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    S&C Instruction Sheet 761-505

Introduction

Qualified Persons

 WARNING

Only qualified persons who are knowledgeable in the installation, operation, and 
maintenance of overhead and underground electric distribution equipment, along 
with all associated hazards, may install, operate, and maintain the equipment 
covered by this publication. A qualified person is someone who is trained and  
competent in:
•  The skills and techniques necessary to distinguish exposed live parts from nonlive 

parts of electrical equipment

•  The skills and techniques necessary to determine the proper approach distances 

corresponding to the voltages to which the qualified person will be exposed

•  The proper use of special precautionary techniques, personal protective  

equipment, insulated and shielding materials, and insulated tools for working on 
or 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  
procedures for this type of equipment.

Read this  

Instruction Sheet

NOTICE

Thoroughly and carefully read this instruction sheet and all materials included in 
the product’s S&C Instruction Handbook before installing or operating your S&C 
Alduti-Rupter Switch. Familiarize yourself with the Safety Information and Safety 
Precautions on pages 4 through 6. The latest version of this publication is available 
online in PDF format at 

sandc.com/en/support/product-literature/.

Retain this  

Instruction Sheet

This instruction sheet is a permanent part of your S&C Alduti-Rupter Switch. Designate 
a location where you can easily retrieve and refer to this publication. 

Proper Application

 WARNING

The equipment in this publication is only intended for a specific application. The 
application must be within the ratings furnished for the equipment. Ratings for the 
Alduti-Rupter Switch are listed in the ratings table in Specification Bulletin 761-31. 
The ratings are also on the nameplate affixed to the product. 

Summary of Contents for Alduti-Rupter

Page 1: ...s 2 Read this Instruction Sheet 2 Retain this Instruction Sheet 2 Proper Application 2 Warranty 3 Warranty Qualifications 3 Safety Information Understanding Safety Alert Messages 4 Following Safety In...

Page 2: ...or such qualified persons They are not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment Read this Instruction Sheet NOTICE Thoroughly an...

Page 3: ...are those stated in Price Sheet 150 or Price Sheet 153 and THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ANY EXPRESS WARRANTY OR OTHER OBLIGATION PR...

Page 4: ...ecautions are not followed NOTICE NOTICE identifies important procedures or requirements that can result in product or property damage if instructions are not followed Following Safety Instructions If...

Page 5: ...age Description Part Number A DANGER Electrocution Hazard G 6580 1 B WARNING Piercing Set Screws G 3176R1 C WARNING Handle Operation G 4400R5 D WARNING Electrocution Hazard Grounding Strap G 6596 This...

Page 6: ...lothing in accordance with safe operating procedures and rules 4 SAFETY LABELS AND TAGS Do not remove or obscure any of the DANGER WARNING CAUTION or NOTICE labels Remove tags ONLY if instructed to do...

Page 7: ...sections and one tubular fiberglass insulating section in the vertical operat ing shaft S4 Insulated interphase sections and one Cypoxy Insulator unit in the vertical operating shaft S6 Key interlock...

Page 8: ...lly Closed position during installation of the interphase and vertical operating pipe sections S C recommends tying the switch blades to their jaw contacts with wire or a cable tie WARNING DO NOT lift...

Page 9: ...tch poles and bell crank base s or bracket s from their crates and arrange them on the ground in the same order in which they will be mounted on the pole or structure Protect the bearings from contami...

Page 10: ...g on the live parts Avoid allowing the switch poles to swing while lifting Lifting the switch by the live parts will damage the switch Rough handling may cause damage to the blades and contacts Failur...

Page 11: ...ndue strain on the insulators and throwing the blades out of alignment resulting in difficulties operating the switch Use shims as required STEP 6 Lift or hoist the bell crank assembly including baseo...

Page 12: ...ert the operating pipe section into the coupling and finger tighten the clamp bolt s 3 Adjust the operating pipe to the correct length Then tighten the clamp bolt s to final tightness 4 Tighten the pi...

Page 13: ...nk is mounted outboard of the switch poles Install the pipe section connecting the driven arm of the bell crank to the nearest switch pole See Figure 12 If two bell cranks are used in a double offset...

Page 14: ...ipe sections furnished is threaded at one end to accommodate the operating handle assembly See Figure 13 Install this section of pipe last with the threads at the lower end If only one vertical operat...

Page 15: ...guide arm pointing upward at a 45 degree angle See Figure 15 A positioning stud is furnished that holds the rod guide at 45 degrees Follow the directions in Installing Pipe Couplings with Piercing Set...

Page 16: ...es an S C Type AS 10 Switch Opera tor as signified by the addition of the standard minor modifica tion suffix S8 or S9 to the erection drawing number for 34 5 kV and 46 kV switches refer instead to S...

Page 17: ...TEP 17 Fasten the free end of the grounding strap to the lowest vertical operating pipe section a few inches above the operating handle assembly with the U bolt connector provided for this purpose See...

Page 18: ...shipping CAUTION The switch should be opened and closed slowly only when checking for alignment and complete closure When opening or closing the switch in service do not slow down or stop part way Ar...

Page 19: ...oosen the clamp bolt on the low est rod guide or bell crank coupling and move the handle to a position less than 20 degrees from the Closed position Then torque the clamp bolt on the lowest rod guide...

Page 20: ...n the locking disc on the operat ing handle See Figure 23 STEP 22 Block one of the two slots in the locking disc with the blocking screw provided The slot to be blocked depends on whether a locked ope...

Page 21: ...sm should lie against its closed stop See Figure 26 c If none of the switch poles are fully closed the effective length of the vertical operating pipe may need to be increased Loosen the vertical oper...

Page 22: ...poles are fully closed readjust the take up screw s on the adjustable pipe coupling s at the switch pole to increase or decrease the effective length s of the interphase operating pipe s See Figure 2...

Page 23: ...Shorten ing the adjustable lever arm increases switch blade travel Then readjust for full operating handle travel as described on page 18 f Repeat this procedure shortening the adjustableleverarmofthe...

Page 24: ...igure 31 NOTICE After readjusting be sure to retighten the locknut on each adjustable pipe coupling take up screw the clamp bolt and piercing set screw on the pipe coupling at the rod guide or bell cr...

Page 25: ...assembly in the fully Closed position verify the minimum clearance between each blade shunt contact and its respective interrupter housing See Figure 33 The shunt contacts may be bent as required to...

Page 26: ...ve engagement with their respective interrupter opening levers as shown in Figure 35 Simultaneity is essential to ensure both interrupters share the interrupting duty The opening lever on one or both...

Page 27: ...tings to the stationary insulators See Figure 37 Shift the terminal base castings as required Tighten the terminal base casting cap screws and recheck for conformance to the conditions outlined above...

Page 28: ...aluminum alloy body connectors the following procedures should be used a Thoroughly wire brush the current transfer surfaces of each connector and immediately apply a liberal coating of Penetrox A av...

Page 29: ...king fault currents STEP 26 Remove the padlock from the locking bar on the operating handle assembly Withdraw the locking bar See Figure 39 a If the operating handle assembly is furnished withakeyinte...

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