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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For rack-mounted meters, the mechanical properties are not covered in this standard.
Classification of groups of environmental parameters and their severities — Section 2: Instrument transformers — Part 1: The values of Ist, Imin, Itr, In, and Imax have to be chosen so, that the following relationships are met: Testing and measurement techniques — Oscillatory waves immunity test IEC The impulse voltage tests shall be carried out first and the a.
Dr The insulation materials shall comply with the appropriate requirements of EN The price of the Standard included all amendments and correcturs. When several voltage circuits of a meter have a common point, this point shall be connected to earth and the impulse voltage successively applied between each of the free ends of the connections or the current circuit connected to it and earth. Resistance to heat and fire The terminal block, the terminal cover and the meter case shall ensure reasonable safety against spread of fire.
It also applies to operation indicator s and test output s. Search all products by.
Stationary use at weatherprotected locations IEC The mechanical strength of the meter shall be tested with the following tests. When displaying the contents of the memory iesthe clear and unambiguous identification of each 5047-1 shall be possible and, for automatic sequencing displays, each display of register for billing purposes shall be retained for a minimum of 5 s.
Modulated and unmodulated output pulses are permitted.
Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity 50407-1 IEC Accelerated reliability testing – Elevated temperature and humidity IEC The e measuring range of the meter may cover the specified measuring ranges of current transformers with different rated currents.
General requirements, tests and test conditions – Metering equipment class indexes A, B and C. At and above Imin, up to Itr relaxed accuracy requirements apply 3. Other requirements and other EC Directives may be applicable to the products falling within the scope of this standard.
Metering equipment class indexes A, B and C. Dr [IEV modified] 3. In the case of modifications to the meter made after the type test and affecting only part of the meter, it will be sufficient to perform limited tests on the characteristics that may be affected by the modifications. Classification of groups of environmental parameters and their severities — Section 1: Class II equipment Information under a to d may be marked on an external plate permanently attached to the meter cover.
During the test, the quality of the insulation shall not be impaired by dust or abnormal humidity. Information on cookies usage.
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 type may have several values of reference current and reference voltage. Tests — Test Eh: General requirements, tests and test conditions – Metering equipment class indexes A, B and C Electricity metering equipment a.
After these tests, there shall be no change at reference conditions in the percentage error of the meter greater than the repeatability of the measurement and no mechanical damage to the equipment.
Individual instruction manuals are not necessarily required. It specifies general requirements and type tests methods. Pulse output devices for electromechanical and electronic meters two wires only IEC The meter shall show no damage or change of information and shall operate correctly.
After the test, the meter shall show no damage and shall comply with the dielectric strength tests of 7. Classification of groups of environmental parameters and their severities — Section 3: During this test no flashover, disruptive discharge or puncture shall occur. Click to learn more. 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 wn voltage shall be applied between the other terminal of the voltage circuit and earth.
For this range, relaxed accuracy requirements may be specified [IEC3.
EN – European Standards
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. It is usually designed and operated to obtain the highest accuracy and stability in a controlled laboratory environment [IEC3.
The test levels are regarded 504701 minimum values to guarantee the proper functioning of the wn under normal working conditions.
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. Outdoor meters shall withstand solar radiation. The minimum time between the impulses shall be 3 s. Testing and measurement techniques — Voltage dips, short interruptions and voltage variations immunity tests IEC It is advisable to choose the next number immediately above or below in order to have whole numbers of turns.
When dn terminal arrangements differ, all the dielectric strength tests shall be carried out for each arrangement. Unless otherwise specified, the normal conditions for insulation tests are: