Cutler Hammer Spec Sheet

7/30/2019 Cutler Hammer Spec Sheet

1/30

January 1999

Cutler-HammerK

CAT.71.01.T.E

Transfer Switches

Cutler-Hammer Automatic Transfer Switchesare reliable, rugged, versatile and compactassemblies for transferring essential loads andelectrical distribution systems fromone power source to another.

Transfer switches can be supplied in separateenclosures for stand-alone applications orcan be supplied as an integral component inthe following equipment:

Product Type SectionRef.

Magnum DS SwitchgearDSII

Switchgear

Pow-R-Line SwitchboardsMotor Control Centers

E1E2

E3I2

Types of Transfer Switches Available:

Automatic Solid-State Logic

ATHSFD 100-150 amperes 2, 3 or 4 polesATVS 225-1000 amperes 2, 3, or 4 poles

Automatic Microprocessor (IQ Transfer)Logic

ATHIFD 100-150 amperes 2, 3, or 4 polesATVI 225-1000 amperes 2, 3, or 4 polesATVISP 600-4000 amperes 3 or 4 polesCTVISP 600-4000 amperes 3 or 4 poles

Closed Transition

Automatic Transfer Switch with BypassIsolation (IQ Transfer)

BIHI 100-1000 amperes 2, 3, or 4 polesBIVISP 800-3000 amperes

3 or 4 polesCBVISP 800-3000 amperes 3 or 4 poles

Closed Transition

Automatic Residential/LightCommercial Transfer Switches

RTHEFD 30-200 amperes, 2-pole 240 volt,or 3-pole 208 volt only

Maintenance Bypass Switch

MBHE 100-1000 amperes 2, 3, or 4 polesMBVE 600-4000 amperes 2, 3, or 4 poles

Manual Non-Automatic Transfer Switche

MTHXFD, MT2XFD, and NTHSFD 100-15amperes 2, 3, or 4 poles

MTVX, MTDX, and NTVS 225-1000amperes 2, 3, or 4 poles

NTVS 600-4000 amperes 3 or 4 poles(Fixed or Drawout)

Medium Voltage Automatic TransferSwitches (2.4-38 kV) are available with thIQ Transfer Logic, using VCP-W or WLI/WVB technology. Contact your local Cutle

Hammer sales representative for details.

Automatic Soft Load/Closed TransitionTransfer Switches

CTVCSP 600-4000 amperes 3 or 4 poles

General Description

Index Page

Standard Automatic Transfer

Switches Solid State Logic. . . . . . . K1-2

SPB FIxed Automatic Transfer

Switches Microprocessor

Logic (IQ Transfer). . . . . . . . . . . . . . . K1-3

SPB Drawout Automatic Transfer

Switches Microprocessor

Logic (IQ Transfer). . . . . . . . . . . . . . . K1-3

Bypass Isolation Automatic

Transfer Switches . . . . . . . . . . . . . K1-4,5

IQ Transfer Microprocessor-Based

Logic . . . . . . . . . . . . . . . . . . . . . . . . . . K1-6

IQ Transfer Closed Transition

Microprocessor-Based Logic . . . . . . K1-7

Residential/Light Commercial ATS . . . . K1-8

Maintenance Bypass Switches . . . . . . . K1-9

Manual/Non-Automatic

Transfer Switches . . . . . . . . . . . . K1-9,10

Service Entrance Switches. . . . . . . . . . K1-10

Style Number Selection Guide . . . . . . K1-11

Options . . . . . . . . . . . . . . . . . . . . . . K1-12-15Technical Data. . . . . . . . . . . . . . . . . . . . K1-16

Dimensions . . . . . . . . . . . . . . . . . . . K1-17-20

Typical Specifications. . . . . . . . . . . . . . K1-21

Further Information

CAT.73.01.T.E
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CAT.71.01.T.E

Cutler-HammerK1-2

January 1999

Transfer Switches

Auxiliary contacts provide indication ofswitch position for each source.

Quick keyed disconnect plug betweenpower switching panel and logic panel.

Three levels of interlocking; two mechan-

ical interlocks and one electrical interlock

High withstand, closing and interruptingratings.

Fully Rated Neutral - A fully rated solidneutral is supplied on all two- and three-pole Cutler-Hammer Automatic transferswitches. All four-pole switches aresupplied with switched neutral contactsof identical construction and rating asthe power poles and are mounted on thepower contact shaft integral to the com-pletely enclosed contact assemblies.

High pressure, silver alloy weld resistantcontact structures.

Air Break De-ion arc quenching.

Complete 3-phase, close differentialundervoltage sensing of normal source is

standard. Normally set at 80% dropout,90% pickup and field adjustable foralternate settings.

Multi-tap transformer package permits linevoltage selection of 208, 220, 240, 380, 415,480, or 600 volts ac, 50 to 60 Hz simply byproper insertion of voltage selection plug.

Test pushbutton for testing of transferswitch operation.

Engine starting contacts that provide a10A, 30 Vdc contact closure to initiateengine starting upon failure of normalpower source.

Transfer motor disconnect plug to allowtesting of control logic circuitry withoutinitiating load transfer.

Designed in an ISO 9001 facility.

Manufactured in an ISO 9002 facility.

Optionally available as Service Equip-ment rated. See page K1-10 for detaileddescription.

Benefits

Reliable and versatile systems monitoringand interaction with all transfer switchfunctions. Offers wide array of options forcustomer design flexibility.

High withstand switching devices, totallyenclosed for maximum arc suppression andisolation during power transfer. Optional tripunits offer system overcurrent protection.

Permits true quick-break, quick-makemanual operation under full load.Operation under load is completely safeto personnel and equipment.

Provides safe, positive disconnection forelectrical isolation of the logic circuits formaintenance or manual operation.

Redundant interlocking affords the safestpossible installation to positively preventparalleling of two sources of power.

Flexible adjustable settings for ease ofapplying to specific application needs.

Modular design eases preventive mainte-nance and adapting to new applicationrequirements.

Provides the ultimate in transient isola-tion protection and versatility in applica-tion set-up. Meet IEEE surge withstandrequirements.

Type ATVS Automatic Transfer Switch

(Dead Front panel removed)

100-1000 Amperes Automatic Transfer Switches Types ATHSFD and ATVS Solid-State Logic

Features

Complies with UL 1008, and UL 489standards.

Seismic qualified for UBC and BOCAZone 4.

Meets American Bureau of Shippingapproval.

Solid-State Logic Panel.

Molded case switch power contactassemblies.

Permanently affixed safe manualoperating handle.

Transfer switch position indicator for visu-al contact position indication on the faceof the power switching device contactassemblies.

These transfer switches include the features,benefits, and ratings of the design above.They also include the advantage of micro-processor-based technology for the ATS logicby utilizing the IQ Transfer product describedon page K1-3.

IQ Transfer on an ATS (ATVI)

100-1000 Amperes Automatic Transfer Switches Types ATHIFD and ATVI with Microprocessor(IQ Transfer) Logic

General Description
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CAT.71.01.T.E

Transfer Switches

Features

Complies with UL 1008 and UL 489standards.

High withstand, totally enclosed SPBswitches.

High speed, stored energy switching

mechanism.

Mini-SPB Fixed Transfer Switch Front Accessible Full Size SPB Fixed Transfer Switch Rear Accessib

600-4000 Amperes SPB Fixed Mounted Transfer Switches Types ATVISP, CTVISP (Closed Transition) with Microprocessor (IQ Transfer) Logic

Mechanical and electrical interlocking.

Fully rated true 4th pole on common shaft.

Cutler-Hammer IQ Transfer microprocessor.See page K1-3 for detailed description.

Optionally available as Service Equipmentrated. See page K1-10 for detaileddescription.

Closed transition operation (

100 msec)available. See page K1-5 for detaileddescription of Closed Transition IQTransfer.

Benefits

The endurance and interrupting require-ments of the combined standards providethe engineer with the assurance of safeand reliable operation.

Provides the maximum arc suppressionand isolation during power transfer.

Provides the fastest switching times

available, (less than 5 cycles).

Draw-out SPB Transfer Switch

Draw-out Transfer Switch Single Line Diagram

Load

IncomingNormal

IncomingEmergency

Mechanical andElectrical Interlocking

800-4000 Amperes SPB Draw-out Transfer Switches Types ATVISP, CTVISP (Closed Transition) with Microprocessor (IQ Transfer) Logic

Features

Same reliable power contact and logicdesign as the fixed mounted SPB switchType ATVISP.

Draw-out power contacts permit truemaintainability.

Substantial cost and space savings.

Optionally available as Service Equipmentrated. See page K1-10 for detailed

description.

Closed transition (

100 msec) operationavailable. See page K1-5 for detaileddescription of Closed Transition IQTransfer.

Benefits

Draw-out power contact cassettes allowfor safe and fast isolation for inspection ormaintenance.

Critical loads can be supplied by opposingpower source during maintenance ofdraw-out contacts for minimal disruptionof power.

Reduced cost and space relative to con-ventional bypass isolation equipment.

Closed transition minimizes outages

during intentional transfer.

Ensures that the sources will not beparalleled.

Provides 4-pole switching for systemswhere switching the neutral is required.

Closed transition minimizes outages during intentional transfer.

