Instruction Sheet 711-520 [English, 2 MB, 12/16/1991]

S&C Circuit-Switchers

-

Mark

V

Center-Break Style

Outdoor Transmission

I

With extruded-aluminum weldment bases

230 kv

INSTRUCTIONS

For

Field Assembly and Installation

Section

INTRODUCTION

Page Number Section

........................................

1

COUPLING THE THREE POLE-UNITS

BEFORE STARTING INSTALLATION

ASSEMBLY OF INDIVIDUAL POLE-UNITS.. FINAL CHECKS AND ADJUSTMENTS

Page Number

....................

.19

......................

.5 INSTALLING THE SWITCH OPERATOR

...................

....................

.22

I

INTRODUCTION

The equipment covered by this publication must be selected for a specific application and installed, operated, and maintained it must be 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-

Circuit-Switchers, with extruded-aluminum weldment bases, rated 230 k v ,

1600 amperes and 2000 amperes continuous. See Figure 1. 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-

V Circuit-Switcher is suitable for frequent operation over a long period 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 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

. . . a fully enclosed stored-energy source dedicated solely to operation of the interrupter which is in t h e circuit at all times. Close-and-trip mechanisms are fully enclosed and protected, too.

1

etc. that must be coordinated with a disconnect blade operation is assured regardless of severe weather conditions such as high winds, rain, sleet, or

The fault-closing contacts utilized on Center-Break

Style Mark V Circuit-Switchers consist of a rugged stainless-steel tongue contact and a tempered silicon- bronze jaw contact. This contact arrangement assures long operating life and contributes to Center-Break

Style Mark V Circuit-Switcher's high fault-closing capability. Dissimilar metals prevent contact welding.

The current-carrying contacts utilized on Center-

Break Style Mark V Circuit-Switchers consist of a multifinger, spring-loaded, silver-plated, 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 path.

Mark V Circuit-Switcher features a base-integrated transmits and controls energy at high operating simultaneity. The drive train utilizes 186-degree

S&C ELECTRIC CANADA LTD.

S&C ELECTRIC COMPANY

Supersedes lnstructlon Sheet 711-520 dated 3-17-86 '1991

Chicago

Toronto

INSTRUCTION SHEET

7 1 1

Page 1 of 22

December 16,1991



1

INTRODUCTION

- vertical-shaft rotation t o provide full toggle action at both ends of closing and opening strokes for smooth, ical advantage is developed at stroke ends for power opening and closing without hesitation under 1%-inch ice formation, as discussed below under “Power

Operation.”

Power Operation

High-speed, high-torque power operation of S&C

Mark V Center-Break Style Circuit-Switchers to provide a two-time duty-cycle fault-closing rating of

40,000 amperes rms three-phase symmetrical,

102,000 amperes peak (see “Basis of Fault-Closing

Ratings” below).

Power operation of Mark

V

Center-Break Style

Circuit-Switchers also provides opening and closing without hesitation under 1%-inch ice formation; close interphase simultaneity; long life of fault-closing of excessive switching transients due to prolonged or unstable prestrike arcing. Mark V Circuit-Switchers are 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 t o Center-Break Style Mark V Circuit-

Switchers when powered by S&C Switch Operators-

Type CS-lA, and is based on performance

as

follows:

1. The Circuit-Switcher is capable of two fault-closing

‘perations

Of

‘losing against and for 10 cycles its rated fault-closing current, after current and is capab1e

Of power operation“either opening or closing.

I

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 Center-Break 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 the operating handle-and must at be considered in

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 apparatus (e.g., bushings), adjoining bus or other

Use of flexible-conductor connections at Circuit-

Switcher’s terminal pads will compensate for inherent insulator-column deflection and is recommended both ends, except when the accessory at

Switcher Catalog Number Suffix

GG-Bz,’) is furnished. In this instance, a rigid bus connection is necessary at the rotating-insulator end. The weight of the bus any associated ice load exerts a vertical force on the

Circuit-Switcher terminal Dads. This vertical force must

Chicago

Toronto


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Page3 of 22



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Mark V

Center-Break Style


I


230 kv

I

INTRODUCTION

-

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at the disconnect-blade end. Conductors attached at the disconnect-blade end must be sufficiently rigid to preclude wind-induced of the terminal pads.

Seismic Withstand Capability

S&C Mark

V

Circuit-Switchers, when installed with recommended S&C Mounting Pedestals and anchor bolts, are capable of withstanding seismic loading of

0.2 g 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- in accordance with S&C's recommended schedule and procedures contained in

S&C Instruction Sheet 71 1-590.

Should the user wish to perform elective exercising of the complete Circuit-Switcher installation-including the shunt-trip device, when this option is furnished-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 "-B2"). Even if the bypass accessory has not 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 this option is furnished-is rendered inoperative, thereby permitting checkout of the system protective scheme.

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Page 4 of 22

December 16,1991 S&C

S&C ELECTRIC COMPANY Chicago

ELECTRIC CANADA LTD. Toronto

I


Checking the Shipment

An S&C erection drawing will be found in a water- resistant envelope attached to the interrupter container on one of the three Circuit-Switcher pole-units.

This gauge pipe is an alignment tool and should be

1

lowing items, as shown in Figure 2:

1.

Three pole-units, each mounted on a skid. The live parts-which are attached directly to the insulator- mounting flanges-are factory-assembled and adjusted and

should not be interchanged

during

their

removal f o r installation

of

the

insulators.

2. A crate which contains miscellaneous power-train components, interphase couplings, mounting hardware, and a temporary adapter for hand operation of the individual pole-units-all individually identified.

3.

The vertical operating shaft, interphase shafts, and connecting shaft, which are bundled and shipped

Otherwise, the correct number of shaft sections are shipped for field cutting in accordance with the dimensions specified on the erection drawing.

IPS are furnished if the distance from the gearbox to the farthest pole-unit is 25 feet or less. If this distance exceeds 25 feet, interphase shafts and connecting shaft of 3-inch IPS are supplied.

Vertical shafts of 2Yi-inch IPS are furnished if the gearbox mounting height is 25 feet or less.

If the gearbox mounting height is over 25 feet, vertical shafts of 3-inch IPS are supplied. in separate crates. indicates normal pressure.

5. A specially prepared gauge pipe, identified by a red of the pole-unit

6.

S&C Mounting Pedestals (if specified) consisting of a set of six, of square steel tube construction.

7.

An

S&C Switch Operator-Qpe CS-1A (as specified).

8. Any accessories specified, such as shunt-trip device, bypass accessory, grounding switch, or pre-insertion

Interrupter Target

Circuit-Switchers are usually shipped with the interrupters 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

(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

S&C ELECTRIC

S&C ELECTRIC

CANADA LTD.

COMPANY Chicago

Toronto


7

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Page 3 of

22



-

Mark V

Center-Break Style

Outdsor Transmission

I

With extruded-aluminum weldment

230 kv

1


SHUNT-TRIP DEVICE

a shunt-trip solenoid housing will be attached to the side of each pole-unit base near the center insulator support, and a shunt-trip linkage will be a t t a c h e d t o t h e b r a i n . T h e C i r c u i t - S w i t c h e r shipment will also include, in separate cartons, insulator units and hardware for the three shunt- trip insulated operating shafts. The cartons containing these insulator units should be opened

but the units

should

be

left in their boxes until installation

to prevent

Installation of the shunt-trip insulated operating shafts should be performed following Step

25.

Conduit and control wiring from the switch furnished by the user-may be installed any time after the Circuit-Switcher pole-units have been permanently mounted in place. Conduit size should trip solenoids should be left disconnected at the switch operator end until Step 38 has been completed. Refer to S&C Instruction Sheet 71 1-600 bases

I

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 installation, 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. It is important, therefore, that the various components belonging t o installation a specific Circuit-Switcher

not

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 each individual pole-unit base 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 of each Circuit-Switcher pole-unit base; on each pole-unit shipping crate or skid; on the gearbox base; on the switch operator shipping crate, and on all crates, boxes, and bundles for the other components associated with the installation. In addition, each Circuit-Switcher pole-unit base, as well as the pole-unit skid, is marked “Pole 1,”

2,”

or “Pole 3,” corresponding to the mounting position of the pole-unit on the erection drawing.

These pole-unit numbers are not necessarily phase designations.

IASSEMBLY

OF INDIVIDUAL POLE-UNITS

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

I

PIERCING SET SCREWS

it is imperative that careful attention be given to the correct installation of the piercing set screws provided on all operating-shaft couplings. Before installing an operating shaft in any coupling, make certain that the cutting tips of the piercing set screws do not protrude through the body of the as directed in the step-by-step. instructions that follow, but in

on19

after the associated clamp bolts have been torqued to final tightness.

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Page 6 of 22



S&C ELECTRIC CANADA LTD. Toronto

ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued

Step 1

Without removing the Circuit-Switcher pole-units from their skids, arrange them in the position and order in which they will be raised onto their mounting pedestals or structure as shown on the erection drawing. Each pole-unit base is numbered, corresponding to its position as indicated on the erection drawing. (The pole-unit numbers are not necessarily phase designations.) Moreover, the three pole-units carry the same serial number located on the nameplate of each poleunit base. In the event that more than three pole-units are available, care should be taken to be sure that the serial numbers are matched for each Circuit-Switcher installation. The switch operator also carries the

Circuit-Switcher serial number on its nameplate to aid in making certain that the operator is used with the correct Circuit-Switcher.

