SHORTSource 1 SCR ShortOne or more of the SCRs for Source 1 has shorted. Transferring bet

Location Considerations52.0 LOCATION CONSIDERATIONSThe STS2/PDU should be placed in a clean, cool and dry location. The 250A unit without an output ca

Event Message Help Text122S2 SCR OPENSource 2 SCR Open.One or more SCRs on Source 2 is open. Transferring between sources has been inhibited.STS2/PDU

Event Message Help Text123PWR SPLY DC A FAILPower Supply DC Bus A FailedThe primary power supply is no longer providing DC power to the control board

Event Message Help Text124PWR SPLY S2 AC FAILPower Supply Source 2 AC FailedThe AC input power to the power supplies from Source 2 has failed. The pow

Event Message Help Text125S1 VOLT SENSE FAILSource 1 Voltage Sense Module FailedThe module contained on the snubber monitoring the input voltage from

Event Message Help Text126S2 SCR SENSE FAILSource 2 SCR Sense Module FailedThe module contained on the snubber monitoring the SCRs for Source 2 has fa

Event Message Help Text127S2 GATE DRIVE FAILSource 1 Gate Drive FailureThe gate drive module for an SCR for Source 2 has failed. This module is contai

Event Message Help Text128CB2 SHUNT TRIP FAILCircuit Breaker 2 Shunt Trip FailureCircuit Breaker 2 failed to trip open when the control issued a comma

Event Message Help Text129HEAT SINK OVERTEMPHeat Sink Over TemperatureThe system heat sink temperature has exceeded the design limits.Take immediate s

Event Message Help Text130S1 OVSource 1 Over Voltage.The input voltage from Source 1 exceeded a set percentage of the nominal voltage, as set in the O

Event Message Help Text131S2 UV (RMS)Source 2 Under Voltage (slow detection).The input voltage from Source 2 remained below a set percentage of the no

Location Considerations62.4 AltitudeThe standard units are designed for full load operation up to 4000 feet (1200m) above sea level. See Figure 1 for

Event Message Help Text132S2 FAILSource 2 FailureSource 2 has failed due to under voltage (UV), over voltage (OV) or running with an over or under fre

Event Message Help Text133S1 I-PEAKCurrent Peak on Source 1The peak current from Source 1 has exceeded the setpoint as defined in the I-PK Xfer Lockou

Event Message Help Text134LOAD ON ALT SOURCESTS2/PDU load on the alternate source.The Static Transfer Switch 2 Power Distribution Unit is running on t

Event Message Help Text135CB2 (S2) OPENCircuit Breaker 2 (for Source 2) OpenCircuit Breaker 2 is not closed. CB1 is only assigned to Source 2.Check th

Event Message Help Text136CB3A (OUTPUT) OPENCircuit Breaker 3A (Output breaker) is Open (Optional)Circuit breaker 3A is not closed. This circuit break

Event Message Help Text137OUTPUT UVOutput UndervoltageThe voltage being supplied to the load has dropped below the acceptable nominal voltage. Check t

Event Message Help Text138INPUT 2 OVERVOLTAGEInput 2 OvervoltageSource 2 is over voltage.Contact technical support; in the United States, call 1-800-L

Event Message Help Text139NEUTRAL OVERCURRENTNeutral OvercurremtNeutral is over curremt.Contact technical support; in the United States, call 1-800-LI

Event Message Help Text140INPUT 1 OF/UFInput 1 Over Frequency/Under FrequencySource 1 is over frequency/under frequencyContact technical support; in t

Event Message Help Text141INPUT CONTACT #3Input Contact Isolator #3Occurrence of the indicated external event has been detected by Input Contact Isola

Locating The STS2/PDU73.0 LOCATING THE STS2/PDUThis section provides instructions for leveling the STS2/PDU and anchoring the unit to the floor, shoul

Event Message Help Text142INPUT CONTACT #7Input Contact Isolator #7Occurrence of the indicated external event has been detected by Input Contact Isola

