S&C Circuit-Switchers - Mark V Integer Style Outdoor Transmission 34.5 kv through 69 kv I

INSTRUCTIONS For Field Assembly and Installation

[TABLE OF CONTENTS I

Section Page Number Section Page Number INTRODUCTION ........................................ 1 INSTALLATION ......................................... 7 BEFORE STARTING INSTALLATION ...................... . 5 FINA1,CHECKS ........................................ 10

1 INTRODUCTION I

1 0

The equipment covered by this publication must be selected for a specific application and it must be installed, operated, and maintained by qualified persons who are thoroughly trained and who understand any hazards that may be involved. This publication is written only for such qualified persons and is not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment.

General The following instructions are for field assembly (erec- tion) and installation of S&C Mark V Integer Style Circuit-Switchers. See Figure 1.

The S&C Mark V Circuit-Switcher employs an in-series circuit-breaking interrupter and a circuit-making and isolating disconnect, making it especially suited for switching and protection of transformers, lines, cables, capacitor banks, and line-connected or tertiary- connected shunt reactors. The Mark V Circuit-Switcher is suitable for frequent operation over a long period of time with minimal maintenance; is capable of closing, carrying, and interrupting fault currents as well as load currents; and utilizes interrupters economically tailored for specific applications by employing the precise number of interrupting gaps required. These interrupters are unaffected if subjected to sustained system voltage for extended periods, as a result of being left open with the disconnect blades closed for any reason.

Each pole-unit of the S&C Mark V Circuit-Switcher includes a brain which provides built-in positive sequence control . . . and a fully enclosed stored-energy source dedicated solely to operation of the interrupter which is in the circuit at all times. Close-and-trip

mechanisms are fully enclosed and protected, too. There are no external linkages, lever arms, cams, shunts, etc. that must be coordinated with a disconnect blade to accomplish circuit interruption. Positively sequenced operation is assured regardless of severe weather conditions such as high winds, rain, sleet, or snow.

The fault-closing contacts utilized on Integer Style Mark V Circuit-Switchers consist of a rugged stainless- steel tongue contact and a reverse-loop jaw contact of tinned, tempered silicon bronze. This contact arrangement assures long operating life and contrib- utes to Integer Style Mark V Circuit-Switcher’s high fault-closing capability. Dissimilar metals prevent contact welding.

The current-carrying contacts utilized on Integer Style Mark V Circuit-Switchers consist of a multifinger, spring-loaded, silver-inlaid, tinned hard-drawn copper, reverse-loop jaw contact that grips hard (but only when needed during short-circuit current surges) against a silver-inlaid, high-conductivity cast copper tongue contact. Confining all arcing to the fault-closing contacts, plus the built-in blade-wiping action, assures clean current-carrying contacts, low-resistance current path.

Mark V Circuit-Switcher features a base-integrated power train with drive-shaft mechanism that efficiently transmits and controls energy at high operating speed . . . and permanently maintains close interphase simultaneity. The drive train utilizes 186-degree vertical-shaft rotation to provide full toggle action at both ends of closing and opening strokes for smooth, shock-free acceleration and deceleration. Peak mechan- ical advantage is developed at stroke ends for power opening and closing without hesitation under %-inch ice Sormation, as discussed on page 2 under “Power Operation.”

Supersedes lnstructlon Sheet 711-500 dated 3-17-86 ‘1991

INSTRUCTION SHEET 7 1 1 -500 S&C ELECTRIC COMPANY Chicago Page 1 of 12 S&C ELECTRIC CANADA LTD. Toronto December 16,1991

S&C Circuit-Switchers - Mark VI

integer StyleOutdoor Transmission 34.5 kv through 69 kv

INTRODUCTION - Continued

Power Operation amperes rms three-phase symmetrical, 76,500 amperesHigh-speed, high-torque power operation of S&C peak (see “Basis of Fault-Closing Ratings” on page 3).Mark V Integer Style Circuit-Switchers is required to Power operation of Mark V Integer Style Circuit-provide a two-time duty-cycle fault-closing rating of 30,000 Switchers also provides opening and closing without

S&C SwitchType CS-IA

S&C Mounting Pedestal

Operator-

Conduit for shunt-trip device --&J-z ‘#%a *

Figure 1. S&C Mark V Three-Pole Integer Style Circuit-Switcher rated 69 kv nominal, 1200 amperes continuous, equippedwith S&C Shunt-Trip Device.

