Automatic Transfer Switch Controller, ATC-900 Controller .

Technical Data TD140001ENATC-900 Automatic Transfer Switch ControllerEffective November 2013ATC-900 programmable set pointsTable 3 lists only controller features; switch features are not listed,as they are defined by switch construction. Transition settings arespecific to the transfer switch construction.Table 3. Features and set pointsOptionnumber DescriptionGeneral settings—Set new password—Selected language—Nominal frequency—Nominal voltage—Number of phases—Number of generators—Preferred source—PT ratio—CT ratio—Daylight Saving Time—Operating mode—Phase sequence check—Commitment to transfer in TDNE—Manual retransfer—Modbus address—Modbus baud rateTransition settings47Closed transitionClosed transition On or OffClosed voltage differenceClosed frequency difference32f/32d Open—in-phase transitionIn-phase On or OffIn-phase frequencydifference—Synchronization timer32a/32d Open—delayed transitionTime delay neutralLoad voltage decayTime delays1aTime delay normal to emergency3aTime delay emergency to normal35ATime delay pre-transfer35CTime delay post-transfer2ATime delay engine 1 start—Time delay engine 2 start4ATime delay engine cool-off7ATime delay engine fail timer—Voltage unbalance time delayRangeFactorydefault0000–9999English, French or Spanish50 or 60 Hz110–600V1 or 30, 1 or 2Source 1 or Source 22:1–500:1200–5000On or OffStand-alone/Master or SlaveABC, CBA or OffYes or NoAuto, Manual or External1–2470 9600, 1, Even1 9600, 1, Odd2 9600, 2, None3 9600, 1, None4 19,200, 1, Even5 19,200, 1, Odd6 19,200, 2, None7 19,200, 1, None0900EnglishAs orderedAs orderedAs ordered1Source 1As ordered—1MasterOffNoAs ordered19600———————On or Off1–5%0.0–0.3 HzAs ordered2%0.3Disable, in-phase defaultto alarm, in-phase defaultto open transition0.0–3.0 HzAs ordered1–60 minutes50–120 seconds2–30% of nominal voltage06%0–9999 seconds0–9999 seconds0–120 seconds0–120 seconds0–120 seconds0–120 seconds0–9999 seconds0–6 seconds10–30 e 3 is continued in column 2 of this page.4EATON CORPORATION www.eaton.comSource settings26PSource 1 undervoltage dropoutSource 1 undervoltage pickup70–97% of nominal80%(dropout 2%) to 99%90%of nominal5PSource 2 undervoltage dropout70–97% of nominal80%Source 2 undervoltage pickup(dropout 2%) to 99%90%of nominal26KSource 1 overvoltage dropout105–120% of nominal115%(0 disabled)Source 1 overvoltage pickup103% of nominal to105%(dropout - 2%) (0 disabled)5KSource 2 overvoltage dropout105–120% of nominal115%(0 disabled)Source 2 overvoltage pickup103% of nominal to105%(dropout - 2%) (0 disabled)26JSource 1 underfrequency dropout 90–97% of nominal94%(0 disabled)Source 1 underfrequency pickup (dropout 1 Hz) to 99%96%of nominal (0 disabled)5JSource 2 underfrequency dropout 90–97% of nominal94%(0 disabled)Source 2 underfrequency pickup (dropout 1 Hz) to 99%96%of nominal (0 disabled)26NSource 1 overfrequency dropout 103–110% (0 disabled)106%Source 1 overfrequency pickup101% to (dropout - 1 Hz)104%(0 disabled)5NSource 2 overfrequency dropout 103–110% (0 disabled)106%Source 2 overfrequency pickup101% to (dropout - 1 Hz)104%(0 disabled)26LSource 1 percent for unbalanced 5–20% of phase-to-phase12%voltage dropoutvoltage unbalance(0 disabled)Source 1 percent for unbalanced 3% to (dropout - 2%)10%voltage pickup(0 disabled)5LSource 2 percent for unbalanced 5–20% of phase-to-phase12%voltage dropoutvoltage unbalance(0 disabled)Source 2 percent for unbalanced 3% to (dropout - 2%)10%voltage pickup(0 disabled)Engine test/plant exerciser (PE1 and PE2 are independently programmable)6BEngine test pushbutton on panelTest modeNo load, load transfer,LoaddisabledtransferEngine run test time0–600 minutes23MPE time delay normal0–9999 seconds1 minuteto emergencyPE time delay emergency0–9999 seconds1 minuteto normalPE time delay engine cooldown 0–9999 seconds5 minutesPE1/PE2 test modeNo load, load transfer,DisableddisabledPE1/PE2 run time0–600 minutes30 minutesPE1/PE2 scheduleOff, daily, 7-day, 14-day,28-day or calendar date(up to 12 user-specified dates)PE1/PE2 calendar dateMonth: 1–12; Day: 1–31PE1/PE2 day of week1 Sunday, 2 Monday,3 Tuesday, 4 Wednesday,5 Thursday, 6 Friday or7 SaturdayPE1/PE2 plant start timeHH:MM AM/PMAccessory I/O—Accessory I/O modules0–4—