Each skid should rest firmly and be reasonably level,

Shoring under the skids may be necessary if the ground is uneven. Sufficient space must be provided to permit full blade opening of each pole-unit without interference with the adjacent pole-unit or pedestal. The blades will open to the left, as viewed from the interrupter end.

Repeat the following Steps 2 through 22 for each of

the three Circuit-Switcher

pole-units.

Step 2

Carefully remove the outer crate (if provided), but leave the skid attached to the pole-unit base. Remove the blocking members which support the live parts during shipping. See Figure 2. Inspect for any obvious shipping damage before continuing installation.

Step 3

Attach the temporary hand-operation adapter, which is provided, to the drive-shaft crank on the side opposite the direction of blade opening as shown in Figure 3.

(Use this same temporary hand-operation adapter when checking and adjusting the other two pole-units.)

Step 4

With the hand-operation adapter, open and close the pole-unit several times to obtain the “feel,” and observe the operation of Circuit-Switcher as adjusted by the factory.

Note that:

(a) During the opening operation an initial peaking of effort will be required as the drive-shaft crank leaves its closed, toggle position. Rotation should progress smoothly but with a noticeable increase in effort

Interrupter

Pressure-relief device base

Container for shunt-trip insulated operating shaft

Figure 2. Pole-unit on skid.

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S&C ELECTRIC COMPANY l

Chicago


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Toronto solenoid housing

Stationary insulator support

INSTRUCTION SHEET

7 Il.520

Page 7 of 22

December 16,lggl

S&C Circuit-Switchers - Mark V


Center-Break Style


230

kv

ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued as the blades pass beyond their half-open position.

It is at this position that the stored-energy source within the brain begins to charge as the interrupter closes.

As the opening continues, this stored-energy source charges and latches, and a final peaking of effort again will be required as the drive-shaft crank goes into toggle against its open stop. Both blades will now be in the fully open position at an angle slightly greater than 90 degrees from the pole-unit base. With the blades in the fully open position, the interrupter will be closed, as indicated by the gray interrupter target on the side of the brain. See

Figure 3.

(b) During the opening sequence, the interrupter target on the side of the brain housing changes from gray to yellow when the interrupter is opened, then back to gray, indicating the normally closed position of the interrupter. In addition, the interrupter target remains gray when the Circuit-Switcher is closed, indicating that the interrupter is closed.

(c)As the Circuit-Switcher moves toward the closed position, rotation should progress smoothlywith the fault-closing tongue contact in proper mesh with the fault-closing jaw contact and with the currentcarrying tongue contact entering the currentcarrying jaw contact evenly. See Figure 4. This same engagement should be attained after the live parts have been removed and reassembled on the insulator stacks.

(d) As the Circuit-Switcher reaches either the fully open or fully closed position, the drive-shaft crank will be felt to strike firmly against

an

internal driveshaft crank stop (not visible) in the drive-shaft assembly. See Figure 3. The toggle-loading snubbers

(located on the pole-unit base adjacent to the rotating-insulator supports) maintain positivetoggle locking at each end of the operating stroke.

Both the internal drive-shaft crank stops in the drive-shaft assembly and the toggle-loading snubbers have been carefully adjusted at the factory and readjustment should not be attempted.

1

1600-Ampere Rating

Drive-shaft crank stops

(not visible)

lnterruoter taraet

7

Temporary handoperation adapter

Fault-closing tongue contact

7

Current-carrying jaw contact

It-closint contact

Figure 3. Base-integrated power train being operated with the temporary hand-operation adapter.

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11420 INSTRUCTION SHEET

Page 8 of 22

December 16,199l

Current-carrying’ tongue contact


Figure 4. Blade-contact detail.


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Chicago


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Toronto

1 ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued electrical contact.

Step 5

Loosen the disconnect-blade clamps and carefully remove both blade assemblies intact. This operation can be performed with the Circuit-Switcher pole-unit in either the fully closed or fully open position. However, after removal of the blade assemblies, make sure the pole-unit is placed in the fully closed position to establish a point of reference and to facilitate reassembly. Note: As live parts are disassembled, use care to set them aside on a clean surface. Dirt adhering to the current-transfer surfaces could result in poor

Note: A corona shield is furnished, to be attached to the tongue-contact blade assembly as shown in

Figure 17. As shipped, however, the corona shield is clamped near the hinge end of the tongue-contact blade, as shown in Figure 2, to prevent interference with the drive-shaft crank. Do not move the corona shield to its normal position until so directed in Step 22.