General Description
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CAT.71.01.T.E

Cutler-HammerK1-4

January 1999

Transfer Switches

B

W W

EmergencySource

NormalSource

Key Interlock

EmergencyBypass

NormalBypass

A K

Isolating Mechanism

R

A

KEmergencyIsolation

NormalIsolation

R

A

K

Emergency NormalR G

AutomaticTransfer Switch

Load

W

LoadIsolation

Features

Complies with UL 1008 and UL 489standards

Superior Main Contact Structure

Reliable IQ Transfer Microprocessor Logic

Ease of Operation

Simple Test Circuit

Designed to safely withstand fault currents

Eliminates need for complex interlocks

Optionally available as ServiceEquipment rated

Benefits

Cutler-Hammer requires all power contactsof the Bypass Isolation Transfer Switch tomeet UL 1008, and UL 489 standards. Thisadded measure of safety and reliability en-sures the integrity of the contact assembliesand eliminates the need for periodic mainte-nance of the contacts, reducing downtimeand maintenance cost.

The Transfer Switch section of the Cutler-Hammer BIHI Bypass Isolation Switch utilizesthe Cutler-Hammer IQ Transfer Microprocessorlogic package. This provides the opportunity totailor the product to a particular application aswell as providing the capability of upgradinglogic functions as needed in the field. See pageK1-3 for detailed description.

The Cutler-Hammer BIHI Bypass IsolationSwitch utilizes foolproof mechanical Kirk Keyinterlocking and a positive isolation mecha-nism. The result is the safest, easiest to

Single Line Diagram Bypass Isolation ATS

Bypass Isolation Transfer Switch

operate Bypass Isolation Switch available inthe marketplace today.

When the Transfer Switch is in the Isolated

position, complete testing of the AutomaticTransfer Switch can be accomplished via aspecial insulated keyed connector. Thisallows the operator to completely test theentire operating sequence of the ATS whilemaintaining power to the connected load.

The BIHI Bypass Isolation Switch utilizesmodified molded case switches, designedspecifically for high duty repetitive loadtransfer, as a means to bypass and isolate thetransfer switch. These devices provide for areliable, rugged installation that can with-stand very high level short circuits.

Switch Operation Type BIHI

A major advantage of the Cutler-HammerBypass Isolation Switch is it utilizes load-break

isolation and bypass transfer powercontacts. Thus, should voltage be lost on theline to which the ATS is connected, andshould a manual bypass be required to theother line, this can be accomplished safelyand quickly as described below. With contac-tor designs utilizing non-loadbreak

isolationand bypass switches, manual bypass to theother line is hindered by mechanical or elec-trical safety interlocking.

Bypass to Normal

1. Turn Generator switch to Off.

2. Place isolating mechanism handle in

Off position.

3. Turn and remove key.

4. Place key in Normal Bypass lock.

5. Turn Normal Bypass On.

Bypass to Emergency

1. Turn Generator switch to Run.

2. Place isolating mechanism handle inOff position.


4. Place key in Emergency Bypass lock.

5. Turn Emergency Bypass On.

Return to Normal Operation

1. Place appropriate bypass in Off position.


3. Place key in isolating mechanism lock.

4. Place isolating mechanism handle inOn position.

5. Turn Generator switch to Auto.

The three Isolation Breakers areoperated by the single IsolationMechanism.

100-1000 Amperes Automatic Transfer Switch with Bypass Isolation and Microprocessor (IQ Transfer)Logic Type BIHI

General Description

Lights:

R - Bypass Energized

A - Bypass Tripped

W - Source Available

W - Load Energized

G - Normal Closed

R - Emergency Closed

B - ATS Isolated
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Cutler-Hammer

K

CAT.71.01.T.E

Transfer Switches

NormalIsolated

B

G

W

B

R

W

1 3K1 K2 R

NormalPosition

NormalSource

Available

ATSNormal

NormalBypass

Load

NormalBypassed

Emergency

Isolated

EmergencyPosition

EmergencySource

Available

ATSEmergency

EmergencyBypass

IncomingEmergency

EmergencyBypassed

2 4K2 K1 R

IncomingNormal

IncomingNormal

Features

Complies with UL 1008 and UL 489standards.

Superior SPB Main Contact Structure.

Reliable IQ Transfer Microprocessor logic.See pages K1-3 and K1-5 for detaileddescription.

Ease of Operation. Designed to safely withstand fault currents. Eliminates need for complex interlocks. Most versatile Bypass Isolation Transfer

Switch available. Cutler-Hammer Draw-out Cassette Design. Overcurrent protection available. Optionally available as Service Equipment

Rated. See page K1-10 for detaileddescription.

No Loadbreak when bypassing to thesame source.

Draw-out capabilities on both ATS andBypass portions.

Compact design. Ability to test Power Switching Elements

during draw-out process. Power Switching Devices completely

interchangeable between ATS and Bypassportions.

BenefitsThe Cutler-Hammer BIVISP Bypass IsolationTransfer Switch offers many of the samebenefits as the Type BIHI design, and more.

The BIVISP Bypass Isolation Transfer Switchfeatures draw-out SPB molded case switches,providing the ultimate in coordination flexi-bility and maintainability, making the BIVI themost versatile switch available.

Single Line Diagram of SPB Draw-out Bypass Isolation Automatic Transfer Switch

800-3000 Amperes SPB Draw-out Automatic Transfer Switch with Bypass Isolation and Microprocessor(IQ Transfer) Logic Types BIVISP, CBVISP (Closed Transition)

Draw-out SPB Bypass Isolation Transfer Switch

General Description

Switch Operation Types BIVISPCBVISP

Bypass to Normal with ATS in Normal(No Load Interruption)

1. Turn Generator selector switch to Off

2. Lift K2 lock release lever on ATSEmergency , turn and remove key.

3. Insert key in K2 on Normal Bypass,unlock and close Normal Bypass.

4. Isolate ATS Normal via draw-out hand

Bypass to Emergency with ATS in Normal(Load Interruption)

1. Turn Generator selector switch to Run

2. Lift K1 lock release lever on ATS Norma, turn and remove key (ATS Normal will open when lock engages).

3. Insert key in K1 on Emergency Bypass unlock and close Emergency Bypass.

4. Isolate ATS Normal via draw-out hand

Return to Normal Operation When Bypasseto Normal (No Load Interruption)

1. If isolated, return ATS Normal toconnected position and close same.

2. Open Normal Bypass .

3. Lift K2 lock release lever on NormalBypass , turn and remove key.

4. Insert key in K2 on ATS Emergency ,and unlock.

5. Return Generator selector switch toAuto position.

Return to Normal Operation When Bypasseto Emergency (Load Interruption)

1. If isolated, return ATS Normal to con-nected position (do not attempt to close ye

2. Lift K1 lock release lever on EmergencyBypass , turn and remove key (EmergencBypass will open when lock engages).

3. Insert key in K1 on ATS Normal , unlocand close ATS Normal .

4. Return Generator selector switch toAuto position.

Use of Bypass Switch as ManualTransfer Switch

1. Removal of K1 and K2 lock keys from ATand placement of lock keys in appropriaBypass devices (as described above) wilpermit the Bypass Switch to be operatedas a true Manual Transfer Switch.
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CAT.71.01.T.E

Cutler-HammerK1-6

January 1999

Transfer Switches

The IQ Transfer is a microprocessor-basedlogic controller to be used with Cutler-Hammer transfer switches. This device isdoor-mounted and provides the operatorwith an at-a-glance overview of switch statusand parameters, as well as key diagnosticdata. Real time values for volts andfrequency can be viewed via the front panelLED display, along with an indication of thepower source currently in use.

The IQ Transfer continuously monitors either

single-phase or three-phase voltages forSource 1, Source 2, and the Load. When theSource 1 voltage or frequency is detected tobe below the customer programmed set-points, transfer to Source 2 is initiated. Whenthe Source 2 voltage and frequency aredetected to be within the programmedparameters, the transfer occurs. While theLoad is connected to Source 2, the IQ Trans-fer continues to monitor Source 1. As soon asthe Source 1 voltage and frequency return towithin the programmed limits, and after aprogrammed time delay, the load transferback to Source 1 is initiated.

The IQ Transfer uses microprocessor technol-ogy to provide the operator with a vast array

of selections. Depending on the application,the user can customize the IQ Transferto meet his particular need. A summary ofseveral key selections is listed in Table 1:

Table 1: Programming Selections

Parameters Setpoints

TDNE 0 Sec to 1800 Sec

TDEN 0 Sec to 1800 Sec

TDEC 0 Sec to 1800 Sec

TDES 0 Sec to 120 SecTDN 0 Sec to 120 Sec or

Based on Load Voltage Decay(10-30% of Nominal Voltage)

Load Sequencing 0 to 10 Devices

Pre-TransferSignal Device

0 to 120 Sec(Up To 10 Devices)

Plant Exerciser Load or No Load Transfer(Selectable)

Preferred SourceSelector

Source 1 or Source 2 or None

Sensing 3-Phase or 1-Phase

System Selection Utility/Generator or DualUtility or Dual Generator

The IQ Transfer is equipped to display historyinformation either via the front panel or overIMPACC/PowerNet. Source 1 and Source 2Run Time, Available time, and Connect timeare available as well as Load Energized Time,Number of Transfers, and the Date, Time andReason for the Last 16 Transfers.

