I.L.15.01.T.K.

Effective June 2000

Instructions for Cutler-Hammer MP1 Series Automatic Transfer Switches 30-1200A

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Table of Contents1. WARRANTY ........................................................................................................................................ 1

2. RECEIVING, HANDLING AND STORAGE ................................................................................... 1

2.1 RECEIVING ...................................................................................................................................... 12.2 HANDLING....................................................................................................................................... 22.3 STORAGE......................................................................................................................................... 2

3. INTRODUCTION ................................................................................................................................ 3

3.1 SAFETY PRECAUTIONS .................................................................................................................... 33.2 GENERAL DESCRIPTION................................................................................................................... 3

3.2.1 Type A..................................................................................................................................... 33.2.2 Type B..................................................................................................................................... 3

3.3 DESCRIPTION OF OPERATION........................................................................................................... 43.4 DEFINITIONS.................................................................................................................................... 4

4. EQUIPMENT DESCRIPTION........................................................................................................... 5

4.1 “F-FRAME” AUTOMATIC TRANSFER SWITCH .................................................................................. 54.2 “K, L, M, N-FRAME” HORIZONTAL AUTOMATIC TRANSFER SWITCH............................................. 54.3 TABLE 1 - SYSTEMS COORDINATION INFORMATION – ...................................................... 6

5. PERFORMANCE SPECIFICATIONS.............................................................................................. 7

6. DESCRIPTION OF OPERATION..................................................................................................... 8

6.1 INPUT PUSHBUTTONS ...................................................................................................................... 86.2 PROGRAM MODE ............................................................................................................................. 8

6.2.1 Password ................................................................................................................................ 86.2.2 Setpoints Menu ....................................................................................................................... 8

6.3 LAMP TEST...................................................................................................................................... 96.4 SERIAL CONNECTION ...................................................................................................................... 96.5 LED OUTPUTS ................................................................................................................................ 96.6 INPUT CONTACT DESCRIPTIONS ...................................................................................................... 96.7 OUTPUT CONTACT DESCRIPTIONS................................................................................................. 10

7. OPERATION VOLTAGE AND MEASUREMENT....................................................................... 10

7.1 MP1 .............................................................................................................................................. 107.2 MP1-E .......................................................................................................................................... 10

8. OPTIONS AND SETPOINTS ........................................................................................................... 11

8.1 MP1 SERIES CONTROLLER OPTIONS ............................................................................................. 118.2 EXTERNAL OPTIONS...................................................................................................................... 13

9. PROGRAM SETPOINTS MENU..................................................................................................... 15

10. SUMMARY OF OPTIONS ........................................................................................................... 16

11. TROUBLESHOOTING................................................................................................................. 17

12. MAINTENANCE ........................................................................................................................... 18

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1. WarrantyThe Seller warrants that the Productmanufactured by it will conform to Seller’sapplicable specifications and be free fromfailure due to defects in workmanship andmaterial for a period of one (1) year from thedate of shipment. In the event that a Productfails to comply with the foregoing warrantySeller will, at its option, either (a) repair orreplace the defective Product, or defectivepart or component thereof, F.O.B. Seller’sfacility freight prepaid, or (b) credit Buyer forthe purchase price of the Product. Allwarranty claims shall be made promptly inwriting. Seller requires all non-conformingProduct be returned at Seller’s expense forevaluation unless specifically statedotherwise in writing by Seller This warrantydoes not cover failure or damage due tostorage, installation, operation ormaintenance not in conformance withSeller's recommendations and industrystandard practice or due to accident,misuse, abuse or negligence. This warrantydoes not cover reimbursement for labour,gaining access, removal, installation,temporary power or any other expenseswhich may be incurred in connection withrepair or replacement. This warranty doesnot apply to Product not manufactured bySeller. Seller limits itself to extending thesame warranty it receives from the supplier.

Limitation of LiabilityThe remedies of the Buyer set forth hereinare exclusive and are the sole remedies forany failure of Seller to comply with itsobligations hereunder. In no event shallSeller be liable in contract, in tort (includingnegligence or strict liability), extra-contractually, or otherwise for damage toproperty or equipment other than theProduct sold hereunder, loss of profits orrevenue, loss of use of Product, cost ofcapital, claims of customers of the Buyer, orany special, indirect, incidental orconsequential damage whatsoever. Thetotal cumulative liability of Seller arising orrelated to this contract whether the claimsare based in contract, in tort (includingnegligence or strict liability), extra-contractually, or otherwise, shall not exceedthe price of the Product or Service on whichsuch liability is based.

2. Receiving, Handling andStorage

2.1 ReceivingEvery effort is made to insure that transferswitch equipment arrives at its destinationundamaged and ready for installation.Crating and packing is designed to protectinternal components as well as theenclosure. Transfer switch enclosures areskid mounted and suited for forkliftmovement. Care should be exercised,however, to protect the equipment fromimpact at all times. Do not remove protectivepackaging until the equipment is ready forinstallation. When transfer switchequipment reaches its destination, thecustomer should inspect the shippingcontainer for any obvious signs of roughhandling and/or external damage incurredduring the transportation phase.Record any external and internal damageobserved for reporting to the transportationcarrier. Call the carriers concerned at oncefor inspection, and request an inspectionreport. Do not write to us first – notify thecarrier instead. If this precaution is nottaken we cannot assist you in recovering theamount of the claim against the carrier. Allclaims should be as specific as possible andinclude shop order (S.O.#) and generalorder numbers (G.O.#).

A shipping label is affixed to the top of theshipping container which includes a varietyof equipment and customer information,such as General Order Number (G.O.#) andCatalog Number (Cat.#). Make certain thatthis information matches other shippingpaper information.Each transfer switch enclosure is boltedthrough its top and bottom mounting holes toa rigid wooden pallet. The pallet is open attwo ends for movement by a fork lift. Heavy-duty cardboard surrounds the enclosure. Acorrugated cardboard protector covers theentire top of the enclosure with additionalcardboard protectors over the indicatinglights. The shipment is secured and furtherprotected with shrink wrap. Do not discardthe packing material until the equipment isready for installation.Once the top packaging is removed from theshipment, the enclosure door can beopened. A paper envelope of documents will

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be found within the enclosure, usuallyattached to the inside of the door. Importantdocuments, such as test reports, wiringdiagrams, and appropriate instructionleaflets, are enclosed within the envelopeand should be filed in a safe place.

