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IEC 62052-11-2020 pdf free download
IEC 62052-11-2020 pdf free download.Electricity metering equipment — General requirements, tests and test conditions — Part 11: Metering equipment.
6.4.2 Symbols for the measuring elements
In the symbols, which are given as examples in Annex D, Table D.2, each voltage circuit is
represented by a line and each current circuit by a small circle.
At the end of each line representing a voltage circuit, (a) circle(s) is (are) placed to represent (a) current circuit(s), arranged to have a point of common connection with that voltage circuit.
If a current circuit and a voltage circuit having such a common point of connection are not part of the same measuring element, the circle representing the current circuit is joined to the midpoint of the line representing the voltage circuit by means of a guideline not more than half the thickness of the first line.
The angle between two lines of a symbol represents the phase angle between the corresponding voltages provided the positive direction be accepted as that going towards the common point in two-line symbols.
In order to distinguish the direction of the voltage acting on each current, a current influenced by a positive direction of voltage shall be indicated by a black circle, and a current influenced by a negative direction of voltage shall be indicated by a white circle.
6.4.3 Symbols for transformer-operated meters
For transformer operated meters, the ratios of the external transformers shall be marked as follows.
The transformer ratios, which are taken into account in the energy registers values shall be shown on the indicating display (if present) and optionally marked on the name-plate or on the dial of the meter; for primary registers, the ratios of all the transformers shall be marked; and for half-primary registers, that ratios which are taken into account in the energy registers values shall be marked.IEC 62052-11-2020 pdf free download.
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