For communications capability, the IQ Trans-fer can be equipped with a PONI card whichwill allow the user to communicate with theunit via Series III software. All settings forpurchased options can be set from the face-plate of the unit or downloaded over IMPACC/PowerNet. Series III software allows for chart-ing of key historical data as well as providesthe capability to monitor and control thetransfer switch from a remote location.

For further information on IMPACC/PowerNetproducts and software see section B.

IQ TransferMicroprocessor-Based Logic

Table 2: Specifications

Input Control Power Range: 65 Vac rms to 160 Vac rms (50/60 Hz)Voltage Measurements of: Source 1 VAB Source 2 VAB Load VAB

Source 1 VBC Source 2 VBC Load VBCSource 1 VCA Source 2 VCA Load VCA

Voltage Measurement Range: 0 to 790 Vac rms (50/60 Hz)Voltage Measurement Accuracy: 2% of nominal input voltageFrequency Measurement for: Source 1 and Source 2Frequency Measurement Range: 40 Hz to 80 HzFrequency Measurement Accuracy: 0.1 HzUndervoltage Sensing: Source 1 and Source 2Undervoltage Dropout Range: 50% to 90% of nominal voltageOvervoltage Dropout Range: 105% to 120% of nominal voltageUnder Frequency Dropout Range: 90% to 100% of nominal frequencyOver Frequency Dropout Range: 100% to 120% of nominal frequency

Contact Outputs:Two Form A Contacts for Generator start: 5A 250 Vac

5A 30 Vdc

Four Form A Contacts for Control Functions: 10A 250 Vac10A 30 Vdc

Three Form C Contacts for Control Functions: 10A 250 Vac10A 30 Vdc

Communications Output Over IMPACC/PowerNet: (Optional)PONI (Product Operated Network Interface)

Front Panel Indications:Automatic Mode: Blinking LED indicates Automatic operationTest Mode: LED illuminated indicating the unit is in the TEST modeProgram Mode: LED illuminated indicating the unit is in the Program mode

Blinking LED indicates user is viewing setpoints in Program mode

LED Lights to Indicate: Source 1 Available (Amber) Source 2 Available (Amber)

Source 1 Connected (Green) Source 2 Connected (Red)Source 1 Preferred (Red) Source 2 Preferred (Red)

Load Energized (Red)LED Display to Indicate: History Information

SetpointsReal Time Clock

Environmental Temperature Range:Operation: -20C to +70CStorage: -30C to +85C

Applicable Standards:UL 1008UBC and BOCA for Seismic Zone 4

Optional features.

General Description
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Cutler-HammerK

CAT.71.01.T.E

Transfer SwitchesTransfer Switches

General Description

Introduction

The Closed Transition IQ Transfer (CTIQTransfer) is a programmable, microprocessor-based monitoring device designed for use inCutler-Hammer Closed Transition TransferSwitches (CTVI/CBVI). By using the Cutler-Hammer CTIQ Transfer, the user may avoidintentional interruption of power when bothsources of power are available. This make-before-break mode of operation is usefulduring testing of the engine generator underload and where a predetermined transfer tothe generator is desired. Source paralleling

duration is limited to less than 100 msec.

Passive Closed Transition

The Closed Transition mode of operation re-quires that both power sources be synchro-nized in voltage, frequency and phase anglewithin prescribed limits. Cutler-HammersCTIQ Transfer utilizes a technique that in-volves waiting for synchronization of the twosources without actively controlling the gen-erators voltage or frequency. The mode ofoperation is anticipatory in that the switchclose command is initiated before the sourcesare exactly in phase. Utilizing the phase angleand frequency difference between the twosources, a calculation is made to predict whenboth sources would be in phase. The

response time of the switch is then factored into determine when the switch close signalshould be given to assure optimal closure ofthe two sources in phase.

Application Considerations

The generator used with a closed transi-tion transfer switch must be equippedwith an isochronous governor.

When paralleling sources, fault currentcontributions from both sources shouldbe considered in the system design.

Table 1: Programming Selections

Parameters Setpoints

TDNE 0 to 1800 Seconds

TDEN 0 to 1800 Seconds

TDEC 0 to 1800 Seconds

TDES 0 to 120 SecondsTDN

0 to 120 Seconds or

Based on Load Voltage Decay(10-30% of Nominal Voltage)

Closed Enabled or Disabled

CTFD 0.0 to 0.3 Hz

CTVD 1 to 5% (voltage)

I Phase Enabled or Disabled

IPFD 0.0 to 3.0 Hz

SYNC 1 to 60 Minutes

Load Sequencing

0 to 10 Devices

Pre-TransferSignal Device

0 to 120 Seconds(Up to 10 Devices)

Plant Exerciser

Load or No Load Transfer(Selectable)

Preferred SourceSelector

Source 1 or Source 2 or None

Sensing 3-Phase or 1-Phase

System Selection Utility/Generator or DualUtility or Dual Generator

Closed Transition (make before break)Technology causes paralleling with theutility. It is the users responsibility to comply with any requirements regarding protective relaying. Protective relaying is nosupplied with the standard transferswitch, but is available.

The IQ Transfer is equipped to display historinformation either via the front panel or oveIMPACC/PowerNet. Source 1 and Source 2Run Time, Available Time, and Connect Timare available as well as Load Energized TimeNumber of Transfers, and the Date, Time anReason for the Last 16 Transfers.

For communications capability, the IQ Tranfer can be equipped with a PONI card whichwill allow the user to communicate with theunit via Series III software. All settings forpurchased options can be set from the faceplate of the unit or downloaded over IMPACPowerNet. Series III software allows for chaing of key historical data as well as provide

the capability to monitor and control thetransfer switch from a remote location.

For further information on IMPACC/PowerNproducts and software see section B.

Closed Transition IQ TransferMicroprocessor-Based Logic

Table 2: Specifications

Input Control Power Range: 65 Vac rms to 160 Vac rms (50/60 Hz)Voltage Measurements of: Source 1 V

AB

Source 2 V

AB

Load V

AB

Source 1 V

BC

Source 2 V

BC

Load V

BC

Source 1 V

CA

Source 2 V

CA

Load V

CA

Voltage Measurement Range: 0 to 790 Vac rms (50/60 Hz)Voltage Measurement Accuracy:

2% of nominal input voltageFrequency Measurement for: Source 1 and Source 2Frequency Measurement Range: 40 Hz to 80 Hz

Frequency Measurement Accuracy:

0.1 HzUndervoltage Sensing: Source 1 and Source 2Undervoltage Dropout Range: 50% to 90% of nominal voltageOvervoltage Dropout Range

: 105% to 120% of nominal voltageUnder Frequency Dropout Range

: 90% to 100% of nominal frequencyOver Frequency Dropout Range

: 100% to 120% of nominal frequency

Contact Outputs:

Two Form A Contacts for Generator start: 5A 250 Vac; 5A 30 VdcFour Form A Contacts for Control Functions: 10A 250 Vac; 10A 30 VdcThree Form C Contacts for Control Functions: 10A 250 Vac; 10A 30 Vdc

Communications Output Over IMPACC/PowerNet: (Optional)

PONI (Product Operated Network Interface)

Front Panel Indications:

Automatic Mode: Blinking LED indicates Automatic operationTest Mode: LED illuminated indicating the unit is in the TEST modeProgram Mode: LED illuminated indicating the unit is in the Program mode

Blinking LED indicates user is viewing setpoints in Program modeLED Lights to Indicate: Source 1 Available (Amber) Source 2 Available (Amber)

Source 1 Connected (Green) Source 2 Connected (Red)Source 1 Preferred (Red) Source 2 Preferred (Red)Load Energized (Red)

LED Display to Indicate: History InformationSetpointsReal Time Clock

Environmental Temperature Range:

Operation: -20

C to +70

C Storage: -30

C to +85

C

Applicable Standards:

UL 1008 UBC and BOCA for Seismic Zone 4

Optional features.
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CAT.71.01.T.E

Cutler-HammerK1-8

January 1999

Transfer Switches

120V

Neutral

53

TDES

Plant ExerciserOption 23C

PE13

24

54

53

52

51

Option 23C

Option 2

72

1314NR

Motor

ER

TDNE

Option 1

Option 1

TDNE(WhenUsed)

14

1314

13311

ELS

Option 5 VSR-E

Option 5

VSR-E

To

E2 56

VSR-E NR

11

21

5

9NR

Engine Start

(Standard)

1

9

1

4

Engine Start

w/ Option 2 TDES

52

51

52

51

ER

NR

NLS

54

55

56

VSR-N

VSR-N

PE13

24To

54To53

Option 2

Option 23DPlant

Exerciser

6 5J

J

21

CNC

CNC

128

128

4

ER9 1

TDNE

Option 1

Option 3Plant

Exerciser

1 3

E1 E2Emergency

N1 N2Normal

L1 L2

Load

Option 2(When Used)

Features UL 1008 listed NEC Article 700 conformance Normal/standby source monitoring Molded case switch contacts Engine start contacts Transfer mechanism Logic panel Fully automatic operation NEMA 1 enclosure NEMA 3R enclosure optional

Product Description

A compact line of Residential/Light Commer-cial Automatic Transfer Switches availablefor application on 120, 120/208, 120/240 voltsystems; 30, 70, and 100 Amperes; 2- or3-pole.