Step 6

Remove the brain-and-interrupter assembly from the insulator-mounting supports, following the procedure described below.

(a) Attach lifting slings in the manner shown in

Figure 6. Be sure that the slings do not interfere with the interrupter target on the side of the brain, the gas-pressure indicator, the pressure-relief device, or the shunt-trip operating shaft (if applicable).

(b) Loosen the adjusting screws at both bladeadjustment discs. Figure 5 illustrates the terminalend blade-adjusting screws.

(c) Remove the cap screws fastening the blade-hinge assembly to the blade-adjustment disc on the center insulator support, and the cap screws fastening the interrupter terminal pad to the stationary insulator support.

(d) Hoist the brain-and-interrupter assembly and set it aside on a clean surface. Do not permit the assembly to rest on the shunt-trip shaft extending from the brain (if applicable).

Retain the stainless-steel hardware for reuse; discard the galvanized cap screws used to fasten the terminal pad to the insulator support.

Step 7

Remove the remaining live parts from the rotatinginsulator supports. First, remove the blade-hinge assembly at the terminal-end rotating insulator support; retain the stainless-steel cap screws for reuse.

Then remove both blade-adjustment discs; discard the galvanized cap screws.

I

Figure 5. Blade-adjusting screws.

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Chicago


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Toronto

2000-Ampere

INSTRUCTION SHEET

7 11.520

Page 8 of 22




I

Center-Break Style


230

kv


Step 8

Assemble the insulator stacks, with rain shields (where applicable) installed in accordance with the instruction sheet furnished with the insulators directly on their insulator mounting flanges, using the galvanized hardware specified in Figure 7.

Step 9

Check each rotating insulator stack for eccentricity as follows:

(a

Locate the centerpoint of each insulator stack by accurately drawing, on the top of the insulator cap, temporary lines which bisect and connect opposite bolt holes. See Figure 8.

(b

Stretch a cord taut across the top of the insulator caps so that it crosses the centerpoint on the rotating insulator stack. (At this time the cord need not cross the centerpoint of the other two insulator caps.)

(c) Make a mark on the cord at the point where it crosses the centerpoint of the rotating insulator stack. (Alternately, for use as a reference, any fixed object may be extended over the centerpoint of the rotating insulator stack. The fixed object may be supported, for example, by attachment to a vertical length of wood or pipe the height of the insulator stack, clamped to the pole-unit base.)

(d) Operate the temporary hand-operation adapter and check to see that the mark on the cord remains within l/a inch of the centerpoint of the rotating insulator cap as the insulator stack turns. Any eccentricity in excess of this value must be corrected by placing shims between the insulator stack and its support. See Figure 8. Shimming material is included with the insulator hardware in a cloth sack attached to the pole-unit base.

Torque to final tightness all insulator-stack cap

screws, including those fastening the insulator stacks to the insulator supports.

When adjustments have been made to eliminate eccentricity, the perpendicularity of the rotating insulator stacks with respect to the base will be within acceptable limits.

1

Blade-hinge

Terminal pad

Shunt-trip operating shaft

/

Figure 6. Lifting brain-and-interrupter assembly.

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Page 10 of 22



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[ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued

Step 10

The stationary insulator stack should be checked for alignment with the rotating insulator stacks by stretching a cord taut across the top of the insulator caps so that it crosses the centerpoint of all three insulator stacks. Then measure the center-to-center distance between the stationary insulator stack and the center rotating insulator stack. See Figure 8. This distance must be within $6 inch of the dimension shown on the erection drawing.

Figure 8. (The leveling screws are threaded into the insulator-support flange.) To avoid changing the effective height of the insulator stack, do not adjust

more than three of the four leveling scrms.

(b) Retighten the four locking nuts.

Note: Alignment of the insulator stacks, as directed in Steps 9, 10, and 11, is essential to obtain correct latching of the brains and to obtain close interphase simultaneity during opening.

I

Step 11

Adjust for the necessary centerline distance and the stack alignment, as described in Step 10, as follows:

(a) Using the access holes in the sides of the base, hold the four lot ing nuts and turn the leveling screws located unBr the stationary insulator support. See

Step 12

So that the live parts may be installed in their proper relationship to the rotating insulator stacks, establish a point of reference by placing the pole-unit power train in the fully closed position (see the erection drawing to verify the applicable direction of rotation).

Stationary insulator stack

Hardware (including rain shields

where applicable) included with insulator shipment

. 5/s”-

11X1%” hex-head galvanized steel cap screws and lockwashers

Figure 7. Insulator stacks assembled on pole-unit.