Event Message Help Text143HIST LOGS CLEAREDHistory Logs ClearedBoth History Logs have been erased and the logs are now available to record future even

Maintenance14416.0 MAINTENANCEMinimal periodic maintenance of the STS2/PDU is required. As with all electrical distribution compo-nents, the system sh

Customer Settings14517.0 CUSTOMER SETTINGS17.1 Programmable Relay Board SettingsThe optional programmable relay board (PRB) has eight channels to repo

Customer Settings14617.2 Input Contact Isolator SettingsThe Input Contact Isolator board (ICI) provides an STS2/PDU module interface for up to eight e

The Company Behind the ProductsWith over a million installations around the globe,Liebert is the world leader in computer protectionsystems. Since its

Power and Control Wiring84.0 POWER AND CONTROL WIRINGAll power and control wiring must be installed by a licensed, qualified electrician. All power an

Power and Control Wiring9Figure 3 Typical STS2/PDU, one-line diagramFigure 4 Typical STS2/PDU, one-line diagram, with dual static switch output circui

Power and Control Wiring10Figure 5 Typical STS2/PDU, one-line diagram, with inline distribution, dual static switch output circuit breakersFigure 6 Ty

Power and Control Wiring114.2 System GroundingEquipment grounding—Grounding is primarily for equipment and personnel safety, although proper grounding

CONTACTING LIEBERT FOR SUPPORTTo contact Liebert Global Services for information or repair service in the United States, call 1-800-LIEBERT

Power and Control Wiring124.5 Power SupplyThe STS2/PDU is supplied with redundant power supplies that are designed to operate from a voltage range of

Output Power Wiring135.0 OUTPUT POWER WIRINGThe STS2/PDU standard model is provided with a circuit breaker for connecting to the load or a remote dist

Options146.0 OPTIONSThis section discusses the options available for the STS2/PDU. The communications options are also discussed in 12.0 - Communicati

Options156.3 Comms BoardThe Comms Board provides a communication interface to Liebert SiteScan, site monitoring product and/or an external or internal

Options166.6 Remote Source SelectionThe Remote Source Selection allows the preferred input source to be chosen from a remote location. A user supplied

Installation Drawings177.0 INSTALLATION DRAWINGSFigure 7 Outline drawing, 250A STS2/PDU

Installation Drawings18Figure 8 Outline drawing, 250A STS2/PDU with right side I-Line distribution

Installation Drawings19Figure 9 Outline drawing, 250A STS2/PDU with right side inline distribution

Installation Drawings20Figure 10 Outline drawing, 250A STS2/PDU with left side I-Line distribution

Installation Drawings21Figure 11 Outline drawing, 250A STS2/PDU with left side Inline distribution

iTABLE OF CONTENTSCONTACTING LIEBERT FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVERIMPORTANT SAFETY INST

Installation Drawings22Figure 12 Outline drawing,400-600A STS2/PDU with right side inline distribution

Installation Drawings23Figure 13 Outline drawing, 400-600A STS2/PDU with right side output breaker or I-Line distribution

Installation Drawings24Figure 14 Outline drawing, 400-600A STS2/PDU with left side inline distribution

Installation Drawings25Figure 15 Outline drawing, 400-600A STS2/PDU with left side output breaker or I-Line distribution

Installation Drawings26Figure 16 Outline drawing, 800A STS2/PDU with right side output breaker or I-Line distribution

Installation Drawings27Figure 17 Outline drawing, 800A STS2/PDU with right side inline distribution

Installation Drawings28Figure 18 Outline drawing, 800A STS2/PDU with left side output breaker or I-Line distribution

Installation Drawings29Figure 19 Outline drawing, 800A STS2/PDU with left side inline distribution

Installation Drawings30Figure 20 Outline drawing, 250A STS2/PDU with key lockout switch option

Installation Drawings31Figure 21 Outline drawing, 400-600A STS2/PDU, inline distribution, right side with key lockout switch option

ii8.0 INTRODUCTION TO STS2/PDU OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .698.1 System Description. . . . . . . .

