Report of committee on electrical equipment maintenance. Electrical distribution and control systems are the heart of any facility, yet it is often the most underappreciated utility. A preventive maintenance checklist for electrical distribution systems in commercial buildings. Systems and equipment covered are typical of those installed in industrial plants, institutional and commercial buildings, and large multifamily. Low voltage switchgear inspection, maintenance and testing.
As 24671981 maintenance of electrical switchgear sai. Every year, electrical fires result in hundreds of deaths, thousands of injuries and hundreds of millions of dollars in property damage. Where applicable, additional suggested practices are presented for a more thorough epm program. If the switchgear or electrical distribution assets been damaged or seems off, theres probably a reason why. In north america, rely on vertivs electrical reliability services to deliver the most complete solutions for electrical system. Warning failure to observe the electrical clearances specified in the table and illustrated in the diagrams on this page may result in electrical arc. Electrical distribution services electrical distribution. Property damage andor physical injuries due to electrical fires can be devastating. Disconnect all low voltage and medium voltage power sources to the switchgear assembly before working on the equipment. Clean all ceramic materials of loose dirt and examine. Low voltage circuit breaker maintenance and secondary. Andrew once such work has started, then it should not be possible for someone to reconnect the supply accidentally to the associated system or plant. Read and understand these instructions before attempting installation, operation, or maintenance of the switchgear assembly.
Select pdf to download and print selected portions of this handbook. Switchgear and circuit breakers failures and case studies. The principles formulated in the standard, especially those concerning the safety of personnel, are for the most part also applicable to equipment operated at the higher voltages. Switchgear maintenance means performing a mandatory outage to conduct maintenance. Systems and equipment covered are typical of those installed in industrial plants, institutional and commercial buildings, and large. As 24672008 maintenance of electrical switchgear sai global. Since 1960, sf6 sulfur hexafluoride is used in electrical equipment switchgear and devices and also in other applications like arc furnaces, window insulation, car tires and sport shoes. Embassy djibouti rev1 page 5 section 1 the schedule 1. The electrical switchboard and all its equipment continue to age. Abbs mediumvoltage switchgear portfolio helps protect and control electrical equipment in commercial, industrial and utility applications worldwide. An infrared, or thermographic, inspection should be performed at least once every three years on all switchgear, distribution panels, cable and bus connections.
Recommended practice for electrical equipment maintenance nfpa 70b details preventive maintenance for electrical, electronic, and communication systems and equipment such as those used in industrial plants, institutional and commercial buildings, and large multifamily residential complexes to prevent equipment failures and worker injuries. Osburn bureau of reclamation hydroelectric research and technical services group denver, colorado 5f. Maintenance and troubleshooting guidelines for a typical. Instructions for installation, operation, and maintenance of.
Maintenance for switchgear power systems preventative maintenance is the key in keeping the system working properly. Its vital to your operations, but also dangerous and costly. Electrical preventive maintenance of air circuit breakers. This document is prepared in line with australian standard asnzs 2467.
Electrical engineers that perform maintenance, cleaning, testing, repair, and infrared inspection of indoor and outdoor switchgear. Introduction of indoor switchgear advantages and limitations of indoor switchgear. A mini project report on operation and maintenance of 2202kv substation submitted in partial fulfillment for the award of the degree of bachelor of technology in electrical and electronics engineering submitted by v. We service electrical circuit breaker panels and panelboards, motor control centers, fused disconnect switches, electrical switches, and all other types of electrical equipment. With your download, get the 23 best papers relevant to this one, including 17 top related papers. Switchgear maintenance lakeland, florida 33810 tel. As 24671981 maintenance of electrical switchgear sai global. Typical retrofit switchgear application sensor selection guideline rfct one for every cableset in or out coupling capacitors one set for every 3 structures rfct. If it is necessary to use cleaning solvents, use only solvents recommended by the manufacturer. Iec603646 requires initial and periodic verifications of electrical installations. Describes a recommended practice for the maintenance of electrical switchgear having rated voltages not greater than 145 kv. 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. Switchboard installation and maintenance manual dir 510. Electrical clearances check for proper electrical clearances as described in recommended clearances.
