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Series 300
Operator’s
Automatic Transfer Switches
Manual
H–design 600 through 1200 amps
TABLE OF CONTENTS
DANGER is used in this manual to warn of high
section
voltages capable of causing shock, burns, or death.
INSTALLATION .......................... 1
WARNINGisusedinthismanualtowarn
SEQUENCE OF OPERATION ............. 2
of possible personal injury.
TESTING & SERVICE .................... 3
ADJUSTMENTS ......................... 4
CAUTIONisusedinthismanualtowarn
of possible equipmentdamage.
CONTR
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Nameplate Catalog Number Identification TheTransferSwitchnameplateincludesdataforeach A typical Catalog Number is shown below with its specific ASCO Series 300 ATS. Use the ATS only elements explained. The example is for a Series 300 withinthe limits shownonthis nameplate. ATSwithswitchedneutral,3pole,600amp,480 V,in a Type 1enclosure: H300 B 3 600 N 1 C Neutral PhasePoles Amperes Voltage Controller Enclosure 2–singleØ C 208 1–standard C –type1 B–switched 600 L 440 3–threeØ F–type3R C –overlappi
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ASCO Series 300 Automatic Transfer Switches (ATSs) are Standby Systems, NFPA 99 Health Care Facilities, and Listed under Underwriters Laboratories UL 1008 Standard NFPA110EmergencyandStandbyPowerSystems. for Safety for Automatic Transfer Switches. All control featuresare UL Component Recognized,whichassuresthat Rating Label ASCO automatic transfer switches meet OSHA Safety Each automatic transfer switch contains a rating label to Requirementsandwillbe acceptabletoelectricalinspectors. define the
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membrane Controller controls neutral connections power connections Transfer Switch terminalblock TB for engine start and switch position contacts power connections neutral connections 1200amp. sizeintypicalenclosurewithlocationof customer connections
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SECTION1 INSTALLATION Series300AutomaticTransferSwitchesarefactorywired Testing PowerConductors and tested. Installation requires skid removal then Do not connect the power conductors to the ASCO securingtheenclosuretothesupportingfoundation. Series300transferswitchuntiltheyaretested. Installing power cables in conduit, cable troughs and ceiling-sus- pended hangers oftenrequires considerableforce. The Remove the Shipping Skid pulling of cables can damage insulation and stretch or Openthefrontdoo
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INSTALLATION (continued) Engine Starting Contacts Customer connections for engine control contact and TS auxiliary contacts connections are located on terminal block TB which is mounted on the front lower left of the left side of transfer switch. Refer to wiring diagram provided with transfer switch the Series 300 ATS and connect the engine start wires to the appropriate terminals. See Figure 1–1andTable A. TableA.Enginestart COMMON EngineStarting connections. Signals FEATURE 7 5amps,32VDC Termi
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INSTALLATION (continued) FunctionalTest The Functional Test consists of three checks: manual operation,voltagechecks,andelectricaloperation. Do these checks in the order presented to avoid damaging the automatictransferswitch. Read all instructions on the Wiring Diagram and labels affixedtotheautomatictransferswitch. Notethecontrol features that are provided and review their operation beforeproceeding. left side of transfer switch 1–Manual OperationTest Adetachablemaintenancehandleisprovidedonth
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INSTALLATION (continued) observe these lights Figure 1–5. St andard controls and indicators. 2–VoltageChecks Close the normalsource circuit First check nameplate on transfer switch; rated voltage SourceAccepted breaker. The Normal Transfer mustbethesameasnormalandemergencylinevoltages. 1 Switch Position and the Normal Normal Source Accepted lights should Emergency come on. Verify thatthe feeders have been Use an accurate voltmeter to connected to the proper lugs. check phase tophase and 2 phase
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INSTALLATION (continued) observe these lights pressthisbutton Figure 1–6. Standard controls and indicators. 3–ElectricalOperation The normal source must be SourceAccepted available and the generator This procedure will check the electrical opertion of the 1 must be readytostart. AutomaticTransferSwitch. SeeFigure1–6. Normal Check that the Normal Source Emergency Accepted light is on. Press and hold the Transfer Test button untilthe engine starts Transfer Closetheenclosuredoorfirst! 2 Test and ru
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SECTION2 SEQUENCEOFOPERATION Lightsshowpositionof transferswitch. Lightsshowthesourcesaccepted. Lightforbuilt–in TransferToEmergency engineexercisetimer: Thesequenceforloadtransferto ➤ blinksrapidlywhen emergency source beginsautomati- buttonisheld5sec. cally when normal source voltage whilebeingset fallsbelowthepresetdropoutpoint ➤ blinksslowlywhen buttonisreleased(set) or when Transfer Test button is andduring20min. pressed.Anundervoltagecondition exerciseperiod. onanyphaseofthenormalsourceis