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S&C ELECTRlC COMPANY

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Chicago


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INSTRUCTION SHEET

7 111520

Page 11 of 22

December 16,lggl



I

Center-Break Style


230

kv


Mount a blade-adjustment disc on each rotating insulator stack, using hex-head galvanized steel cap screws as specified in Figure 9 (see also Figure 10).

The cap screws for mounting the blade-adjustment discs must be torqued to final tightness. This is important because access to the cap screws will be restricted later.

Make sure that the cap screws are the correct length.

Screws longer than those specified may bottom in the mounting holes in the insulator caps without effectively tightening against the blade-adjustment discs.

Step 13

Mount the brain-and-interrupter assembly with the same handling care that was cautioned for its removal.

See Figure 11. Be sure to place the brain-andinterrupter assembly on the same pole-unit from which it was removed. The cap screws at the terminal end of the brain-and-interrupter assembly should be

torqued tofinal tightness; the stainless-steel cap screws in the slotted holes of the blade-hinge assembly should be left loose enough for adjustment. See Figure 11 for hardware sizes.

Extreme care should be exercised to prevent fouling the interrupter target, the gas-pressure indicator, or the pressure-relief device with the lifting sling or fall lines, and to prevent their contact with other objects during lifting. See Figure 11.

Step 14

Mount the terminal-end blade-hinge assembly on its rotating insulator stack in a manner similar to that described in Step 13, with the stainless-steel cap screws snug, but loose enough for the slot adjustment. See

Figure 12.

Within % inch of

- d i m e n s i o n s h o w n on erection drawing

Centerpoint

S t a t i o n a r y / U insulator cap zz

o base. Use shims

Figure 8. Obtaining critical dimension and alignment with shims and leveling screws.

Lock nuts

71 l-520

INSTRUCTION SHEET

Page 12 of 22


S&C ELECTRIC COMPANY 8 Chicago

S&C ELECTRlC CANADA LTD.

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Toronto

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[ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued


Adjusting screws

1

Torque cap screws to final tightness

T---h-!

2000-Ampere Bating

6/s”-

11 Xl%” hex-head galvanized steel cap screws and lockwashers

Figure 9. Blade-adjustment discs.

Figure 10. Mounting blade-adjustment discs (one on eacl

rotating insulator stack.) 1600-ampere rating shown.

stainless-steel cap screws, lockwashers, and special

%6”-thick flat washers

2000-Ampere Rating:

W-1 1 X2” hex-head stainless-steel cap screws, lockwashers, and special

%“-thick flat washers lade-adjustment disc

Stationary insulator

Figure 11. Lifting brain-and-interrupter assembly into place.

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s&c ELECTRIC COMPANY

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Chicago


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Toronto

INSTRUCTION SHEET

7 11420

Page 13 of 22




Center-Break Style


230

kv

ASSEMBLY OF INDIVIDUAL POLE-UNITS

- Continued

1600-Ampere Rating: 5/~“-llX1%” hex-head stainless-steel cap screws, lockwashers, and special

I r-

%“-thick flat washers

2000-Ampere Rating: 5fi’-llX2” hex-head stainless-steel cap screws, lockwashers. and special

Figure 12. Mounting a terminal-end blade-hinge assembly

(1600-ampere rating shown).

Step 15

Remove the top sections of the blade clamps on both blade-hinge assemblies and lay the gauge pipe across the hinge assemblies as shown in Figure 13.

Loosen the adjusting screws on both bladeadjustment discs to provide ample freedom of movement to align the blade-hinge assemblies with the gauge pipe.

Step 16

Replace the top sections of the blade clamps and clamp

the gauge pipe securely in place.

Next, with the drive-shaft crank held firmly against its closed stop by means of the temporary handoperation adapter, torque the cap screws of both bladehinge assemblies to final tightness.

Then tighten the adjusting screws at both bladeadjustment discs. See Figure 13.

Step 17

Remove the gauge pipe by removing the blade clamps.

Replace these blade clamps; then replace the jawblade assembly in the brain-end blade-hinge contact assembly from which it was removed. Insert the blade assembly into the blade clamp until the leading edge of the guide mark is in line with the end of the blade clamp. Tighten the clamp securely. See Figure 14.

Blade clamps ltiahtened) adjusting screws

G2

, I

Figure 13. Blade-hinge alignment (1600-ampere rating shown).

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Page 14 of 22



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Step 18

Open the Circuit-Switcher pole-unit and insert the tongue-contact blade assembly in the terminal-end blade-hinge assembly. Rotate the blade assembly to position it so that the curvature of the fault-closing tongue contact is in the direction of blade travel during closing. See Figure 15 and Figure 16. Tighten the blade clamp securely.

for V-inch to 3/16-inCh clearance from the jaw-contact housing, as shown in Figure 16 (inset), by loosening the fault-closing tongue-contact support and sliding it along the blade. The bottom cover of the jaw-contact housing must be removed to check this measurement.

