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BS EN IEC 60375:2018

BS EN IEC 60375:2018

$167.15

Conventions concerning electric circuits

Published By Publication Date Number of Pages
BSI 2018 44
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IEC 60375:2018 specifies the rules for signs and reference directions and reference polarities for electric currents and voltages in electric networks.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 English
CONTENTS
10 FOREWORD
12 1 Scope
2 Normative references
3 Terms and definitions
20 4 Orientation of geometrical objects
4.1 Orientation of a curve
4.2 Orientation of a surface
4.3 Arrows perpendicular to the plane of the figure
5 Conventions concerning currents
5.1 Physical direction of current
Figures
Figure 1 – Orientation of a curve
Figure 2 – Orientation of a surface
21 5.2 Reference direction of current
5.3 Indication of the reference direction for currents
5.3.1 Indication of the reference direction for currents for a branch
5.3.2 Indication of the reference direction for mesh currents
Figure 3 – Indication of the reference direction for a current by an arrow
Figure 4 – Indication of the reference direction using the node names
22 5.4 Kirchhoff law for nodes
6 Conventions concerning voltages
6.1 Physical polarity of voltage
Figure 5 – Indication of the reference direction for mesh currents
Figure 6 – Examples of the Kirchhoff law for nodes
23 6.2 Reference polarity for a pair of nodes
6.3 Indication of the reference polarity
6.3.1 First method
6.3.2 Second method
Figure 7 – Indication of the reference polarity by means of plus and minus signs
Figure 8 – Simplified indication of the reference polarity by means of plus signs
Figure 9 – Indication of the reference polarity by an arrow
24 6.3.3 Third method
6.4 Kirchhoff law for meshes
Figure 10 – Indication of the reference polarity using the node names
Figure 11 – Simplified indication of the reference polarity using the node names
25 7 Conventions concerning power
7.1 Physical direction of power
7.2 Reference direction of power
7.3 Indication of the reference direction of power
7.4 Combined conventions
7.4.1 General
Figure 12 – Examples of the Kirchhoff law for meshes
Figure 13 – Indication of the reference direction of power
26 7.4.2 Motor convention
7.4.3 Generator convention
8 Conventions concerning two-port networks
Figure 14 – Examples of motor conventions
Figure 15 – Examples of generator conventions
27 9 Conventions concerning sources
9.1 Conventions concerning voltage sources
9.1.1 Independent voltage sources
9.1.2 Controlled voltage sources
Figure 16 – A reference convention for a two-port network
Figure 17 – Graphical representation of an independent voltage source
Figure 18 – Graphical representation of a voltage source controlled by a voltage: Us = αUc
28 9.2 Conventions concerning current sources
9.2.1 Independent current sources
9.2.2 Controlled current sources
Figure 19 – Graphical representation of a voltage source controlled by a current: Us = βic
Figure 20 – Graphical representation of an independent current source
29 10 Conventions concerning passive elements
10.1 General conventions
10.2 Resistive elements
10.2.1 Resistive two-terminal elements
Figure 21 – Graphical representation of a current source controlled by a voltage: is = γUc
Figure 22 – Graphical representation of a current source controlled by a current: is = δic
30 10.2.2 Resistive n-terminal elements
Figure 23 – Examples of graphical representations of a two-terminal resistive element
Figure 24 – Examples of the graphical representationof a four-terminal resistive element
31 10.3 Capacitive elements
10.3.1 Capacitive two-terminal elements
Figure 25 – Examples of the graphical representationof a two-terminal capacitive element
32 10.3.2 Capacitive n-terminal elements
Figure 26 – Examples of the graphical representationof a four-terminal capacitive element
34 10.4 Inductive elements
10.4.1 Inductive two-terminal elements
Figure 27 – Examples of the graphical representationof a two-terminal inductive element
35 10.4.2 Inductive n-port elements
Figure 28 – Examples of the graphical representation of a three-port inductive element
37 11 Complex notation
11.1 General
11.2 Conventions concerning complex representation of sinusoidal quantities
11.3 Reference direction of a complex current
38 11.4 Reference polarity for a complex voltage
Figure 29 – Examples of the Kirchhoff law for nodes in complex notation
39 11.5 Complex representation of Ohm’s law
Figure 30 – Examples of the Kirchhoff law for meshes in complex notation
40 11.6 Conventions concerning the graphical representation of phasors
11.7 Conventions concerning phase differences
Figure 31 – Examples of graphical representation of reference directionsand polarities in Ohm’s law for a complex two-terminal element
Figure 32 – Graphical representation of a phasor in the complex plane
Figure 33 – Graphical representation of phase difference in the complex plane
41 11.8 Conventions concerning power
11.8.1 Time-dependent electric power
11.8.2 Complex power
Figure 34 – Examples of the reference directions for time-dependent electric power
Figure 35 – Examples of the reference directions for the complex power
42 Bibliography

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BS EN IEC 60375:2018
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