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SECTION3 TESTING&SERVICE PREVENTIVE MAINTENANCE DISCONNECTING THE CONTROLLER Reasonable care in preventive maintenance will insure The harness disconnect plugs are furnished for repair purposesonlyandshouldnothavetobeunplugged. Ifthe high reliability and long life for the automatic transfer switch. controller must be isolated, followthese steps carefully. Operate the switch atleast oncea month.Performthis Disconnecting the Plugs four step Electrical Operation Test. This is a test with loadtransf
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(continued) TESTING&SERVICE 1. Opennormalandemergencysourcecircuitbreakers. MANUAL LOADTRANSFER This procedure will manually transfer the load if the 2. Use the maintenance handle to manually operate controllerisdisconnected. transferswitchtotheoppositesource. Seepage1–3, ManualOperationTest. Do notmanually operate the transfer switch 3. If the transfer switch is in the Emergency position until bothpower sources are disconnected: manually start the engine generator and then close open bothcircui
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2 2 4 4 6 6 3 3 1 2 1 2 1 2 1 2 1 1 SECTION4 ADJUSTMENTS Tochangea setting,follow procedureon page4-2. Use Time Delay Adjustment Standard time delays are set to customer specifications Table4-1asaguidetotimedelayvaluesandtheircorre- (ifnonespecified, standardfactorysettingsareused). spondingadjustmentDIPswitchorpotentiometer. Table4-1.TimeDelaySettings FACTORY ADJUSTMENT S3 DIP ADJUSTMENT DESCRIPTION LABELS SETTING RANGE SWITCH POTENTIOMETER 1second Actuator1on O Ovveerrid rrideeM Mo om meen ntt
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(continued) ADJUSTMENTS cover thumb Do notmake any setting changes latch while the controller is energized. HowtoChange aSetting 1. Preventthetransferswitchfromoperatingbydiscon- hook on left side nectingonesourcefirst,thentheother,asfollows: a. If the transfer switch is in the Normalposition, opentheemergencysourcecircuitbreaker.Turn theenginestartingcontroltooff.Thenopenthe normalsourcecircuitbreaker. Figure 4-1. Controller cover latch. b. If the transfer switch is in the Emergency position,op
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5 5 7 7 8 8 8 8 SECTION5 CONTROLFEATURES–ENGINEEXERCISERS Thesetimersperiodicallyexercisetheemergencyengine-generatorplant. Theycanbesettoexercisewithorwithout loadtransfer,ortheycanbecompletelydisabled. Theengine-generatorshouldbeexercisedunderloadonceaweekfora minimumtimeperiodof20minutes,orfollowtherecommendationsoftheengine-generatorsetmanufacturer. Referto page4–2forlocationofDIPswitches,battery(provided),andjumperblockinthecontroller. BUILT–INENGINE EXERCISER DIPSwitchSettings The engine e
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5 5 7 7 8 8 CONTROL FEATURES (continued) Optional Accessory 11BG – SOURCE AVAILABILITYSIGNAL &PROGRAMMABLE ENGINE EXERCISER MODULE 2–line display connections for source availability signalcontacts 3 buttons Figure 5–2. Accessory 11BG module (mounted behind operator interface and connected tothe controller) includes source availabilitysignalcontacts and a programmable engine exerciser. Source Availability Signal Contacts ThemoduleprovidesoneFormCcontacteachforthe normalandemergencysourcessignalth
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CONTROL FEATURES (continued) HowtoSetOptionalProgrammableEngineExerciser (part of Acc. 11BG module) Forexample,if theuser wantsthe exerciserto runevery other Saturday at 3 PM, theproper configurationwould be: Hazardous voltage capable of causing shock, burns, or deathis used in this transfer switch. “Alt Sat @ 15:00” Deenergize bothNormal &Emergency power NOTE: When choosing bi–weekly operation, the sources before programming the exerciser. exerciserwillalwaysrunontheweekdesignated“(1)”on thedat
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6 6 2 2 4 4 7 8 7 8 7 8 7 8 5 5 3 3 1 1 CONTROL FEATURES (continued) INPHASE MONITOR LOADDISCONNECT FEATURE FOR MOTOR LOADTRANSFER Connectexternalcircuitstotheterminalsindicatedonthe WiringDiagramprovidedwiththeATS. Inphasemonitoringlogiccontrolstransferandretransfer of motor loads, so that inrush currents do not exceed Thedoublethrow(FormC)contactisratedfor28VDCor normal starting currents. It avoids nuisance tripping of 120VAC(5ampsresistive). Thecontactoperatespriorto circuit breakers and mech
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CONTROL FEATURES (continued) OPTIONALSTRIPHEATER(Accessory44) Accessory 44 Strip Heater is designed to keep ambient thermostat temperatures within the Automatic Transfer Switch enclosureatacceptablelevels. Thisaccessoryconsistsofa mounting bracket with strip heater, thermostat, and dial terminalblock. Atransformerwithfusesisincludedwhen thepowerfortheassemblyisderivedfromvoltagesabove 120Vac. The120Vaccustomerpoweredassemblydoes not include a transformer. This optional accessory is availablefact
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INDEX stripheater, 5–5 A G accessories,5–2,5–5 ground,controller,1–1 P auxiliarycircuits,1–2 parts, 3–1 H problem,3–2 handle,maintenance,1–3 B warning, 1–3 programmableengineexerciser,5–2, battery, 4–2,5–1 5–3 harness, 1–2 buttons,push,3–1 disconnectplugs,3–1 R bypasstimedelay,1–5,2–1,3–1 HELP 800–800–2726(ASCO) ratinglabel, cover customercare@asco.com remotecontrolfeatures, 5–4 C bypasstransfertimedelay,5–4 cable inhibittransfertoemergency, 5–4 I lugs,1–1 remotetest,5–4 preparation,1–1 inphasem
