Электромонтажные инструменты.
1. Пройдите по ссылке.
2. Ознакомьтесь с предложенным материалом.
3. Составьте презентацию одного из инструментов на английском языке.
https://en.wikipedia.org/wiki/Category:Electronics_work_tools
Тема № 6 Personal protective equipment (PPE).
Средства индивидуальной защиты (СИЗ).
1. Прочитайте текст со словарем.
2. Составьте план текста.
Safety equipment and supervisor instructions at a construction site
Personal protective equipment (PPE) refers to protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injuryor infection. The hazards addressed by protective equipment include physical, electrical, heat, chemicals, biohazards, and airborne particulate matter. Protective equipment may be worn for job-related occupational safety and health purposes, as well as for sports and other recreational activities. "Protective clothing" is applied to traditional categories of clothing, and "protective gear" applies to items such as pads, guards, shields, or masks, and others.
The purpose of personal protective equipment is to reduce employee exposure to hazards when engineering controls and administrative controls are not feasible or effective to reduce these risks to acceptable levels. PPE is needed when there are hazards present. PPE has the serious limitation that it does not eliminate the hazard at the source and may result in employees being exposed to the hazard if the equipment fails.
Any item of PPE imposes a barrier between the wearer/user and the working environment. This can create additional strains on the wearer; impair their ability to carry out their work and create significant levels of discomfort. Any of these can discourage wearers from using PPE correctly, therefore placing them at risk of injury, ill-health or, under extreme circumstances, death. Good ergonomic design can help to minimize these barriers and can therefore help to ensure safe and healthy working conditions through the correct use of PPE.
Practices of occupational safety and health can use hazard controls and interventions to mitigate workplace hazards, which pose a threat to the safety and quality of life of workers. The hierarchy of hazard controls provides a policy framework which ranks the types of hazard controls in terms of absolute risk reduction. At the top of the hierarchy are elimination and substitution, which remove the hazard entirely or replace the hazard with a safer alternative. If elimination or substitution measures cannot apply, engineering controls and administrative controls, which seek to design safer mechanisms and coach safer human behavior, are implemented. Personal protective equipment ranks last on the hierarchy of controls, as the workers are regularly exposed to the hazard, with a barrier of protection. The hierarchy of controls is important in acknowledging that, while personal protective equipment has tremendous utility, it is not the desired mechanism of control in terms of worker safety.
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Тема № 7 SafetyRules
Техника безопасности при работе с инструментом.
1. Напишите реферат на английском языке.
Тема № 8 Instructions to the tools.
Инструкции, прилагаемые к инструментам.
1. Пройдите по ссылке.
2. Ознакомьтесь с предложенным материалом.
3. Выполните письменный перевод инструкции одной из следующих страниц (6-12стр.)
http://docme.ru/doc/292950/instruction-manual
Тема № 9 Power Sources .
Источники питания.
1. Выполните письменный перевод профессионально-ориентированного текста «Electric Cells» (Агабекян И.П.Английский язык для студентов энергетических специальностей. - Р/Д: Феникс, 2013.-стр.210-213)
2. Составьте глоссарий профессиональных терминов.
Тема № 10 Transformers.
Трансформаторы .
1. Выполните письменный перевод профессионально-ориентированного текста.
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2. Создайте презентацию на одну из тем: Выпрямители. Двухтактный усилитель. Соединения. Предохранители. Индукция и самоиндукция. Фильтры.
Transformer
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic field, which in turn induces a varying electromotive force (emf) or "voltage" in a second coil. Power can be transferred between the two coils through the magnetic field, without a metallic connection between the two circuits. Faraday's law of induction discovered in 1831 described this effect. Transformers are used to increase or decrease the alternating voltages in electric power applications.
Since the invention of the first constant-potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electrical energy. A wide range of transformer designs is encountered in electronic and electric power applications. Transformers range in size from RFtransformers less than a cubic centimeter in volume to units interconnecting the power grid weighing hundreds of tons.
Types
Various specific electrical application designs require a variety of transformer types. Although they all share the basic characteristic transformer principles, they are customized in construction or electrical properties for certain installation requirements or circuit conditions.
· Autotransformer: Transformer in which part of the winding is common to both primary and secondary circuits, leading to increased efficiency, smaller size, and a higher degree of voltage regulation.
· Capacitor voltage transformer: Transformer in which capacitor divider is used to reduce high voltage before application to the primary winding.
· Distribution transformer, power transformer: International standards make a distinction in terms of distribution transformers being used to distribute energy from transmission lines and networks for local consumption and power transformers being used to transfer electric energy between the generator and distribution primary circuits.
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· Phase angle regulating transformer: A specialized transformer used to control the flow of real power on three-phase electricity transmission networks.
· Scott-T transformer: Transformer used for phase transformation from three-phase to two-phase and vice versa.
· Polyphase transformer: Any transformer with more than one phase.
· Grounding transformer: Transformer used for grounding three-phase circuits to create a neutral in a three wire system, using a waye-delta transformer, or more commonly, a zigzag grounding winding.
· Leakage transformer: Transformer that has loosely coupled windings.
· Resonant transformer: Transformer that uses resonance to generate a high secondary voltage.
· Audio transformer: Transformer used in audio equipment.
· Output transformer: Transformer used to match the output of a valve amplifier to its load.
· Instrument transformer: Potential or current transformer used to accurately and safely represent voltage, current or phase position of high voltage or high power circuits.
· Pulse transformer: Specialized small-signal transformer used to transmit digital signaling while providing electrical isolation, commonly used in Ethernet computer networks as 10BASE-T, 100BASE-T and 1000BASE-T.
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