Eaton MVS Instructional Booklet

Contents

12Instructional Booklet IB02102006EEffective May 2011Type MVS (previously WLImetal-enclosed switchgear4.76 kV, 15.0 kV, 27.0 kV, and 38.0 kVeaton corporation www.eaton.comField insulation methodsMethod 1—using an insulating bootStep 1e: Clean the area of dirt and foreign matter Use a clean, drycloth or, if necessary, dampen slightly with distilled water Do notuse any abrasives or solventsStep 2e: Place the boot over the joint so that it fits in place Fastentogether with plastic wire ties Cut off excess ends of plastic wire tiesMethod 2—using insulating tape and fillerGeneralStep 1e: Elongate the insulating tape 10 to 25% during application toensure a smooth, tight fit On pads, elongate the corners onlyStep 2e: Should a tape roll expire during application, start the newrole by overlapping the previous end by 1/2 turnJoint—no hardwareStep 1e: Clean the area of dirt and foreign matter Use a clean, drycloth or, if necessary, dampen slightly with distilled water Do notuse any abrasives or solventsStep 2e: Apply one turn of 1 00 inch (25 4 mm) tape so that halfof the tape is on the conductor and half is on the pre-insulationOverlap the tape ends 1 50 inches (38 1 mm)Step 3e: Apply one layer of insulating tape, lapping as specified inTable 2, overlapping any pre-insulation by 1 50 inches (38 1 mm)Joint—with hardwareStep 1e: Clean the area of dirt and foreign matter Use a clean, drycloth or, if necessary, dampen slightly with distilled water Do notuse any abrasives or solventsStep 2e: Apply the filler over the bare conductor and hardware tocover and to smooth out the surface Blend the contour into pre-insulation surfaces Cover the conductors and hardware with atleast 0 125 inches (3 18 mm) of fillerStep 3e: Apply pad(s) of insulating tape of sufficient width to overlapthe pre-insulation by 1 00 inch (25 4 mm) or moreStep 4e: Apply one layer of insulating tape, lapping as specified inTable 2, overlapping any pre-insulation or pads by 1 50 inches(38 1 mm)Factory-installed Noryl insulationFactory-installed insulation may be Noryl, a high-performanceengineering thermoplastic It can be irreversibly damaged if itcomes in contact with certain chemicals See page 22 forcleaning procedures WARNINGTHE USE OF SOLVENTS, OILS, JOINT COMPOUNDS, OR GREASES ON ORNEAR NORyL INSULATION WILL DESTROy IT.CLEAN ONLy WITH WATER OR ISOPROPyL ALCOHOL. CAUTIONISOPROPyL ALCOHOL IS FLAMMABLE. PROVIDE ADEQUATE VENTILATIONAND KEEP AWAy FROM FLAMES AND OTHER IGNITION SOURCES.CONSULT yOUR SAFETy DEPARTMENT BEFORE USING.Securing MVS switchgear assemblies to foundationsAll anchoring hardware and necessary devices are to be supplied bythe installer If the switchgear assembly was purchased for seismicapplications, follow the instructions on special drawings providedaddressing the anchoring and load bearing requirements in additionsto the following two sectionsTable 2. Taping ChartMVS kV ratingpre-insulation orpad overlap (Minimum)inches (mm) Lap of tape insulating tapenumber of Layers number of pads4.76 1.50 (38.1) 1/2 1 1Over 4.76 1.50 (38.1) 2/3 2 2