Eaton Cutler-Hammer W-VAC Instructions For Installation, Operation And Maintenance

I.B. 3A74791H04Page 26Effective 7/97SECTION 6: INSPECTION, MAINTENANCEAND TROUBLESHOOTING6-1 INTRODUCTION• 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 THESE INSTRUC-TIONS MAY CAUSE DEATH, SERIOUS BODILYINJURY, OR PROPERTY DAMAGE. SEE SECTION 2-SAFE PRACTICES FOR MORE INFORMATION.6-2 FREQUENCY OF INSPECTION ANDMAINTENANCEPeriodic inspections and associated maintenance areessential to the safe and reliable operation of W-VACVacuum Circuit Breakers. The inspection frequency andassociated maintenance recommended are intended toinsure the best possible ongoing service. It is imperativethat an established schedule be followed. To establishan exact schedule for a specific installation, use the fol-lowing guidelines: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 break-er operation, contaminated environments, and hightemperature/humidity conditions, the inspection fre-quency should be twice a year.3. Inspect a circuit breaker every time it interrupts faultcurrent.4. Follow the steps presented in Paragraph 6-3 entitled“Inspection and Maintenance Procedures” for sched-uled programs.5. Create and maintain a dated permanent record of allinspections, maintenance performed, actions taken,observations made, and measurements taken. Notonly will this provide valuable historical information, itcan help to establish whether or not the presentschedule needs to be adjusted.6. Perform ongoing visual inspections, when possible,of all equipment on a regular basis. Be alert for anaccumulation of dirt in and around the circuit break-ers, loose hardware or discolored insulation.6-2.1 QUALIFIED PERSONNELFor the purpose of operating switchgear equipment andassociated circuit breakers, only individuals thoroughlytrained in the operation of power circuit breakers andassociated equipment, and having knowledge of con-nected loads may be considered to be qualified. Referto further definitions in any applicable codes.For the purpose of inspecting and maintaining suchequipment, a qualified person must also be trained inregard to the hazards inherent to working with electricityand the proper way to perform such work. Such an indi-vidual should be able to de-energize, clear and tag cir-cuits in accordance with established safety practices. Inaddition, these individuals should have access to and betrained in the use of protective equipment, such as rub-ber gloves and flash clothes.All personnel should be familiar with and understand thematerial presented in this instruction manual and otherrelated manuals.6-2.2 HELPFUL TOOLS AND ACCESSORY ITEMSTo simplify the performance of inspection and mainte-nance programs, the items described in Section 3-5 arerecommended.6-2.3 GENERAL TORQUE GUIDELINESBolts and screws must be properly torqued. This isespecially true if parts and/or accessories are added orreplaced. Table 6.1 provides guidelines on torque lev-els. The table is intended as a general guideline and! WARNING