Buy DIN EN () Electricity Metering Equipment (a.c.) – Part 1: General Requirements, Tests And Test Conditions – Metering Equipment (class. BS EN Electricity metering equipment (a.c.). General requirements, tests and test conditions. Metering equipment (class indexes. Find the most up-to-date version of CEI EN at Engineering
|Published (Last):||18 November 2010|
|PDF File Size:||9.53 Mb|
|ePub File Size:||17.28 Mb|
|Price:||Free* [*Free Regsitration Required]|
It specifies general requirements and type tests methods. Accelerated reliability testing – Elevated 50470-11 and humidity IEC The active tariff rate shall be indicated. These windows shall be of transparent material, which cannot be removed undamaged without breaking the seal s.
Where the terminal cover makes it possible, the conductive foil shall approach the terminals and the holes for the conductors within a distance of not more eh 2 cm. Dr If for any reason the insulation tests have to be repeated, then they may be performed on a new 50470. The manner of fixing the conductors to the terminals shall ensure adequate and durable contact such that there is no risk of loosening or undue heating. The pulse transition time rise time or fall time is the time from one state to the other state, including transient effects.
An optimum pulse transmission 6 is achieved when, under test conditions, the receiving head is aligned with its optical axis on the optical pulse output.
A recommended test sequence is given in Annex F. Particular requirements — Electromechanical meters for active energy class indexes A and B and EN See also Figure C. The price of the Standard included all amendments and correcturs.
Simulated solar radiation at ground level IEC 54070-1 The other end of the voltage circuit shall be connected to earth and the impulse voltage shall be applied between the terminal of the current circuit and earth. Testing and measurement techniques — Surge immunity test IEC Salt mist IEC The auxiliary circuits intended to be connected either directly to the mains or to the same voltage transformers as the meter circuits, and with a reference voltage over 40 V, shall be subjected to the impulse voltage test in the same conditions as those already given for 504770-1 circuits.
The protective earth terminal, if any: When the meter is panel-mounted, no access to the terminals shall be possible without breaking the seal s of the terminal cover s. Allgemeine Anforderungen, Pruefungen und Pruefbedingungen. Search all products by. The test shall be carried out according to ENunder the following conditions: General definitions and test requirements IEC Dr — — — meter in operating condition: During the test, the behaviour of the equipment shall not be perturbed and the additional percentage error shall not exceed the critical change values specified in the relevant standards.
Objects cannot be created from editing field codes. During the test of a voltage circuit, the terminals of the other circuits and one of the terminals of the voltage circuit under test shall be connected to earth and the impulse voltage shall be applied between the other terminal of the voltage circuit and earth.
The terminal cover shall enclose the actual terminals, 500470-1 conductor fixing screws and, unless otherwise specified, a suitable length of the external conductors and their insulation.
Testing and measurement techniques — Electrostatic discharge immunity test IEC The other terminal of this current circuit shall be open. During the test, the quality of the insulation shall not be 500470-1 by dust or abnormal humidity.
Electricity metering – Payment systems – Part For testing purposes, it shall be possible to increase the resolution to 0,01 times the principal unit. Some of the tests are not applicable to electromechanical meters — see EN — these cases are 5040-1. It is permissible to indicate the connection diagram by an identification figure in accordance with national standards.
EN – European Standards
Tests — Tests B: Protective earth ground After installation, it shall not be possible to loosen the protective earth terminal without the use of a tool. For electromechanical registers, register markings shall be indelible and easily readable.
Meters are designated by the manufacturer by wn or more groups of letters or numbers, or a combination of letters and numbers. Specific terms according to the type of instrument Graphical symbols for use on equipment Electromagnetic compatibility EMC — Part Plastic and ebonite ISO The unmodulated output pulses shall have the shape shown in Figure B.
To comply therewith they shall fulfil the following test.
EN – Electricity metering equipment (a.c.) — Part 1: General req –
The maximum pulse frequency shall not exceed 2,5 kHz. The application of the surge immunity test voltage shall not produce a change in the register more than x units and the test output shall not produce a signal equivalent to more than x units.
The principal unit shall be shown adjacent to the measured ne. The faster, easier way to work with standards. Learn more about the cookies we use and how to change your settings. If the meter is of a special type e. The application of the electrostatic discharge shall not produce a change in the register of more than x units and the test output shall not produce a signal equivalent to more than x units. General requirements, tests and test conditions – Metering equipment class indexes A, B and C – This European Standard applies to newly manufactured watt-hour meters, measuring active electrical energy, intended for residential, commercial and light industrial use, for use on 50 Hz electrical networks.
In the case of multiple values presented by a single display it shall be possible to display the content of all relevant memories. The test levels are regarded as minimum values to guarantee the proper functioning of the meter under normal working dn.
Thus, when the voltage ej the current circuits of a measuring element are connected together in normal use the test shall be made on the whole.