If the switchgear is to be stored, inspect it to make sure the shipment is complete and. However, equipment failure can be delayed through appropriate electrical preventive maintenance. Metalclad switchgear field taping procedure 515 kv. There are many standards on the subject pertaining to different voltage levels of switchgear, which normally defines four separate aspects of maintenance, with each new stage based on the preceding one, inspection, servicing, examination and.
Switchgear testing and commissioning procedure busbar torque test. If the switchgear is to be stored, inspect it to make sure the shipment is complete and undamaged. These complex procedures may affect ed equipment performance after intervention e. Medium voltage switchgear specification page 1 medium voltage metal clad switchgear part 1 general. Data from nfpa 70e, electrical safety in the workplace, 2009. Maintenance programs generally need to be planned on a customerspecific basis. Repack it so it will be protected until it has been installed. Maintenance of mv switchgear, transformers, ring main units. Download dara documents, switchgear maintenance procedure. Electrical distribution and control systems are the heart of any facility, yet it is often the most underappreciated utility. These verification procedures, intended to maintain systems or their subassemblies in correct operating condition over the targeted service life. Airports company soc ltd invites tenders for the maintenance of mv switchgear, transformers, ring main units and minisubstation at or tambo international airport. The vacuum circuit breaker is widely used in porcelain housed circuit breakers and metal clad switchgear. Proper transportation and correct storage of the switchgear.
Maintenance and troubleshooting guidelines for a typical high. Installation operation maintenance technical instructions no. Maintenance of mv switchgear, transformers, ring main. Disconnect all low voltage and medium voltage power sources to the switchgear assembly before working on the equipment. Electrical switchgear safety a guide for owners and users this is a webfriendly version of leaflet indg372rev1, published 04 introduction this guidance is for owners and operators of electrical switchgear in industrial and commercial organisations with little electrical knowledge or expertise available inhouse. Type vfi, oilinsulated switchgear installation, operation. The following suggestions are for use in conjunction with the manufacturers instruction books for the. Medium voltage service medium voltage service maintenance. Before any installation work is performed, thoroughly read and understand the material in this instruction. Osha safety procedures as well as commonly accepted safe working practices. Electrical equipment deterioration is normal and equipment failure is inevitable. The switchgear preventative maintenance checklist shows what type of maintenance should be performed to keep electrical equipment in proper working order. At many facilities, the maintenance crews take only some of the easier steps. Standard for an electrical preventive maintenance epm program page 210 andor connectors are used together, examine connections for signs of galvanic action.
Verify all maintenance and service clearances are maintained verify no physical damage verify voltage and current rating of circuit breaker are per plans and specifications project. This pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists. Electrical distribution maintenance services guide schneider. Amt not 05602 edition 122009 with sf 6 gas switchgear medium voltage distribution.
Maintenance and troubleshooting guidelines for a typical. Instructions for installation, operation, and maintenance. Standard for an electrical preventive maintenance epm. Sep 28, 2018 you can find below a comprehensive switchgear testing and commissioning procedure. Scope of work electrical switchgear service american embassy. Since 1989, revised editions of the maintenance testing specifications have been published in 1993, 1997, and 2001. The united states embassy in suva, fiji is seeking contractor proposals to perform preventive maintenance, inspections, testing, and training, on the facilitys existing electrical distribution switchgear. Home technical articles inspection, test and measurement procedures for lv and mv up to 36kv switchgears importance of checks and maintenance installed in clean, well ventilated or airconditioned locations, switchgear will require little routine maintenance.
Low voltage switchgear maxsg installation and maintenance manual index 1. Maintenance of electrical switchgear ms28, tl4 11 chapter 1 introduction 110 purpose 111 scope this handbook contains information on safety practices and environmental considerations when working on switchgear, descriptions of typical classes of switchgear, and preventive and corrective maintenance guidelines for switchgear. The first neta maintenance testing specifications for electrical power equipment and systems was published in 1975. The checklists are in pdf format and can be completed electronically or printed and used as hard copy. In 2005, this document was approved for the first time as an american national standard. Switchgear testing and commissioning procedure electrical. Select pdf to download and print selected portions of this handbook. Reduction in maintenance costs direct costs connected to emergency maintenance management, indirect costs connected to production losses switchgear working trend over time based on the maintenance adopted strategy upgrade or retrofit solutions repair risk and conditionbased maintenance no maintenance time performance and reliability. The course also highlights training, safety considerations and provides practical. Before conducting visual maintenance switchgear protective measures should be set in place. To provide highest value and minimized effort of maintenance to customers, different maintenance practices from reactive in case of sudden failure to. Medium voltage switchgear specification page 1 medium voltage metal clad switchgear part 1 general 1.
