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I.B. 48030
Cutler-Hammer
Instructions for Installation, Operation, and Maintenance of
Type LBS Medium-Voltage 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 switch.
Cutler-Hammer
Power Distribution and Assemblies Division
Arden NC 28704
Effective February 2001
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Table of Contents
Related Manuals for Eaton LBS Series
Summary of Contents for Eaton LBS Series
- Page 1 I.B. 48030 Cutler-Hammer Instructions for Installation, Operation, and Maintenance of Type LBS Medium-Voltage 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 switch. Cutler-Hammer Power Distribution and Assemblies Division Arden NC 28704...
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Page 2: Table Of Contents
PURPOSE SECTION 1 - INTRODUCTION This instruction book is expressly intended to cover the 1.1 Basic Description and Application operation and maintenance of LBS load interrupter switches. It does not purport to cover all possible The Type LBS switch is a three-pole, manually contingencies, variations, and details that may arise operated, quick-make, quick-break switch available in during operation or maintenance of this equipment. -
Page 3: Safety Features
familiar with the work to be performed, the safety Exceeding the nameplate ratings of an LBS switch equipment required, and hazards involved. may cause property damage, severe injury, or death. Read and understand these instructions before attempting any assembly, operation, or maintenance of Do not apply an LBS switch beyond its nameplate an LBS switch. - Page 4 With the switch closed, the upper spacers of – SECTION 3 Inspection Before Initial Energizing the main blades should rest 3/16"+/-1/16" of an LBS Switch above the bottom of the depression of the stationary break jaw (see Fig. 4). NOTE! With the switch closed, each main blade Each switch is properly adjusted at the factory before assembly should engage the break jaw such...
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Page 5: Section 4 - Operation
A final thorough inspection should be made to projection are optionally available on the LBS switch. ensure that no tools or other objects have Refer to the specific order drawings for a description of been accidentally left inside the enclosure. operation for these interlock schemes, when provided. -
Page 6: Fuse Replacement
When specified, the Type LBS switch is supplied with Cutler-Hammer Type CLE or HLE current limiting power fuses. Fuse puller, part number 6391D55G01, is supplied with fuses rated 450 amps or less to aid in the insertion and removal of the fuses. Instructions for using the fuse puller are mounted on the inside of the Handle... -
Page 7: Alignment Procedures
Check interphase barriers for carbon or metallic deposits. Replace if deposits are present. Inspect arc chute sides for cracks or erosion and replace if damaged. Use a flashlight to examine the arcing contacts inside the arc chute. If contacts are 5.1.5 Cleanliness check found to be burned or pitted over half of their surface, or if the contacts are out of alignment, the arc chute... - Page 8 In the open position, clearance between the edge of the 5.2.2 Close-Open Stop Adjustment main blade and the break jaw should be 6-5/8” as described in Section 3 and Figure 2. The top stop bolt Remove the handle mechanism cover by removing the bolts securing the cover to the switch frame.
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Page 9: Replacement Procedures
pin. Verify by pushing the assembly back and asymmetrical observing its return to the original position. The elastic stop nut at the hinge end must be tightened to a value of 20 inch-pounds on all switches. Flicker Blade It is critical that the bolts at both ends of the main blade assembly be properly tightened. - Page 10 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.