Technical Data TD140001ENATC-900 Automatic Transfer Switch ControllerEffective November 2013Flexible configurationDesigned for scalability, the ATC-900 can be configured for a widevariety of applications. A mix-and-match approach to features allowsthe user to build a transfer switch controller that meets the preciseapplication needs.The ATC-900 controller includes 4 user configurable inputs andoutputs. The inputs and outputs can be assigned functions froma predefined list of options either at the factory or in the field. Inputs Monitor mode Outputs (control) Load sequence Bypass timers Selective load shed Lockout Load bank control Manual retransfer On or Off Pre/post transfer Manual retransfer Pre transfer Slave in Post transfer Remote engine test User remote control Preferred source selection Go to emergency Source 1 available (standard) Emergency inhibit Source 2 available (standard) ATS on bypass Source 1 connected Go to neutral Source 2 connected ATS not in automaticCurrent inputs General alarm ATS in test Engine test aborted Cooldown in process Engine start contact status Generator 1 start status Generator 2 start status Emergency inhibit on ATS on bypass Outputs (status/alarms)Additional I/O can be added at any time by adding an externalI/O module. Each I/O module contains 4 inputs and outputs andup to 4 modules can be daisy chained to the ATC-900 controller.Figure 3. DCT module attachedVoltage inputs (measurement category) Range: universal, auto-ranging up to 416 Vac L-N, 721 Vac L-LSupported hookups: 3-Element Wye or DeltaInput impedance: 2m ohm/phaseBurden: 0.0022 VA/phase at 120VFault withstand: meets IEEET C37.90.15A nominal, 10A maximumBurden: 0.005 VA per phase maximum at 11APickup current: 0.1% of nominalConnections: Screw terminalsMax input wire gauge: AWG #12/2.5 mm 2Fault withstand: 100A/10 seconds, 300A/3 seconds,500A/1 secondIsolation All inputs are isolated to 2600 VacMeasurement methods Voltage, current: true RMS Power: sampling at 64 samples per cycle on all channelsmeasured readings simultaneously A/D conversion: 16 simultaneous 12 bit analog to digitalconvertersTable 4. Current voltage frequency metering dataI/O module: The ATC-900 optional I/O module provides users with fouradditional assignable inputs and outputs. Up to four I/O modules can beadded to an ATC-900 controller providing a total of 20 inputs and outputs.Current meteringUnitsAccuracyNotesIA, IB, ICAmperes 1% of reading—Voltage meteringUnitsAccuracyNotesVAB, VBC, VCAVolts 1% of readingLine-to-line voltageFrequency meteringUnitsAccuracyNotesFrequencyHz 0.2 Hz of readingRange is 20–255 HzMeteringTable 5. Power and energy metering dataOptional metering requires the addition of a DCT module. The DCTmodule mounts directly on the back of the controller.Power meteringUnitsAccuracyNotesPowerkW 2% of readingkVAkVA 2% of readingkVARkVAR 2% of readingPF (power factor)—0 to 1.00Approximately1-second updateApproximately1-second updateApproximately1-second update—The DCT module incorporates a current transformer interfaceto the ATC-900 allowing current to be metered along with voltageand frequency. Combined with the ATC-900, the DCT module servesas a multifunction power meter and provides measurement of thelisted electrical parameters. Readings are displayed on the ATC-900controller display or can be monitored through Modbus 485.EATON CORPORATION www.eaton.com5

Technical Data TD140001ENATC-900 Automatic Transfer Switch ControllerEffective November 2013Diagnostics and troubleshootingEvents include:In a mission-critical application, a failure to transfer to the backuppower system requires quick and decisive action. Eaton’s ATC-900controller provides users with the data required to quickly identifythe root cause of a backup power system failure and minimize system downtime. This data allows the user to identify a specific eventand obtain the detailed event information including a step by stepbreakdown of the transfer sequence. Historical dataTime-stamping resolution of 1 second. Actions of the transfer sequenceAlarmsChanges to the set pointsChanges to the time/dateResetting a historical counterEngine run testEvent detailsFigure 4. Historical data displayThe historical data display indicates historical and cumulative countervalues as follows: Source 1 availableSource 1 connectedSource 1 engine runSource 2 availableSource 2 connectedSource 2 engine runTier IV timerLoad energizedNumber of transfersFigure 6. Event details displayEach transfer event can be exploded to view a step by step, timestamped, sequence of operation for a transfer event. All meteredvalues are also logged for each event and can be viewed on theevent data screen.Time stamping resolution of 0.1 seconds.Hi-speed captureHistorical counter resets are date and time stamped events that arecaptured in the event log.Event summaryFigure 7. High speed capture display, pre and post eventThe ATC-900 stores metered data updated on a continuous 20millisecond basis for specific events. The data is captured 2 secondsbefore and 2 seconds after the event (except for a power failure, whichis 4 seconds before). Oscillographic data for 10 events is stored in thecontroller and may be downloaded over USB or displayed graphically.Events Include:Figure 5. Event summary displayThe ATC-900 controller stores 100 transfer summaries, 350 transferdetails, 100 alarms, and 20 time adjustments.1. Source unavailability actions that initiate a transfer sequence(undervoltage, overvoltage, etc.)2. Successful transfers (at the point of breaker/contactor closure)3. Unsuccessful transfers (at the point of breaker/contactor failureto close or open)6EATON CORPORATION www.eaton.com

