The equipment covered by this publication must be installed, operated, and main-tained by qualified persons who are knowledgeable in the installation, operation, andmaintenance of underground electric power distribution equipment along with theassociated hazards. A qualified person is one who is trained and competent in:
•
The skills and techniques necessary to distinguish exposed live parts from non-live parts of electrical equipment.
•
The skills and techniques necessary to determine the proper approach distancescorresponding to the voltages to which the qualified person will be exposed.
•
The proper use of the special precautionary techniques, personal protectiveequipment, insulating and shielding materials, and insulated tools for working onor near exposed energized parts of electrical equipment.
These instructions are intended only for such qualified persons. They are
not
intended to be a substitute for adequate training and experience in safety proce-dures for this type of equipment.
Qualified Persons
Read thisInstruction Sheet
Thoroughly and carefully read this instruction sheet before installing or operating yourS&C Vista Underground Distribution Switchgear. Familiarize yourself with “SAFETYINFORMATION” on pages 3 and 4.
Retain thisInstruction Sheet
This instruction sheet is a permanent part of your S&C Vista Underground Distribu-tion Switchgear. Designate a location where you can easily retrieve and refer to thispublication.
ProperApplication
Warranty
The standard warranty contained in S&C’s standard conditions of sale, as set forth inPrice Sheet 150, is applicable to the S&C Vista Underground Distribution Switchgearcovered in this instruction sheet.
Ç
CAUTION
The equipment in this publication must be selected for a specific application. Theapplication must be within the ratings furnished for the equipment. Ratings forthis gear are listed on a ratings label at the front of the switchgear.
3 681-505
Understanding Safety-AlertMessages
There are several types of safety-alert messages which may appear throughout thisinstruction sheet as well as on labels attached to the Vista switchgear. Familiarize your-self with these types of messages and the importance of the various signal words, asexplained below.
Following Safety Instructions
If you do not understand any portion of this instruction sheet and need assistance, con-tact your nearest S&C Sales Office or S&C Authorized Distributor, or call S&C Head-quarters at (773) 338-1000, Monday through Friday between 8:30 AM and 5:00 PMCentral Standard Time. (In Canada, call S&C Electric Canada Ltd. at (416) 249-9171.)
Replacement Instructions and Labels
If you need additional copies of this instruction sheet, contact your nearest S&C SalesOffice, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment bereplaced immediately. Replacement labels are available by contacting your nearestS&C Sales Office, S&C Authorized Distributor, S&C Headquarters, or S&C ElectricCanada Ltd.
Ç
DANGER
“DANGER” identifies the most serious and immediate hazards which
will likely
result in serious personal injury or death if instructions, including recommendedprecautions, are not followed.
Ç
WARNING
“WARNING” identifies hazards or unsafe practices which
can
result in serious per-sonal injury or death if instructions, including recommended precautions, are notfollowed.
Ç
CAUTION
“CAUTION” identifies hazards or unsafe practices which can result in minor personalinjury or product or property damage if instructions, including recommended precau-tions, are not followed.
Ç
NOTICE
“NOTICE” identifies important procedures or requirements that, if not followed, canresult in product or property damage if instructions are not followed.
Ç
NOTICE
SAFETY INFORMATION
Thoroughly and carefully read this in-struction sheet before installing yourS&C Vista Underground DistributionSwitchgear.
681-505 4
Reorder Information for Safety Labels
Location Safety-Alert Message Description Number
A Ç
WARNING
Keep Out—Hazardous Voltage Inside G-6681
B Ç
DANGER
Hazardous Voltage—Always Consider Circuits and Components Live . . . G-6700
C Ç
DANGER
Never Drill Into Tank—Hazardous Voltage, Contains Pressurized SF
6
Gas G-6682
D Ç
DANGER
Keep Away—Hazardous Voltage (“Mr. Ouch”) G-6699
E Ç
WARNING
Check Gas Pressure Before Operating Switchgear G-6686
F Ç
WARNING
Always Test Voltage Indicator For Proper Operation G-6689
G Ç
WARNING
Always Visually Confirm Blade PositionG-6693
G-6694 (Option “-L2”)
SAFETY INFORMATION
Location of Safety Labels
A
B
CD
G
E
Pad-Mounted Enclosure
F
Top of Switchgear
G
FE
DC
B
A
5 681-505
Packing
UnderCover and vault-mounted style switchgear are shipped in a wooden crate. Pad-mounted style switchgear (enclosure with separate tank) is fastened to a wood skid.The tank is shipped within the enclosure.