2.2 HandlingAs previously mentioned, transfer switchequipment is packaged for forkliftmovement. Protect the equipment fromimpact at all times and do not double stack.Once the equipment is in the installationlocation and ready to be installed, packagingmaterial can be removed. Once theenclosure is unbolted from the woodenpallet, it can be hand moved to itsinstallation position. Two lifting lugs on thetop of the enclosure are provided asstandard on switches from 200-1200 Ampsto facilitate installation.

2.3 StorageAlthough well packaged, this equipment isnot suitable for storage outdoors. Theequipment warranty will not be applicable ifthere is evidence of outdoor storage. If theequipment is to be stored indoors for anyperiod of time, it should be stored with itsprotective packaging material in place.Protect the equipment at all times fromexcessive moisture, construction dirt,corrosive conditions and othercontaminants. It is strongly suggested thatthe package protected equipment be storedin a climate controlled environment of -20° to30°C with a relative humidity of 80% or less.Do not, under any circumstances, stackother equipment on top of a transfer switchequipment enclosure, whether packaged ornot.

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3. IntroductionThis technical document is intended to covermost aspects associated with theinstallation, application, operation andmaintenance of the ATS-MP1 and ATS-MP1-E series controller. It is provided as aguide for authorized and qualified personnelonly in the selection and application of anAutomatic Transfer Switch with the Cutler-Hammer ATS-MP1 series controller. Pleaserefer to the specific WARNING andCAUTION in Section 3.1 before proceeding.If the purchaser requires further informationregarding a particular installation, applicationor maintenance activity, a Cutler-Hammerrepresentative should be contacted.

3.1 Safety PrecautionsAll safety codes, safety standards and/orregulations must be strictly observed in theinstallation, operation and maintenance ofthis device.

WARNINGTHE WARNINGS AND CAUTIONSINCLUDED AS PART OF THEPROCEDURAL STEPS IN THISDOCUMENT ARE FOR PERSONNELSAFETY AND PROTECTION OFEQUIPMENT FROM DAMAGE. ANEXAMPLE OF A TYPICAL WARNINGLABEL HEADING IS SHOWN INREVERSE TYPE TO FAMILIARIZEPERSONNEL WITH THE STYLE OFPRESENTATION. THIS WILL HELP TOINSURE THAT PERSONNEL ARE ALERTTO WARNINGS, WHICH MAY APPEARTHROUGHOUT THE DOCUMENT.

CAUTIONCOMPLETELY READ AND UNDERSTANDTHE MATERIAL PRESENTED IN THISDOCUMENT BEFORE ATTEMPTINGINSTALLATION, OPERATION ORAPPLICATION OF THE EQUIPMENT. INADDITION, ONLY QUALIFIED PERSONSSHOULD BE PERMITTED TO PERFORMANY WORK ASSOCIATED WITH THEEQUIPMENT. ANY WIRINGINSTRUCTIONS PRESENTED IN THISDOCUMENT MUST BE FOLLOWEDPRECISELY. FAILURE TO DO SO COULDCAUSE PERMANENT EQUIPMENTDAMAGE.

3.2 General DescriptionCSA Standard C22.2 No. 178-1978 definesan automatic transfer switch as, “self actingequipment for transferring one or more loadconductor connections from one powersource to another.” The same Standard alsogives definitions for type A and type Bautomatic transfer switches. “Transfer switchtype A means an automatic transfer switchthat does not employ integral overcurrentdevices.” “Transfer switch, type B means anautomatic transfer switch that (does) employintegral overcurrent protection.” Cutler-Hammer automatic transfer switches areavailable in both types.

3.2.1 Type A

Type A are equipped with specialinstantaneous magnetic only interrupters.The trip settings of these special interruptersare set (and fixed) at higher than standardvalues. They are intended to trip only if theupstream protective device fails to clear afault. Incorporating these special magneticonly interrupters, a type A automatic transferswitch operates in exactly the same way asa transfer switch not having this feature. Inthe event that both devices trip, the controlcircuitry will automatically initiate transfer tothe alternate source. The transfer operationwill reset the “tripped” magnetic onlyinterrupter.

3.2.2 Type B

Type B switches are equipped with standardmoulded case circuit breakers with standardthermal-magnetic trip units that will providethe required over-load and short circuitprotection. Type B switches can also be builtusing electronic trip units, which gives theability to include ground fault tripping, aswell as overload (long and short time) andshort circuit protection (instantaneous). Forapplication information or assistance withtype B switches, refer to Cutler-Hammer.

For the remainder of this manual, theswitching devices employed in the switchshall be referred to as breakers. This canimply either magnetic-trip only moulded caseswitches (MCS), or moulded case circuitbreakers (MCCB) with overcurrent trip units.

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3.3 Description of OperationThe Cutler-Hammer Automatic TransferSwitch provides automatic transfer of anelectrical load to a standby power supply inthe event of drop or loss of voltage of any orall phases of the normal power supply. Uponthe restoration of the normal supply, theelectrical load is automatically retransferredto the normal power supply. The mechanismprovides a positive mechanical interlock toprevent both breakers being closed at thesame time. The mechanism is also designedto leave both breakers trip free in the closedposition, permitting incorporation of thermaland short-circuit protection in either or bothbreakers. In Type B switches, an alarmswitch contact is supplied. This contact isconnected to the controller to lock the motorcircuit out of operation when the breaker(s)trip on an overload or short-circuit condition.Then the breaker has to be manually reset.Instructions for the reset procedure arelocated on the front of the operatingmechanism.

3.4 DefinitionsWith respect to their use in this documentand as they relate to automatic transferswitch operation, the following terminology isdefined:

Available – A source is defined as“available” when it is within all undervoltage /overvoltage / underfrequency /overfrequency setpoint ranges for thenominal voltage and frequency setting.

Fails – A source is defined as “failed” whenit is outside of any undervoltage /overvoltage / underfrequency /overfrequency setpoint ranges for thenominal voltage and frequency setting for atime exceeding 0.5 seconds.

Failsafe – Refers to the condition wherebythe transfer switch is connected to theemergency source. In the event that theemergency source fails with normal sourceavailable an immediate retransfer to normalsource shall occur.

Transfer – A “transfer” is defined as theautomatic operation under a normal source

failure of switching the Load from NormalSource to the Emergency Source.

Retransfer – A “retransfer” is defined as theautomatic operation under Normal Sourcereappearance of switching the Load fromEmergency Source to Normal Source.