Available Options

In addition to the standard features and

accessories, the following optional featuresand accessories are also available to matchyour application requirements:1 Time delay normal to emergency

(3-60 seconds)2B Time delay engine start

(.5-15 seconds)2C Time delay engine start

(4-120 seconds)3 Time delay emergency to normal

(24-480 seconds)5D Single phase undervoltage sensing

on standby13B 3-wire start circuit23C Plant exerciser without load23D Plant exerciser with load

30-150 Amperes Automatic Residential/Light Commercial Transfer Switches Type RTHEFD

Residential/Light Commercial Transfer Switch

General Description

Typical Wiring Diagram

Panel Interior


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January 1999

Cutler-HammerK

CAT.71.01.T.E

Transfer Switches

Single Line Diagram of Maintenance Bypass Swit

Maintenance Bypass SwitchesType MBHE 100-1000 AmperesType MBVE 1200-4000 Amperes

The Cutler-Hammer Maintenance BypassSwitch is a UL 1008 listed device thatprovides a simple and effective means for

bypassing uninterruptable power supplieswhile maintaining continuity of power to thecritical computer loads. A maintenancebypass switch is a requirement on every UPSinstallation in order to accommodate themaintenance and testing of the UPS System.

Features

UL 1008 Listing File E61639.

Make before break electrical operation.

Lockout circuit to be wired into the UPSbypass authorization.

Pilot devices to show UPS positionNormal and Bypassed.

Pilot device to show Lockout enabled.

Reliable manually initiated electricaloperation.

High interrupting ratings are standard.

Molded case switch or circuit breakerdesigns are available.

Solid neutral connections are standard.

Benefits

Safe and reliable operation is ensured due

to the simple and durable switching design.

Unauthorized bypass is prevented by theneed of UPS System to send the bypassauthorized signal.

Type MBHE Maintenance Bypass Switch

100% current ratings makes selection tothe UPS kVA ratings easy to accomplish

Use of interrupting rating switches orbreakers makes the maintenance bypassswitches adaptable to systems with highlevels of available fault current.

UPS System

LockoutCircuit

ComputerLoads

UPSInputBreaker

Incomingfrom Switchboard

MaintenanceBypassSwitch

Features

Molded case switch power contactassemblies.

Positive mechanical interlocking.

Permanently affixed manual operatinghandle (MTHXFD and MTVX).

Pushbutton operation (NTHSFD and

NTVS).

Benefits

High withstand, totally enclosed for maxi-mum arc suppression and isolation duringpower transfer. Optional trip units offersystem overcurrent protection.

Prevents the paralleling of two sources ofpower. Types NTHSFD and NTVS are alsoelectrically interlocked.

Permits safe and convenient manualtransfer of power.

Allows transfer of power under load viaexternal push button (NTHSFD and NTVSonly) initiated operation.

Type NTHSFD and NTVS can be easily up-graded to fully automatic operation.

Type MTHXFD 100-150 Amperes Type NTHSFD 100-150 Amperes

Manual Single Handle Operated TransferSwitches

Engineered for those applications requiringmanual transfer of power.

Manual Electrically Operated Non-AutomatTransfer Switches

Manually initiated, electrically operatedswitches for use in applications where anautomatic load transfer is not necessary.

Manual/Non-Automatic Transfer Switches

General Description
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CAT.71.01.T.E

Cutler-HammerK1-10

January 1999

Transfer Switches

Mechanical Interlock (Rear View, Power Panel) Type NTVS 225-1000 Amperes(1200-4000A Not Shown)

Type MTVX 225-1000 Amperes(Dead Front Panel Removed)

Manual/Non-Automatic Transfer Switches

Typical ATS Application

Service Equipment Rated Transfer Switches

Cutler-Hammer Service Equipment TransferSwitches (Option 37) are the same as other

transfer switch products with the addition of aservice disconnect function accessible exter-nally on the enclosure door. A two-positionselector switch with padlockable cover permitsload disconnecting with opening the enclosuredoor. The service equipment transfer switch isalso equipped with external visual indication ofthe service disconnect position. Integral over-current protection (Option 16B) is also includedwith the service equipment transfer switchthereby eliminating the need for separateupstream protective devices.

Features

Service disconnect function.

Integral overcurrent protection.

Totally integrated design.

Increased system reliability.

Solid-state IQ Transfer microprocessorlogic design.

Visible indication of service disconnected.

Lockout in disconnected position.

Ground fault protection available on allswitch ratings required by code onratings 1000 amperes and above at 480V.

Disconnecting neutral assembly.

Molded case circuit breaker transferswitch.

Benefits

Lockable disconnect permits safedownstream maintenance.

Eliminates the need for separateupstream protective devices.

Combined service disconnect,overcurrent protection, and transferswitch functions substantially reduceoverall equipment and installation costsand saves space.

Fewer components and power intercon-nections maximize circuit integrity andminimize maintenance requirements.

Same rugged, time-proven design utilizedon other Cutler-Hammer transfer switchproducts.

ATS Application with Optional ServiceEquipment Feature

Service Entrance Control Panel

Utility Service

Generator

GeneratorBreaker

ATS

ServiceDisconnect

Load

Utility Service

Generator

Load

Cutler-Hammer ATSWith Optional ServiceEquipment Feature

General Description
http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/


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January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

Style Number Selection Guide

The Style Selection Guide permitsat-a-glance specification of custom TransferSwitch configurations to meet all applicationrequirements.

The Style Selection Guide allows the specifierto generate a 15-digit catalog number whichrepresents ten basic style/featurecategories:

Type Orientation Logic Frame Switch Poles Ampere Rating Voltage Enclosure Type Listing

Each category is associated with a selectionmenu. By choosing the appropriate selectionfrom the menu for each category in sequenceand incorporating the associated selectioncode into the catalog number, the specifierconstructs a unique catalog number whichdescribes the desired switch configuration.

The catalog number can then be modifiedthrough the addition of appropriate optioncodes.

Example 1:

Solid-State Logic Automatic TransferSwitch, 480/277 V, 60 Hz, 3-Phase, 4-Wire,3-Pole, 600-Ampere, UL 1008 listed, NEMA3R enclosure with Options 1, 2B, 3, 4 and 5B.

Specify Number: ATVSMAA30600XSUwith Options 1, 2B, 3, 4 and 5B.

Example 2:

Solid-State Logic Automatic TransferSwitch, 480/277V, 60 Hz, 3-Phase, 4-Wire,3-Pole, 3000-Ampere UL 1008 Listed,NEMA 1 enclosure with Options 2B, 3, 4,5B, 12C, 12D and 23J.

Specify Number: ATVISPA33000XRU withOptions 2B, 3, 4, 5B, 12C, 12D and 23J.

AT V S MA A 3 0600 X S U

TYPEPosition 1-2

AT = AutomaticNT = Non-Auto Elec OpMT= Non-Auto

Manual OpMB= Maintenance

BypassBI = Bypass IsolationRT = ResidentialPP = Power Panel

CT = Closed TransitionCB = Closed Transition/Bypass Isolation

ORIENTATIONPosition 3

H = Horizontal(Used with allswitches 150Aand below,all Residential,all Non-SPBBypass/IsolationSwitches andNon-SPBMaintenanceBypass Switches)

V = Vertical(All others)

LOGICPosition 4

E = Electromechanical (RT Only)S = Solid State (100-1000A Only)I = IQ TransferX = No LogicC = Soft LoadD = Sub-cycle

FRAMEPosition 5-6

Molded CaseFD = 30-150AKD = 225-300ALD = 400AMA= 600ANB = 800-1000AND = 800-1000ASPB StyleSP = 600-4000A

POLESPosition 8

2 = 2 Poles3 = 3 Poles4 = 4 Poles

AMPERESPosition 9-12

0030 = 30A 0800 = 800A0070 = 70A 1000 = 1000A0100 = 100A 1200 = 1200A0150 = 150A 1600 = 1600A0225 = 225A 2000 = 2000A0300 = 300A 2500 = 2500A0400 = 400A 3000 = 3000A0600 = 600A 4000 = 4000A

VOLTAGEPosition 13

A = 120V 60 HzB = 208V 60 HzE = 600V 60 HzG = 220V 50/60 HzH = 380V 50 HzK = 600V 50 HzM = 230V 50 HzN = 401V 50 HzO = 415V 50 HzW = 240V 60 HzX = 480V 60 HzZ = 365V 50 Hz

ENCLOSUREPosition 14

K = Open (NoEnclosure)

S = NEMA 1J = NEMA 12R = NEMA 3RL = NEMA 4D = NEMA 4X

LISTINGPosition 15

U = UL ListedR =

(Recognized)X = No Listing

With 4-pole, 600 amperes use NB. Not available with Relay Logic. Contact factory for availability. Not available on 100 kAIC rated SPB type switches. Available with SPB style only.