I

step 19

Close the Circuit-Switcher pole-unit and note the guide mark on the tongue-contact blade. See Figure 16. This mark should be in line with the edge of the jaw-contact housing to ensure proper blade engagement.

If the guide mark does not line up with the edge of the jaw-contact housing, loosen the blade clamp that holds the tongue-contact blade assembly and move that blade assembly in or out as required.

Torque all blade-clamp bolts to final tightness.

Step 21

Open and reclose the Circuit-Switcher pole-unit to check blade entry. The current-carrying tongue contacts should enter the current-carrying jaw contacts evenly with no tendency to clash against either side.

See Figure 4.

Should adjustment be necessary, it may be accomplished with the blade-adjustment disc at the terminal-

end rotating stack only. Do not disturb the bladeadjustment disc of the center rotating stack because this can impair the latching and tripping action of the brain.

Under no ccmditions should adjustment be attempted on the power train on the base.

Step 20

For Circuit-Switchers rated 1600 amperes, adjust the position of the tip of the fault-closing tongue contact

Jaw-contact blade assembly

,

Guide mark (align leading edge of mark with end of blade clamp)

/

Linkage cover

Retractable bracket

Figure 14. Inserting jaw-contact blade assembly at brain end (1600-ampere rating snown).


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INSTRUCTION SHEET

7 11420

Page 15 of 22




Center-Break Style


230

kv

1 ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued

Step 22

Loosen the corona-shield clamping bolts and slide the corona shield to its correct position (with rod ends of the fault-closing tongue contact indexed to holes in the corona shield) against the fault-closing tonguecontact support as shown in the inset of’ Figure 17.

Tighten the clamping bolts.

order indicated on the erection drawing. Make sure that the rigging does not stress the interrupter or the brain. Furthermore, extreme care should be exercised to prevent fouling the interrupter target, the gaspressure indicator, or the pressure-relief device with the lifting sling or fall lines during erection, and to prevent contact with other objects during lifting.

I

Step 23

After all three pole-units have been adjusted and individual pole-unit operation has been determined to be satisfactory, place all three pole-units in the fully closed position. Verify that all insulator-stack cap screws and cap screws securing the live parts are torqued to final tightness.

Before proceeding with Step 24, check the mounting pedestals (or structure) for plumb

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Do not lift a complete Circuit-Switcher pole-unit by the disconnect blade and/or the interrupter.

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Step 25

Bolt the Circuit-Switcher pole-units in place using

%-inch galvanized bolts, flat washers, lockwashers, and nuts (furnished only if so specified on order). The poleunit bases should be shimmed as required if the mounting surface is sufficiently irregular to distort the bases.

Step 24

With the blades in the fully closed position, unbolt the skids and, by lifting from the base, raise each Circuit-

Switcher pole-unit to the mounting elevation in the

Fault-closing tongue-contact support

Jaw-contact housing

\ -+ %” t0 3/16”

Fault-closing

Fault-closing tongue contact

Current-carrying tongue contact

Tongue-contact blade assembly

/

i---..

. ,

. .

.

igure 15.

Inserting tongue-contact blade assembly at srminal end (1600-ampere rating shown).

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Page 16 of 22


Guide mark (to be aligned with edge of jaw-contact housing)

igure 16. Checking for proper blade engagement.


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If the optional shunt-trip device has been specified, the insulated operating shafts should be installed at this time. The necessary conduitwith control wiring of recommended size-should be in place, although the control wiring for the shunt-trip solenoids should be left disconnected at the switch operator end until Step 38 has been completed. Refer to S&C Instruction Sheet

71 l-600 for instructions on insulated operating shaft installation.

After the insulated operating shaft has been installed, fully disengage the retractable bracket which secures the shunt-trip operating shaft extending from each brain, as shown in Figure 14.

Step 26

After all three pole-units have been bolted to the structure in accordance with the erection drawing, operate each Circuit-Switcher pole-unit alternately to its fully open and fully closed positions, using the handoperation adapter. In each position the drive-shaft crank, as it goes into toggle, should be felt to strike firmly against an internal drive-shaft crank stop (not visible) in the drive-shaft assembly. See Figure 3. The toggle-loading snubbers (located on the pole-unit base adjacent to the rotating-insulator supports) should maintain positive-toggle locking at each end of the operating stroke. Both the internal drive-shaft crank stops in the drive-shaft assembly and the toggle-loading snubbers have been carefully adjusted at the factory, and readjustment should not be attempted.

In each position (fully open and fully closed) examine the blade crank-arm at the top of the brain to verify that it rests against its respective stop. See Figure 18.