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4. Equipment Description

4.1 “F-Frame” AutomaticTransfer Switch

Rated 30 amperes through 150 amperes at600 Volts AC and 200A at 240V maximum,50 or 60 Hertz. The mechanism is a leveroperated device controlled by a 120 voltunidirectional motor. The transfer motordrives a cam that in turn operates a steellever by sliding a pin along a slot in the backof the lever. The lever, in turn, operates thetwo breaker handles. There are two microswitches (NS/x, ES/x) inside the breakersthat are operated by the breaker’s maincontacts to provide switch status indicationto the automatic controller. The switch hasthree operating positions. They are: thenormal breaker closed and the emergencybreaker open, the emergency breakerclosed and the normal breaker open or boththe normal and emergency breakers open.The normal and emergency breakers cannever both be closed at the same time.

Figure 1 -Typical Power Panel for 30-200A modelsThe F-Frame switch can also be easilymanually operated. Remove the thumbscrew on the operating handle and place itin a safe location. Then the lever can bemanually operated for whatever positiondesired without interference by theautomatic control. For automatic controlagain, simply align the hole in the motor armwith the slot in the operating arm andreplace the thumb screw. The variousautomatic control components are describedbeginning in Section 6 titled “Description ofOperation”.

4.2 “K, L, M, N-Frame” HorizontalAutomatic Transfer Switch

A complete line rated from 200 through1200* Amperes at 600 Volts AC 50 or 60Hertz.The transfer mechanism consists of thetransfer motor, a gear train and two breakeroperating cams.

Figure 2 - Spur Gear MeshingRelationship (Bottom View of Top Cover)The transfer motor drives the centre gearwhich in turn operates the two secondarygears. There is a projection in the secondarygears which slides in a groove in theoperating cams, moving the cams from sideto side. The breaker handles are set insidetwo outer guides of the cam and are alsomoved from side to side. There are twomicro switches (NS/x, ES/x) inside thebreakers that are operated by the breaker’smain contacts to provide switch statusindication to the automatic controller.

The Horizontal type transfer switch hasthree operating positions, the normalbreaker closed and the emergency breakeropen, the emergency breaker closed andthe normal breaker open or both the normaland the emergency breakers open but neverboth the normal and emergency breakersclosed at the same time. The switch is alsoeasy to operate manually. Simply removethe motor disconnect plug and turn theoperating handle on the front of the transfermechanism in a counter clockwise directionuntil you hear the breakers operated and theindicator is in the desired position. There willbe no interference from the microprocessorcontrol. For automatic control, reconnectthe transfer motor plug and the transferswitch will seek the source with poweravailable. * A 1200A Switch in the Horizontal design is provided as atype “B” switch with overcurrent protection (Option 16N)and rated for 80% continuous current.

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Figure 3 - Typical Power Panel for 200-1200A models

4.3 Table 1 - SYSTEMS COORDINATION INFORMATION –WITHSTAND, CLOSING & INTERRUPTING RATINGS

Ratings when used with upstreambreaker (kA)

Ratings when used with upsteamfuse (kA)ATS

AmpereRating 240V 480V 600V Max Fuse

RatingFuseType 600V

30 100 65 25 200 J,T 20070 100 65 25 200 J,T 200100 100 65 25 200 J,T 200150 100 65 25 400 J,T 200225 100 65 35 400 J,T 200300 100 65 35 400 J,T 200400 100 65 35 600 J,T 200600 65 50 25 800/1200 J,T 100/200800 65 50 25 1200/1600 L 100/2001000 65 50 25 1600 L 2001200 65 50 25 1600 L 200

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5. Performance SpecificationsThe performance specifications for the ATS-MP1 Controller Board are given in Table 2:

Table 2 – Performance SpecificationsInput Control Voltage (50-150)% of V(IN,RMS) 50/60 HzVoltage Measurements of: Normal Source VAB

Normal Source VBCNormal Source VCA

Emergency Source VABEmergency Source VBCEmergency Source VCA

Voltage Measurement Range: 0 to 360 VAC RMS (50/60Hz) – MP10 to 750 VAC RMS (50/60Hz) – MP1-E

Voltage Measurement Accuracy: ± 2% of reading over the monitoring rangeFrequency Measurements of: Normal Source (S1), Emergency Source (S2)Frequency Measurement Range: 40 Hz to 70 HzFrequency Measurement Accuracy ± 0.3 Hz over the measurement rangeUndervoltage Dropout Range: 50% to 97% of the nominal system voltageUndervoltage Pickup Range: (Dropout +2%) to 99% of the nominal system voltageOvervoltage Dropout Range: 105% to 120% of the nominal system voltageOvervoltage Pickup Range: 103% to (Dropout –2%) of the nominal system voltageUnderfrequency Dropout Range: 90% to 97% of the nominal system frequencyUnderfrequency Pickup Range: (Dropout + 1Hz) to 99% of the nominal system frequencyOverfrequency Dropout Range: 103% to 110% of the nominal system frequencyOverfrequency Pickup Range: 101% to (Dropout – 1Hz) of the nominal system frequencyOperating Temperature Range -20°C to + 70°CStorage Temperature Range -35°C to + 85°COperating Humidity 0 to 95% relative humidity (non-condensing)Generator Start Relay 5A, 1/6 HP @ 250VAC

5A @ 30VDC with a 30W maximum loadAlarm Relay 10A, 1-3 HP @ 250VAC

10A @ 30VDC

Table 3 - Applicable Test StandardsUL 991Canadian Standards Association Conformance (CSA)UL 1008 / CSA 22.2 No 178.22Dielectric testFCC Part 15Conducted/Radiated Emissions (Class A)CISPR 11Conducted/Radiated Emissions (Class A)IEC 1000-2Electrostatic Discharge testIEC 1000-3Radiated Susceptibility testsIEC 1000-4Fast Transient testsIEC 1000-5Surge Withstand tests

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6. Description of OperationThe primary functions of the ATS-MP1controller is to accurately monitor two powersources and provide the necessaryintelligence to operate a transfer switch in anappropriate and timely manner. The ATS-MP1 uses proven microprocessor-basedtechnology that provides a high reliabilityand accuracy for all voltage sensing andtiming functions. The input function consistsof keypad type pushbutton inputs (4 in total).In addition, effectively a fifth user inputexists via a rear located PC type serial portconnection to be used in factory and fieldprogramming of options and setpoints.Outputs functions consist of LED outputs (4total) and a two line 16-characteralphanumeric LCD display output.

6.1 Input PushbuttonsThere are four front panel membrane typepushbuttons. Pushbuttons accomplish theirfunction when pressed and released.

Menu SelectThe user can scroll through the availabledisplay information. Pushing the MenuSelect key will scroll through the voltage andfrequency of each source. When in thesetpoints menu, pushing the Menu Selectkey will scroll the user through each of thesetpoint options in sequence.

