Eaton VR+ Series Instruction Book

Contents

24 Instruction Book IB182923EN September 2018 www.eaton.comAMH-4.76-VR+VR-Series+ Replacement Circuit BreakerSECTION 6: INSPECTION & MAINTENANCEm DANGERDO NOT WORK ON A CIRCUIT BREAKER IN THE ‘CONNECT’ POSITION.DO NOT WORK ON A CIRCUIT BREAKER WITH SECONDARYDISCONNECTS ENGAGED.DO NOT WORK ON A CIRCUIT BREAKER WITH SPRINGS CHARGED ORCONTACTS CLOSED.DO NOT DEFEAT ANY SAFETY INTERLOCKS.DO NOT LEAVE MAINTENANCE TOOL IN THE SOCKET AFTER CHARGINGTHE CLOSING SPRINGS.STAND AT LEAST ONE METER AWAY FROM THE CIRCUIT BREAKER WHENTESTING FOR VACUUM INTEGRITY.m DANGERFAILURE TO FOLLOW ANY OF THESE INSTRUCTIONS MAY CAUSE DEATH,SEVERE PERSONAL INJURY, EQUIPMENT DAMAGE AND/OR IMPROPEROPERATION. SEE SECTION 2 - SAFE PRACTICES FOR MORE INFORMATION.6.1 INSPECTION FREQUENCYThe scheduled maintenance interval for the VR-Series+ circuitbreaker is once every ten years or ten thousand operations,whichever comes first when applied in normal applications asdefined by IEEE C37.04-1999. However, if the circuit breaker isoperating in a high level of natural elements or in a corrosiveenvironment, inspection should be performed twice each year. Thecircuit breaker should also be inspected and a vacuum interrupterintegrity test performed (Section 6.3) any time the circuit breaker istransported to another physical location or switchgear assembly. Inaddition, the circuit breaker should have a full inspection if the circuitbreaker interrupts a fault current.otte:N Rtftr to tht tablt btlow for mainttnanct and insptction chtckpoints.6.2 INSPECTION AND MAINTENANCE PROCEDURESNO. / SECTION INSPECTION ITEM CRITERIA INSPECTION METHOD CORRECTIVE ACTION IF NECESSARY1. Insulation Stand Off Insulators, Operating Rods,Tie-Bars and BarriersNo dirt Visual check Clean with lint-free clothNo cracking Visual check Replace cracked unitVacuum Integrity Between main circuit withterminals ungroundedWithstand27kV 60Hz for 1 MinuteHi-pot Tester Clean and retest or replaceInsulation Integrity Main circuit to ground Withstand15kV, 60Hz for 1 Minute(5kV Rating)27kV, 60Hz for 1 Minute(8.25kV and 15kV Ratings)Hi-pot Tester Clean and retest or replaceControl circuit to ground(Charging Motor disconnected)Withstand1125V, 60Hz for 1 MinuteHi-pot Tester Clean and retest or replace2. Power Element Vacuum Interrupter Assembly Contact erosion visibility Visual - Close the circuit breakerand look for “T” cutout on VacuumInterrupter Assembly(See Figure 6.1 and 6.2)If cutout is not visible, replace VacuumInterrupter AssemblyContact wipe visible Visual (Figure 6.1 and 6.2) Replace Vacuum Interrupter AssemblyAdequate vacuum See Section 6.3 Replace Vacuum Interrupter AssemblyIf vacuum is not adequateDirt on ceramic body Visual check Clean with dry lint-free clothPrimary Disconnects No burning or damage Visual check Replace if burned, damaged or eroded3. Control Circuit Parts Closing and tripping devicesincluding disconnectsSmooth and correct operation bycontrol powerTest closing and tripping of the circuitbreaker twiceReplace any defective device -Identify per Trouble-Shooting ChartWiring Securely tied in proper place Visual check Repair or tie as necessaryTerminals Tight Visual check Tighten or replace if necessaryMotor Smooth and correct operation bycontrol powerTest closing and tripping of the circuitbreaker twiceReplace brushes or motorTightness of hardware No loose or missing parts Visual and tightening with appropri-ate toolsTighten or reinstate if necessary4. Operating Mechanism Dust or foreign matter No dust or foreign matter Visual check Clean as necessaryDeformation or excessive wear No excessive deformation or wear Visual and operational Remove cause and replace partsManual operation Smooth operation Manual charging closingand trippingCorrect per Trouble-Shooting Chartif necessaryCloSure™ Test > 0.6 inch over travel CloSure™ Test 6.8.1 If < 0.6 Contact the PBCat 1-877-276-9379otte:N Contact Eaton for any mtchanism mainttnanct othtr than adjustmtnt or rtplactmtnt of control compontnts.BOLT SIZE 8 - 32 10 - 32 .25 - 20 .31 - 18 .38 - 16 .50 - 13TORQUE Lbs. In. 24 36 72 144 300 540