At the first opportunity, remove all packing materials (cardboard, paper, foam pad-ding, etc.) from the outside of the pad-mounted enclosure. This will prevent the finishfrom being damaged by rainwater absorbed by the packing materials and will also pre-vent wind-induced abrasion from loose cardboard.
Inspection
Examine the shipment for external evidence of damage as soon after receipt as possi-ble, preferably before removal from the carrier’s conveyance. Check the bill of lading tomake sure that all shipping skids, crates, and containers listed thereon are present.
If there is visible loss and/or damage:
1. Notify the delivering carrier immediately.2. Ask for a carrier inspection.3. Note condition of shipment on all copies of the delivery receipt.4. File a claim with the carrier.
If concealed damaged is discovered:
1. Notify the delivering carrier within 15 days of receipt of shipment.2. Ask for a carrier inspection.3. File a claim with the carrier.
Also notify S&C Electric Company in all instances of loss and/or damage.
INSPECTION AND HANDLING
681-505 6
Handling
1. Use 6-foot or longer hoist slings of equallength to prevent damaging the enclosureor tank during lifting. (Four-foot hoistslings are acceptable for two-way andthree-way enclosures and tanks.)
2. Arrange the hoist slings so as to distributethe lifting forces equally between the liftingtabs.
3. Avoid sudden starts and stops.
Ç WARNINGWhen handling an enclosure or tank with anoverhead hoist, observe standard liftingpractices as well as the general instructionsbelow. Failure to follow these precau-
tions can result in serious personal in-
jury or equipment damage.
INSPECTION AND HANDLING
UnderCover Style and Tank for Pad-Mounted Style
Vaulted-Mounted Style
Enclosure for Pad-Mounted Style
7 681-505
INSTALLATION — UnderCover and Vault-Mounted Styles
Switchgear Placement1. Remove the switchgear from its crate and
lift the gear into place, observing the pre-cautions given under “Handling” on page 6.
2. Secure the switchgear in place in accor-dance with the pull box or wall bracketsprovided by the user.
CablesRefer to “CABLE TERMINATIONS” on page 15.
Grounding1. Connect the cable concentric-neutral
ground wires to the grounding system asappropriate.
2. Connect the ground pad of the switchgearto the system ground facility in accor-dance with the user’s standard groundingpractice.
3. Use the equivalent of 4/0 copper (or cablesized in accordance with the user’sstandard practice) in either a single or mul-tiple connection to realize the maximummomentary rating of the switchgear. For amultiple connection, cables smaller than1/0 copper or equivalent should not beused.
Fault IndicatorsFault indicators are to be furnished by theuser and installed in accordance with themanufacturer’s instructions.
Switchgear is bolted to skid in four places for shipment
Switchgear ground pad
Shipping covers
Bushings shown with covers removedShipping covers
Ground in accordance with user’s standard grounding practice (grounding not shown)
681-505 8
Enclosure Removal1. Loosen the pentahead bolts securing the
hinged roofs to the enclosure using a penta-head socket wrench with extender or apentahead tool.
2. Lift the hinged roofs upward and securethem with the holders.
INSTALLATION — Pad-Mounted Style
Pentaheadwrench with extender
Upperfrontpanel(notshown)
Holder
Hinged roofs
Operation compartment
Termination compartment
Front panel
9 681-505
3. Remove the front panel from the operationcompartment and the upper front panelfrom the termination compartment by loos-ening the fasteners securing the panels inplace and lifting the panels upward. Set thepanels aside in a safe, clean place.
4. Unbolt the enclosure from the skid andremove it from the tank, observing theprecautions given under “Handling” onpage 6. Set the enclosure aside in a pro-tected area.
INSTALLATION — Pad-Mounted Style
Front panelremoved
Upper front panel removed (not shown)
Operation compartment
Terminationcompartment
Removingenclosurefrom tank
681-505 10
INSTALLATION — Pad-Mounted StyleTank Placement1. Unbolt the tank from the skid and lift it
above the mounting pad, observing theprecautions given under “Handling” onpage 6. Verify that the tank is positionedcorrectly with respect to the cables andanchor bolts.