71 l-500 INSTRUCTION SHEETPage 2 of 12 S&C ELECTRIC COMPANY l ChicagoDecember 16,199l S&C ELECTRIC CANADA LTD. l Toronto

I INTRODUCTION - Continued I hesitation under %-inch ice formation; close interphase simultaneity; long life of fault-closing contacts under normal operating duties; and avoidance of excessive switching transients due to prolonged or unstable prestrike arcing. Mark V Circuit-Switchers are provided with high-speed, high-torque power operation by means of S&C Switch Operators--Type CS-1A.

High-speed tripping of power-operated Mark V Circuit-Switchers is furnished by the S&C Shunt-Trip Device. This optional accessory (Circuit-Switcher Catalog Number Suffix “-T1” or “-T2”) provides high- speed (8-cycle) circuit interruption. The S&C Switch Operator-Type CS-1A is required if the shunt-trip device is specified.

Basis of Fault-Closing Ratings The two-time duty-cycle fault-closing rating set forth above applies to Integer Style Mark V Circuit-Switchers when powered by S&C Switch Operators--Type CS-lA, and is based on performance as follows:

The Circuit-Switcher is capable of two fault-closing operations consisting of closing against and carrying for three seconds its rated fault-closing current, after which it can carry and interrupt its rated continuous current and is capable of power operation-either opening or closing. After each occasion consisting of either one or two fault-closing operations at its rated fault-closing current, the Circuit-Switcher must be inspected and any necessary repair or replacement of the fault- closing contacts made to restore the device to its original condition.

Manual Operation S&C Mark V Integer Style Circuit-Switchers may be manually operated by means of an S&C Manual Geared Operating Handle. Manually operated Circuit- Switchers, however, do not provide the performance features obtainable with power-operated Circuit- Switchers as described under “Power Operation,” such as fault-closing ratings and opening and closing under ice formation-nor can they be furnished with the shunt-trip device. Also, for manually operated Mark V Circuit-Switchers, the degree of simultaneity of opening and closing of the three pole-units depends on the proper installation and adjustment of the operating mechanism-as well as on the speed of cranking at the operating handle-and must be considered in establishing ground-relay settings.

Mounting of Circuit-Switchers The high operating speed which makes possible many of the Mark V Circuit-Switcher’s superior performance features when power operated brings about high acceleration and deceleration rates, resulting in high dynamic forces-for which S&C Mounting Pedestals were specifically designed, and are thus highly recommended. Alternately, Circuit-Switchers can be installed on the user’s steel pedestals or supporting structures-which must meet specific static and dynamic deflection limits shown in S&C data sheets, so that the dynamic forces will be absorbed by the pedestals and not transferred to adjoining bus or other apparatus (e.g., bushings).

Use of flexible-conductor connections at Circuit- Switcher’s terminal pads will compensate for inherent

INSTRUCTION SHEET 7 1 1 400 S&C ELECTRIC COMPANY Chicago Page 3 of 12 S&C ELECTRIC CANADA LTD. Toronto December 16,1991

S&C Circuit-Switchers - Mark V Integer Style Outdoor Transmission I 34.5 kv through 69 kv

1 INTRODUCTION - Continued I

insulator-column deflection. The weight of the bus plus any associated ice load exerts a vertical force on the Circuit-Switcher terminal pads. This vertical force must not exceed 400 pounds on either terminal pad.

Seismic Withstand Capability S&C Mark V Circuit-Switchers, when installed with the recommended S&C Mounting Pedestals and anchor bolts, are capable of withstanding seismic loading of 0.2 ground acceleration in any direction, as well as performing as intended during such loading and afterward. Higher seismic withstand capabilities can be furnished on special application.

Inspection Schedule and Procedures To assure Circuit-Switcher's continued proper perform- ance, it should be inspected in accordance with S&C's recommended schedule and procedures contained in S&C Instruction Sheet 711-590.