Increase (Increments specific variablerange)When the user initiates program mode, eachpress of the Increase key will increase thedisplayed value by one. The Increasepushbutton will continue to scroll if it ispressed and not released.

Decrease (Decrements specific variablerange)When the user initiates program mode, eachpress of the Decrease key will decrease thedisplayed value by one. The Decreasepushbutton will continue to scroll if it ispressed and not released.

Save/ExitWhen in program mode and the user hasselected the desired setpoints for nominal

operation, pressing the save button will storeall of the settings.

The following are three modes of operationthat are easily accessed via the front panelkeys:

6.2 Program ModeThis mode of operation is used only tochange setpoint values of existing operatingparameters (standard and programmedoptions).

Program mode is achieved by depressingthe Menu Select key and Save (Exit) keysimultaneously for five-second duration.

The LCD will then display the phrase “EnterPassword.”

6.2.1 PasswordTo enter the program mode, the ATS-MP1requires a password to prevent unauthorizedpersons from modifying setpoint values.The password is factory set to a combinationof 4 depressions of the Menu Select, up,and down arrow keys in sequence. Thepassword set at the factory is contained on asticker mounted on the rear of the controller.

Once the correct password is entered, thepassword may be changed by the user atthe prompt “Change Password?” It isadvisable that if changed, the password beset to either a combination that is easilyremembered, and also written in theappropriate space on the sticker. Theenclosure door can be padlocked to preventunauthorized persons from gainingknowledge of the password.

6.2.2 Setpoints MenuWhen in the setpoints menu, by depressingthe Menu Select key, the user can scrollthrough the operating parameters at anytime adjusting any setpoint values using the

ENTER PASSWORD

Factory Password:Decrease, Increase, Menu, Decrease

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Increase or Decrease keys. Once all of thesetpoint operating parameters have beenentered, the user may save the new setpointoptions by depressing the Save (Exit) key.Once this is completed, the controlleracknowledges the setpoint values havebeen programmed by displaying themessage “Setpoints Programmed.”

6.3 Lamp Test(Increase and Decrease Simultaneously)Pressing the Increase and Decrease buttonssimultaneously will cause the all LEDS toilluminate for a minimum of ten seconds.During this lamp test the LCD displays themessage “Lamp Test.”

6.4 Serial ConnectionA serial input connection is accessible fromthe rear of the ATS-MP1 controller. Thisinput is used for factory and fieldprogrammability of options and setpoints. Itcommunicates to a standard PC or laptopvia serial communication. A field updatesoftware package for Windows based PCsis available. This software allows the user toadjust and view controller setpoints, and addadditional options to the controller with afactory authorized code. Contact Cutler-Hammer for further details.

6.5 LED OutputsNormal Source AvailableThis red LED is lit when the normal sourcemeets the user programmed setpointcriteria.

Normal Source ConnectedThis red LED displays the status of thetransfer switch position. It illuminates whenthe normal source is available and thetransfer switch is in normal position.Indication of the transfer switch in normalposition is accomplished by sensing theclosed A-contact of the normal breakerauxiliary.

Emergency Source AvailableThis red LED is lit when the emergencysource meets the user programmed setpointcriteria.

Emergency Source ConnectedThis red LED displays the status of thetransfer switch position. It illuminates when

the emergency source is available and thetransfer switch is in emergency position.Indication of the transfer switch inemergency position is accomplished bysensing the closed A-contact of theemergency breaker auxiliary.

6.6 Input Contact DescriptionsThe control outputs of the ATS-MP1controller are wetted DC contacts.

Source 1 Auxiliary ClosedThis contact is hard-wired to the normalbreaker auxiliary contact that is closed whenthe normal breaker is closed (A-contact).

Source 2 Auxiliary ClosedThis contact is hard-wired to the emergencybreaker auxiliary contact that is closed whenthe emergency breaker is closed (A-contact).

Source 1 and Source 2 Lockout(Requires Option 16)This contact is hard-wired to the normaland/or emergency breaker lockout (bellalarms) contacts that close when one of thebreaker has tripped due to an overcurrentcondition or fault current condition. Closureof this contact inhibits any transfer fromoccurring and the message“*** LOCKOUT ***” will appear on the LCD.

Bypass Time Delay(s)(Requires Option 8)Closure of this contact will bypass theprogrammed values for either or both of theTDNE and TDEN timer setpoints, dependingupon which option has been selected

Go To Neutral (Services Disconnect)Closure of this contact forces the controllerto switch to the neutral position therebydisconnecting the load from both sources.Enabling of this function forces a minimumneutral position time as determined by theprogrammed TDN setpoint.

Test/Area ProtectionClosure of this contact will cause thecontroller to initiate a transfer to Source 2 ifthe transfer switch is in Source 1 position.Opening of this contact will cause thecontroller to initiate a transfer to Source 1 ifthe transfer switch is in Source 2 position.

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Preferred Source – MP1-E OnlyRequires Option 10This feature permits the selection of eithersource (1 or 2) as the preferred or normalsource. The normal source is the source thatthe switch always looks to for availability sothat it can transfer to it.

Manual Return To Normal – MP1-E OnlyRequires Option 29A manual operated momentary contact(normally open) operates in conjunction withthe Manual Return to Normal option toreplace the TDEN timing function. With themanual mode set, closure of this contact willprompt an immediate transfer bypassing theTDEN time delay. This ensures that a re-transfer occurs only at the discretion of theoperator.

6.7 Output Contact DescriptionsThe control outputs of the ATS-MP1controller are dry relay contacts. Theserelays are comprised of a latching Form Arelay to provide the Generator Start Relaycontact, a Form A contact for the TransferMotor Relay contact, and a Form C relay foran alarm output. The dielectric rating foreach output is a minimum of 1500 VAC

Generator Start RelayThis latching relay is the generator startrelay for system configurations that employa generator on the emergency source. Thisrelay employs a Form A contact for closureof the generator start circuit. The Generatorstart relay is rated for 5A @ 30VDC with a30W maximum load.

Transfer Motor RelayThis is a Form A contact is used to close theelectrical path of the transfer motor controlcircuit. Closure of this contact will initiate atransfer from the normal source toemergency source and from emergencysource to normal source as required pernormal transfer switch operation.

Alarm RelayThe full Form C contact of this relay may bewired to an alarm enunciator panel toindicate problem with the ATS. This relay isnormally energized to indicate an absenceof an alarm state. De-energization of this

relay indicates the presence of an alarmcondition. An alarm condition will occur if atransfer has been initiated but is nevercompleted (This may indicate thatsomething is wrong with the motor ortransfer mechanism). The alarm contactwill also change state if the controllerdetects a phase reversal condition betweenthe normal and emergency sources. Thecontroller will also inhibit transfer on thiscondition

Pre-Transfer Relay (MP1-E Only)Requires Option 35This feature provides for the control of anexternal 120V instant relay with 2 Form Ccontacts to remotely signal that a re-transferis about to take place.