2. Lower the tank into place.
3. Secure the tank to the pad using the anchorbrackets provided.
CablesRefer to “CABLE TERMINATIONS” on page 15.
Enclosure Placement
1. Lift the enclosure into place over the tank,observing the precautions given under“Handling” on page 6.
Ç CAUTIONWhen installing the pad-mounted enclo-sure over the tank, place the side of theenclosure with the “Termination Compart-ment” label over the terminators and theside of the enclosure with the “OperationCompartment” label over the operatingmechanisms. This will ensure that thecompartments are properly identified andthe panels are in their correct locations.
Tank is bolted to skid in four places for shipment
Bushings shown with covers removed Shipping coversShipping
covers
Lowering enclosure over tank
11 681-505
INSTALLATION — Pad-Mounted Style2. Refer to the catalog dimensional drawing
furnished and verify that the enclosurecompartments are positioned correctly andthat the enclosure is properly aligned withrespect to the anchor bolts.
3. Secure the enclosure to the pad using theanchor brackets provided.
Grounding1. Connect the cable concentric-neutral
ground wires to the grounding system asappropriate.
2. Connect the ground pad of the tank and theground pad inside the enclosure to thesystem ground facility in accordance withthe user’s standard grounding practice.
Tank ground pad
Gasket
Concrete pad
Enclosure
1.5� min.
(4) .625� dia. anchor bolts by user
Anchor bracketby S&C
Ground in accordance with user’s standard grounding practice (grounding not shown)
681-505 12
INSTALLATION — Pad-Mounted Style3. Use the equivalent of 4/0 copper (or cable
sized in accordance with the user’s stan-dard practice) in either a single or multipleconnection to realize the maximummomentary rating of the switchgear. For amultiple connection, cables smaller than1/0 copper or equivalent should not beused.
Fault IndicatorsFault indicators are to be furnished by theuser and installed in accordance with the man-ufacturer’s instructions. Optional mountingprovisions for fault indicators (CatalogNumber Suffix “-F1” or “-F2”) are available forpad-mounted style switchgear. If mountingprovisions are specified, mount the fault indi-cators on the mounting brackets and attachthe associated sensors to the cables below thecable terminations.
Enclosureground pad
13 681-505
INSTALLATION — Pad-Mounted StyleCompleting the Installation1. A resilient closed-cell gasket on the bottom
flange of the enclosure protects the finishfrom being scratched during installationand isolates it from the alkalinity of a con-crete foundation. This gasket also helps toseal the enclosure to the foundation toguard against entry of rodents, insects, orweeds, and to discourage tampering.
In the event the gasket cannot compen-sate for an uneven foundation, grout thebottom of the enclosure as necessary. Anygrout applied should be recessed enough topermit caulking. To complete the installa-tion, caulk around the bottom of theenclosure; a weatherproof temperature vul-canizing (RTV) silicon-rubber compound isrecommended. Apply a suitable compoundto fill the spaces between the cable and theconduit, and cap all empty conduits to pre-vent the entry of moisture and rodents.
2. Reinstall the front panel of the operationcompartment and the upper front panel ofthe termination compartment. (Note thatthese panels are not interchangeable.)Lower the hinged roofs and secure themwith the pentahead bolts. Then insert apadlock into each hasp.
Bottom ofenclosure
Upperfrontpanel(notshown)
Terminationcompartment
Padlock
RTV silicon-rubber caulk
Operation compartment Front panel
681-505 14
INSTALLATION — Pad-Mounted Style3. Wipe down the exterior of the enclosure
with a clean, damp cloth. Refinish anyscratches or abrasions with S&C touch-upfinish and red-oxide primer which are avail-able in aerosol spray cans. Order CatalogNumber 9999-058 for olive green finish,9999-080 for light gray finish, and 9999-061for red-oxide primer. No other finish orprimer is approved. The area to be touchedup should be cleaned to remove all oil andgrease. Sand the area, removing any tracesof rust that may be present, and make surethat all edges are feathered before applyingprimer.
Red-oxide primer
Touch-up finish
15 681-505
1. Remove the shipping covers from the bush-ings and bushing wells.
Ç DANGERBefore energizing the switchgear, replacethe shipping caps on all bushings and bush-ing wells with elbows or insulated protec-tive covers or plugs. Failure to replace
the shipping caps with elbows or insu-
lated protective covers or plugs can re-
sult in a flashover and serious personal
injury or death.
Ç CAUTIONALWAYS follow proper cable installationpractices. When installing cable to beattached to the switchgear, provide a strain-relief segment to minimize the load on thebushings. Cables must be allowed to ex-pand and flex without putting a significantload on the bushings. For a pit, either loopthe cable in the pit or bring it into the pithorizontally and up to the gear at a 90ºangle. Failure to follow these precau-
tions can result in damage to the bush-
ings and bushing wells and subsequent
leakage of the SF6 insulating gas.
CABLE TERMINATIONS
Yellow shipping covers are provided for bushing wells
Shipping covers removed
Fault-interrupterand load-interrupter switch terminals are equippedwith 200-ampere bushing wells or 600-ampere bushing as specified
Black shipping covers are provided for bushings
Elbows and inserts are supplied by user
Bushing and bushing well interfaces conform to ANSI/IEEE Standard 386 to accept standard elbows and inserts
2. Terminate the cables with the elbowsfollowing the elbow manufacturer’s instruc-tions.
681-505 16
DIELECTRIC TESTING
Ç WARNINGWhen performing electrical withstand tests on Vista switchgear, al-ways observe the following precautions. Failure to observe
these precautions can result in a flashover, injury, and equip-
ment damage.
1. Completely de-energize the switchgear and disconnect it fromall power sources.
2. Terminate bushings with an insulated cap or other appropriatecable termination capable of withstanding the test voltage.
3. Verify that the SF6 pressure gauge is in the green zone.
MAXIMUM INSULATION TEST VOLTAGES
Vista Switchgear Rating, kV Withstand Test Voltage, kV
50 Hertz 60 Hertz Impulse (BIL) Power Frequency1 Dc23
12 15.5 95 27 42
24 27 125 40 62
36 38 150 50 82
1 The power-frequency withstand test voltages listed in the table areapproximately 80% of the design values for new equipment.2 The dc withstand test voltages listed in the table are approximately80% of the design values for new equipment.3 Dc withstand test voltages are given for reference only for those usersperforming dc withstand tests. The presence of these values does not
imply a dc withstand rating or performance requirements for the switch-gear. A dc withstand design test is specified for new equipment becausethe switchgear may be subjected to dc test voltage when connected to thecable. The dc withstand test values listed in the table are approximatelyequal to the ac peak test voltage.
Routine Switchgear Testing
For the convenience of users who normallyperform electrical tests on system compo-nents such as switchgear, appropriate with-stand test values for Vista switchgear aregiven in the table below. These test values aresignificantly greater than the normal operatingvoltage of the switchgear and are near theflashover voltage of the gear. They should beapplied only when the switchgear is com-pletely de-energized and disconnected fromall power sources.
Cable Testing and FaultLocatingDc testing of installed cables is performed todetermine the condition of the cables and tolocate faults. Industry standards, like IEEE400, “IEEE Guide for Making High-Direct-Volt-age Tests on Power Cable Systems in theField,” describe such testing and should bereferenced for selection of the test proce-dures. Dc testing also includes cable “thump-ing,” i.e., the sudden application of dc voltagefrom a large capacitor for the purposes offault locating, which causes transients andvoltage doubling at the end of the open cable.When the cables are attached to the switch-gear, the gear will also be subjected to the dctest voltages.
Ç WARNINGThe dc withstand capability of the switchgear may be reduced dueto aging, damage, gas leakage, or electrical or mechanical wear.Therefore, the dc test voltage must be selected such that it does notexceed the withstand limits of the switchgear. Application of dc
test voltages greater than the withstand capability of the
switchgear can result in a flashover, injury, and equipment
damage.
In addition, always verify that the SF6 pressure gauge is in thegreen zone before proceeding with any testing.
Ç DANGERDo not exceed the test voltages given in the table on page 17.Exceeding the test voltages can cause a flashover of the isolatinggap or phase-to-phase insulation of the switchgear. This can lead
to a power-frequency fault in the gear or of the dc test source
and result in severe personal injury or death.
17 681-505
Vista switchgear has been designed to allowdc testing of the cables with the other ways ofthe gear energized. The integral groundingswitch may be used to ground the cable. Aftertesting, the dc test equipment should be usedto discharge any stored charge on the cablebefore grounding with the grounding switch.The dc test voltages and dc cable thumpingvoltages should not exceed the voltages givenin the table below.
