Pictorial glossary the pictorial glossary includes definitions and illustrations for many terms that are frequently used in the electrical industry. Erection of earthing arrangements tnc, tns, tncs, tt eep. Watt a unit of measure for indicating the electrical power applied in a circuit. The system will either be tns, tncs pme or tt for a low voltage supply given in accordance with the. Terms that are underlined and italicized are included in the glossary as a separate definition. Part 2 defines the sense in which certain terms are used throughout the regulations, and provides a list of symbols used and a list of abbreviations used in the standard. Understanding of electrical terms is compulsory for engineers. However, if the incoming supplies are at 11kv and the transformers are in the ownership of the user, the lv supplies may. The glossary also defines terms that are used in roofing and electrical work as well. Standard for an electrical preventive maintenance epm program page 210 andor connectors are used together, examine connections for signs of galvanic action. The principles protective multiple earthing pme voltimum. Basic electrical terms and definitions electricalmag.
Terms and conditions ferry electric company electrical. Section 4 third section of chapter 41 protective measure. This agreement details the provision of electrical works. Electrical separation part 1 sets out the scope, object and fundamental principles. Tlc electrical supplies fast online sales of electrical cable, wiring accessories, lighting, heating and security equipment. In the uk, this system is also known as protective multiple earthing pme, because of the. Actuator solenoid the solenoid in the actuator housing on the back of the injection pump which moves the control rack as commanded by the engine controller alternator a device which converts mechanical energy into electrical energy alternating current ac a flow of electrons which reverses its direction of flow at regular intervals in a conductor. In a pme system, the current is returned via the neutral, so if this connection outside the premises is lost for whatever reason, the current is then returned via the earth.
It is obtained by multiplying the current in amperes by the electrical pressure in volts which cause it to flow. Even though the distributor may have provided a pme earthing facility, it is the responsibility of the electrical installation designer to assess its suitability and adequacy, and where necessary an alternative means of earthing, such as a tt system, may need to be used. The choice of earthing system can affect the safety and electromagnetic compatibility of the installation. In an electrical installation, an earthing system uk or grounding system us connects specific. Alternating current ac the type of mains electricity used in the uk having a cyclical current waveform. The intelligent pme measurement system is ideal for use in decentralized measurement applications within the industry, such as production processes with large machinery as well as. Electricity safety, quality and continuity regulations. Electrical installations only read reproductionfor not. It consists of conductors wires connected between the buildings electrical service panel circuit breakers and the electrical outlets power receptacles. Layers near the surface are influenced more by seasonal and shortterm weather. Ensure that the connectors are properly used and installed in accordance with manufacturers specifications.
The electrical earthing is done by connecting the noncurrent carrying part of the equipment or neutral of supply system to the ground. Standard for an electrical preventive maintenance epm. View and download prime pme 50 installation manual online. Ferry electric company electrical contractors 250 curry hollow road, pittsburgh, pa 152364698 412 8922100 fax. Pdf the revised philippine mechanical engineering code. Solutions for electrical contractor services every electrical company and contractor present different needs and expectations. Nov 07, 2011 in a pme system, the current is returned via the neutral, so if this connection outside the premises is lost for whatever reason, the current is then returned via the earth. The proper connection between electrical installation systems via conductor to the buried plate in the earth is known as earth. Pme the industrial measurement signal conditioners linked to a fieldbus. Protective multiple earth pme separate neutral earth. Types of earthing systems used in electrical installations.
Surface or semiburied structures table of contents sce public approved by. The distributor will be able to provide this information. The ability to handle any power requirement is an important component in haworths mission to completely satisfy customers needs. Combined neutral earth cable must comply with the requirements of pme. Almost all new supplies to dwellings will be from pme distribution systems. Pme measurement electronics linked to a fieldbus hbm. If you are seeking an experienced, professional electrical contractor with the capability to service all your lighting, data network and electrical needs, you need look no further than pme projects ltd, based in the buoyant north west. Description download the revised philippine mechanical engineering code free in pdf format. Electronic components usually use currents that are less than 1 amp.
Normally used in uk houses at 240v rms alternating at 50 times per second 50 hertz. A cord would be a cable by this definition so far, but a cable is part of a permanent installation. Ugs sheet underground structures standards effective date. We are pleased to announce the formation of astris pme. The intelligent pme measurement system is ideal for use in decentralized measurement applications within the industry, such as production processes with large machinery as well as for functional and power test stands. A neutral grounded electrical supply system where the neutral serves. The abbreviations ac and dc are often used to mean simply alternating and direct.
Electric current in which the flow of electric charge periodically reverses direction, whereas in direct current dc, also dc, the flow of electric charge is only in one direction. Ac drive an electronic device used to control the speed of an ac motor. By joining forces, pme group and the astris lifecare configured care division are able to combine complementary strengths, industry knowledge, business activities and dynamic resources into one company astris pme. Understanding electricity requires knowledge of these basic electrical terms.