7. Operation Voltage andMeasurement

Both the MP1 and MP1-E operate on singleand three phase systems with selectablefrequency settings of 50Hz or 60Hz.

7.1 MP1This MP1 operates directly from the linesensing inputs of the two different sources(normal and emergency). The nominaloperating system inputs are from 110VAC-240VAC. The standard system assumesthat neutral is available and that the transfermotor can therefore be powered from anavailable 120 VAC source. If a neutralconductor is not available, a 120VAC supplyis created by an external transformer.

7.2 MP1-EThe MP1-E provides the user with anenhanced feature set, and a wider range ofvoltage measurement, from 110VAC-600VAC. A high impedance resistive circuitis used in series with the voltage sensinginputs to reduce the voltage applied to thecontroller to comply with safety codes fordoor-mounted devices. The power supplyfor the MP1-E requires a 120VAC source,provided by an external transformer.

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8. Options and SetpointsThe options and setpoints are stored in non-volatile memory. A standard option isenabled on every controller. Thosedesignated as programmable can be addedat the factory at the customer’s request(usually at an additional cost), or can beadded in the field via PC software and/or anoption key. Setpoint values are modified byusing the pushbutton keys on the front panelor using the Cutler-Hammer ATS-ConnectField Update software.

NOTICE

REFER TO BOTH THE FACTORY TESTSHEET, AND THE DRAWINGS THATSHIPPED WITH THE TRANSFER SWITCHTO DETERMINE THE OPTIONS THATARE INSTALLED. AN OPTION WILL NOTBE FUNCTIONAL, NOR WILL THEPARAMETERS BE ADJUSTABLETHROUGH THE SETPOINTS MENU IF ANOPTION IS NOT ENABLED.

8.1 MP1 Series ControllerOptions

Standard option - TDNETime Delay Normal to Emergency

Provides a time delay when transferring thenormal source to the emergency source. Toensure stability of the emergency source.Timing begins when the emergency sourcebecomes available.

Standard option - TDESTime Delay Engine Start

Delays the initiation of the engine startcircuit in order to override momentary poweroutages or voltage fluctuations of the normalsource. The TDES timer shall start whenthe normal source becomes unavailable. Ifthe normal source becomes available whiletiming, the TDES timer shall reset. Thecontroller can perform the time delay enginestart function without control power for 120seconds.

Standard option - TDENTime Delay Emergency to Normal

Delays the transfer from the emergencysource to the normal source to permitstabilization of the normal source before re-transfer is made. Timing begins when thenormal source becomes available.

If the emergency source fails during timingfor a period greater than 0.5 seconds,transfer to normal source is immediate. Ifthe normal source fails during timing, theTDEN timer shall reset once the normalsource becomes available again.

Standard option - TDECTime Delay Engine Cooldown

Permits the generator to continue to rununloaded after retransfer to the normalsource has occurred. Timing begins whenthe transfer to normal has been completed.

Emergency Source Frequency/VoltageSensingContinuously monitors the emergencysource for one of the conditions listed below.When the emergency frequency and/orvoltage is outside the dropout setpoints, thesource will become unavailable. Thesource’s frequency and/or voltage will thenhave to be within the pickup setpoints tobecome available again.

a) Emergency Source Undervoltage(Standard option)

b) Emergency Source Underfrequency(Standard option)

c) Emergency Source Overvoltage(Optional Feature)

d) Emergency Source Overfrequency(Optional Feature)

Normal Source Frequency/VoltageSensingContinuously monitors the normal source forout of range setpoint values. When thenormal frequency and/or voltage is outsidethe dropout setpoints, the source willbecome unavailable. This will then prompt atransfer to the emergency source once itbecomes available. The normal source’sfrequency and/or voltage will then have tobe within the pickup setpoints to becomeavailable again for a retransfer.

a) Normal Source Undervoltage (Standardoption)

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b) Normal Source Underfrequency(Optional Feature)

c) Normal Source Overvoltage (OptionalFeature)

d) Normal Source Overfrequency(Optional Feature)

Standard Option – Phase ReversalMP1-E OnlyThe alarm contact will change state if thecontroller detects a phase reversal conditionbetween the normal and emergencysources. The controller will also inhibittransfer on this condition.

Standard Option - Plant ExerciserThis option provides for automatic testoperation of the generator. The interval isfixed at once per week with duration equal tothe programmed engine test time (ERT).Two optional modes of plant exercising areavailable:

a) No Load Exerciseb) Load Exercising with failsafe

If desired, this option can be disabled bychoosing “No” at the “Plant Exerciser”prompt in the menu. Also if “---“ is chosenas the test day, the engine will not beexercised.

Optional Feature 8 - Pushbutton Bypassof Time Delays (PBNE/PBEN)

Enables the user to bypass TDNE or TDENtimer during a test or exercise. Pressing theexternal pushbutton shall cause the transferswitch to transfer to the normal and/oremergency source without a time delay.Three optional modes of bypassing areavailable:

a) PBNE – Pushbutton Bypass Time DelayNormal to Emergency

b) PBEN – Pushbutton Bypass Time DelayEmergency to Normal

c) PBG – Pushbutton Bypass Time DelayGlobal (Both TDNE & TDEN)

Optional Feature 10 - Preferred Source(PFR SRC) MP1-E OnlyPermits the selection of either source (1 or2) as the preferred source. The preferredsource is the source that the MP1-E

controller looks to for availability so that thetransfer switch may remain in this positionand supply the load with this source.The preferred source will be considered thesame as the “normal” source and thealternate source will be considered the sameas the “emergency” source. All time delays(e.g. TDNE, TDEN) will be a function of thisfeature and follow the preferred source.Three optional modes of Preferred SourceSelection are programmable:PS1 – Source 1 is selected as preferred.Source 2 is the alternate source.PS2 – Source 2 is selected as preferred.Source 1 is the alternate source.PS0 – No Source is selected as preferred

Note: If the preferred source feature is notprogrammed, Source 1 will default as thepreferred source and Source 2 will defaultas the alternate source.If no sources are selected as preferred, thetransfer switch will remain on any sourcethat is available and meets the programmedset-point criteria. Moreover, in this mode ofoperation, the transfer switch will onlytransfer from Source 1 to Source 2 or fromSource 2 to Source 1 if a failure occurs onthe source that the transfer switch resideson. It should be noted that the preferredsource contact is disabled when there is nopreferred source selected. However, if theArea protection option is enabled andprompted, the controller will react bytransferring to the appropriate source asdescribed in the Area Protection feature.