MAXIMUM CABLE TEST AND CABLE THUMPING VOLTAGES
Vista Switchgear Rating, kVDc Cable Test Voltage, kV Dc Cable Thumping
Voltage, kV150 Hertz 60 Hertz Impulse (BIL)
12 15.5 95 30 15
24 27 125 40 20
36 38 150 40 20
1 The dc cable thumping voltage is 50% of the dc cable test voltagebecause of voltage doubling that will occur at the open end of the cablewhich is assumed to be a unit of Vista switchgear. If the open end of the
cable is grounded, the dc cable thumping voltage applied to the cable andswitchgear can be increased to the dc cable test voltage.
Fault-Interrupter TestingWhen performing dielectrical tests on Vistaswitchgear, the vacuum fault interrupters willnot be subject to voltage across the open gapbecause the disconnect switch will isolate thevacuum interrupter from the test voltage.Since the vacuum interrupter will not be ener-gized across the open gap, there is no expo-sure to X-rays that are normally associatedwith high-voltage testing of vacuum devices.Routine testing of the vacuum fault interrupt-ers is not recommended. For those users whodesire to test the vacuum interrupters, contactthe nearest S&C Sales Office for specificinstructions.
DIELECTRIC TESTING
Ç WARNINGWhen it is necessary to test the cables connected to a unit of ener-gized switchgear, proper isolation of the power-frequency sourcefrom the dc test source must be maintained. Follow the recommen-dations by the manufacturer of the dc test equipment or fault-locat-ing equipment. The user’s operating and safety procedures shouldbe followed for grounding the cable, connecting the dc test source,isolating the dc test source (in case of flashover), ungrounding thecable, applying the dc test source, discharging the cable, andregrounding the cable.
681-505 18
SPECIFICATIONS
ApplicableStandard
Amperes, RMS
Frequency,Hertz
Fault Interrupter Load-Interrupter Switch
Short-Circuit, Sym.
Continuous, Load Dropping,
and Load Splitting (Parallel or Loop
Switching)45
Fault- Closing,
Sym.
Fault-Interrupting,
Sym.
Continuous, Load Dropping,
and Load Splitting (Parallel or Loop
Switching)45
Fault- Closing,
Sym.
Momentary, Sym.
1 Sec., Sym.
IEC 50 or 60200 or 630 12 500d 12 500 200 or 630 12 500d 12 500 12 500 12 500
1 Refer to the nearest S&C Sales Office for other ratings.
2 IEC ratings have been assigned in accordance with the applicableportions of IEC 265-1 for a Class A switch.
3 ANSI ratings have been assigned in accordance with the applicableportions of ANSI C37.71, C37.72, and C37.73.
4 Fault interrupters and load-interrupter switches are rated 600amperes (630 amperes IEC) continuous, load dropping, and loop split-ting when furnished with 600-ampere bushings (standard for load-inter-rupter switches and 25-kA fault interrupters, optional for 12.5-kA faultinterrupters). The rating is limited to 200 amperes if 200-ampere bush-
ing wells are used (standard for 12.5-kA fault interrupters, optional for12.5-kA load-interrupter switches). Models rated 25-kA are only avail-able with 600-ampere bushings.
5 Fault interrupters and load-interrupter switches can switch themagnetizing current of transformers associated with the load-droppingrating. In addition, unloaded cable switching ratings are as follows: 10amperes at 15.5 kV and 20 amperes at 29 kV and 38 kV.
d 32,500 amperes peak.
h 65,000 amperes peak.
VISTA SWITCHGEAR RATINGS12
Rating, kV
System ClassMax BIL
IEC ANSI
12
24
36
15.5
27
38
15.5
29
38
95
125
150
1 IEC ratings have been tested in accordance with the applicableportions of IEC 265-1 for a Class A switch.2 ANSI ratings have been tested in accordance with the applicableportions of ANSI C37.71, C37.72, and C37.73.
