Eaton LBS Series Installation, Operation And Maintenance Manual

Contents

PURPOSEThis instruction book is expressly intended to cover theoperation and maintenance of LBS load interrupterswitches. It does not purport to cover all possiblecontingencies, variations, and details that may ariseduring operation or maintenance of this equipment.If further information is desired regarding this product,contact the local Cutler-Hammer sales office.TABLE OF CONTENTS PageSection 1 - Introduction.1.1 Basic Description and Application 31.2 Switch Identification 31.3 Safety Features 31.4 Safe Practices 4Section 2 - Receiving, Handling and Storage2.1 Receiving 42.2 Handling 42.3 Storage 4Section 3 – Inspection Before Startup 4Section 4 - Operation4.1 Mechanical Safety Interlocks 54.2 Switch Operation 64.3 Fuse Replacement 7Section 5 - Maintenance5.1 Inspection Procedure 75.2 Alignment Procedures 85.3 Replacement Procedures 95.4 Lubrication 10Section 6 Hardware Torque Chart 11For the location of your nearest Cutler-Hammerdistributor, call toll free 1-800-525-2000SECTION 1 - INTRODUCTION1.1 Basic Description and ApplicationThe Type LBS switch is a three-pole, manuallyoperated, quick-make, quick-break switch available inboth 600 ampere and 1200 ampere continuous ratings.This device is used primarily as a disconnect switch inAC power systems with maximum voltages up to 7200volts and may be supplied with or without fuses.A Type LBS switch without fuses is capable of closingunder fault conditions and interrupting magnetizing andload currents, but is not intended to interrupt faultcurrents. When supplied with fuses, a Type LBS switchmay be used to provide fault protection up to theinterrupting rating of the fuses. Refer to Table 1 forratings.LBS Switch RatingsDescriptionCont. andBreakCurrentFault-Close(un-fused)Short-time (2sec)CurrentFusedInterruptingRating(Symm)Switch with internalfuses (450E max@5kV, 350Emax @ 7.2kV)600A 40kA 25kA 50kASwitch with 600Eand 750E fuses(5kV max)1200A 61kA 38kA 40kASwitch with 1100Eand 1350E fuses(5kV max)1200A* 61kA 38kA 31.5kAUnfused (7.2kVmax) 1200A 61kA 38kA N/A*1200A rating is for NEMA 1 enclosure with vented covers.NEMA 3/12 rating (without vents) is 1000A.Table 1 RatingsEach Type LBS switch is designed for operation in anenclosure and should not be operated under load withthe enclosure door open.1.2 Switch IdentificationA rating nameplate is located on the handle coverplate(behind the handle access door) of each type LBSswitch. Contained on this nameplate are the switchtype and ratings as required by industry standards. Aunit nameplate located near the upper left corner of themedium voltage door contains the factory’s generalorder number. This number should be given to theCutler-Hammer Sales Office if a question should ariseconcerning the switch or if renewal parts are required.DANGER!Page 2