Do not attempt to adjust these stops. The stops are factory-set to provide the travel necessary to achieve full latching of the brain as well as tripping simultaneity.

The blade crank-arm may be viewed through the window in the top of the linkage cover. Do not remove the linkage cover itself. If the blade crank-arm at the top of the brain fails to meet its stop, in either the fully open or fully closed position, the most likely cause

1

Corona shield clamping bolts

Corona shield

s--;:

c=q

F&.

tongue-contact support

-zEi3 tongue contact

Figure 17. Pole-unit of a 230-kv Circuit-Switcher showing corona shield in its normal position.

INSTRUCTION SHEET


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7 11420

Page 17 of 2;




I

Center-Break Style


230

kv

ASSEMBLY OF INDIVIDUAL POLE-UNITS - Continued is misalignment of the stationary insulator stack. Adjust as follows:

(a) Loosen the cap screws which fasten the interrupter at the terminal end and, with the power train held securely against the drive-shaft crank stop, move the interrupter sideways (within the confines of the mounting holes) until the blade crank-arm stop makes firm contact with the blade crank-arm. See

Figure 18.

Torque to final tightness the cap screws which fasten the interrupter at the terminal end.

(b) If the above method does not provide sufficient movement, adjustment of the stationary insulator stack is required. In this case, loosen the cap screws which fasten the interrupter at the terminal end

(to relieve the strain) and adjust the stationary stack to align it with the rotating stacks. See Step 11.

Then repeat the adjustment described in (a) above.

c Blade crank-arm open stop

Blade crank-arm

Blade crank-arm

I irl

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Figure 18. Brain-linkage detail. Linkage cover removed only for photographic clarity.

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Page 18 of 22



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COUPLING THE THREE POLE-UNITS

Step 27

After each pole-unit has been checked and adjusted as described above, return it to the fully open (or fully closed) position and remove the temporary hand- operation adapter.

I

against the flange; this will deform the threads in the flexible plate, resulting in a binding, nonslip connection.

Install and tighten the self-locking nuts.

Do

not

use lockwashers with the flexible-coupling attachment bolts.

Step 28 Step 30

on the erection as shown drawing. Note:

To ensure proper installation, the alignment arrow on the gearbox should be positioned as indicated on the erection drawing. on the erection drawing. When performing this operation make certain that the cutting tips of the piercing set screws do not protrude through the body so that

Step

29

the clamp pulls down evenly. Take exceptional care

Attach the coupling assemblies for the interphase and during this procedure that each pole-unit remains in connecting shafts to the switch pole-units and gearbox its fully open (or fully closed), positive-toggle position.

as

shown on the erection drawing. See also Figure 19.

Thread the flexible-coupling attachment bolts through the flexible-coupling plate and through the coupling the shaft, and continue turning until firm resistance is felt.



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Page 19 of 22




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COUPLING THE THREE POLE-UNITS - Continued

Center-Break Style


230

kv

Flexible coupling

Clamp bolts (2) 7

- P i e r c i n g set screws (2)

Flexible-coupling attachment bolts

‘ t o be tightened to

(2)

draw the flexiblecoupling plate flush against the flange

Arrow on hub of gearbox to be oriented as indicated on erection drawing

Interphase shaft ’

Piercing set screws (2).

?-L I<

Vertical shaft

Clamp bolts (2)

.

screws (2)

Clamp bolts (2)’

Rigid coupling

Flexible coupling J

Refer to the erection drawing

Figure 19. Power-train details.

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11.520 INSTRUCTION SHEET

Page 20 of 22



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INSTALLING THE SWITCH OPERATOR

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Step 31

as

indicated on the erection drawing.* in the vertical shaft, bolt one to the switch operator not be attempted until its travel-limit discs have been properly adjusted

Instruction Sheet 719-500. from the gearbox. Alternately, if the erection drawing as described in S&C indicates flexible couplings in the vertical shaft, bolt

Electrical operation of the switch operator should one to the switch operator output shaft and one to the shaft extending downward from the gearbox.

Thread the flexible-coupling attachment bolts through the flexible-coupling plate and through the coupling

step 33

Manually operate the switch operator to bring it to the same position (fully open or fully closed) as the

Circuit-Switcher. Make certain that the cutting tips of the piercing set screws do not protrude through the body of the universal or flexible coupling attached to against the flange; this will deform the threads in the a binding, nonslip connection.

Install and tighten the self-locking nuts. Do

not

use the output shaft of the switch operator. Tighten the

Then tighten the piercing set screws, piercing the shaft, lockwashers with bolts. the flexible-coupling attachment

At the

gearbox

end

of the vertical shaft make certain that the cutting tips of the piercing set screws do not protrude through the body of the universal or flexible coupling. See Figure 19. Install the vertical shaft.