Installation Drawings32Figure 22 Outline drawing, 800A STS2/PDU, inline distribution, right side with key lockout switch option

Installation Drawings33Figure 23 Electrical field connections, 250A STS2/PDU input/output with CB8

Installation Drawings34Figure 24 Electrical field connections, 250A STS2/PDU input with CB3

Installation Drawings35Figure 25 Electrical field connections, 250A STS2/PDU input with CB3 & CB3A

Installation Drawings36Figure 26 Electrical field connections, 400-600A STS2/PDU input with CB3

Installation Drawings37Figure 27 Electrical field connections, 400-600A STS2/PDU input with CB3 and CB3A

Installation Drawings38Figure 28 Electrical field connections, 800A STS2/PDU input with CB3

Installation Drawings39Figure 29 Electrical field connections, 800A STS2/PDU input with CB3 and CB3A

Installation Drawings40Figure 30 Electrical field connections, 250A STS2/PDU output with inline panelboards

Installation Drawings41Figure 31 Electrical field connections, 400-800A STS2/PDU output with inline panelboards

iii12.0 COMMUNICATION INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8712.1 Using the RS-232 Por

Installation Drawings42Figure 32 Electrical field connections, STS2/PDU output with I-Line panelboard

Installation Drawings43Figure 33 Electrical field connections, 400-600A STS2/PDU with right side output breaker

Installation Drawings44Figure 34 Electrical field connections, 400-600A STS2/PDU with left side output breaker

Installation Drawings45Figure 35 Electrical field connections, 800A STS2/PDU with right side output breaker

Installation Drawings46Figure 36 Electrical field connections, 8600A STS2/PDU with left side output breaker

Installation Drawings47Figure 37 Electrical field connections, 800A STS2/PDU interconnect wiring

Installation Drawings48Figure 38 Electrical field connections, 800A STS2/PDU interconnect wiring, breaker section

Installation Drawings49Figure 39 Electrical field connections, 800A STS2/PDU interconnect wiring, STS section

Installation Drawings50Figure 40 Electrical field connections, 800A STS2/PDU interconnect wiring, left side distribution cabinet

Installation Drawings51Figure 41 Electrical field connections, 800A STS2/PDU interconnect wiring, left side one-line

iv15.0 EVENT MESSAGE HELP TEXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12116.0 MAINTENANCE . . . . .

Installation Drawings52Figure 42 Electrical field connections, 800A STS2/PDU interconnect wiring, left side one line with CB3A

Installation Drawings53Figure 43 Electrical field connections, 800A STS2/PDU interconnect wiring, right side one line

Installation Drawings54Figure 44 Electrical field connections, 800A STS2/PDU interconnect wiring, right side one line with CB3A

Installation Drawings55Figure 45 Control wiring, 800A STS2/PDU, left side distribution

Installation Drawings56Figure 46 Control wiring, 800A STS2/PDU, right side distribution

Installation Drawings57Figure 47 Control connection location, 250A STS2/PDU

Installation Drawings58Figure 48 Control connection location, 400-800A STS2/PDU

Installation Drawings59Figure 49 Control location drawing conduit box, top entry, 400-600A STS2/PDU

Installation Drawings60Figure 50 Control wiring for the programmable relay board option

Installation Drawings61Figure 51 Control wiring for the input contact isolator board option

vFigure 36 Electrical field connections, 8600A STS2/PDU with left side output breaker. . . . . . . . . . . . . . . . 46Figure 37 Electrical field con

Installation Drawings62Figure 52 Control wiring for comms board

Installation Drawings63Figure 53 Control wiring for the internal modem option

Installation Drawings64Figure 54 Control wiring for the Network Interface Card (NIC) option

Installation Drawings65Figure 55 Control wiring for the RS-232 Port

Installation Drawings66Figure 56 Control wiring for remote source selection option