Ammeters are always connected in series with the circuit to be tested. Understanding electrical terms in todays computerintensive work environments, a critical issue is clean, reliable power. This agreement details the provision of electrical works for. Ampere is the basic unit for measuring electrical current. As you study electricity in your engineering program, and as you work with electricity in the power plants, industrial plants, you will hear, read, and use various electrical terms. Information for electrical installers western power distribution. Low voltage earthing policy and application guide sp energy. This synergy will enable expansion and diversification that is dedicated to improving lives of people with a disability. It indicates the amount of work done in an hour by a circuit at a. Standard for an electrical preventive maintenance epm program. If you export the pme connection to an unbonded outhouse with extraneous conductive parts, there. Haworth is the industry leader in furniturebased power solutions. We offer a wide range of solutions for protective relay testing, primary injection testing, secondary injection testing, transformer testing, circuit breaker testing, resistance measurements, switchgear and electrical panels testing, reclosers testing, iec 61850 testing, substations maintenance, and more. The supply neutral conductor, often referred to as a pen combined protective and neutral or cne combined neutral and earth conductor, is.
As shown in fig 1, in a pme arrangement the supply neutral conductor provides the functions of both protective and neutral conductors, and is connected to multiple earthing points on the supply network. Recognized throughout the industry for their exceptional features and longterm value, manual pme models include. Earthing institution of engineering and technology. Mains power supplies and earthing systems in balance energy. Understanding electrical terms your new and used office. Glossary all terms and definitions listed alphabetically. An experienced electrical contractor you can trust.
Halevidis and others published power flow in pme distribution systems during an open neutral condition find, read and cite all the research you need. When designing an electrical installation, one of the first things to determine is the type of earthing system. The point of reference is the earths conductive surface. If the premises are bonded correctly, no raise in potential can happen. Types of earthing systems used in electrical installations custom search the international standard iec60364, part 4, and reference 10 uses a set of diagrams to explain the five basic methods of earthing and providing the neutral of an electrical installation where it is required. Alternating current ac an electric current that reverses its direction many times a second at regular intervals. The process of transferring the immediate discharge of the electrical energy directly to the earth by the help of the low resistance wire is known as the electrical earthing. Compact actuator electrical rotary supplier rotary. Ammeter an instrument for measuring the flow of electrical current in amperes.
Version matrix contrac lme, rsde, pme, rhde, eax, ebx english pdf technical description supplementary information driver contrac profibus dp english pdf technical description application note contrac electrical actuators consideration of the lifecycle cost english pdf application note. Adapter a cord or block style device with different ends that allows different devices to connect ac alternating current. Pme applied water service pipe gas service pipe gas meter metal gas pipe metal water pipe main switch label safety electrical connection do not remove label safety electrical connection do not remove circuit protective conductors electricity company installation main earthing terminal 100a 10mm2 10mm2 16mm2 separate neutral n and. Apply an antioxidant compound to all aluminumto copper connections. One amp is produced by an electric force of 1 volt acting across a resistance of 1 ohm. Pme embraces continuous improvement and therefore strives to keep abreast with the most up to date technology and training available in order to. Electrician certification glossary of terms english spanish. Glossary of urogynecology terms general terms pelvic floor muscles a group of muscles in the pelvis that support and help to control the vagina, uterus, bladder urethra and rectum bladder a muscular organ which stores urine ureters a pair of tubes, each leading from one of the kidneys, to the bladder urethra. Pme70, pme90, pme110, pme, pme50l, pme70l, pme90l, pme110l. Protective multiple earth pme separate neutral earth sne. Cable a cable is a set of wires, usually encased in an outer protective jacket. In an electrical installation, an earthing system uk or grounding system us connects specific parts of that installation with the earths conductive surface for safety and functional purposes. Power flow in pme distribution systems during an open. Typical application of pme to networks with sne and cne cables 15.
The earthing of low voltage networks in the uk is largely determined by the low voltage supplies. A user may not know where to find information that describes the license activation process for pme or enm resolution pme and enm licenses can be activated using both online and offline methods. As the majority of low voltage supplies to both new and existing electrical installations are connected to a pme earthing terminal, this article discusses the operating characteristics of this particular supply arrangement which in its entirety is known as a tn. Protective multiple earthings pme professional electrician. Recognized throughout the industry for their exceptional features and longterm value, manual. We are working for you to keep the power flowing and deal with any problems that come up so you can be sure of a reliable and secure supply at. Pme is committed to sustainable development and as such we measure our performance not only in financial terms, but in how we can continually add value for our customers, employees and community. Pme is a type of earthing arrangement for electrical installations. Pme provides a robust and reliable means of distributing electricity but, under certain faultconditions, a potential can develop between the conductive parts connected to the pme earthing terminal and the general mass of earth. Erection of earthing arrangements tnc, tns, tncs, tt. Theyre right in saying that you should contact your electrical supplier to arrange for a suitable earth, however your installation may possibly be a tt earth rod and the supplier wont do anything as this is a suitable earthing arrangement.
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