SWITCHPosition 7

A = Fixed Mounted, Molded Case Switch (MCS) BothB = Fixed Mounted, Molded Case Circuit Breaker

(MCCB) BothC = Fixed Mounted, MCCB Normal, MCS EmergencyD = Fixed Mounted, MCS Normal, MCCB EmergencyE = Draw-out, MCS Both

F = Draw-out, MCCB BothG = Draw-out, MCCB Normal, MCS EmergencyH = Draw-out, MCS Normal, MCCB Emergency

ADD OPTIONNUMBERS

Note: Standard generator option package0G9 includes Options 1, 2b, 3, 4, 5b, 12C,14C, 14D.

General Description


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CAT.71.01.T.E

Cutler-HammerK1-12

January 1999

Transfer Switches

Optional Features for AutomaticTransfer Switches

Optional Features/Accessories

- Listed beloware Optional Features/Accessories that willallow you to customize a Cutler-HammerAutomatic Transfer Switch to your particularapplication. All Features/Accessories areUnderwriters Laboratories, Inc. listed unlessnoted otherwise.

1.

Time Delay Normal to Emergency (TDNE)

- Provides a time delay when transferringfrom the Normal Power Source to theEmergency/Standby Power Source. Timingbegins when the source voltage of theemergency/standby power source appears.Adjustable 1 second - 64 minutes.

2.

Time Delay Engine Start (TDES)

- Thisoption is for use when the Emergency/Standby Source is an engine generator. Itdelays initiation of the engine start circuitin order to override momentary power

outages or voltage fluctuations of thenormal power source.

B. Adjustable .5-15 seconds

C. Adjustable 4-120 seconds

3.

Time Delay Emergency to Normal (TDEN)

- Delays the transfer from the Emergency/Standby Power Source to the NormalPower Source to permit stabilization ofthe normal power source before retrans-fer is made. Timing begins when theNormal Power Source appears. If theEmergency/Standby Source fails duringtiming, transfer to the normal powersource is immediate, overriding the timedelay. Adjustable 1 second 64 minutes.

4.

Time Delay Engine Cooldown (TDEC)

-Permits the generator to continue to rununloaded after retransfer to normal hasoccurred. Timing begins when transfer ismade. Adjustable 1 second 64 minutes.

5.

Emergency/Standby Source Monitoring

Provides more precise voltage and/orfrequency monitoring of the Emergency/Standby Power Source. Relay preventstransfer from the Normal Power Sourceto the Emergency/Standby Power Sourceuntil that source is within a pre-selectedrange. In addition, when the switch is inthe Emergency/Standby position andthat source falls outside the monitored

parameters, a load transfer is initiated tothe Normal Power Source if it is present.

B. Single-Phase Undervoltage/UnderFrequency Monitor Provides single-phase voltage/frequency sensing. Fre-quency sensing is set at 56 Hz Dropoutand 58 Hz Pickup (60 Hz applications).Voltage sensing is set at 80% Dropoutand 90% Pickup of nominal voltage.

C. Single-Phase Overvoltage/Over Fre-quency Monitor - Provides single-phase

voltage/frequency sensing. Frequencysensing is set at 64 Hz Dropout and62 Hz Pickup (60 Hz applications).Voltage sensing is set at 115% Dropoutand 110% Pickup of nominal voltage.

D. Undervoltage Monitor Provides

adjustable single-phase voltagesensing, nominally set at 90% pickup,80% dropout.

E. Overvoltage Monitor Providesadjustable single-phase voltagesensing, nominally set at 115% pickup,110% pickup.

F. Undervoltage Monitor Providesadjustable three-phase voltagesensing, nominally set at 90% pickup,80% dropout.

G. Overvoltage Monitor Providesadjustable three-phase voltagesensing, nominally set at 115% pickup,

110% pickup.

H. Phase Reversal Provides protectionfrom reversal of phases on theEmergency side.

J. Three-Phase Undervoltage/UnderFrequency Provides three-phasevoltage/frequency sensing. Frequencysensing is set at 56 Hz Dropout and58 Hz Pickup (60 Hz applications).Voltage sensing is set at 80% Dropoutand 90% Pickup of nominal voltage.

K. Three-Phase Overvoltage/OverFrequency Provides three-phasevoltage/frequency sensing. Frequencysensing is set at 64 Hz Dropout and

62 Hz Pickup (60 Hz applications). Volt-age sensing is set at 115% Dropoutand 110% Pickup of nominal voltage.

6.

Alternate Test Operators

All Cutler-Hammer Automatic Transfer Switches aresupplied with a Test Pushbutton as a stan-dard Feature/Accessory. When one of thefollowing alternatives is selected, the TestPush Button is omitted.

D. Test Selector Switch (TSS) Providesa two-position maintained contactmarked AUTO, TEST. Test opera-tion of the Automatic Transfer Switchby simulating a loss of the NormalPower Source, causing the engine to

start and initiate a load transfer to theEmergency/Standby Power Source.

H. Four-Position Test Selector Switch(FPSS) Marked Test, Auto,Engine Start, and Off. Permits fourmodes of Transfer Switch operation.The Test position simulates a failureof the Normal Power Source and func-tions like the standard Test SelectorSwitch. The Auto position is the regu-lar operational mode. The Off posi-tion de-energizes the control logicrelays and opens the engine start circuit.

A white pilot light is provided to indicatethat the FPSS is in the Off position.The Engine Start position providestesting of the engine start circuit by clos-ing the engine starting contacts andallowing the engine to run unloaded.

8.

Transfer Time Delay Bypass

Provides amanual pushbutton operated bypass onthe TDNE (Optional Accessory 1) and/orthe TDEN (Optional Accessory 3) functionpermitting the switch to be transferred toeither Power Source without a time delay.

C. Bypass TDEN pushbutton (PBEN)

D. Bypass TDNE pushbutton (PBNE)

9.

Maintenance Selector Switch (MSS)

Marked OFF, ON. Provides selectorswitch disconnection of control power tothe Transfer Motor circuit thus allowingtesting of the Transfer Switch Controllogic circuitry without initiating load

transfer. (Manual disconnection is stan-dard on all Automatic Transfer Switches.)Positioning the MSS in the Off positionisolates the control logic circuit from theTransfer Motor, permitting manual opera-tion of the Transfer Switch or testing oflogic circuitry without load transfer.

B. Maintained Contact MSS

10.

Preferred Source Selector Switch (PSSS)

Permits the selection of either source asthe Preferred source. MarkedSOURCE 1, SOURCE 2.

B. PSSS for use on systems comprised ofDual Utility or Utility/EngineGenerator power sources.

D. PSSS for use on systems comprised ofDual Engine Generator power sources.(Dual Engine starting circuits are pro-vided when option/accessory 10D isselected.)

12.

Indicating Lights

Switch Positions

C. Green Pilot Light (NL) indicates thatthe load is connected to the NormalPower Source. Marked NORMAL.

D. Red Pilot Light (EL) indicates that theload is connected to the Emergency/

Standby Power Source. MarkedEMERGENCY.

Source Availability

G. White Pilot Light (SN) indicates volt-age is present on the line side of theNormal Power Source. MarkedNORMAL SOURCE.

H. White Pilot Light (SE) indicates voltageis present on the line side of theEmergency/Standby Power Source.Marked EMERGENCY SOURCE.

General Description
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January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

Tripped Condition (Available only whenintegral overcurrent protection selected Option 16). A common trip indicator light isprovided as standard on SPB type switches(ATVISP, CTVISP, BIVISP, CBVISP, NTVSSP)when supplied with Option 16.

L. Amber Pilot Light (TN) indicates over-current trip condition on normal sidemain contacts.

M.Amber Pilot Light (TE) indicates over-current trip condition on emergencyside main contacts.

14.

Relay Auxiliary Contacts

Three Form Ccontacts are provided on all AutomaticTransfer Switches utilizing solid-statelogic sensing.

C. Normal Source Relay AuxiliaryContacts (NRA) Energized whenthe load is connected to the NormalPower Source Power Supply and

Normal voltage is present.

D. Emergency/Standby Source RelayAuxiliary Contacts (ERA) Energizedwhenever Emergency/StandbySource voltage is present.

16.

Integral Overcurrent Protection

Provides overcurrent protection integral tothe Power Switching Device(s). Use of theoption/accessory can, in many cases,eliminate the need for separate upstream,overcurrent/short circuit protection. Inaddition to overcurrent protection, forsafety purposes, selection of this optionalaccessory also includes a lock-out functionthat prevents further automatic transferoperation until the appropriate source is

manually reset. Units rated 1200 Amps andgreater will also be supplied with an amberindicating light marked Tripped Condi-tion indicating an overcurrent trip status.(See Options 12 L and M for trip lights onunits 1000 Amps and below.)

Thermal Magnetic OvercurrentProtection

B. Overcurrent Protection on Both PowerSources.

E. Overcurrent Protection on the Emer-gency/Standby Power Source only.

N. Overcurrent Protection on the NormalPower Source supply only.

17.

Alternate High Withstand Power Switch

C. Increases withstand from 65 kA to100 kA @ 480V for 600 through1200 Amps. (Available on SPBtype switches only.)

18.