Technical Data TD140001ENATC-900 Automatic Transfer Switch ControllerEffective November 2013Industry standard communication protocolUSB programming portEvery ATC-900 controller includes a standard Modbus RTU communications interface with an option to upgrade to Modbus TCP/IP.Every ATC-900 transfer switch includes a front panel, NEMA 4Xrated USB port for use in configuring set points or downloadingevent data to a USB flash drive. To reduce the time spent on sitefor commissioning, set points can be configured at a PC using theATC-900 configuration software and saved to a USB flash drive tobe uploaded to one or multiple controllers. Set points are also easilycopied from one controller to another.The ATC-900 is also compatible with Eaton’s Power XpertT Gatewayfor web-based monitoring, Modbus TCP/IP, SNMP, or BACnetT/IP. ThePower Xpert Gateway can be used to consolidate data from up to 64devices, including communications ready transfer switch controllers,trip units, and meters, as well as other Eaton devices. Versions ofthe Power Xpert Gateway include email event notification and datalogging functionality.HMi Remote Annunciator and ControllerDownloading event capture data provides the user the ability tomore thoroughly analyze high speed capture data using a PC, ordata can be emailed to Eaton’s Technical Support Team when offsitetroubleshooting support is required.The HMi Remote Annunciator and Controller monitors andcontrols up to eight transfer switches on a 7" LCD touchscreen.It is compatible with either Modbus RTU or Modbus TCP/IPprotocols. A basic mimic bus for each transfer switch displayssource availability, source connected and preferred source. Userscan drill down to metered source values and event history for eachtransfer switch. All control features are password-protected andinclude engine test, transfer to emergency (peak shaving), manualre-transfer, and bypass time delays.Power Xpert ArchitecturePower Xpert softwareWeb terminalInternetEthernetEthernet switchThird-partyGatewayPower Xpert Gateway:supports up to 64 devicesHMi remote annunciatorand controllerIQ250/260ATC-900ATC-300 Power Xpert meterATC-900Figure 8. Power Xpert Architecture with ATC-900EATON CORPORATION www.eaton.com7

Technical Data TD140001ENATC-900 Automatic Transfer Switch ControllerEffective November 2013Dimensions in inches (mm)Special applicationsThree-source ATS control5.00 (127.0)3.63 (92.1)The ATC-900 Master/Slave controller functionality provides the userwith the ability to use two independent transfer switches in threesource systems consisting of a utility and two generator sources.In a three-source system, the Master ATS controls the enginestarting and stopping of the Slave ATS.In the event of a Source 1 power failure, the Master ATS engine startrelay closes signaling the Slave ATS to start both generators. (Note:The Slave ATS requires continuous power using either the DCTModule for a DC power input or a UPS input.) The Master ATS handles all transfer time delays between the utility to generator transfer.If the preferred generator does not start within the programmed timedelay, the Slave ATC-900 will initiate a transfer to the non-preferredgenerator. If “None Preferred” is selected, then both generators willstart and the Slave ATS will transfer to the first generator sourceavailable. The ATC-900 will sense the load is connected to a goodsource and shut down the second generator.S1Utility2.10(53.4)9.31(236.5)S2Gen 2SlaveMaster ATSS1.50(12.7)10.25(260.4)Slave ATSGen 1Top view6.72 (170.7)S2Gen start(Signal to start Gen)LoadFront viewFigure 9. Three-source transfer switch arrangementSide viewFigure 10. ATC-900Load managementThe ATC-900 includes several features to enhance the user’s abilityto manage load while on the alternate source. Integrated load metering: Provides metering data that allowsthe user to monitor energy utilization and manage system loading. Selective load shedding: Selectively drop non-essential loadswhen a user-defined kW level is reached. The transfer switchremains on generator. Load shed to neutral (where ATS construction allows):Provides the ability to load shed to a neutral position froma generator source. Pre/post transfer signals: Provides the ability to stop select loadsduring the transfer process. Load bank disable output: Disengages a load bank if utilitypower is lost during an engine test.Eaton1000 Eaton BoulevardCleveland, OH 44122United StatesEaton.com 2013 EatonAll Rights ReservedPrinted in USAPublication No. TD140001EN / BC-143November 2013Eaton is a registered trademark.All other trademarks are propertyof their respective owners.

— Set new password 0000–9999 0900 — Selected language English, French or Spanish English — Nominal frequency 50 or 60 Hz As ordered — Nominal voltage 110–600V As ordered — Number of phases 1 or 3 As ordered — Number of generators 0, 1 or 2 1 — Preferred source Source 1 or Source 2 Source 1 — PT ratio 2:1–500:1 As ordered