INSTRUCTIONS For Field Assembly and Installation

Transcription

1 S&C Line-Rupters" Outdoor Transmission (115 kv through 230 kv) I For Line and Cable Switching INSTRUCTIONS For Field Assembly and Installation ITABLE OF CONTENTS I Section Page Number Section Page Number INTRODUCTION... 1 INSTALLING THE INTERPHASE SHAFT BEFORE STARTING INSTALLATION....3 INSTALLING THE OPERATOR....,15 ASSEMBLY OF INDIVIDUAL POLE-UNITS FINAL CHECKS AND ADJUSTMENTS I INTRODUCTION 1 The equipment covered by this publication must be selected for a specific application and it mustbe 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 (erection) and installation of S&C Line-Rupters. See Figure 1. The S&C Line-Rupter employs an in-series circuitbreaking interrupter and a circuit-making and isolating disconnect, making it especiallysuited for line and cable switching; specifically, load splitting (parallel or loop switching), load dropping, and line and cable dropping. Line-Rupter is capable of closing, carrying, and interrupting load currents and parallel loop or currents, as well as line- and cable-charging current. Line-Rupters utilize the time-proven reliability of the S&C Circuit-Switcher's brain and in-series interrupter, combined in a compact, economical, minimummaintenance switching package. Line-Rupter interrupters are economically tailored for specific applications by employing the precise number of interrupting gaps required. Each pole-unit of the S&C Line-Rupter 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. Line-Rupters can be manually operated by means of an S&C Manual Geared Operating Handle. Alternately, for remote supervisory control, power operation can be provided with an S&C Switch Operator-Type LS-2. For manually operated Line-Rupters, the degree of simultaneity of opening and closing of the three poleunits 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 Line-Rupters S&C Line-Rupters are intended for upright mounting on S&C Mounting Pedestals or, alternately, for upright mounting on the user's steel pedestals or supporting structures which must meet specific static deflection limits shown in an S&C data sheet. The weight of the bus plus any associated ice load exerts a vertical force on upright-mounted Line-Rupter terminal pads. This vertical force must not exceed 400 pounds on either terminal pad. Seismic Withstand Capability S&C Line-Rupters, when installed with the recommended S&C Mounting Pedestals and anchor bolts, are capable of withstanding seismic loading of 0.2 ground Supersedes lnstructlon Sheet dated '1991 INSTRUCTION SHEET S&C COMPANY ELECTRIC Page 4 Chicago 1 of 17 S&C ELECTRIC CANADA LTD. Toronto December 16,1991

2 S&C Line-Rupters Outdoor Transmission (115 kv through 230 kv) INTRODUCTION - Continued I For Line and Cable Switching I 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 Line-Rupter s continued proper performance, it should be inspected in accordance with S&C s recommended schedule and procedures contained in S&C Instruction Sheet Since the Type LS-2 Switch Operator is provided with a convenient means for decoupling it from the Line- Rupter, elective exercising of the operator may be performed at any time without requiring an outage or switching to an alternate source. 3 4-r I. ---I--I d-n* ~:-III~IIS: mnnuallv aaerated. and mounted on S&C Figure 1. S&C Line-Rupter ratea I 13 KV nommal, IL alllperv:rr GVIIIIIIL---, r-.----, Mounting Pedestals ~s~~ucm0N SHEET Page 2 of 17 December 16,199l S&C ELECTRIC COMPANY Chicago S&C ELECTRIC CANADA LTD. Toronto

3 IBEFORE STARTING INSTALLATION 1 Checking the Shipment An S&C erection drawing will be found in a waterresistant envelope attached to the interrupter container on one of the three Line-Rupter pole-units. Study the erection drawing carefully and check the bill of material to be sure all parts are at hand. The Line-Rupter shipment should include the following items, as shown in Figure 2: 1. Three pole-units, each mounted on a skid, with the live parts attached directly to the insulatormounting flanges; Insulators, shipped in separate crates; Miscellaneous operating-mechanism components including a temporary adapter for hand operation of the individual pole-units; Interphase and vertical operating pipe; An S&C Manual Geared Operating Handle (if specified) or an S&C Switch 0perator"Type LS-2 (if specified, in place of a manual geared operating handle); S&C Mounting Pedestals (if Interrupter Target Line-Rupters are usually shipped with the interrupters in the open position. Therefore, the interrupter target, located on the side of each brain housing (see Figure S), 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). Whenin service, Line-Rupter interrupters should never be open when the blades are in the closed position. To close the interrupters, Line-Rupter must be completely opened and then reclosed. Gas-Pressure Indicator Line-Rupters 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-pressurc indicator at the terminal end of each interrupter. See Figure 2. A gray target indicates normal pressure. DO NOT INTERMIX COMPONENTS FROM DIFFERENT INSTALLATIONS S&C maintains an historical record-by serial number-of every Line-Rupter 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 modifkations or replacements. It is important, therefore, that the various components belonging to a specific Line-Rupter installation not be intermixed with components belonging to a different installation. For this reason, each Line-Rupter 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 manual geared operating handle (or to the switch operator if the Line-Rupter is power operated). To facilitate identification during erection, the serial number, the sales-order number, and the erection-drawing (ED) number are marked on the top face of each Line-Rupter pole-unit base; on each pole-unit shipping crate or skid; and on all crates, boxes, and bundles for the other components associated with the installation. Please complete and mail the Line-Rupter registration card (enclosed in the water-resistant envelope) after the Line-Rupter has been installed. The information requested on this card is vital to ensure prompt notification in the event field modifications are needed. INSTRUCTION SHEET 752m500 S&C ELECTRIC COMPANY Chicago Page 3 of 17 S&C ELECTRIC CANADA LTD. Toronto December 16,1991