Metering and Communications

The IQ Family of microprocessor-baseddigital meters offers the latest technologi-cal advances in metering and communi-cations functions for todays complex

system designs. Line side voltage ismonitored phase-to-phase and phase-to-neutral with 1% accuracy, and current ismonitored from each phase of the con-nected load with 1% accuracy. Frequencyis monitored from the line side of thesource with .5% accuracy. The entire IQ

Family is also available with remote mon-itoring and communications capabilitiesvia the Cutler-Hammer Type IMPACC/PowerNet System. (For additional infor-mation, please refer to section B5).

IQ Generator

The IQ Generator is amicroprocessor-based monitoring devicethat provides simultaneous current, volt-age and frequency metering. Includes CTs,PTs and power module required for opera-tion and can be supplied on the NormalPower Source, the Emergency/StandbyPower Source, or with a selector switchallowing reading for both power sources.

I. Normal

J. Emergency

K. Both N and E

IQDP4000

The IQDP4000 is amicroprocessor-based monitoring devicethat provides ammeters, voltmeter, watt-meter, watt-hour meters, and more.The IQDP4000 includes the CTs, PTs andpower module required for operationand can be supplied on the normal oremergency/standby power.

L. Normal

M. Emergency

N. Both N and E

P.

IMPACC/PowerNet Communications

For applications requiring remotemonitoring and/or communicationscapabilities

20.

Rear Bus Provisions Standard 30 1000 Ampere Cutler-Hammer TransferSwitches are assembled with frontconnected solderless lugs. Standard1200-4000 Ampere Switches are assem-bled with rear connected solderless lugs.

A. Rear Bus Provisions Provide sepa-rate bus stabs extending to the rearfrom the line side of the Normal and

Emergency/Standby Power SwitchingDevices as well as common loadstabs, allowing the installer to connecthis bus to the transfer switch.

21.

Optional Terminals

A. Refer to Wire Terminal Data, Page 307,to make the appropriate selection foryour applications.

23.

Plant Exerciser (PE)

Solid-state, digital clock timer providesmeans for automatic testing of the Emer-

gency/Standby Power Plant. This deviceis programmable to allow a maximum o10 programs of automatic testing perweek. Run time is fully adjustable with sepoints from 1 second to 168 hours.

C. Engine Start/Run Only Starts

Emergency/Standby Power Plant andruns engine without load transfer.However, if the Normal Power Supplyfails during the exercise period, loadtransfer will occur.

D. Exercise With Load Transfer StartsEmergency/Standby Power Plant andinitiates load transfer. Automaticallytransfers back to the Normal PowerSource at the end of the Exerciseperiod.

G. Exercise With or Without LoadTransfer Programmable to allow seletion of Engine Start/Run only. Exercisewith Load Transfer, or a complete

bypass of the Exercise system. Includeselector switch marked Engine Run,Bypass, Load Transfer.

I. Exercise with Load Transfer andFailsafe Feature Similar to OptionalAccessory 23D except with FailsafeFeature. This feature provides an immediate transfer to the Normal PowerSource if Emergency/Standby PowerSource fails during exercising period.

J. Exercise With or Without Load Trans-fer and Failsafe Feature Similar toOptional Accessory 23G except withFailsafe Feature. If the Emergency/Standby Power Source should failwhile Exercising in the Load Trans-

fer mode, an immediate retransfer tthe Normal Power Supply will occur.

24.

Battery Charger (BC)

Fully automatic 5-ampere float batterycharger for engine cranking batteries. Useferroresonant transformer technologywhich is self-regulating and completelydevoid of any complicated switching cir-cuits. The charger comes in its own #304stainless steel housing for separate mouning and includes a DC Ammeter allowinginstant visual identification of charger output status. Unit requires a separate 100-135 VAC/60 Hz power supply for hookup.

C.Battery Charger with 12 Vdc output

D. Battery Charger with 24 Vdc output

26.

Type of Protection (Normal Source)

Full phase protection is standard. A volt-age sensing relay monitors each phase othe normal power supply. Normally set a80% dropout and 90% pickup.

C. Overvoltage Monitor Provides threephase voltage sensing. Set at 115%Dropout and 110% Pickup of nominalvoltage. Adjustable over a wide rangof settings.

General Description
http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/


14/30

CAT.71.01.T.E

Cutler-HammerK1-14

January 1999

Transfer Switches

D. Area Protection (Interruptible Rate)Connections With Override Circuit Provides two terminal blocks forconnection of one or more NO (openwhen there is no voltage) area protec-tion contacts; these terminal blocksare wired in the same manner as the

test switch and when the NO areaprotection contact opens, the switchinitiates engine start and will transferto Emergency Power Source. In theevent that the NO area protection con-tact remains open and the EmergencySource fails when the switch is in theEmergency position, an overridecircuit will retransfer the switch to theNormal Source if it is available.

E. Under frequency, adjustable 45-60 Hz(drops out 2 Hz lower than setting). Afrequency sensing relay is connectedto 1 phase only of the Normal Source,constantly monitoring that phase.

F. Over frequency, adjustable 50-65 Hz(Drops out 2 Hz above setting). Afrequency sensing relay is connectedto 1 phase only of the Normal Source,constantly monitoring that phase.

G. Phase Reversal Provides protectionfrom reversal of phases on theNormal side.

29. Type of Operation

A. Automatic operation is standard.Provides for automatic transfer andretransfer from source to source asdictated by the reset values of thetransfer switch intelligence circuits.

E. Push button to return to normal.Automatic operation Normal toEmergency. Pushbutton operationEmergency to Normal. Includesfailsafe feature providing immediateretransfer to Normal if Emergencyfails while in that position.

G. Automatic/Manual Operation. Two-posi-tion selector switch (marked Auto/Man-ual) permits selection of Automatic orManual operation. Includes pushbut-tons for manual operation when selec-tor switch is in the manual position.

J. Automatic/Pushbutton OperationReturn to Normal. Two-position selec-

tor (marked Auto/Manual) permitsselection of automatic or pushbuttonoperation Emergency to Normal, auto-matic Normal to Emergency. IncludesOption 29E which only operates toreturn to Normal when the switch is inthe manual mode.

*ATS must be labeled as non-automatic-transfer switch equipment.

*

30.

Cranking Limiter

A. Adjustable 0-120 seconds. Interruptsengine start circuit if voltage does notappear within preselected time.

32.

Inductive Load Transfer

A. Delayed transition Time Delay pro-vides a time delay in the Neutral (OFF)position when the load is transferredin either direction to prevent excessiveinrush currents due to out-of-phaseswitching of large inductive loads. Uti-lizes one normally open breaker con-tact.

B. Delayed Transition Load VoltageDecay Provides a delay in the neutral(OFF) position based on measuredload voltage (adjustable between 10and 30% of nominal system voltage)when the load is transferred in eitherdirection to prevent excessive inrush

currents due to out of phase switchingof large inductive loads.

Note: Only available on transferswitches with IQ Transfer logic.

C. In-Phase Monitor minimizes the possi-bility of excessive inrush currentscaused by an out-of-phase transfer byonly allowing a transfer when the twosources are in synchronization. Thisoption does not control the generatorgovernor or regulator, and thereforedepends on the coincidental synchro-nization of the sources.

Note: Only available on transferswitches with IQ Transfer logic.

D. In-Phase/Time Delay Neutral. In-phasetransition is a feature that will allow atransfer between two live sources onlywhen the phase difference betweenthe two sources is near zero. This is anopen transition transfer that preventsinrush currents from exceedingnormal starting currents in the casewhere motor loads are beingtransferred.

Time Delay Neutral provides a timedelay in the transfer switch Neutralposition when both breakers are open.This delay takes place when the load istransferred in either direction to pre-

vent excessive inrush currents due toout-of-phase switching of large motorloads. This feature is not availablewith the Time Delay Neutral Load(TDNLD) feature.

33.

Shunt Trip

Wired to terminal blocks for customerconnection.

A. Supplied in normal side

B. Supplied in emergency side

34.

Extender Cable

Permits remote mounting of intelligencecircuitry to accommodate limited spaceapplications.

A. 48 inches

B. 72 inches

C. 96 inches

D. 120 inches

E. 144 inches

35.

Pre-Transfer Signal Device

Contacts open/close on a timed basis(adjustable 0-120 seconds) to allow theload to be de-energized prior to transferin either direction. (Typically used in con-junction with elevator controls.)

A. Form C contacts (2NO, 2NC)

36.

Load Shed From Emergency

Providesfor accepting customer supplied externaldry contact closure which will initiate atransfer operation from the connectedemergency position to a both off positionfor as long as customer signal is present.If normal returns, transfer to the normalposition is permitted. This option is oftendesirable where multiple engines arefeeding a common emergency bus.

37.

Service Equipment Rated TransferSwitches

See page 302 for detailed description.

A. SE, rated without GFP

B. SE, rated with GFP

41.

Space Heater with Thermostat

A. 100W

B. 200W

C. 400W

42.

Seismic Certification

Unit is certified for application in seismicZone 4 under both the California BuildingCode, the Uniform Building Code andBOCA. Transfer Switches shipped tothose Zip Codes in the United States ofAmerica, and possessions, which arelocated in Zone 4 areas are automatically

certified, and are furnished with any spe-cial installation instructions to meet therequirements. Customers desiring seis-mic certification that are not in these pre-determined areas may request this optionon order entry.

45.

Load Sequencing After Transfer

Provides time sequenced contacts to startindividual loads following transfer to asource in order to step load the source,and minimize the effects of high startingcurrents.

General Description
http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/


15/30

January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

47. Closed Transition

C. Closed/In-phase Transition/Time DelayNeutral Load Sense. Closed Transition is afeature that will temporarily parallel twolive sources in a make-before-breakscheme when performing a transfer. This

achieves a transfer between sources withno power interruption. Both sources mustbe synchronized in frequency, phase, andvoltage before the transfer is initiated.

In-phase Transition is a feature that willallow a transfer between two live sourcesonly when the phase difference betweenthe two sources is near zero. This is anopen transition transfer that preventsinrush currents from exceeding normalstarting currents in the case where motorloads are being transferred.

Time Delay Load Voltage Decay utilizesthe load voltage measurements to senseback EMF that is generated when the

transfer switch is in the Neutral position.It provides a delay in transfer in either

direction if an unacceptable level issensed as established by a customer pro-grammed level. The transfer will not takeplace until the back EMF decays below theacceptable programmed level. This fea-ture has a separate setting of enabling ordisabling the operation. If disabled, the

transfer switch will not delay in the Neu-tral position and will transfer between thesources as fast as possible. This feature isnot available with the Time Delay NeutralOptional Feature 32A.

D. Closed Transition. Closed Transition is afeature that will temporarily parallel twolive sources in a make-before-breakscheme when performing a transfer. Thisachieves a transfer between sources withno power interruption. Both sources mustbe synchronized in frequency, phase, andvoltage before the transfer is initiated.

If the logic is forced into a fail safe mode(i.e., loss of connected source), the logic

will perform a load voltage decay opentransfer.

E. Closed/In-phase Transition/Time DelayNeutral. Closed Transition is a feature thwill temporarily parallel two live sourcesin a make-before-break scheme when peforming a transfer. This achieves a transfer between sources with no powerinterruption. Both sources must be syn-

chronized in frequency, phase, and volt-age before the transfer is initiated.

In-phase Transition is a feature that willallow a transfer between two live sourceonly when the phase difference betweenthe two sources is near zero. This is anopen transition transfer that preventsinrush currents from exceeding normalstarting currents in the case where motoloads are being transferred.

Time Delay Neutral provides a time delain the transfer switch neutral positionwhen both breakers are open. This delaytakes place when the load is transferred either direction to prevent excessive

inrush currents due to out-of-phaseswitching of large motor loads.

General Description
http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/


16/30

CAT.71.01.T.E

Cutler-HammerK1-16

January 1999

Transfer Switches

Coordinated Withstand, Closing and Interrupting Ratings for Cutler-Hammer Transfer Switch Equipment

Series Equipment Rating Symmetrical AmperesChart shows upstream breaker type that can be applied to attainrating. Size in accordance with the NEC.

With P12 Limiter. With P20 Limiter. With PR20 Limiter. Can coordinate with a Power Breaker short time rating for up to 30 cycles

(1200-3000A-50 kA)(4000A-85 kA).

Table 1: 208-240 Vac

TransferSwitchRating

65 kA 85 kA 100 kA 200 kA

30-100 FDJD

HFDHJD

FDCJDCKDC

150-300 JDKD

HJDHKDNB Tri-pac

FDCJDCKDC

400 KDLD

HKDHLDNB Tri-pac

600 HLCHMC

HLDNB Tri-pac

800-1000 HMC, PB-PHNCRD

1200-1600 DS SPB

1600-3000 DS1600-2000A

DS2500-3000A

SPB

4000 SPBDS

With P06 Limiter. With P10 Limiter.

With P12 Limiter. With PR20 Limiter. Can coordinate with a Power Breaker short time rating for up to 30 cycles

(1200-3000A-50 kA)(4000A-85 kA).

Table 2: 480 Vac


35 50 65 85 100 150 200

30-100 HFD

HJDHKD

FDC

JDCKDC

FCL

LCL

FB Tri-pac

150-300 HFDHJDHKD

FDCJDCKDC

FLCLCL

LA Tri-pac

400 KD/LD HMC HKD/HLD KDC/LDC

600 HLC HMC NB Tri-pac

800-1000 HNCRD

PB Tri-pac

1200-1600 DS SPBPC

PB Tri-pac

1600-3000 DS SPBPC

4000 DS SPB

Table 4: Wire Size Data for Power Cable Connections

For alternative lugs, please contact Cutler-Hammer. Standard wire size for 4-pole is 3/0-400 kcmil.

SwitchRating(Amps)

CablesPerPhase

Range ofWiring Size

Type ofConductor

30-100

150225-300400600800

100012001600-20002500-30004000

1

11223448

1216

#4-1/0

#4-4/0#3-350 kcmil250-350 kcmil#1-500 kcmil3/0-400 kcmil4/0-500 kcmil4/0-500 kcmil4/0-500 kcmil4/0-500 kcmil4/0-500 kcmil

Cu/Al

Cu/AlCu/AlCu/AlCu/AlCu/AlCu/AlCu/AlCu/AlCu/AlCu/Al

Technical Data

Table 3: UL 1008 Maximum Withstand, Closing and Interrupting

Ratings All Products

Tested in accordance with UL 1008. For maximum breaker rating in circuits where the transfer switch is evaluated

as a motor branch circuit conductor refer to the NEC Section 430-25 for sizing. 4-pole units are rated 35 kA. 100 kA @ 480V. 65 kAIC for mini-SPB. 100 kAIC for SPB with Option 17C. Cutler-Hammer Class L Fuse only for 5000A rating.

Rating When Used WithUpstream Circuit Breaker

Rating When Used WithUpstream Fuse

Transfer SwitchAmp Rating

240V(kA)

480V(kA)

600V(kA)

MaximumFuse Rating

FuseType

600V max.(kA)

3070

100150225300400600800

100012001600200025003000

4000

100100100100100100100

65656585

100100100100

100

6565656565656550505065

100100100100

100

252525252525252525258585858585

85

200200200400400400600800/1200

1200/1600160020003000300040004000

5000

J, T, RJ, T, RJ, T, RJ, T, RJ, T, RJ, T, RJ, TLLLLLLLL

L

200200200200200200200100/200100/200200200200200200200

200


17/30

January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

72.0

32.5

16.0

36.5

38.0

Front View

5.7 16.5

28.0

Side View

16.0

13.1

12.3

72.0

1.9Typ.

28.0

Side View withPanel Removed

EmergencyPower CableConnections

Load CableConnections

NormalPower CableConnections

Neutral CableConnectionand Grounding

18.00

28.00

2.50

2.50

CableEntry

Top View

Clear

Rear

38.00 2.50

2.50

Automatic and Manual/Non-Automatic Transfer SwitchesTypes ATVS, ATVI AutomaticTypes MTVX and NTVS Manual225-1000 Amperes

Breaker Type Power Panel Enclosure Conduit Area Bolt Pattern

Height(In.)

Width(In.)

Depth(In.)

Height(In.)

Width(In.)

Depth(In.)

Width(In.)

Depth(In.)

Bending(In.)

Horizontal(In.)

Vertical(In.)

A B C D E F G H

FD (30-150A)KD (225A)KD (300A)LD (400A)MA (600A)NB (800A)

NB (1000A)ND (800A)ND (1000A)

11.0024.5024.5026.0036.2536.25

36.2536.2536.25

17.0011.8811.8816.8816.8816.88

16.8816.8816.88

6.8117.517.517.517.519.0

19.019.019.0

444452617379

797979

212121262626

262626

18.1319.6319.6319.6320.6320.63

20.6320.6320.63

2188888

888

14.54.004.004.004.754.75

4.754.754.75

469

111215

151515

11.0011.0011.0016.0016.0016.00

16.0016.0016.00

42.8642.8650.8659.8671.8677.86

77.8677.8677.86

Device panel supplied to house required pilotcontrol devices (lights, selector switches, etc.).

Manual (except 100-150A, top of page) and nonautomatic switch enclosure dimensions sameas automatic.

Depth includes the interior handle extended. Enclosure depth includes the exterior (or door)

handle.

Logic Panel 38 in. H x 11 in. W x 6.5 in. DTransformer Panel 22 in. H x 16.5 in. W x 6.5 in. D (30-150A)

28.63 in. H x 8.25 in. W x 5.5 in. D (225-1000A)

Approximate Shipping

Weight (Lbs.)30-150A

225-300A400A600A800-1000A

210380430525610

Typical Front View Typical Side View

F

AH

CGB

Top of Lugs onPower Panel

D

E

ConduitArea

Typical Footprint View

PowerPanel

LogicPanel

TransformerPanel

Types ATHSFD, ATHIFD AutomaticType NTHSFD Non-Automatic30-150 Amperes

Automatic and Non-Automatic Transfer SwitchesType ATVISP Mini-SPB AutomaticType NTVSSP Mini-SPB Non-Automatic600-1200 Amperes

Layout Dimensions, Enclosed Units

Dimensions are in inches.

Transfer SwitchRating

Approximate ShippingWeight (Lbs.)

