Eaton 380 VCP-Wind Instructions For The Use, Operation And Maintenance

Contents

I.B. 70A2580H02 Page 25Effective November 2012SECTION 6: INSPECTION, MAINTENANCEAND TROUBLESHOOTING6-1 INTRODUCTIONWARNING• DO NOT WORK ON A CIRCUIT BREAKER IN THE“CONNECTED” POSITION.• DO NOT WORK ON A CIRCUIT BREAKER WITHSECONDARY DISCONNECTS ENGAGED.• DO NOT WORK ON A CIRCUIT BREAKER WITHSPRINGS CHARGED OR CONTACTS CLOSED.• DO NOT DEFEAT ANY SAFETY INTERLOCKS.• DO NOT LEAVE MAINTENANCE TOOL IN THESOCKET AFTER CHARGING THE CLOSINGSPRINGS.• DO NOT STAND LESS THAN FOUR METERSAWAY FROM THE BREAKER WHEN TESTINGFOR VACUUM INTEGRITY.FAILURE TO FOLLOW ANY OF THESEINSTRUCTIONS MAY CAUSE DEATH, SERIOUSBODILY INJURY, OR PROPERTY DAMAGE. SEESECTION 2-SAFE PRACTICES FOR MOREINFORMATION.6-2 FREQUENCY OF INSPECTION ANDMAINTENANCEPeriodic inspections and associated maintenance areessential to the safe and reliable operation of VCP-WindCircuit Breakers. The inspection frequency andassociated maintenance recommended are intended toinsure the best possible ongoing service. It is imperativethat an established schedule be followed. To establish anexact schedule for a specific installation, use thefollowing guidelines: (Customers having extensiveexperience should schedule their inspection andmaintenance intervals using best practices in theirindustry)1. In a clean, non-corrosive environment, inspect andmaintain each circuit breaker annually or every 500operations, which ever comes first.2. For special conditions such as frequent circuit breakeroperation, contaminated environments, and hightemperature/humidity conditions, the inspectionfrequency should be twice a year.3. Inspect a circuit breaker every time it interrupts faultcurrent.4. Follow the steps presented in Paragraph 6-3entitled “Inspection and Maintenance Procedures”for scheduled programs.5. Create and maintain a dated permanent record ofall inspections, maintenance performed, actionstaken, observations made, and measurementstaken. Not only will this provide valuable historicalinformation, it can help to establish whether or notthe present schedule needs to be adjusted.6. Perform ongoing visual inspections, whenpossible, of all equipment on a regular basis. Bealert for an accumulation of dirt in and around thecircuit breakers, loose hardware or discoloredinsulation.For assistance in establishing or updating a detailedinspection and maintenance schedule for a specificapplication, please contact your local Eatonrepresentative.6-2.1 QUALIFIED PERSONNELFor the purpose of operating switchgear equipmentand associated circuit breakers, only individualsthoroughly trained in the operation of power circuitbreakers and associated equipment, and havingknowledge of connected loads may be considered tobe qualified. Refer to further definitions in theNational Electrical Safety Code.For the purpose of inspecting and maintaining suchequipment, a qualified person must also be trained inregard to the hazards inherent to working withelectricity and the proper way to perform such work.Such an individual should be able to de-energize,clear and tag circuits in accordance with establishedsafety practices. In addition, these individuals shouldhave access to and be trained in the use of protectiveequipment, such as rubber gloves and flash clothes.All personnel should be familiar with and understandthe material presented in this instruction manual andother related manuals.6-2.2 HELPFUL TOOLS AND ACCESSORY ITEMSTo simplify the performance of inspection andmaintenance programs, the items described in Section3-5 are recommended.6-2.3 GENERAL TORQUE GUIDELINESBolts and screws must be properly torqued. This isespecially true if parts and/or accessories are addedor replaced. Table 6.1 provides guidelines on torquelevels. The table is intended as a general guidelineand should be applied in conjunction with theexperience and good judgment of the individual.