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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Mechanical requirements and tests General mechanical requirements The manufacturer shall specify the mechanical environment the meter is intended for. The function of the meter shall not be impaired. It is subject to change without notice and shall not be referred to as a European Standard. Slight damage, which does not impair the protection against indirect contact or the penetration of solid objects, dust and water 5040-1 acceptable.
BS EN 50470-1:2006
Tests — Test Ka: Metering equipment class indexes A, B and C. The meter shall withstand the impulse voltage test and the a. It specifies general requirements and type tests methods. Tests — Tests A: Electromagnetic disturbances of long duration shall not cause an additional percentage error more than the critical 504701- values specified in the relevant particular requirements standards.
The tests shall be carried out according to ENunder the following conditions: For this range, relaxed accuracy requirements may be specified [IECne.
Instrument transformers — Part 1: The impulse voltage tests shall be carried out first and the a. NOTE Meters are generally used in locations where levels of vibration and shock are of low 5047-01.
General terms relating to measurements — Part These tests shall 50470-11 made in normal conditions of use. Modulated and unmodulated output pulses are permitted. For examples of test set-up see Figure D. The minimum time between the impulses shall be 3 s.
54070-1 The holes in the insulating material, which form an extension of the terminal holes, shall be of sufficient size to accommodate also the insulation of the conductors. It is advisable to choose the next number immediately above or below in order to have whole numbers of 504700-1.
The auxiliary circuits with a reference voltage below or equal to 40 V shall be connected to earth. An influence quantity is a disturbance if for that influence quantity the rated operating conditions are not specified 3. The protective earth terminal, if any: Metering equipment class indexes A, B and C Status: Dr [IEV modified] 3. The terminals of the circuits, which are not subjected to impulse voltage shall be connected to earth.
The mechanical strength of the meter shall be tested with the following tests. Electromechanical meters for active energy class indexes A and B. It is distributed for review and comments. EN EN Electricity metering equipment a. The drums, which indicate a decimal fraction of the unit shall be marked differently when they are visible. Current transformers IEC 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 ej 2 cm.
When continuously rotating, the drum 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.
EN – Electricity metering equipment (a.c.) — Part 1: General req –
General terms relating to electrical measurements — Part You may find similar items within these categories by selecting from the choices below:. The pulse transition time rise time or fall time is the time from one state to the other state, including transient effects.
The result of the test is satisfactory if the meter case and terminal cover do not sustain damage, which could affect the function of the meter and it is not possible to touch live parts.
NOTE 2 Values higher than 4 h should be subject of purchase contract. NOTE For meters for special use in corrosive atmospheres, additional requirements shall be fixed in the purchase contract e.
Tests — Test Eh: Electricity metering equipment – Dependability – Part If such small parts are accessible by the standard test finger as specified in EN from outside the case, then they shall be additionally isolated from live parts by supplementary insulation against failure of 5070-1 insulation or loosening of live parts.
Resistance to heat and fire The terminal block, the terminal cover and the meter case shall ensure reasonable safety against sn of fire.