Step 34

Connect high-voltage conductors to their respective

Circuit-Switcher terminal pads. down evenly. Then tighten the associated piercing set screws, piercing the shaft, and continue turning until a firm resistance is felt.

Then couple the lower end of the vertical shaft to

not

tighten the clamp bolts

Conductors must be de-energized and grounded in accordance with standard system operating practice. Then proceed with the final checks and adjustments described in the following steps.

Fasten the free end of the grounding strap to the a few inches above coupling attached to the switch operator, using the grounding connector provided. Then fasten the other end of the grounding strap to a suitable earth ground.

Step 32

Refer to S&C Type CS-1A Switch Operator Instruction

Sheet 719-500, which has been placed inside the door

as

outlined therein under Steps

1 through 7.

*

If

more than one swltch operator

IS avallable, be sure to select the one Intended

for

the Circult-Swltcher mstallatlon belng made Make certain that the Clrcult-Swltcher serlal number, located

on

the Clrcult-Swltcher nameplate

on the switch operator,

agrees wlth the serlal number on the nameplate of each pole-unit.



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INSTRUCTION

SHEET

7 1

14310

P a g e 1 of 22



-

V

Outdoor Transmission With extruded-aluminum weldment

I

Center-Break Style

230 kv

FINAL CHECKS AND ADJUSTMENTS bases

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Step

35

Using the manual operating handle on the switch operator, open and close the Circuit-Switcher to check the three-pole group operation. The feeling of toggle action and the increase in opening effort as the stored- energy sources within the brains are charged will be similar to that experienced with single-pole operation. the first interrupter trips. From this point, no more than 40 degrees of rotation of the manual operating handle should be required before the other two interrupters trip. If this condition exists, the desired simultaneity has been attained.

Step 36

Check interrupter action by observing the target on the side of each brain. During the opening sequence, each target changes from gray to interrupter opens, then back to yellow when the gray, indicating the the interrupter targets remain gray when the Circuit-

Switcher is closed, indicating that the interrupters are closed.

Step

40

If simultaneity within the limits specified in Step 39 is not attained, recheck the blade crank-arm at the open and fully closed positions. If any blade crank-arm as directed in Step 26. In the event that the arms are correctly adjusted and the specified simultaneity is not attained, instructions for corrective adjustment will be provided by an S&C factory service specialist.

Step 37

After satisfactory group operation has been attained manually, ad.just the switch operator for electrical operation as described in S&C Instruction Sheet

719-500.

Step 38

Operate the Circuit-Switcher several times with the switch operator and observe the action. Operation directions, with the drive-shaft crank of each pole-unit coming to rest in a positive-toggle position.

Step 41

as

follows:

(a) Remove and discard the hex nuts which run the length of the container.

(b)

Remove and discard the %"--16X%" and two washers which attach the upper container-half to the coupling end casting of the interrupter.

Also

remove and discard the three %"16X7/"' and two washers which attach the upper container-half to


If the optional shunt-trip device has been specified, the control wiring for the shunt-trip solenoids should be connected to the terminal block in the switch operator at this time. See S&C

Instruction Sheet 71 1-600.

Step 39

Opening of the interrupters of the three pole-units under switch operator power should be simultaneous within 1.0 cycle (0.016 second). Check for this simultaneity by slowly opening the Circuit-Switcher (by manually cranking the switch operator). Listen for the tripping action of the individual interrupters, and

(c) 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.

(d) Now remove and discard the %""16X%" hex-head cap screw and flat washer which attach the

lower

container-half to the coupling end casting of the and flat washer which attach the lower container-

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.

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S&C ELECTRIC


COMPANY

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Instruction Sheet 711-520 [English, 2 MB, 12/16/1991]

INSTRUCTIONS

Field Assembly and Installation

General

Power Operation

Basis of Fault-Closing Ratings

as

Manual Operation

as

Also,

as

Mounting of Circuit-Switchers

so

Seismic Withstand Capability

as

Inspection Schedule and Procedures

Checking the Shipment

should not be interchanged

their

removal f o r installation

the

insulators.

6.

Interrupter Target

3),

never

Gas-Pressure Indicator

SHUNT-TRIP DEVICE

but the units

be

left in their boxes until installation

25.

DO NOT INTERMIX COMPONENTS

FROM DIFFERENT INSTALLATIONS

not

2,”

PIERCING SET SCREWS

on19

T---h-!

not

29

as

as

not

gearbox

not

as

SHEET

S&C Circuit-Switchers

V

35

as

(b)

Also

so

lower

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TLM612RCUP

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2000 Series

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TTR6

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2000 Series