3-Pole, 600-1200A 850

4-Pole, 600-1200A 950


18/30

CAT.71.01.T.E

Cutler-HammerK1-18

January 1999

Transfer Switches

9.75 30.5

F

I

Vent Patterns

G

H

28.0 3P34.0 4P

26.5 3P32.5 4P

90.0

31.0

F

I

14.5

Neutral CableConnectionand Grounding(Right handside whenfacing frontof switch)

G

H

Normal PowerCable Connections


Emergency PowerCable Connections

48.0

12

90.0

Neutral CableConnectionand Grounding(Right handside whenfacing frontof switch)

Normal PowerCable Connections


Emergency PowerCable Connections

C

A

D

B

Clear

Front View Side View

Side ViewFront View

Door

2.38

Cable

2.38

Top View

HoodedVent Pattern(NEMA 3R)

24.0

60.0

50.0

Automatic and Non-Automatic Transfer SwitchesType ATVISP SPB AutomaticType NTVSSP SPB Non-Automatic1600-4000 Amperes (Fixed Mounted)800-4000 Amperes (Draw-out)

Maintenance Bypass SwitchesType MBVE1200-4000 Amperes (Fixed Mounted)



Dimensions andConduit Opening in Inches

WeightLbs.

A B C D

3-Pole800-1200

Fixed 28.00 50.00 23.50 22.00 1300

4-Pole800-1200

Fixed 34.00 50.00 29.50 22.00 1400

3-Pole2500-4000A

Fixed 40.00 60.00 43.25 22.00 1900

4-Pole2500-4000A

Fixed 48.00 60.00 43.25 22.00 2100


Dimensions in Inches

F G H I

2000A Fixed 71.00 54.50 38.00 29.54

3000A Fixed 67.00 47.00 27.00 36.09

4000A Fixed 69.12 45.12 21.12 33.16

800-1200 ampere supplied with Option 17C. Dimensions are in inches.

800-2000 amperes, 3- or 4-poles800-1200 only if Option 17C is selected

25004000 amperes, 3-poles25003000 amperes, 4-poles


19/30

January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

Bypass Isolation Automatic Transfer Switches

Type BIHI100-1000 Amperes

Enclosure Dimensions 100 Amperes

30.00 (Ref.)

28.50 (Ref.)

62.56

72.00(Ref.)

49.35

22.06

(OnPosition)

(OnPosition)

Side View(Cover Removed)

Front View

54.69

18.00(Ref.)

5.359.00(Ref.)

22.50 (Ref.)48.00 (Ref.)46.50 (Ref.)

5.75(Ref.)

14.0

73.0

57.7Max

34.00 (Ref.)Side View

(Covers Removed)

(NormalBypass

Position)

Front ViewNormal Bypass Position

22.06

ServiceEquipment

Label(If Req'd.)

90.0(Ref)

Enclosure Dimensions 150-1000 Amperes


A

B5.00

E

C

D

H

1.25F

G

1.75

2.00 (Latch Open)

.75 (Latch Closed)

Manual Transfer Switches

Type MTHXFD100-150 Amperes

A B C D E F G H

100-150 Amps 22.88 13.13 22.74 22.62 24.50 9.78 10.28 32.31

225-300 Amps 38.88 29.13 35.74 35.62 37.50 17.28 17.78 55.81

400 Amps 38.88 29.13 35.74 35.62 37.50 17.28 17.78 55.81

600 Amps 38.88 29.13 49.74 49.62 51.50 17.28 17.78 55.81

800 Amps 38.88 29.13 49.74 49.62 51.50 17.28 17.78 55.81

1000 Amps 38.88 29.13 59.74 59.62 61.50 17.28 17.78 55.81

Maintenance Bypass Switches

Type MBHE100-1000 Amperes
http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/http://ch_start.pdf/


20/30

CAT.71.01.T.E

Cutler-HammerK1-20

January 1999

Transfer Switches

Bypass Isolation Automatic Transfer SwitchesType BIVISP SPB Draw-out800-3000 Amperes

Dimensions and

ConduitOpeningin Inches

A B C CC

CableSpaceDepth

Weight

(Lbs.)

3-Pole, 800-2000A4-Pole, 800-2000A3-Pole, 2500-3000A4-Pole, 2500-3000A

60.0060.0060.0060.00

56.0068.0082.0082.00

23.2429.2436.2436.24

28.4428.4423.8423.84

3400400045004900

Depth in Inches

Rating A D

800-2000A2500-3000A

60.0060.00

30.0030.00

Note: Rear access required.

90.00

28.00 3-Pole34.00 4-Pole

56.00 3-Pole68.00 4-Pole

82.00

58.00

Normal Normal Bypass

Emergency Emergency Bypass

Normal Normal

Emergency Emergency

12.00

14.00 3-Pole17.00 4-Pole

800-2000 Amp 2500-3000 Amp

3.00

Front View

(Conduit Space)

CA

CC

2.38"

B

2.38"

Top or BottomView

Normal CableConnection

EmergencyCable

Load CableConnection

Neutral CableConnection & Grounding(Right Hand Side whenfacing front of switch)

2.38"D D

A

RearFront

Front

(Conduit Space)

C

Clear1

Clear1

Side View



21/30

January 1999

Cutler-HammerK1

CAT.71.01.T.E

Transfer Switches

RatingsA. The transfer switch shall have withstand,

closing and interrupting ratings of

______amperes.

B. The voltage rating of the transfer switchshall be no less than the system voltage

rating. The continuous current rating ofthe transfer switch shall be no less thanthe maximum continuous current require-ments of the system.

C. The transfer switch shall be 100% equip-ment rated for continuous duty as shownon the drawings and shall conform to theapplicable requirements of UL 1008 foremergency system total load.

D. All pilot devices and relays shall be of theindustrial type with self-cleaning contactsand rated 10 amperes.

E. The automatic transfer switches shall befully rated to protect all types of loads,

inductive and resistive, from loss of conti-nuity of power, without derating, eitheropen or enclosed. (Optional)

F. Transfer switches shall have a minimum60-cycle withstand rating of 51 kA. Thetransfer switch shall be rated for applica-tion with upstream power circuit breakersand insulated case circuit breakers havingshort-time delay settings of up to 30cycles. Contacts shall not weld when usedwith upstream overcurrent protectivedevices that do not incorporate instanta-neous trip units.

Construction

A. The transfer switches shall consist of com-

pletely enclosed contact assemblies and aseparate control logic panel. The contactassemblies shall be operated by a non-fused motor operator or stored energymechanism and be energized only momen-tarily during transfer, providing inherentlydouble throw switching action. Controlpower for all transfer operations shall bederived from the line side of the source towhich the load is being transferred.

B. Transfer switches shall be capable of beingoperated manually under full load condi-tions. Manual operation shall be accom-plished via a permanently affixed manualoperator or integrally mounted pushbuttonoperators located on the face of the contact

assemblies. Removable manual operatinghandles and handles which move in theevent that electrical operators should sud-denly become energized while performing amanual transfer operation are not accept-able. The manual operator shall provide thesame contact-to-contact transfer time asprovided under normal automatic operationto prevent possible flashovers from switch-ing the main contacts slowly. In addition,provisions shall be made to allow disen-gagement of the electrical operator duringmanual operation.

C. Each transfer switch shall be positivelyinterlocked both mechanically and electri-cally to prevent simultaneous closing ofboth sources under either automatic ormanual operation. Main contacts shall bemechanically locked in position in bothnormal and emergency positions. A neu-

tral position shall not be possible undernormal electrical operation unless adelayed transition accessory is requiredfor switching highly inductive loads. Eachtransfer switch shall have a manual neu-tral position for load circuit maintenance.A transfer switch position indicator shallbe visible from the front of the switch toshow to which source the transfer switchis connected.

D. All three-phase four-wire transferswitches used on systems with groundfault equipment shall be true four-poleswitched neutral type with all four polesfor each source being fully rated and con-nected to a common shaft. The fourth

(neutral) pole contacts shall be of identi-cal construction as, and operate simulta-neously with, the main power contacts.Add-on or overlapping neutral contactsare not acceptable.

E. An electronic sensing and control logicpanel shall be separately mounted fromthe power switching portion of the trans-fer switch. The two sections shall be con-nected by control cables with plug-inconnectors. The control section shall becapable of being disconnected from thepower section for maintenance purposes.

F. The logic circuit shall utilize electroniccomponents mounted on printed circuit

boards to accomplish functions such astiming, time delays, and voltage and fre-quency monitoring. LEDs shall be fur-nished to indicate the operation of eachsolid-state function. Modifications shallbe available for field installation withoutvoiding the UL label.

G. The transfer switch shall be equippedwith a voltage selection plug makingit suitable for operation on standard volt-ages from 208 through 600 volts ac, 50 or60 Hertz, by placing the voltage selectionplug in the proper voltage receptacle.

H. Where shown on the drawings, transferswitches applied as service entrance

switches shall be provided with overcur-rent trip units and a service entrance label.An external key-operated selector switchshall be provided to disconnect the powersupplies. Indicators shall be provided toshow the availability of each source as wellas breakers in a tripped or disconnectedposition. Provide a neutral disconnect linkfor three-pole solid neutral switches, and aneutral-to-ground main bonding jumperfor all switches to meet UL serviceentrance requirements. Ground fault pro-tection shall be provided for all switches

rated 1000 amperes or more applied

Documents

Cutler Hammer Spec Sheet