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13 I INSTALLING THE INTERPHASE SHAFT step 22 Note: The base-mounted open stop bolt for each poleunit drive lever is factory-adjusted to achieve the travel (and positive-toggle condition) necessary to ensure positive latching of the stored-energy source within the brain. Do not change this stop adjustment. Install the interphase shaft as follows: (a) Remove the clamps from the interphase-shaft drive lever and from the three pole-unit drive levers. See Figure 12 for identification. (b) Place the interphase shaft in the saddles of the three pole-unit drive levers (positioned as shown on the erection drawing), but do not attach the clamps at this time. (c) Place the interphase-shaft drive lever against the interphase shaft. Mark the lever position on the shaft. See Figure 12 (top). Rotate the outboard bearing to swing the interphase-shaft drive lever into a position in which the clamp can be easily reattached. Lift the interphase shaft of out the poleunit saddles and place it in the saddle of the interphase-shaft drive lever-at the previously marked position. See Figure 12 (center). Attach the interphase-shaft drive lever clamp and securely tighten the clamp bolts equally so that the clamp pulls down evenly. Then tighten the clamp s piercing set screw, piercing the pipe, and continue turning until a firm resistance is felt. Again rotate the outboard bearing and, at the same time, lift the interphase shaft back into the saddles of the three pole-unit drive levers. In that position, tightenin the manner described above-the now accessible piercing set screw in the intephase-shaft drive lever. (d) Make sure that all three pole-unit drive levers are against their base-mounted stops (each pole-unit drive linkage is then in a positive-toggle condition). Also make sure that the outboard bearing lever is in the switch-open position, with the stop bolt set for approximately 3 degrees of over-center travel-to provide positive toggle at this point as well. Then reinstall the clamps on the three poleunit drive levers. Tighten the clamp bolts equally so that the clamps pull down evenly. See Figure 12 (bottom). Do not, hmuever, tighten the piercing set screws for the pole-unit drive directed in Step 27. levers until so INSTRUCTION SHEET ELECTRIC S&C COMPANY Page Chicago 13 of 17 ELECTRIC S&C CANADA LTD. Toronto December 16,1991

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17 ~~~~ ~ ~~ ~ I FINAL CHECKS AND ADJUSTMENTS - Continued lies against its stop bolt in a positive-toggle condition, and the blade crank-arm at the top of each brain makes contact with its stop. See Step 11. If this is not the case, it will be necessary to isolate the poleunit(s) affected by loosening the clamp which fastens the pole-unit drive lever to the interphase shaft. Then, for each affected pole-unit, proceed as follows: (a) Loosen the four bolts fastening the brain to the rotating insulator stack. (b) Insert the %"-13X2%" positioning bolt through the tab and the stop bushing at the brain mounting flange and fasten securely, as described in Step 3. (c) Place the pole-unit drive lever against its stop bolt and tighten the clamp at the interphase shaft. Then tighten the four bolts which fasten the brain to the rotating insulator stack. (d) Remove the positioning bolt installed (b) above. If the above conditions are not met, contact the nearest S&C Sales Office for corrective instructions. Step 27 When operatiov is satisfactory, tighten the piercing set screws at all three pole-unit drive levers, piercing the pipe, and continue turning until a firm resistance is felt. Then verify that the clamp bolts and piercing set screws at all locations are fully tightened. Step 28 Crank the Line-Rupter to its fully open position and then to its fully closed position. In each position, set the corresponding "OPEN" and "CLOSED" position indicators at the output shaft of the manual geared operating handle (or at the output shaft of the switch operator). Step 29 If the S&C Manual Geared Operating Handle is furnished with an auxiliary switch, catalog number suffix "-Q" or "-W," it will be mounted inside the operating-handle enclosure, alongwith a terminal block for user's connections. See Figure 13. Each auxiliaryswitch contact is operated by a cam-actuated roller. A contact is closed if its roller is disengaged from a cam and, conversely, a contact is open if its roller is engaged by a cam. The cams are individually adjustable in 4.5-degree increments. Adjustment of the cams is accomplished as follows: (a) Raise (or lower) the cam toward its adjacent spring until the cam is separated from the teeth of the inner gear. See Figure 14. (b) Rotate the cam to advance or retard engagement with its roller. (c) Lower (or raise) the cam making sure that the teeth are in mesh with the inner gear. Step 30 Connect high-voltage conductors to their respective Line-Rupter terminal pads. Conductors must be de-energized and grounded in accordance with standard system operating practice. Step 31 Remove the container from each interrupter as follows: Remove and discard the Yi""16 zinc-plated serrated hex nuts which run the length of the container. Remove and discard the YLif-l6X7/S" and two %"-16X1" 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 three 3/S"-l6X%" and two %"-16X1" zinc-plated hex-head cap crews and flat washers which attach the upper container-half to the indicator end casting of the interrupter. Pry the cor.tainer-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. Now remove and discard the 3/8"-16X7/g" hex-head cap screw and flat washer which attach the lower container-half to the coupling end casting of the interrupter, and the 3/""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. Finally, remove and discard the foam-core inner liner wrapped around the iuterrupter. Now remove the shield for the pressure-relief device. step 32 Please complete and mail the Line-Rupter registration card! The information requested on this card is vital to ensure prompt notification in the event field modifications are needed. I INSTRUCTION SHEET S&C ELECTRIC 17 COMPANY Page Chicago of 17 S&C ELECTRIC LTD. CANADA Toronto December 16,1991 *