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Series 386
Operator’s
Non–Automatic Transfer Switches
Manual
E–design 260–400 A, G–design 1000–3000 A
Refertotheoutlineandwiringdrawingsprovidedwith
theASCOSeries386N–ATSforallinstallationdetails.
DANGER is used in this manual to warn of a
hazardous situation which, if not avoided, will
Rating Label
result in death or serious injury.
Eachnon–automatictransferswitchcontainsa rating
labeltodefine the loadsandfault circuit withstand/
closingratings. Referto the labelonthe transferswitch
WARNING is
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SECTION1 INSTALLATION ASCO386Non–AutomaticTransferSwitches(N–ATSs) are factory wiredandtested. Fieldinstallationsimply requiresmountingandconnectionofservicecables, and Be sure that the insulator piece is behind the 260 auxiliary controlcircuits(ifrequired). and 400 ampere transfer switches. insulator Remove the Shipping Skid(large N–ATSs) backing piece ForlargeN–ATSs, openthefrontdoorandremovethe fourlagscrews(2infront, 2inrear)securingenclosure tothewoodskid. SupportingFoundation Thesupporting
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INSTALLATION (continued) LineConnections BusConnections AWiringDiagramisfurnishedwiththeASCO386 Ifbusconnectionisused, useSAEgrade5hardwareto (separatefromthismanual). Refertothisdrawing. All connect bustoappropriateterminalplatesonthe wiringmust be made inaccordance withthe National transferswitch. Wipeoffbussurfacesbeforethey are ElectricalCodeandlocalcodes. joined.Ifbusisverydirty,gentlycleansurfaceswitha non–flammablesolvent. Avoidtouchingcleaned surfaces. De–energize the conductors before m
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INSTALLATION (continued) FunctionalTest TheFunctionalTestconsistsofthreechecks: manual handle operation, voltagechecks, andelectricaloperation. NOTICE Do these checks in the order presented to avoid damaging the non–automatic transfer switch. 1–ManualOperationTest Adetachable maintenancehandleisprovidedonthe transferswitchformaintenancepurposesonly.Manual Figure 1-2. Maintenance handle for E–design 260 and 400 ampere operationoftheswitchshouldbecheckedbeforeitis energized(operatedelectrically).
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INSTALLATION (continued) FunctionalTest (continued) 2–VoltageChecks 3–ElectricalOperation First checknameplateonthetransferswitchforrated Thisprocedure willcheck the electricaloperationof the voltage. Itshouldbethesameasthenormaland Non-AutomaticTransferSwitch. SeeFigure1–4. emergencylinevoltages. Close the transfer switch enclosure door and Use extreme caution when using a meter to tighten the screws before you test electrical measure voltages in the following steps. operation. Do not touch pow
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SECTION2 SEQUENCEOFOPERATION ControllerCode 1 Refer to Section 5, Optional Accessoriesfor additional control functions. RefertoWiringDiagramfurnishedwiththeASCO386. NoteControlFeaturesfurnishedonthisswitch,andreviewoperation. Transfer Transfer Control Control Transfer Transfer Transfer Transfer To To To To Normal Emergency Normal Emergency TransferToEmergency RetransfertoNormal The sequence for loadtransfer tothe emergency The sequence for load retransfer to the normal source begins whenyouturnt
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SECTION3 TESTING&SERVICE PREVENTIVEMAINTENANCE REPLACEMENTPARTS Reasonablecareinpreventivemaintenancewillinsure Replacementpartsareavailableinkitform. When highreliabilityandlonglifefortheswitch. Anannual orderingpartsprovidetheSerialNo., BillofMaterial preventivemaintenanceprogramisrecommended. No.(BOM),andCatalogNo.fromthetransferswitch nameplate. ContactyourlocalASCOPowerTechnolo- ASCO Services, Inc. (ASI) is ASCO Power giessalesofficeorASI. IntheUnitedStatescall Technologies’snationalservice
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TESTING&SERVICE (continued) 1. Opennormalandemergencysourcecircuitbreakers. MANUALLOADTRANSFER Thisprocedurewillmanuallytransfertheloadifthe Controllerisdisconnected. 2. Usemanualhandletomanuallyoperatetransfer switchtotheoppositesource. Removethehandle. See Section 1, Manual Operation. Do not manually operate the transfer switch 3. IfthetransferswitchisintheEmergencyposition until both power sources are disconnected: manuallystarttheenginegeneratorandthenclose open both circuit breakers. the em
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4 4 SECTION4 ADJUSTMENTS SensorAdjustments NOTICE Voltage andfrequency sensorpickupanddropout pointsare factory set asspecifiedonthe Wiring Do not change any other factory settings. Any Diagram. The frequency settingcanbe set for50or60 change in these settings may affect the normal Hz.. Tochange thissetting, followthe procedure operation of the ASCO 386. This change could below. Use Table 4-1forthe settingandcorresponding allow the load circuits to remain connected to a low voltage source. DIPsw
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6 6 7 8 7 8 7 8 7 8 5 5 SECTION5 OPTIONALFEATURES MOTORLOADTRANSFER LOADDISCONNECTFEATURE Inphasemonitoringlogiccontrolstransferand Connectexternalcircuitstotheterminalsindicatedon retransferofmotorloads, sothat inrushcurrentsdo theWiringDiagraminthebackofthismanual. not exceednormalstartingcurrents. It avoidsnuisance Thedoublethrow(FormC)contactisratedfor28 trippingofcircuitbreakersandmechanicaldamageto VDCor120VAC(6ampsresistive). Thecontact motorcouplings. operatespriortoaselectable0, 3, 10,
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INDEX A I O operation auxiliary circuits, 1–1 identificationlabel, cover electrical, 1–4 manual, 1–3 B illustrationof, 1–3 inphase monitor, 5–1 warning, 1–3 barriers, 1–2 sequence of, 2–1 bus connections, 1–2 inspection, 3–1 optionalfeatures, 5–1 load disconnect, 5–1 installation, 1–1 motorload transfer, 5–1 C cable P lugs, 1–1, 1–2 L preparation, 1–1, 1–2 parts, 3–1 catalognumber, inside cover labels, problem, 3–2 cleaning, 3–1 rating, cover connections R line, 1–2 lights, 1–4, 3–1 ratinglabel,
