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each break jaw (Fig 12).  Avoid any lubrication on 
insulation. 
 
Failure to regularly lubricate the break jaws may result 
in the failure of the switch to properly open or close. 
 

 

Lubricant 

Fig. 12

 

Break Jaw Lubrication 

 
 

Section 6 - Bolt Tightness for Connections to 
Terminal Pads 

 
Use the following torque value for tightening bus joints. 
 

Note: This table is for bus connections only.  Use 
the special torque values listed in the respective 
sections for the main blades. 

 
 
 

Torque Values in Foot-pounds for  
Bolt Diameter 
 

Diameter, 

inches 

.25 .31 .38 .5

.6

Nominal Torque 

25 

50 

65 

 

Page 10 

Summary of Contents for LBS Series

Page 1: ...age Disconnect Switch rated 7 2kV Fig 1 Typical LBS Switch with Auxiliary Fuse Compartment Read and understand these instructions before attempting any Installation Operation or Maintenance of an LBS...

Page 2: ...to 7200 volts and may be supplied with or without fuses A Type LBS switch without fuses is capable of closing under fault conditions and interrupting magnetizing and load currents but is not intended...

Page 3: ...the work to be performed the safety equipment required and hazards involved Read and understand these instructions before attempting any assembly operation or maintenance of an LBS switch Disconnect a...

Page 4: ...respectively This can be checked by closing the switch and then partially opening it using the maintenance hub as described in Section 5 1 3 c In the closed position the drive rod links and shaft ears...

Page 5: ...the LBS switch Refer to the specific order drawings for a description of operation for these interlock schemes when provided 4 2 Switch Operation CAUTION Attempting to operate an LBS Switch with a key...

Page 6: ...TENANCE An LBS switch should be thoroughly inspected prior to initial energizing Every 100 operations or yearly thereafter a cursory inspection to clean lubricate and check for signs of wear and tear...

Page 7: ...not overtighten To verify that the mounting bracket bolt has not been overtightened push the flicker blade to the rear It should rebound smoothly Fig 7 Use of Maintenance Hub 5 1 4 Interphase Barrier...

Page 8: ...insure smooth operation of the switch To align the blades and jaw after one or both have been replaced follow the procedure below Loosen the four hinge bolts and the two break jaw bolts Insert the rem...

Page 9: ...erminal pad and finger tighten the four bolts Align the blade per paragraph 5 2 3 Tighten the jaw and hinge mounting bolts Lubricate per Sec 5 4 Align flicker blade and arc chute per paragraph 5 2 4 C...

Page 10: ...12 Break Jaw Lubrication Section 6 Bolt Tightness for Connections to Terminal Pads Use the following torque value for tightening bus joints Note This table is for bus connections only Use the special...

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