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
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The register shall be able to record and display, starting from zero, for a minimum of 4 h, the energy corresponding to maximum current at reference voltage and unity power factor.
At and above Imin, up to Itr relaxed accuracy requirements apply 3.
The standard values of the rated secondary current of the current transformers are 1 A, 2 A and 5 A, but the preferred value is 5 A. When continuously rotating, the 50470- showing the lowest values shall be graduated and numbered in ten divisions, each division being subdivided into ten parts, or any other arrangement ensuring the same reading accuracy.
If the meter is of a special type e.
Tests EN 500470-1 X 7. The terminals, the conductor fixing screws or the external or internal conductors shall not be liable to come into contact with metal terminal covers.
Class II equipment Information under a to d may be marked on an external plate permanently attached to the meter cover.
After the test, the meter shall show no damage and shall comply with the dielectric strength tests of 7. Draft EN 71 standards EN EN Electricity metering equipment a. Your basket is empty.
EN – Electricity metering equipment (a.c.) — Part 1: General req –
Outdoor meters shall withstand solar radiation. The impulse voltage shall be applied between all the electric circuits and earth. General requirements, tests and test conditions – Metering equipment class indexes A, B and C. Dr — — — meter in operating condition: Other requirements and other EC Directives may be applicable to the products falling within the scope of this standard. These tests shall be made in normal conditions of use.
Equipement de comptage classes de precision A, B et C. For current circuits, the voltage is considered to be the same as for the related voltage circuit. The mechanical strength of the meter shall be tested with 500470-1 following tests. All parts, which are subject to 50740-1 under normal working conditions shall be protected effectively.
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.
BS EN 50470-1:2006
Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive concerned. The impulse voltage tests shall be carried out first and the a.
In this subclause, the expression “all the terminals” means the whole set of terminals of the current circuits, voltage circuits and, if any, auxiliary circuits having a reference voltage over 40 V. Electromechanical meters for active energy class indexes A and B.
In this case, the adjustment of the 50740-1 must be controlled by a field sensor.
Unless otherwise specified, the normal conditions for insulation tests are: NOTE 2 A voltage dip is a two-dimensional electromagnetic disturbance, the level of which is determined by both voltage and time duration.
Each type has one designation only. General terms relating to electrical measurements — Part Electricity metering equipment a. The values of Ist, Imin, Itr, In, and Imax have to be chosen so, that the following relationships are met: Objects cannot be created from editing field codes.
You may experience issues viewing this site in Internet Explorer 9, 10 or Every meter shall bear the following information as applicable: 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 — Radiated, radio-frequency, electromagnetic field immunity test IEC The unmodulated output pulses shall have the shape shown in Figure B.
You may find similar items within these categories by selecting from the choices below:. Testing and measurement techniques — Oscillatory waves immunity test IEC Testing and measurement techniques — Surge immunity test IEC BS EN Draft.
EN – European Standards
Any ingress of dust shall be only in a quantity not impairing the operation of the meter. Learn more about the cookies we use and how to change your settings.
The tests shall be carried out according to ENunder the following conditions: The protective earth terminal, if any: If contact discharge 5070-1 not applicable because no metallic parts are outside, then apply air discharge with a 15 kV test voltage.