19 681-505
SPECIFICATIONS
SINGLE-POLE OR THREE-POLE FAULT-INTERRUPTING—For 12.5-kA-rated models123
Item
Suffix tobe Added
to Switchgear Catalog Number
Applicable to
Single-Pole Manual Fault Interrupters on all fault interrupting ways -T012.5-kA-rated models with1 or more fault interrupters
Three-Pole Manual Fault Interrupter on one fault interrupting way (single-pole manual fault interrupters on all other fault interrupting ways) -T1
12.5-kA-rated models with1 or more fault interrupters
Three-Pole Manual Fault Interrupter on two fault interrupting ways (single-pole manual fault interrupters on all other fault interrupting ways) -T2
12.5-kA-rated models with2 or more fault interrupters
Three-Pole Manual Fault Interrupter on three fault interrupting ways (single-pole manual fault interrupt-ers on all other fault interrupting ways) -T3
12.5-kA-rated models with3 or more fault interrupters
Three-Pole Manual Fault Interrupter on four fault interrupting ways (single-pole manual fault interrupt-ers on all other fault interrupting ways) -T4
12.5-kA-rated models with4 or more fault interrupters
Three-Pole Manual Fault Interrupter on five fault interrupting ways (single-pole manual fault interrupters on all other fault interrupting ways) -T5
12.5-kA-rated models with5 or more fault interrupters
Three-Pole Manual Fault Interrupter on six fault interrupting ways -T612.5-kA-rated models with6 fault interrupters
1 Not applicable to models rated 25 kA short circuit. All 25-kA-ratedmodels include three-pole fault interrupters only.
2 Refer to the nearest S&C Sales Office for other possible configura-tions.
3 For standard models, components are in the following order (fromleft to right) when facing the operating side of the gear: load switches,bus taps, three-pole fault interrupters, single-pole fault interrupters.
SWITCHGEAR STYLE (to accommodate the installation)
Item
Suffix tobe Added
to Switchgear Catalog Number
Applicable toModels
UnderCover Style. Includes stainless-steel tank and submersible wiring and control housings -U All models
Dry-Vault-Mounted Style. Includes mild-steel tank. Does not include submersible wiring and control housings -V3 All models
Wet-Vault-Mounted Style. Includes stainless-steel tank and submersible wiring and control housings -V4 All models
Pad-Mounted Style. Includes mild-steel tank and mild-steel or stainless-steel pad-mounted enclosure for mount-ing switchgear on a pad. Does not include submersible wiring and control housings
Two-way unit
Mild-steelouter enclosure
Olive green finish -P2 201, 210, 211
Light gray finish -P7 201, 210, 211
Stainless-steelouter enclosure
Olive green finish -P12 201, 210, 211
Light gray finish -P17 201, 210, 211
Three- orfour-way unit
Mild-steelouter enclosure
Olive green finish -P4320, 321, 330, 413, 422, 431, 440
Stainless-Steel Tank (applicable only for units with suffixes “-V” or “-P2” through“-P21”) -S All models
Mounting Provisions for a Fault Indicator for Each Load-Interrupter Switch (applicable only for units with suffixes “-P2” through “-P21”)
NOTE: Accommodates three-phase indicator with single-phase sensors
Without viewing window inpad-mounted enclosure -F1 All models except Model 201
With viewing window inpad-mounted enclosure -F2f All models except Model 201
Potential Indication with Test Feature. Includes LCD display to indicate presence of voltage on each phase, and solar panel to supply power for testing of complete voltage-indication circuit and phasing circuit (if furnished). One potential indica-tor is provided for each bus-terminal, load-inter-rupter switch, and fault-interrupter way
Without provisions for low-voltage phasing -L1 All models
With provisions for low-voltagephasing -L2 All models
600-Ampere Bushings Without Studs, at load-interrupter switch and bus terminals for12.5-kA-rated models, and at all terminals for 25-kA-rated models -M1 All models except 12.5-kA-rated
Model 201
600-Ampere Bushings in Lieu of 200-Ampere Bushing Wells, at fault-interrupter and bus termi-nals
Without studs -M2d All 12.5-kA-rated models exceptModel 210, 320, 330, and 440With studs -M3d
200-Ampere Bushing Wells in Lieu of 600-Ampere Bushings, at load-interrupter switch and bus terminals1
-M4d All 12.5-kA-rated models exceptModel 201
1 Except for the Model 201, all bus terminals are normally equippedwith 600-ampere bushings.
f When ordering optional feature “-F2” for use with a stainless-steelpad-mounted enclosure, specify suffix “-F12” instead of “-F2.”
d Not applicable to models rated 25 kA short circuit. 25-kA models arealways furnished with 600-ampere bushings.