This guide is designed for maintenance managers responsible for the health and performance of ed installations. Ask questions so that you never put yourself in an uncomfortable situation. It is recommended that every year all of the circuit breakers, disconnect points, and switches be manually worked and tested to make sure they are functioning smoothly. Frequency of maintenance testing guide electrical power is the pulse of your plant. Since 1989, revised editions of the maintenance testing specifications have been published in 1993, 1997, and 2001. This pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists.
Recommended practice for electrical equipment maintenance nfpa. Standard for testing specifications electrical power. Drawout contacts on the circuit breaker and the stationary contacts in the cubicle should be cleaned and inspected for overheating, alignment, and broken or weak springs. Instructions for installation, operation, and maintenance of 5. Direct access to supply original spare parts for both active and discontinued mv and lv equipments. As 24672008 maintenance of electrical switchgear sai. Standard for maintenance testing specifications for. For more information on the possibilities offered by conditional maintenance, contact schneider electric services.
Although switchgear failures are rare, testing and maintenance is. To provide highest value and minimized effort of maintenance to customers, different maintenance practices from reactive in case of sudden failure to. Field guide for inspection, evaluation and maintenance criteria for electrical substations and switchgear this handbook summarizes procedures and guidance to air force electricians for the inspection, evaluation, and maintenance of substations, switchgear, and associated devices. Genuine magnum ds switchgear accessories and replacement parts improve the reliability, safety and longevity of the. Fist 41b, maintenance scheduling for electrical equipment 5c. Ensure that the connectors are properly used and installed in accordance with manufacturers specifications. A regular maintenance schedule should be established to obtain the best service and reliability from the switchgear. Necessary maintenance procedures for switchgear power. Safe operation and maintenance of circuit breakers and. When you fail to conduct the proper maintenance, the risk of loss.
To develop suitable texts relating to preventive maintenance of electrical systems and equipment used in industrialtype appli. 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. Electrical preventive maintenance epm program electrical related fires are a common occurrence. The switchgear preventative maintenance checklist shows what type of maintenance should be performed to keep electrical equipment in proper working order. Modernize and extend the life of magnum ds lowvoltage switchgear. The basic function of the switchgear is to control, protect and isolate electrical equipment.
Furnish materials, labor, and equipment in accordance with. Electrical switchgear and power distribution systems such as mns or mns is require permanent maintenance for technical and economic reasons. It also includes all devices associated with control, metering and regulating of electrical power systems. Basic maintenance should include, mechanical and electrical operational tests, contact travel tests, resistance of primary circuit tests, cleaning primary insulation and checking substation batteries.
Maintenance and troubleshooting guidelines for a typical high. Switchgear should be cleaned, inspected, tightened. Before conducting visual maintenance switchgear protective measures should be set in place. Standard for an electrical preventive maintenance epm program page 210 andor connectors are used together, examine connections for signs of galvanic action.
Learning the basics k001ac 40 high power medium voltage and low voltage switchgear k002ac 41. Safe operation and maintenance of circuit breakers and switchgear. To a certain extent, conditional maintenance reduces the recommended. As part of this project, startup services will be performed on the electrical distribution and control equipment as specified. Vacuum interrupters design applications and limitations. 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.
Electrical distribution maintenance fundamentals 8 electrical distribution maintenance services guide 2015 2. Technical specification for startup and commissioning of. Electrical distribution maintenance services guide schneider. Introduction low voltage electrical switchboards are at the heart of power distribution in a modern building where there is increased. Iec 619361hd 637 s11 operation of electrical equipment. Assembly of such devices in a logical manner forms switchgear. Recommended practice for electrical equipment maintenance. Metalenclosed ac switchgear for rated voltages 1 kv up to including 52 kv. Electrical power aparatus, such as transformers, regulators. The checklists are in pdf format and can be completed electronically or printed and used as hard copy. This will minimise the risk offjy injury or breakdown and the consequent human suffering andor loss of supply. The manufacturers recommendations should be addressed, together with the recommendations of as2467 in a plannedthe recommendations of as2467, in a planned preventative maintenance programme. Instructions for installation, operation, and maintenance.