Installation Drawings67Figure 57 Color LCD touch screen display

Installation Drawings68Table 9 Input circuit breaker schedule, 250-800ASTS2/PDURatingSTS2/PDUInput VoltsCircuit Breakers(See One-LineDiagrams) Vendor

Introduction to STS2/PDU Operations698.0 INTRODUCTION TO STS2/PDU OPERATIONS8.1 System DescriptionA STS2/PDU provides an automatic, seamless transfer

Introduction to STS2/PDU Operations708.1.2 Reliability and Agency RequirementsThe STS2/PDU is designed for high reliability and high availability with

Introduction to STS2/PDU Operations718.2.2 TransferShould the preferred source fail or be outside acceptable voltage limits, the STS2/PDU transfers th

viTABLESTable 1 Shipping weights (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory of Operation729.0 THEORY OF OPERATION9.1 General DescriptionThe STS2/PDU contains all the equipment necessary to prevent an interruption in pow

Theory of Operation739.1.4 Emergency TransferTo ensure that power remains connected to the load, the STS2/PDU automatically performs an emer-gency tra

Theory of Operation74FirmwareThe operator interface enables you to monitor the STS2/PDU, to configure setpoints for transfers, monitor system paramete

Operating Instructions7510.0 OPERATING INSTRUCTIONSAfter the initial equipment start-up, the following operating guidelines can be used for standard e

Operating Instructions764. Close CB1.5. Verify that Source 1 voltages are nominal and that CB1 breaker status is correctly indicated on the Monitor/Mi

Operating Instructions77Figure 60 Source Transfer screenTo manually select the preferred source:1. Close the input breakers CB6, CB7, CB1 and CB2.2. S

Operating Instructions7810.4 Maintenance BypassThe STS2/PDU is equipped with two key-interlocked, bypass breakers, CB4 and CB5, to allow man-ual bypas

Operating Instructions7910.4.1 Bypass Procedures for Source 1To bypass the switch for Source 1:1. Verify Source 1 is supplying power via the Mimic.• I

Operating Instructions8010.4.2 Bypass Procedures for Source 2To bypass the switch for Source 2:1. Verify Source 2 is supplying power via the Mimic.• I

Operating Instructions8110.5.2 Shutdown in Maintenance Bypass ModeWhen the Static Transfer Switch 2 Power Distribution Unit is operating on bypass:1.

1IMPORTANT SAFETY INSTRUCTIONSSAVE THESE INSTRUCTIONSThis manual contains important instructions that should be followed during the installation and m

Alarms and Faults8211.0 ALARMS AND FAULTSAlarms and faults are events that are triggered when the operation of the Static Transfer Switch 2 Power Dist

Alarms and Faults8311.2 Event and History LogsThe system tracks events through the Events Log and tracks significant events through the History Logs.

Alarms and Faults8411.2.2 History LogWhen a designated major alarm occurs, the History Status buffer is frozen, capturing 64 sequential frames before

Alarms and Faults85Table 12 Event messagesID Alarm Message Description/Cause Action1 S1 SCR SHORT One or more of the SCRs for Source 1 have shorted an

Alarms and Faults8681 SOURCES OUT OF SYNC Source 1 and Source 2 are out of synchronization. A, E82 LOAD ON ALT SOURCE The output load is running on th

Communication Interfaces8712.0 COMMUNICATION INTERFACESThe STS2/PDU monitoring system offers several choices for communications.The RS-232 terminal po

Communication Interfaces8812.1 Using the RS-232 PortThe RS-232 port is configured with a baud rate of 9600 with 8 Data Bits, 1 Stop Bit, No Parity and

Communication Interfaces8912.1.2 Configuring the STS2/PDU via the TerminalThe SPT command is used to configure the systems setpoints. The SVT syntax f

Communication Interfaces90Value ParameterItem settings, depending on what they are, use various value types.Table 14 provides a list of the possible v

Communication Interfaces91Table 15 shows the various groups, the settings contained within and the type of value it requires.Table 15 Group settings a