Switchgear maintenance is usually considered a low priority by most management teams, who defer or ignore it until a failure occurs. Switchgear maintenance lakeland, florida 33810 tel. Switchgear and switchboard inspection and testing guide. Disconnect all low voltage and medium voltage power sources to the switchgear assembly before working on the equipment per the occupational safety and health act osha and lockout procedures. Instructions for installation, operation, and maintenance of 5. Safe operation and maintenance of circuit breakers and. Abb vacuum circuit breaker switchgear vd4 maintenance. Because of their reliable reputation, they also can be the most overlooked element in the whole power control system. The dara operations and maintenance manual for switchboards and switchgear document covers the procedures and recommendations for the maintenance of low voltage electrical switchboards and switchgear.
Medium voltage distribution pix schneider electric. Report of committee on electrical equipment maintenance. Abb vacuum circuit breaker switchgear vd4 maintenance cement plant part2. Safe operation and maintenance of circuit breakers and switchgear. Aug 07, 20 maintenance procedure for substations and switchgear general the maintenance of the switchgear and electrical equipment can be carried out safely and efficiently through the following steps. Inspection, test and measurement procedures for lv and mv up.
Standard for an electrical preventive maintenance epm program. This document covers the procedures and recommendations for the maintenance of low voltage electrical switchboards and switchgear. It is necessary that all testing tools are available before starting the work. Where the maintenance of electrical equipment is carried out especially inside switchrooms, a notice giving instructions on treatment of a person suffering from electric shock should be affixed and first aid equipment should be made available for the treatment of personnel. Therefore at least following tools shall be arranged before starting the electrical testing job. Tambo international airport ort 1012017 tender notice and invitation to bid t1. After installation of the switchboards, all the bus bar bolts are torque tested as per manufacturers recommendations with a torque wrench. Vfi switchgear is designed for outdoor mounting on a concrete pad. Variances only are required when an alternative practice, procedure, or schedule does not meet.
Personnel working in, on or around this equipment must also exhibit common sense and good judgment regarding the potential hazards. Notice the personnel responsible for installing, operating, and servicing this equipment should be thoroughly familiar with the contents of this manual. Maintenance of power circuit breakers internet version of this manual created december 1999 hydroelectric research and technical services group the appearance of the internet version of this manual may differ from the original, but the contents do not united states department of the interior bureau of reclamation denver, colorado. The perfect and safe operation of this switchgear is conditional on. It is compactly designed for high reliability, safe operation, and easy maintenance. In the context of hv switchgear, the procedures to select and maintain suitable. The common procedure is to follow the producer recommendation for the. Apply an antioxidant compound to all aluminumto copper connections. Switchgear switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment.
The switchgear assembly is secured on a true and level surface according to the floor plan of the customer drawings. Standard for testing specifications electrical power. Sf6 equipment maintenance, repair, and replacement and. Electrical engineers that perform maintenance, cleaning, testing, repair, and infrared inspection of indoor and outdoor switchgear. This workshop explains typical switchgear maintenance, configurations and arrangements, typical problems encountered in the field and means of extending the life of hvmv switchgear. Instruction for installation, operation and maintenance of. Electrical switchgear and power distribution systems such as mns or. The integrity of the vacuum chamber is often tested by applying a test voltage across the open contacts of. Only tenderers that satisfy the eligibility criteria as stated elsewhere in this document can tender. No physical damages to switchgear and all connected cables.
