Eaton VCP-W Series Instructions For Installation/operation/maintenance/servicing

Also see for 120VCP-W25: Installation, operation and maintenance Instructions for installation, operation and maintenance

Contents

48Instruction Booklet IB131006ENEffective March 2019Instructions for installation,operation, and maintenance of typeVCP-W vacuum circuit breakersEATON www.eaton.com6. Inspection, maintenance, and trouble-shooting6.1 Introductionm WARNING· DO NOT WORK ON A BREAKER ELEMENT WITH PRIMARY POWERAPPLIED.· DO NOT WORK ON A BREAKER ELEMENT WITH SECONDARY CONTACTSCONNECTED.· DO NOT WORK ON A BREAKER ELEMENT WITH SPRINGS CHARGED ORCONTACTS CLOSED.· DO NOT DEFEAT ANY SAFETY INTERLOCKS.· DO NOT LEAVE MAINTENANCE TOOL IN THE SOCKET AFTER CHARGINGTHE CLOSING SPRINGS.· DO NOT STAND LESS THAN ONE METER AWAY FROM THE BREAKERELEMENT WHEN TESTING FOR VACUUM INTEGRITY.FAILURE TO FOLLOW ANY OF THESE INSTRUCTIONS MAY CAUSE DEATH,SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. SEE SECTION 2 - SAFEPRACTICES - FOR MORE INFORMATION.6.2 Frequency of inspection and maintenancePeriodic inspections and associated maintenance are essential tothe safe and reliable operation of VCP-W vacuum circuit breakerelements. The inspection frequency and associated maintenancerecommended are intended to insure the best possible ongoingservice. It is imperative that an established schedule be followed.To establish an exact schedule for a specific installation, use thefollowing guidelines.1. Customers such as utilities having extensive experience withpower distribution components should schedule their inspectionand maintenance intervals using well established best practicesin their industry.2. All other customers should use the following guidelines as goodconservative practice:a. For installations defined as normal service conditions perIEEE C37.20.2 and considered clean, non-corrosive environ-ments, inspect, and maintain each circuit breaker every 500operations or 10 years, whichever comes first. If it is deter-mined after completing the “Inspection and maintenanceprocedures” in section 6.3 of this manual that the breakeris still like new based on visual inspection and performance,then the next maintenance interval shouldn’t exceed 500operations or 10 years from the date of the inspection.b. For special conditions such as frequent circuit breakerelement operation, contaminated environments, and hightemperature/humidity conditions, the inspection frequencyshould be a minimum of twice per year.3. Fault interruptions have the greatest impact on contact erosioninside of the vacuum interrupters. Circuit breakers that havebeen subjected to 15 full rated fault interruptions should beimmediately inspected and the schedule for inspection andmaintenance should be re-evaluated based upon the inspec-tion results. Additionally, because of the variability of systemfault characteristics, if there are any customer uncertainties inthe records of the magnitude, duration, or other fault details,increased inspection frequency should be considered.4. Follow the steps presented in paragraph 6.3 entitled “Inspectionand Maintenance Procedures” for scheduled programs.5. Create and maintain a dated permanent record of all inspections,maintenance performed, actions taken, observations made,and measurements taken. Not only will this provide valuablehistorical information, it can help to establish whether or not thepresent schedule needs to be adjusted.6. Perform ongoing visual inspections, when possible, of all equip-ment on a regular basis. Be alert for an accumulation of dirtin and around the circuit breaker elements, loose hardware ordiscolored insulation.For assistance in establishing or updating a detailed inspection andmaintenance schedule for a specific application, please contact yourlocal Eaton representative.Eaton’s vacuum interrupters are tested to exceed the minimum faultinterruptions as required by IEEE/ANSI and IEC Standards withoutinspection. Please contact your local Eaton representative if youwould like a copy of the life curve of the vacuum interrupters in yourspecific circuit breakers.In addition to the instructions in this instruction book, Eaton hascreated a visual tool to assist maintenance personnel. ContactEaton for the Visual Instruction Booklet Essentials (VIBE) which isan interactive PDF with embedded videos to show how to performmany common types of field testing and part replacements.6.2.1 Qualified personnelFor the purpose of operating this type of equipment, only individualsthoroughly trained in the operation of power circuit breakers andassociated equipment, and having knowledge of connected loadsmay be considered to be qualified.Refer to further definitions in the National Electrical Safety Code.For the purpose of inspecting and maintaining such equipment,a qualified person must also be trained in regard to the hazardsinherent to working with electricity and the proper way to performsuch work. Such an individual should be able to de-energize, clear,and tag circuits in accordance with established safety practices. Inaddition, these individuals should have access to and be trained inthe use of protective equipment, such as rubber gloves and flashclothes.All personnel should be familiar with and understand the materialpresented in this instruction manual and other related manuals.