Optional Feature 26D - Test/AreaProtectionThis feature provides for a remote customercontact. This option is always enabled in thecontroller, but as an option, terminal blockconnections may be provided for a remotesignal.Closure of this contact will cause thecontroller to initiate a transfer to Source 2 ifthe transfer switch is in Source 1 position.Opening of this contact will cause thecontroller to initiate a transfer to Source 1 ifthe transfer switch on Source 2 position.This feature is typically used if it is knownthat there may be problems with the NormalSource such as an impending lightningstorm, or the local utility performingmaintenance in the area. The switch will

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remain on the emergency source until theexternal contact is opened, when user iscertain that the threat of problems haspassed. If the emergency source fails atany time when in the Area Protection mode,the switch will immediately transfer back tothe Normal source if it is Available.

The MP1-E controller allows the Test/Areaprotection input to be disabled if the userwould like to prevent unauthorized usersfrom using the test switch or input contact.

Optional Feature 29 - Manual Return ToNormal – MP1-E OnlyA manual operated momentary contact(normally open) operates in conjunction withthe Manual Return to Normal option toreplace the TDEN timing function. With themanual mode set, closure of this contact willprompt an immediate transfer bypassing theTDEN time delay. This ensures that a re-transfer occurs only at the discretion of theoperator.

Optional Feature 32 - Time Delay NeutralProvides a time delay in the transfer switchneutral position when the load is transferredin one or both directions. This is to preventexcessive inrush currents due to out-of-phase switching of large inductive loads. Ifthe TDN timer is programmed to 0 seconds,the transfer switch shall operate as if theTDN option is disabled. Three optionalmodes of Neutral Time Delay are availableas programmable:

(a) TDN(NE) – Time Delay Neutral (fromNormal to Emergency)

(b) TDN(EN) – Time Delay Neutral (fromEmergency to Normal)

(c) TDN(G) – Time Delay Neutral (Bothdirections)

8.2 External OptionsThere are also external options that may beinstalled in a Cutler-Hammer AutomaticTransfer Switch. A brief description isprovided.

Standard Feature 6D – 2 Position TestSelector Switch (TSS)Position 1 – “Auto”: The ATS will functionnormally, transferring to the emergencysource when normal power is lost.

Position 2 – “Test”: The ATS will simulatethe loss of the normal source. The switchwill transfer to source 2 after the Time DelayEngine Start, and the TDNE has expired.The ATS will return to the normal positionwhen the switch is return to “Auto”.

Option 6G is identical to the Test SelectorSwitch except key operated. Key removablein “Auto” position.

Standard Feature 6H – 4 Position TestSelector Switch (FPSS)Position 1 – “Auto”: The ATS will functionnormally, transferring to source 2 whennormal power is lost.

Position 2 – “Test”: The ATS will simulatethe loss of the normal source. The switchwill transfer to source 2 after the Time DelayEngine Start, and the TDNE has expired.The ATS will return to the normal positionwhen the switch is returned to “Auto”.

Position 3 – “Engine Start”: The engine startcontacts will close, giving the genset a startsignal. This position can be used to test thecorrect connection of the engine startterminals, or as a remote start. Thecontroller with function normally and transferto the emergency if normal power is lost.

Position 4 – “Manual”: This will disconnectthe transfer motor, and prevent transfers ineither direction. The ATS can be transferredonly by operating the manual transferhandle.

Option 6J is identical to the Four PositionSelector Switch except key operated. Keyremovable in “Auto” position.

Optional Feature 12C – NormalConnected Pilot light.A green 30mm indication light indicates thatthe load is connected to the normal source.

Optional Feature 12D –Emergency Connected Pilot light.A red 30mm indication light indicates thatthe load is connected to the emergencysource.

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Optional Feature 12G –Normal Available Pilot light.A white 30mm indication light indicates thatthe normal source is available.

Optional Feature 12H –Emergency Available Pilot light.A white 30mm indication light indicates thatthe emergency source is available.

Optional Feature 14 – Auxiliary Relays120VAC instant relays labeled NRA (NormalSource) and ERA (Emergency Source)provide the user with up to six (6) form Ccontacts for switch status indication. Therelays are energized when power isavailable and the switch is currentlyconnected to the source. The contacts arewired to terminal blocks beginning withnumber 501. See the schematic shippedwith the unit for more detail.

Optional Feature 15 – Auxiliary ContactsAuxiliary switches mounted inside thebreakers follow the breaker position,regardless of power availability. The form Ccontacts are wired to terminal blocksbeginning with number 401. See theschematic shipped with the unit for moredetail.

Optional Feature 16 - IntegralOvercurrent ProtectionProvides ovecurrent protection integral tothe power switching device. The use of thisoption can, in many cases, eliminate theneed for separate upstream,overcurrent/short-circuit protection. Forsafety purposes, this option includes a lock-out function that prevents further automatictransfer operation until the appropriatesource is manually reset. The MP1controller will also read ***LOCKOUT*** onthe display. See the front of the switchmechanism for instructions. (Note: Fourpole transfer switches include overcurrentprotection only on the three power poles)

Optional Feature 18 – Metering andCommunicationsAnalog meters or Cutler-Hammer IQmetering devices can be installed to providevarious metering functions. Refer to theappropriate instruction manuals that ship

with the transfer switch for additionalinformation.

Optional Feature 24 – Battery ChargerA 5A trickle charger with DC output of 12Vor 24V is mounted either inside the switchenclosure or supplied loose and externallymounted. Refer to the specific instructionmanuals that ship with the transfer switch foradditional information.

Optional Feature 30 – Cranking LimiterAn externally mounted timing relay,adjustable from 0-120 sec. The relay willinterrupt the engine start circuit if voltagedoes not appear on the emergency sourcewithin the pre-selected time. When settingthe time delay, make certain the TDES andthe warm-up time of the genset is taken intoaccount.

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9. Program Setpoints MenuThis table is a guide to the program setpoints menu. An explanation is given for each prompt thatwill appear as the Menu Select key is pressed.ProgramSetpoint Display

SetpointPossibilities

DisplayExplanation

Lang: English, French Language the controller displays messagesCurrent Day: Mon-Sun Current Day – requires to only be set onceCurrent Hour: 0-23 Current HourCurrent Min: 0-60 Current MinNom.Volt: 110 VAC – 240 VAC

110VAC – 600VACSystem operating voltage

Nom .Freq: 50Hz or 60Hz. System operating frequencyPhases: 1 or 3 Single phase or Three Phase systemTDNE: 0 sec. to 1800 sec. Time Delay Normal to EmergencyTDES: 0 sec. to 120 sec. Time Delay Engine StartTDEN: 0 sec. to 1800 sec. Time Delay Emergency to NormalTDEC: 0 sec. to 1800 sec. Time Delay Engine CooldownTDN: -none-, N to E, E to N,

globalTime Delay in Neutral position. Can beselected when transferring in one direction onlyor both

TDN: 0 to 120 sec. Time Delay NeutralTPRE: 0 to 255 sec Pre-Transfer Time DelayN-UV-DO: 50% to 99% of nominal Source 1 Undervoltage Dropout (% of nominal)N-UV-PU: (dropout +2%) to 99% Source 1 Undervoltage Pickup (% of nominal)E-UV-DO: 50% to 99% Source 2 Undervoltage Dropout (% of nominal)E-UV-PU: (dropout +2%) to 99% Source 2 Undervoltage Pickup (% of nominal)N-OV-DO: 105% to 120% Source 1 Overvoltage Dropout (% of nominal)N-OV-PU: (dropout -2%) to 120% Source 1 Overvoltage Pickup (% of nominal)E-OV-DO: 105% to 120% Source 2 Overvoltage Dropout (% of nominal)E-OV-PU: (dropout -2%) to 120% Source 2 Overvoltage Pickup (% of nominal)N-UF-DO: 90% to 99% of nominal Source 1 Underfrequency Dropout (Hz)N-UF-PU: (dropout +1Hz) – 99% Source 1 Underfrequency Pickup (Hz)E-UF-DO: 90% to 99% of nominal Source 2 Underfrequency Dropout (Hz)E-UF-PU: (dropout +1Hz) – 99% Source 2 Underfrequency Pickup (Hz)N-OF-DO: 103% to 110% Source 1 Overfrequency Dropout (Hz)N-OF-PU: (dropout –1Hz) – 110% Source 1 Overfrequency Pickup (Hz)E-OF-DO: 103% to 110% Source 2 Overfrequency Dropout (Hz)E-OF-PU: (dropout –1Hz) – 110% Source 2 Overfrequency Pickup (Hz)Pref.Src: enable or disable Preferred source enable or disableP.S. Select S1, S2 or none Preferred source select. Source 1(Normal),

Source 2(Emergency) or None (sourcecurrently connected)

Man. Retransf. Y or N Pushbutton input for manual return to normalTest/Area Prot Y or N Test/Area protection enable or disablePlant Exerciser: Y or N Plant Exerciser enabled or disabledPE Load Transf: Y or N Plant Exerciser Engine test with or without loadEngine Run: 0 – 600min. Engine run time on exerciseTest Day: --- ,or Mon-Sun Plant Exerciser Day of the weekTest Hour: 0-23 Plant Exerciser HourTest Min: 0-60 Plant Exerciser Test MinuteNote: Highlighted options are exclusive to the MP1-E Controller

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10. Summary of OptionsOption

#Features Standard/Optional

1 TDNE - Time delay Normal to Emergency Standard2 TDES - Time delay Engine Start Standard3 TDEN - Time delay Emergency to Normal Standard4 TDEC - Time delay Engine Cool-down Standard

5B 1Φ Undervoltage/Underfrequency Standard5C 1Φ Overvoltage/Overfrequency Optional - Programmed5D 1Φ Undervoltage Optional - Programmed5E 1Φ Overvoltage Optional - Programmed5F 3Φ Undervoltage Optional - Programmed5G 3Φ Overvoltage Optional - Programmed5J 3Φ Undervoltage/Underfrequency Optional – Programmed5K 3Φ Overvoltage/Overfrequency Optional – Programmed6D Maintained 2-Position Test Selector (Auto/Test) Standard - External Contact6H Maintained 4 –Position Test Selector (Auto/Test/Man./Eng.

Start)Optional - External Contact

8C Bypass Time Delay Normal to Emergency Optional - External Contact8D Bypass Time Delay Emergency to Normal Optional - External Contact8M Bypass Time Delay Global (Both Directions) Optional - External Contact10 Preferred Source (MP1-E Only) Optional – External Contact

12C Normal Position Standard (On faceplate)12D Emergency Position Standard (On faceplate)12G Normal Source Available Standard (On faceplate)12H Emergency Source Available Standard (On faceplate)16B Normal Side and Emergency Side Optional - External Contact16E Emergency Side Only Optional - External Contact16N Normal Side Only Optional - External Contact23C No Load Exercise Standard23D Load Exercise with Failsafe Standard26A 3Φ Undervoltage Standard26B 1Φ Undervoltage Optional – Programmed26C 3Φ Overvoltage Optional – Programmed26D 1Φ Overvoltage Optional – Programmed26E 1Φ Underfrequency Optional – Programmed26D Area Protection Optional – External Contact26F 1Φ Overfrequency Monitor Optional – Programmed26H 1Φ Undervoltage / Underfrequency Optional – Programmed29J Manual Return to Normal (MP1-E Only) Optional – External Contact32A Time Delay Neutral Global (Both Directions) Optional – Programmed32B Time Delay Neutral – (Only on Transfer) Optional – Programmed32C Time Delay Neutral – (Only on Retransfer) Optional – Programmed35A Pretransfer (From Norm. to Emerg. Only) (MP1-E Only) Optional - Programmed35B Pretransfer (From Emergency to Normal) (MP1-E Only) Optional - Programmed35C Pretransfer (Global – Both Directions) (MP1-E Only) Optional - Programmed

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11. Troubleshooting

WARNING

HAZARDOUS VOLTAGES IN ANDAROUND TRANSFER SWITCHEQUIPMENT DURING THE PROBLEMSOLVING PROCESS CAN CAUSEPERSONAL INJURY AND/OR DEATH.AVOID CONTACT WITH ANY VOLTAGESOURCE WHILE PROBLEM SOLVING.

ONLY PROPERLY TRAINED PERSONNELFAMILIAR WITH THE TRANSFERSWITCH EQUIPMENT AND ITSASSOCIATED EQUIPMENT SHOULD BEPERMITTED TO PERFORM THEPROBLEM SOLVING FUNCTION. IF ANINDIVIDUAL DOES NOT FEEL QUALIFIEDTO PERFORM THE PROBLEM SOLVINGFUNCTION, THE INDIVIDUAL SHOULDNOT ATTEMPT TO PERFORM ANY OFTHESE PROCEDURES.

A basic problem solving effort is the firststep to take prior to calling for assistance.Frequently, the effort will successfullyaddress most problems encountered. Theproblem solving procedure is presented inthe following paragraphs as observedProblem Symptoms and one or morepossible Solution Steps. All of the stepspresented may not apply to all transferswitches, depending upon the logiccontroller. If a problem persists after havingcompleted the problem solving procedure,contact a Cutler-Hammer representative forfurther assistance. When calling forassistance, the following is the minimuminformation required to properly address theneed:

1. Shop Order Number (SO#) or GeneralOrder Number (GO#) of transfer switch.2. Catalog and/or Style Number of transferswitch3. Actual location of transfer switch (type offacility, address, etc.)4. Company name5. Name and position of individualrepresenting company6. Basic description of situation as it exists7. Any results of problem solving stepstaken and/or readings taken of the system

voltage that now appears on the loadterminals.

A. Gen-Set Does Not Start When TestSwitch is Operated and Held in “Test”Position.1. Check Operation. Make sure the Test

Selector Switch is held in “test” positionlonger than the TDES time delay.

2. Check Engine Controls. Make surecontrol is in “Automatic” position. Makesure batteries are charged andconnected. Make sure engine startcircuit is wired.

3. Check Wiring. Make sure the startsignal wires from the engine controlsare connected to the correct terminalson the Control Panel. See theSchematic/Wiring Diagram.

4. Check Signal Circuit. Disconnect andtape start signal wires. Connect theohmmeter between the control panelterminals 51 and 52. The readingshould indicate an open circuit. Turnthe Test Selector Switch to “Test”position. After TDES time delay, theohmmeter should indicate a closedcircuit.

B. Transfer Switch Does Not Retransferthe Load after Normal Source Returns orafter Test Switch is returned to “Auto’position.1. Check Operation. Make sure time has

passed to allow for TDEN time delay.2. Check Normal Source Voltage Levels.

On a three phase system, voltmetershould read phase to phase voltage.

3. Check Signal Circuit. Confirm that theTest Switch has reopened. Make surethe controller display does not read“Area Protection”. An ohmmeter shouldindicate an open circuit betweenterminals P10-6 & P10-7 on thecontroller.

4. Confirm “Manual Return to Normal”is not enabled (MP1-E Only). If themanual return to normal option isenabled, the controller will wait for aclosed contact (a pushbutton) on inputsP10-6 & P10-9. Check that thepushbutton is connected properly, andwhen the pushbutton is pressed, thecontacts are closing.

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C. With Generator Running, Switch DoesNot Transfer the Load to Emergency.1. Check Operation. Make sure time has

passed to allow for TDNE time delay.2. Check Engine Controls. Check

generator output frequency andvoltage. Output should be at least 90%of nominal voltage and 95% of nominalfrequency. Make sure generator outputcircuit breaker is closed.

3. Check Wiring. Voltmeter should readphase to phase voltage betweenTransfer Switch EA and EB.

D. Switch Retransfers the Load, butGenerator Continues to Run.1. Check Operation. Make sure time has

passed to allow for TDEC time delay.2. Check Engine Controls. Make sure

engine starting control is in the“Automatic” position.

3. Check Signal Circuit. Disconnect andtape start signal wires which areconnected to the control panelterminals 51 and 52. Connectohmmeter between these terminals;reading should indicate an open circuit.

12. Maintenance

WARNING

HIGH VOLTAGES ARE PRESENT IN ANDAROUND TRANSFER SWITCHEQUIPMENT. BEFORE INSPECTING ORMAINTAINING THIS EQUIPMENT,DISCONNECT LINE POWER FROM THEEQUIPMENT BEING SERVICED BYOPENING AND LOCKING OUT, IFPOSSIBLE, THE NEXT HIGHESTDISCONNECT DEVICE. FAILURE TOFOLLOW THIS PROCEDURE COULDCAUSE PERSONAL INJURY AND/ORDEATH.

In general, transfer switch equipment isdesigned to be relatively maintenance freeunder normal usage. However, because ofthe variability of application conditions andthe importance placed on dependableoperation by this type of equipment,inspection and maintenance checks shouldbe made on a regularly scheduled basis.Since equipment maintenance will consist

mainly of keeping the equipment clean, thefrequency of maintenance will depend, to alarge extent, on the cleanliness of thesurroundings. If a significant amount of dustor foreign matter is present, a more frequentmaintenance schedule should be followed.It is suggested that visual inspections of theequipment be made on a regular basis, notjust during regularly scheduled periods.Always be alert for an accumulation of dirt inand around the structure, loose parts and/orhardware, cracks and/or discoloration toinsulation, and damaged or discoloredcomponents.

WARNING

DO NOT perform dielectric tests on theequipment with the control componentsin the circuit.DO NOT use loctite.

1. Check lubricant in high speed bearingsof the motor and the low speed bearingsof the gear box. For lubrication use DowCorning Silicon DC44 or equivalent onthe high speed bearings and Aero ShellNo. 6 grease or equivalent in gear boxafter 5000 operations.

2. Check if control components and plugsare tight in sockets.

3. Periodically inspect all terminals (load,line and control) for tightness. Re-tightenall bolts, nuts and accessible hardware.Clean or replace any contact surfacesthat are dirty, corroded or pitted.

4. Automatic Transfer Switches should bein clean, dry and moderately warmlocations. If signs of moisture arepresent, dry and clean transfer switch. Ifthere is corrosion try to clean it off. Ifcleaning is unsuitable, replace thecorroded parts. Should dust and/ordebris gather on the transfer switch,brush, vacuum or wipe clean.

WARNING

DO NOT blow dirt into the breaker orterminals.

5. Test the transfer switch operation. Whilethe transfer switch is operating, checkfor freedom of movement, hidden dirt or

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corrosion and any excessive wear onthe mechanical operating parts. Clean,lubricate or re-place parts wherenecessary.

6. Check all adjustable control components(time delay and voltage sensing relays)for correct settings.

7. If the horizontal mechanism is removedbe sure that the scribe lines on thegears are in line. When re-assemblingthe drive mechanisms, be sure that theyare fastened to the correct holes in theframe and that the breaker handles arebetween the cam fingers. (One breakerhas to be on and the other off.)

EATON

Cutler-Hammer403 East Lake Blvd., Airdrie, Alberta, T4A 2G1Canadatel: 403-948-7955fax: 403-948-6967www.chfire.com

© 2003 Eaton CorporationAll Rights ReservedPrinted in CanadaPublication No.: I.L.15.01.T.KJune 2000