Operations and maintenance manualswitchboards and switchgear. Download dara documents, switchgear maintenance procedure dara. Instructions for installation, operation, and maintenance of. Seeing when high voltage switchgear maintenance is needed english pdf article. Inspection, test and measurement procedures for lv and mv. Energy reduction maintenance setting erms switch powerzone 4 low voltage metalenclosed drawout switchgear during daytoday operation and maintenance of low voltage drawout switchgear, circumstances may exist where work must be done within the limited approach boundary of energized conductors or components. Powervac maintenance and troubleshooting suggestions introduction observing the following practices will save time, effort and frustration, as well as prevent possible damage to equipment and injury to personnel. The main objective of abb maintenance programs is to optimize the functionality of the existing switchgear. Electrical inspection checklists this pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists. However, experience shows this is an economic dance with the devil. Switchgear preventive maintenance checklist career trend. Switchgear testing, maintenance and cleaning powercom. Medium voltage service medium voltage service maintenance by abb.
Pioneer and technology leader driving gis innovations. In the fall of 1967 the board of directors of the national fire protection av soeiation authorized the formation of an ad hoe committee on electrical equipment maintenance to determine the need for the development of a suitable document on this subject. Installation and low voltage switchgear maintenance manual. A regular maintenance schedule should be established to obtain the best service and reliability from the switchgear. Today, the vacuum circuit breaker is regarded as a highly reliable current interruption technology, especially for medium voltage switchgear. Oct 28, 2016 this guide provides a general overview for the inspection, testing and maintenance techniques used on switchgear and switchboard assemblies, and their associated components. Ensure that the connectors are properly used and installed in accordance with manufacturers specifications. Instruction for installation, operation and maintenance of 38. Medium voltage switchgear construction checklist page 2 of 6 version 0206 switchgear information equipment tag location system circle one power or lighting 208120 or 480277 normal or emergency manufacturermodel number serial number short circuit capacity voltsphase rating main bus amperage service area other comments. British standards can be obtained in pdf or hard copy formats from.
Pdf intelligent switchgear maintenance system researchgate. If the switchgear is going to be installed as soon as it has been received, unpack it and handle it according to the procedure outlined in the following paragraphs. Deadfront construction minimizes the highvoltage safety. The best strategy to increase the plant availability is an optimized combination of scheduled, selective and prepared maintenance activities. Inspection, testing and commissioning of electrical. We service electrical circuit breaker panels and panelboards, motor contr. Preventive maintenance checklist for electrical distribution. Gasinsulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuitbreakers and disconnectors, which can be safely operated in confined spaces. Low voltage switchgear service maintenance electrical switchgear and power distribution systems such as mns or mns is require permanent maintenance for technical and economic reasons. Type vfi switchgear provides fault interruption and convenient load switching for 15, 25, and 35 kv underground systems. Antoine, caniff, midtown, goss and cato gis substations were a significant source of sf6 emissions leaks and intensive maintenance itc has replaced 4 of the 5. Scope of work electrical switchgear service american embassy suva, fiji i. Necessary maintenance procedures for switchgear power systems. Ms28 handbook maintenance of electrical switchgear tl4.
Gas insulated switchgear gis replacement project acquired five inservice gis sites manufactured between 1970 and 1972manufactured between 1970 and 1972 st. Switchgear maintenance means performing a mandatory outage to conduct maintenance. Disconnect all low voltage and medium voltage power sources to the switchgear assembly before working on the equipment per occupational safety and health act osha and lockout procedures. Power is fed to and from the switchgear from underground through openings in the pad. Before attempting to do any maintenance, always be sure to deenergize both the primary and secondary circuits. Maintenance of low voltage switchgear electrical installation guide. A preventive maintenance checklist for electrical distribution systems in commercial buildings. Operation and maintenance of a gas insulated substation.
Operations and maintenance manual switchboards and switchgear. Scope of work electrical switchgear service american. Maintenance of 2 kv switchgear free download as powerpoint presentation. Pdf the paper describes advanced technique for the switchgear condition. Necessary maintenance procedures for switchgear power. Read and understand these instructions before attempting installation, operation, or maintenance of the switchgear assembly. Without a reliable source of electrical power, operations of any facility would not be possible. Electrical switchgear and power distribution systems such as mns or mns is require permanent maintenance for technical and economic reasons. Switch gear service and maintainnance safety measures and requirements i a thorough site risk assessment to be done before commencement of work. Observance of operating and installation instructions. Switchgear power systems are very reliable and rarely need maintenance at all.
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