Should the user wish to perform elective exercising of the complete Circuit-Switcher installation-includ- ing the shunt-trip device, when this option is fur- nished-it may be accomplished without the need for opening the high-voltage circuit, by equipping the Circuit-Switcher with the optional stick-operated bypass accessory (Circuit-Switcher Catalog Number Suffix "-Bl"). Even if the bypass accessory has not been furnished, the Type CS-1A Switch Operator may be conveniently decoupled from the Circuit-Switcher, thereby permitting elective exercising of the operator at any time without requiring an outage or switching to an alternate source; when the switch operator is in the decoupled position, the shunt-trip device-when this option is furnished-is rendered inoperative, thereby permitting checkout of the system protective scheme.

7 1 1 400 INSTRUCTION SHEET Page 4 of 12 S&C ELECTRIC COMPANY 0 Chicago December 16,1991 S&C ELECTRIC CANADA LTD. 0 Toronto

BEFORE STARTING INSTALLATION

Checking the ShipmentAn S&C erection drawing will be found in a water-resistant envelope attached to the interrupter con-tainer on one of the three Circuit-Switcher pole-units.Study the erection drawing carefully and check the biUof material to be sure all parts are at hand.

The Circuit-Switcher shipment should include the fol-lowing items, as shown in Figure 2:1. The three single-pole upright units, on a mounting-

frame weldment, with an integrated single-offsetpower train providing rigid torsional interphasecoupling-all factory-installed and adjusted, as wellas the S&C Shunt-Trip Device (if specified) and itsassociated conduit and control wiring.

2. A crate which contains couplings for the verticalshaft, mounting hardware, grounding strap, andgrounding-strap connector.

I

3. The vertical operating-shaft section(s) bundled andstrapped to the mounting-frame weldment. Theseoperating-shaft sections are cut to length if specified.Otherwise, the correct number of operating-shaftsections are shipped for field cutting in accordancewith the dimensions specified on the erectiondrawing.

4. An S&C Mounting Pedestal (if specified) consistingof a single rectangular tubular column of formedsteel plate construction.

5. An S&C Switch Operator-Type CS-1A (as specified).6. Any accessories specified, such as grounding switch,

pre-insertion inductors, bypass accessory, or manualgeared operating handle.

J!w-contact assembly Disconnect blade\ Brace

I Instructions and registrationcard in water-resistant envelope

\

Interrupter target

Switch operator

x* Interrupter

/v-

\\

Lifting eyebolt (4) \Rotating-

Shunt-trip solenoid Miscellaneous insulator leverhousing parts crate open stop

\

insulated.operating shaft

weldment

dotating insulator

Figure 2. S&C Circuit-Switcher-Mark V, Three-Pole Integer Style, 69-kv nominal, including S&C Switch Operator-TypeCS-lA, as arranged for shipping.

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INSTRUCTION SHEET 7 llm500Page5of 12

December 16,199l

S&C Circuit-Switchers - Mark V Integer Style Outdoor Transmission 34.5 kv through 69 kv

1 BEFORE STARTING INSTALLATION - Continued I I

Interrupter Target Circuit-Switchers are usually shipped with the inter- rupters in the open position. Therefore, the interrupter target, located on the side of each brain housing (see Figure 3), will appear yellow. During the step-by-step instructions which follow, the disconnect blades will be moved to the fully open position. This will close the interrupter and charge and latch the stored-energy source within the brain, and the target will appear gray (normal).

When in service, Circuit-Switcher interrupters should never be open when the blades are in the closed position. To close the interrupters, Circuit- Switcher must be completely opened and then reclosed.

Gas-Pressure Indicator Circuit-Switchers have sealed interrupters containing gas under pressure. Loss of gas pressure may result in improper interrupting action. Low gas pressure is signaled by a red target in the gas-pressure indicator at the terminal end of each interrupter. A gray target indicates normal pressure.

SHUN'J."TRIP DEVICE If the optional shunt-trip device has been specified, a shunt-trip solenoid housing will be attached to the mounting-frame weldment, near the rotating insulator of each pole-unit. An insulated operating shaft will be connected between this shunt-trip solenoid housing and the shaft extending from the shunt-trip linkage housing on the pole-unit brain. Factory-installed conduit and control wiring is provided between the shunt-trip solenoid hous- ings-ready for connection to factory-installed conduit and control wiring inside the mounting pedestal (if an S&C Mounting Pedestal has been specified). The conduit and the control wiring on the mounting-frame weldment can be connected to the conduit and control wiring inside the mounting pedestal any time after the mounting-frame weldment is installed on the mounting pedestal.

Control wiring for the shunt-trip solenoids should be left disconnected at the switch operator end until Step 6 has been completed. Refer to S&C Instruction Sheet 711-600 for recommended wire sizes for the control wiring.

DO NOT INTERMIX COMPONENTS FROM DIFFERENT INSTALLATIONS

S&C maintains an historical record-by serial number-of every Circuit-Switcher produced. This record lists information pertinent to each instal- lation, such as application, date of shipment, and any service performed by S&C factory service specialists. This record is invaluable when questions arise relative to modifications or replacements. I t is important, therefore, that the various compo- nents belonging to a specific Circuit-Switcher installation not to be intermixed with components belonging to a different installation.

For this reason, each Circuit-Switcher is serially numbered. This serial number is stamped on the nameplate affixed to the mounting-frame weldment and also on the nameplate affixed to the switch operator (or the manual geared operating handle if the Circuit-Switcher is manually operated).

To facilitate identification during erection, the serial number, the sales-order number, and the erection-drawing (ED) number are marked on the Circuit-Switcher mounting-frame weldment, as well as on the switch operator shipping crate, and on all crates, boxes, and bundles for the other components associated with the installation.

Please complete and mail the Circuit-Switcher registration card (enclosed in the water-resistant envelope) after the Circuit-Switcher has been installed. The information requested on this card is vital to ensure prompt notification in the event field modifications are needed.

L

7 1 1 =500 INSTRUCTION SHEET Page 6 of 12 S&C ELECTRIC COMPANY Chicago December 16,1991 S&C ELECTRIC CANADA LTD. Toronto

I INSTALLATION I

Do not remove the interrupter containers until theinstallation has been completed.

Step 1For Circuit-Switchers rated 69 kv only: To reduceshipping volume, the jaw-contact insulators have beentilted toward the interrupters and, as a result, thedisconnect blades have been shipped in a partially openposition. See Figure 3. Two factory-adjusted studassemblies are provided on the mounting-frameweldment, at each pole-unit position, for use inrepositioning the jaw-contact insulators to the correctangle. Reposition each jaw-contact insulator as follows:(a) Remove and discard the wood brace attached to

the three disconnect blades.(b) Remove and discard the brace between the jaw-

contact terminal pad and the disconnect blade at

(c) Remove, from each stud assembly, the top nut,lockwasher, and one of the two flat washers. SeeFigure 3 (inset). Leave the second flat washer inplace. Do not disturb the factory-setting of theremaining three nuts on each stud assembly.

(d) Remove and discard the two upper bolts whichsecure the insulator support at each pole-unitposition. See Figure 3 (inset). Loosen the two lowerbolts which secure the insulator support at eachpole-unit position, and tilt the insulator forwarduntil it rests on the flat washers remaining on thestud assemblies.

(e) Replace, on each stud assembly, the flat washer,lockwasher, and nut removed in (c), above. Securelytighten the two lower bolts at each pole-unitposition loosened in (d), above.

Step 2Unbolt the mounting-frame weldment from the

each. pole-unit position. shipping skids.

Brace (remove anddiscard)

Wood brace(remove and discard)

Interrupter target Disconnect blade

’ StudP’ assembly

discard thesebolts

bolts

Figure 3. S&C Circuit-Switcher-Mark V, Three-Pole Integer Style, 69 kv, with insulators in tilted position for shipment.

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INSTRUCTIO1S SHEE7 7 11.500Page 7 of 12

December 16,199l

S&C Circuit-Switchers - Mark V Integer Style Outdoor Transmission 34.5 kv through 69 kv I I INSTALLATION - Continued I

Step 3 Install the mounting pedestal as indicated on the erection drawing.

Step 4 Attach suitable lifting slings to the four lifting eyebolts furnished on the mounting-frame weldment. See Figure 4. Be sure eyebolts are screwed in tightly. Do not apply lifting force to any eyebolt at an angle less than 60” from the horizontal. Avoid sudden starts and stops. Hoist this assembly onto the mounting pedestal, taking care to see that the lifting slings do not bear on the center pole-unit.

Bolt the mounting-frame weldment to the base pedestal using eight %“-llX2“ hex-head galvanized steel cap screws, sixteen flat washers, eight lock- washers, and eight 5/8”-11 hex nuts furnished. Use shims as required. Torque the cap sc~ews to at least 85 foot-pounds.

Cut and remove the shipping wires as indicated in figure 5.

SHUNT-TRIP DEVICE If the optional shunt-trip device has been specified, the conduit and the control wiring on the mounting- frame weldrnent can now be connected to the conduit and the control wiring inside the mounting pedestal. Also, fully disengage the retractable bracket which secures the shunt-trip operating shaft extending from each brain, as shown.

5 bracket

Step 5 Install the switch operator as indicated on the erection drawing.

Step 6 Refer to S&C Type CS-1A Switch Operator Instruction Sheet 719-500, which has been placed inside the door of the switch operator, and proceed as outlined therein in the “INSTALLATION and “MANUAL OPERATIONn sections.

not be attempted until its travel-limit discs have been properly adjusted as described in S&C Instruction Sheet 719-500.

Step 7 For 34.5-kv and 46-kv Circuit-Switchers only: These devices are shipped with disconnect blades in the fully closed position. Manually operate the switch operator to bring it to the same position (fully closed) as the Circuit-Switcher.

Attach the flexible or universal coupling to the output shaft of the switch operator.

Check to be sure that the cutting tips of the piercing set screws do not protrude through the body of the flexible or universal coupling. Then install the vertical shaft as indicated on the erection drawing. Tighten the clamp bolts equally so that the clamp pulls down evenly. Then tighten the piercing set screws, piercing the shaft, and continue turning until a firm resistance is felt.

Refer to S&C Instruction Sheet 719-500 and adjust the switch operator for electrical operation as described in the “ADJUSTMENTS section. Note in particular that, when the switch operator travel-limit adjustments have been completed, all auxiliary contacts being used must be checked for proper operation.

7 1 1 -500 INSTRUCTION SHEET Page 8 of 12 S&C ELECTRIC COMPANY Chicago December 16,1991 S&C ELECTRIC CANADA LTD. Toronto

1 INSTALLATION - Continued I

For 69-kv Circuit-Stitchers only: These devices areshipped with disconnect blades in a partially openposition.

Attach the flexible or universal coupling to the outputshaft of the switch operator.

Check to be sure that the cutting tips of the piercingset screws do not protrude through the body of theflexible or universal coupling. Then install the verticalshaft as indicated on the erection drawing. Tighten theclamp bolts equally so that the clamp pulls down evenly,but do not tighten the piercing set screws at this time.Then, using the switch operator’s manual operatinghandle, crank the Circuit-Switcher to the fully closedposition. Next, loosen the clamp bolts on the flexibleor universal coupling on the switch operator’s outputshaft and crank the switch operator to the closedposition as indicated by its closed position indicator.Retighten the clamp bolts. Then tighten the piercingset screws, piercing the shaft, and continue turning untila firm resistance is felt.

Refer to S&C Instruction Sheet 719-500 and adjustthe switch operator for electrical operation as describedin the ‘ADJUSTMENTS” section. Note in particular that,when the switch operator travel-limit adjustments havebeen completed, all auxiliary contacts being used mustbe checked for proper operation.

A \ 60” minimum angleI

igure 4. Method of hoisting, using nylon slings.

INSTRUCTION SHEET 7 llm5mq S&C ELECTRIC COMPANY l Chicago Page g of 12

S&C ELECTRIC CANADA LTD. l Toronto December 16,lggl

S&C Circuit-Switchers - Mark VI

Integer StyleOutdoor Transmission 34.5 kv through 69 kv

SHUNT-TRIP DEVICEIf the optional shunt-trip device has beenspecified, the control wiring for the shunt-tripsolenoids should be connected to the terminalblock in the switch operator at this time. See S&CInstruction Sheet 71 l-600.

Step 8Because this Circuit-Switcher was carefully adjustedat the factory, the only field adjustments that shouldbe required are those described in S&C InstructionSheet 719-500. There are, however, several checks thatshould be made to ascertain that no adjustments weredisturbed during shipment.

ing the opening operation an initial peaking of effortwill be required as the drive-shaft crank leaves itsclosed, toggle position. Rotation should progresssmoothly but with a noticeable increase in effort asthe blades pass beyond their half-open position. It isat this position that the stored-energy source withineach brain begins to charge as the interrupter closes.

As the opening continues, this stored-energy sourcecharges and latches, and a final peaking of effort againwill be required as the drive-shaft crank goes into toggleagainst its open stop. The blades will now be in thefully open position and the interrupters will be closed,as indicated by the gray interrupter target on the sideof each brain. See Figure 3.

Operate the switch operator with its manual oper-ating handle to check three-pole group operation. Dur-

LRorarmg- - - - -Lnsulator *..s; y Drive-shaft cran

closed stop

I -Shipping wires-cut and remove I

Rotating-ikulatorlever open stop

Flexible conduit and stop

/ Shunt-trip solenoid housing Icontrol wiring forshunt-trip solenoids-connects to conduitand wiring insidemounting pedestal (iffurnished)

Figure 5. Mounting-frame weldment details.

7 ljm500 INSTRUCTION SHEETPage 10 of 12December 16,199l

S&C ELECTRIC COMPANY l ChicagoS&C ELECTRIC CANADA LTD. l Toronto

Verify the following:(a) During the opening sequence, the interrupter target

on the side of each brain housing changes fromgray to yellow when the interrupter is opened, thenback to gray, indicating the normally closedposition of the interrupter. In addition, the

- interrupter target remains gray when the Circuit-Switcher is closed, indicating that the interrupteris closed.

(b) As the Circuit-Switcher reaches either the fullyopen or fully closed position, the drive-shaft crankstrikes firmly against the appropriate drive-shaftcrank stop. See Figure 5. Also, note that eachrotating-insulator lever makes contact with itsrespective open stop.

(c) The blade crank-arm at the top of each brain restsagainst the blade crank-arm stop in the fully openposition.

(d) No more than a %-inch gap exists between eachblade crank-arm and its associated blade crank-arm stop in the closed position. See Figure 6.

(e) Upon closing, the current-carrying tongue contactson each disconnect blade enter the current-carrying jaw contacts with equal clearance on eachside. See Figure 7.

Open stop-blade crank-armmust contact open stop in open position

Closed stop-%-inchgap allowable in closedposition

\ Blade crank-arm

rlgure ti. trtaae mecnamsm aerass.

Should any of the foregoing checks indicate thatadjustments are required, contact the nearest S&CSales Office.

bumper stop

contacts

Figure 7. Tongue-contact and jaw-contact assembliesshown in partially closed and fully closed positions.

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INSTRUCTION SHEET 7 111500Page 11 of 12

December 16,199i

S&C Circuit-Switchers - Mark V Integer Style Outdoor Transmission 34.5 kv through 69 kv I I FINAL CHECKS - Continued I

Step 9 Remove the container from each interrupter as follows: (a> Remove and discard the 3/8"-16 zinc-plated serrated

hex nuts which run the length of the container. (b)Remove and discard the %"-16X%" and two

%"-16Xl"zinc-plated hex-head cap screws and flat washers which attach the upper container-half to the coupling end casting of the interrupter. Also remove and discard the %"-16X7/" and two 3/8"-16X1" zinc-plated hex-head cap screws and flat washers which attach the upper container-half to the indicator end casting of the interrupter.

(e) Pry the container-halves apart with a screwdriver. The upper container-half can now be removed and discarded-slotted holes are provided so that a rope or lifting sling can be attached and the container- half more conveniently lowered to the ground.

71 1400 Page 12 of 12 December 16,1991

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INSTRUCTION SHEET

(d j Now remove and discard the 3/s"-16x7/" hex-head cap screw and flat washer which attach the lower container-half to the coupling end casting of the interrupter, and the 3/8"-16X%" hex-head cap screw and flat washer which attach the lower container- half to the indicator end casting of the interrupter. Then discard this container-half.

(e> Finally, remove and discard the foam-core inner liner wrapped around the interrupter.

Now remove the shield for the pressure-relief device.

step 10 Please c0mpkt.e and mail the Circuit-Switcher regis- tration. card! The information requested on this card is vital to ensure prompt notification in the event field modifications are needed.

S&C ELECTRIC COMPANY Chicago S&C ELECTRIC CANADA LTD. 0 Toronto