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In this tutorial for mechanic-electrician students in their second year, learn about measuring systems like electromagnetic, electrodynamic, and ferrodynamic systems. Understand their constructions, functions, properties, and applications. Enhance your knowledge in electrical engineering with detailed explanations and visual aids.
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Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Mechanic - electrician Topic: Basicsofelectricalengineering the2nd. year Measuringsystem 2 Prepared by: Ing. Jiří Smílek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
Measuring systems • Electromagnetic system – rotary iron • Construction: • Inside the coils are placed two blades • fixed • moving • The moving blade is attached to a handle
Electromagnetic system – rotating iron blade; • Principal function: • Mutual stresses exerted of two ferromagnetic materials in a magnetic field • When the current passes through the coil it creates a magnetic field that repels the blades from each other • Application: • Measures DC and AC currents and voltages
Electromagnetic systems – rotating iron blade; • Properties: • Simplicity • Operationally safe construction • Large short-term overload • Measures DC and AC • Easily extend the range with an inverter - MTP/MTN • Mark:
Measuring systems • Electrodynamic system • Construction: • Inside the solid core coil is positioned a moving coil • The moving coil is attached to a handle • The fixed coil is divided into two parts – a larger homogenous field
Electrodynamic system • Principal function: • Mutual electrodynamic stresses of the currents of both coils • The magnetic field coil creates motion torque • Mp = k I1 I2 • Application: • Measuring current and voltage – DC and AC • Performance measurement
Electromagnetic system – rotating iron blade; • Properties: • Small sensitivity • Large consumption • The influence of foreign fields – magnetic shielding • Mark:
Measuring system • Ferrodynamic system • Construction: • Eletrodynamic systemwitha ferromagnetic core coil of sheet metal of silicon and steel.
Electrodynamic system • Principal function: • Same as electrodynamic system • Ferromagnetic coreincreasessensitivity • Application: • Measurement of AC power
Ferodynamic system • Properties: • Greater sensitivity • Less consumption • Measures power output <1W • Mark:
Activities for students - questions • Name the well-known measuring systems • Describe the construction 1. system • Describe the principal function 1. system • Draw the mark on the measuring device 1. system • Name the applications of the system 1. system
Activities for students - questions • Describe the construction 2. system • Describe the principal function 2. system • Draw the mark on the measuring device 2. system • Name the applications of the system 2. system • Compare systems 2 and 3
Bibliography • Mužík, J. Management ve vzdělávání dospělých. Praha: EUROLEX BOHEMIA, 2000. ISBN 80-7361-269-7. • Operační program Vzdělávání pro konkurenceschopnost, ESF 2007 – 2013. • Available at: http://www.msmt.cz/eu/provadeci-dokument-k-op-vzdelavani-pro-konkurenceschopnost • Electrical Measurement textbooks– Ing. Pavel Vylegala SŠE Ostrava, 2006 • Electrical Measurement textbooks– SNTL, 1981