SPECIFICATIONS
21 681-505
SPECIFICATIONS
OPTIONAL FEATURES—Continued
Item
Suffix tobe Added
to Switchgear Catalog Number
Applicable to Models
Arc Resistance for Vault-Mounted Style Vista (arc resistance is standard for pad-mounted and UnderCover styles), per IEC 298 Appendix AA, for arcs occurring internal to the Vista tank(15 cycles, 12 kA symmetrical)
-N All models with option suffix “-V3” or “-V4”
Two-Hole Ground Pad, one per way, located below bushings or bushing wells (in lieu of standard one ground pad per tank) -O All models
Remote Low-Pressure Alarm1— includes inter-nal contact for remote low-pressure indication, with wiring to outside of tank
With wires routed on tank for futurecustomer connections
-R11 For Pad-Mounted and Dry-Vault-Mounted installation styles
-R12 For UnderCover and Wet-Vault-Mounted installation styles
With wires terminated in an enclosure that is furnished with a terminal block for customer connections
-R2 Only available for Pad-Mounted and Dry-Vault-Mounted Style units
External Trip Provisions, allows three-poletripping of single-pole or three-pole faultinterrupters via a trip signal from a remote location or an external relay. Requires 120-Vac control power23
In addition to standard overcurrent control for all fault interrupters
-R31 For Pad-Mounted and Dry-Vault-Mounted installation styles
-R32 For UnderCover and Wet-Vault-Mounted installation styles
In lieu of standard overcurrent control and current transformers for all fault interrupters
-R41 For Pad-Mounted and Dry-Vault-Mounted installation styles
-R42 For UnderCover and Wet-Vault-Mounted installation styles
Key Interlock on Load-Interrupter Switch or Three-Pole45 Fault Interrupter. Include one of each ofthe following options to specify a key interlock (one per way maximum), on
Way 1 -X1Any unit for which Way 1 is a load-interrupter switch or three-pole fault interrupter
Way 2 -X2Any unit for which Way 2 is a load-interrupter switch or three-pole fault interrupter
Way 3 -X3Any unit for which Way 3 is a load-interrupter switch or three-pole fault interrupter
Way 4 -X4Any unit for which Way 4 is a load-interrupter switch or three-pole fault interrupter
Way 5 -X5Any unit for which Way 5 is a load-interrupter switch or three-pole fault interrupter
Way 6 -X6Any unit for which Way 6 is a load-interrupter switch or three-pole fault interrupter
Copper Bus -Z5 All models
1 This option must be specified if future remote supervisory features,including remote low-pressure indication, are planned.
2 Refer to the nearest S&C Sales Office if compatibility with controlpower other than 120 Vac is required.
3 The user-supplied trip-initiating signal must be a momentary contact.Refer to the nearest S&C Sales Office if an application requires the use ofa latching contact.
4 Where key interlocks are to be applied on fault interrupters, specifyoptions “-T1” through “-T6,” as applicable.
5 Motor operators can not be retrofitted onto ways with key interlocks.
681-505 22
SPECIFICATIONS
TOUCH-UP KIT COMPONENTS—Aerosol Coatings1
1 In 9-ounce cans.
Item Catalog Number
S&C Light Gray Outdoor Finish 9999-080
S&C Olive Green (Munsell 7GY3.29/1.5) Outdoor Finish 9999-058
S&C Red-Oxide Primer 9999-061
ACCESSORIES
Item Catalog Number
Shotgun Clamp Sticks for use with separable connectors6�-5¹⁄₂� length 9933-150
8�-5¹⁄₂� length 9933-151
Storage Bag for Shotgun Clamp Stick, heavy canvas6�-6� length 9933-152
8�-6� length 9933-153
Overcurrent-Control Adapter Cable1
For connecting control to user-furnished personal computer in the field
For personal computers having 25-pin serial communication port TA-2366
For personal computers having 9-pin serial communication port TA-2367
For connecting control (removed from its enclosure) to user-furnished personalcomputer in the shop
For personal computers having 25-pin serial communication port TA-2368
For personal computers having 9-pin serial communication port TA-2369
Portable Motor Operator for operation of load-interrupter switches or single- or three-pole fault interrupters from a remote location. Includes carrying case, 50-foot cable with remote controls, and power supplied by