International electrical testing association, 2017. In 2005, this document was approved for the first time as an american national standard. Below is a list of items to work on a general preventative maintenance to get the ball rolling. Standard for an electrical preventive maintenance epm. Ms28 handbook maintenance of electrical switchgear tl4. Facilities instructions, standards, and techniques. Switchgear preventive maintenance checklist career trend.
In other words systems used for switching, controlling and protecting the electrical. 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. The first neta maintenance testing specifications for electrical power equipment and systems was published in 1975. Technical fundamentals courses reference page electrical fundamentals elearning electrical distribution fundamentals s009ac 39 electricity. Standard for an electrical preventive maintenance epm program. We would like to show you a description here but the site wont allow us. Clean all insulating materials with vacuum andor clean lint free rags. Preventive maintenance contract scope of work for electrical. This keeps the contacts clean and helps operating mechanisms move freely. Preventive maintenance checklist for electrical distribution. The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. A switchgear is a generic term which includes all the switching devices associated with power system protection.
Division 26, electrical, covers the work necessary for the complete electrical system. Preventive maintenance of electrical distribution switchgear, base year 1 each use reverse andor attach additional sheets as necessary 25. Iec 62271200 the locally applicable accident prevention, operating and work instructions assembly and maintenance. At many facilities, the maintenance crews take only some of the easier steps. Performing testing of earthing a 66kv circuit prior to the sheath test. Electrical distribution maintenance fundamentals 6 2. Maintenance and troubleshooting guidelines for a typical high voltage switchgear on photo. Division 26, electrical, as well as electrical work pertaining to other divisions. Sf6 is used in electrical equipment because of its dielectric strength, excellent insulating properties and its arcsuppression capabilities. The checklists are intended to help inspectors keep track of the numerous aspects of an electrical installation. Hanover risk solutions standard for an electrical preventive.
When your electrical assets fail, profits and people can suffer. Coat contact surfaces with contact lubricant to ease mating see manufacturers recommendations. However, experience shows this is an economic dance with the devil. Typical retrofit switchgear application sensor selection guideline rfct one for every cableset in or out coupling capacitors one set for every 3 structures. Standard for acceptance testing specifications for electrical power equipment and systems. Switchgear maintenance is usually considered a low priority by most management teams, who defer or ignore it until a failure occurs. En 5011011 1 the national standards applicable in the country where the equipment is. What does a good electrical maintenance program look like. Maintenance of low voltage switchgear electrical installation guide.
Operations and maintenance manualswitchboards and switchgear. Minimum operating time to clear a fault in order to avoid damage to equipment. Metalenclosed switchgear 15kv 25kv 38kv inspection. Preventative maintenance for switchgear and electrical. Oct 28, 2016 switchgear maintenance is essential for continued reliable operation. Sf6 is used in electrical equipment because of its dielectric. The pdf files for these documents may be downloaded from the. The term switchgear is a generic term that includes a wide range of switching devices like circuit breakers, switches, switch fuse units, offload isolators, hrc fuses, contactors, miniature circuit breakers, elcbs, gfcis etc. Learn about the magnum ds, front access and arcresistant lowvoltage switchgear designs. This specification is intended as a part of the electrical. Without a reliable source of electrical power, operations of any facility would not be possible.
Substations and switchgear in an electrical system perform the functions of voltage transformation, system protection, power factor correction metering, and circuit switching. Nfpa 70e standard for electrical safety in the workplace electrical arc, flash, and blast. It can help you discover, understand, adopt, and manage the bene. Apply an antioxidant compound to all aluminumto copper connections. Switchgear and switchboard inspection and testing guide.
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