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IB-DR7-A

May, 2012

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Summary of Contents for DR7

Page 1: ...IB DR7 A May 2012 ...

Page 2: ...tall Interphase Rods and Offset Crank Rod 5 Step 10 Install Vertical Operating Pipe 6 Step 11 Install Pipe Splice and Guide Plate 6 Step 12 Install Operating Mechanism 6 Step 13 Arcing Horn Instillation 7 Step 14 Installation of Corona Rings and Balls 8 Step 15 Final Checks 8 Terminal Connections 8 Maintenance 8 Bearings 9 Renewal Parts 10 Lubrication 10 Suggested Tools 15 16 Open End Wrench 15 16...

Page 3: ...nd file a claim immediately with the transportation company and notify your Pascor Atlantic representative HANDLING Handling of disconnect switches should be done with care Porcelain is fragile and may be damaged due to improper handling Factory drawings should be followed during installation It is recommended that switches be fully assembled and adjusted at ground level before being placed into p...

Page 4: ...y contain an additional crank Step 3 Insulator Stack Alignment Lower voltage switches 8 25 thru 72 5kV generally do not require insulator stack alignment Where required the insulator stacks of switches thru 242kV can be aligned using open end shims or leveling screws and or adjusting nuts Fig 1 if supplied optional If using shims place the shims under the insulator supports rotor bearing or spacer...

Page 5: ... tension nor compression in the rod Adjustment may be made by removing the pin at the attachment point of crack and clevis loosening the locknut screwing the clevis in or out to adjust the length until the proper length is obtained The locknut is then tightened and final assembly of the pin is made to attach clevis and crank After this has been accomplished the closed position stop bolt A Fig 5 is...

Page 6: ...forms an angle of approximately 45 degrees with an offset link in either switch position closed or open On 5 base circle switches the multi angle crank is installed on the top of the switch crank on 3 base circle switches it is installed on the bottom Step 9 Install Interphase Rods With all blades in the closed position install the interphase rods and offset crank rod as follows a Lengthen the int...

Page 7: ...on to the offset bearing shaft or on the pole unit rotor bearing in the case of direct connection switches Step 11 Install Pipe Splice and Guide Plate When the length of the vertical operating pipe exceeds 23 feet a pipe splice and a guide plate are furnished and should be installed as shown in Fig 8 The pipe spice and both pieces of pipe are pre drilled to receive the 5 8 diameter pins The guide ...

Page 8: ...its vertical centerline is at or near as possible to the closed position see Fig 8 5 Temporarily fasten the handle to the pipe with the set screws Worm Gear Mechanism 1 With ground strap in place on vertical operating pipe slide worm gear mechanism over the vertical operating pipe and attach it to the structure 2 Remove the small position indicators which are attached to the worm gear coupling wit...

Page 9: ...rminal clamp if available to the aluminum switch terminal pad If a non tinned terminal clamp is used apply a liberal amount of electrical joint grease at the joint and all over the pad of the fitting To connect aluminum to aluminum terminals 1 Clean all contact surfaces of conductors and fittings using a stiff wire brush to remove heavy oxide coatings until the aluminum finish is visible and resto...

Page 10: ...icants are MOBIL 28 grease or NO OX ID A Special MOBIL 28 is an Exxon Mobil Company product NO OX ID is made by SANDCHEM INC 1 ANSI C37 35 American National Standard Guide for the Application Installation Operation and Maintenance of High Voltage Air Disconnecting and Interrupter Switches In general operating linkages require virtually no maintenance However in contaminated atmospheres of where op...

Page 11: ...mps Refer your requests for renewal parts to the Factory Table 2 Lubrication Guide for Outdoor Switch Components Part Name Type Lubricants Recommended Amount Applied Qty Req d for 6 Three pole Switches Jaw Fingers NO OX ID Grade A Special or Mobil 28 Grease Medium Coat Blade Ends NO OX ID Grade A Special or Mobil 28 Grease Medium Coat 1 Quart Pins On current carrying parts Mobil 28 Grease or DC 4 ...

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