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Tutorial: Mechanic - electrician Topic: Basics of electrical engineering the 2nd. year Measuring system 2 Prepared by: Ing. Jiří Smílek Projekt Anglicky.

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Presentation on theme: "Tutorial: Mechanic - electrician Topic: Basics of electrical engineering the 2nd. year Measuring system 2 Prepared by: Ing. Jiří Smílek Projekt Anglicky."— Presentation transcript:

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2 Tutorial: Mechanic - electrician Topic: Basics of electrical engineering the 2nd. year Measuring system 2 Prepared by: Ing. Jiří Smílek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

3  Electromagnetic system – rotary iron Construction: Inside the coils are placed two blades fixed moving The moving blade is attached to a handle

4  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

5  Properties: Simplicity Operationally safe construction Large short-term overload Measures DC and AC Easily extend the range with an inverter - MTP/MTN Mark:

6  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

7  Principal function: Mutual electrodynamic stresses of the currents of both coils The magnetic field coil creates motion torque M p = k I 1 I 2  Application: ◦ Measuring current and voltage – DC and AC ◦ Performance measurement

8  Properties: Small sensitivity Large consumption The influence of foreign fields – magnetic shielding Mark:

9  Ferrodynamic system Construction: Eletrodynamic system with a ferromagnetic core coil of sheet metal of silicon and steel.

10  Principal function: ◦ Same as electrodynamic system ◦ Ferromagnetic core increases sensitivity  Application: ◦ Measurement of AC power

11  Properties: Greater sensitivity Less consumption Measures power output <1W Mark:

12  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

13  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

14  Mužík, J. Management ve vzdělávání dospělých. Praha: EUROLEX BOHEMIA, ISBN  Operační program Vzdělávání pro konkurenceschopnost, ESF 2007 –  Available at: konkurenceschopnosthttp://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


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