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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BS EN Draft. Draft EN 71 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.
This document is not a European Standard. Sn is distributed for review and comments. It is subject to change without notice and 50470–1 not be referred 504700-1 as a European Standard. It is submitted to the Unique 50470- Procedure. Particular requirements — Electromechanical meters for active energy class indexes A and B and EN Particular requirements — Static meters for active energy class indexes A, B and C. It specifies general requirements and type tests methods.
This standard distinguishes between: It does not apply to: For rack-mounted meters, the mechanical properties are not covered in this standard. The test levels are regarded as 54070-1 values to guarantee the proper functioning of the meter under normal working conditions.
For special applications, other test levels might be necessary and should be agreed on between the user and the manufacturer.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. Electromechanical meters for active energy class indexes A and B Electricity metering equipment a. Static meters for active energy class indexes A, B and C vo If the meter has a measuring element s for more than one type of energy multi-energy metersor when other functional elements, like maximum demand indicators, electronic tariff registers, time switches, ripple control receivers, data communication interfaces, etc.
It also applies to operation indicator s and test output s. Instrument transformers — Part 1: Current transformers IEC Tests — Tests A: Tests — Test Sa: Simulated solar radiation at ground level IEC Tests — Test Fc: Vibration sinusoidal IEC Tests — Test Ka: Salt mist IEC Tests — Test Ea and guidance: Tests — Test Db and guidance: Tests — Test Eh: Hammer tests IEC Classification of groups of environmental dn and their severities — Section 1: Classification of groups of environmental parameters and their severities — 5470-1 2: Classification of groups of environmental eh and their severities — Section 3: Stationary use at weatherprotected locations IEC Tests — Tests B: Dry heat IEC Inductive voltage transformers IEC Testing and measurement techniques — Electrostatic discharge immunity test IEC Testing and measurement techniques — Power frequency magnetic field immunity test IEC Testing and measurement techniques — Voltage dips, short interruptions and voltage variations immunity tests IEC Testing and measurement techniques — Oscillatory waves immunity test IEC Pulse output devices for electromechanical and electronic meters two wires only IEC Plastic and ebonite ISO General definitions and test requirements IEC General terms relating to measurements — Part General terms relating to electrical measurements — Part Types of electrical measuring instruments 5070-1 Part Specific terms according to the type of instrument Graphical symbols for use on equipment Electromagnetic compatibility EMC — Part Testing and measurement techniques — Immunity 504700-1 conducted disturbances, induced by radio-frequency fields Electricity metering equipment a.
Testing and measurement techniques — Surge immunity test IEC Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity enn IEC Expressions of the performance of electrical and electronic measuring equipment have been dn from EN Where there is a difference between the definitions in this glossary and those contained in product standards produced by TC 13, then the latter shall take precedence in applications of the relevant standard.
The SI unit for active power is the watt. The type may have several values of reference current and reference voltage.
Meters are designated by the manufacturer by one or more groups of letters or numbers, or a combination of letters and numbers. Each type has one designation only.
EN – European Standards
Dr aft for vo 3. NOTE 2 Where the number of ampere-turns would lead to a number of turns other than a whole number, the product of the number of turns of the windings by 5470-1 value of the reference current may differ from that of the sample meter s representative of the type. It is advisable to choose the next number immediately above or below in order to have whole numbers of turns.
NOTE 3 The ratio of the highest to the lowest 504770-1 speed of the rotors of each of the meters ne the same type shall not exceed 1,5. NOTE The type is represented by the sample meter s intended for the 5470-1 tests, whose characteristics reference current and reference voltage are chosen from the values given in the tables proposed by the manufacturer.
It is usually designed and operated to obtain the highest accuracy and stability in a controlled laboratory environment [IEC3. A single electronic display may be used with multiple electronic memories to form multiple electronic registers.
BS EN 50470-1:2006
Dr [IEV modified] 3. It may be a single-position socket for one meter or a multiple-position socket for two or more meters [IEV modified] aft 3. At and above Imin, up to Itr relaxed accuracy requirements apply 3. For this range, relaxed accuracy requirements may be specified [IEC3.
An influence quantity is a disturbance if for that influence quantity the rated operating conditions are not specified 3.
NOTE 2 A voltage dip is a two-dimensional electromagnetic disturbance, the level of which is determined by both voltage and time duration. It generally comprises electromagnets with their control devices [IEC3. It comprises one or more magnets and their adjusting devices [IEC3.
The values of Ist, Imin, Itr, In, and Imax have to be chosen so, that the following relationships are met: 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. The specified measuring range of the meter may 5047-01 the specified measuring ranges of current 5047-01 with different rated currents.
Mechanical requirements and tests General mechanical requirements The manufacturer shall specify the mechanical environment the meter is intended for. NOTE Meters are generally used in locations where levels of vibration and shock are of low significance.
All parts, which are subject to corrosion under normal working conditions shall be protected effectively. Any protective coating shall not be liable to damage by ordinary handling nor damage due to exposure to air, under normal working conditions. Outdoor meters shall withstand solar radiation. NOTE For meters for special use in corrosive atmospheres, additional requirements shall be fixed in the purchase contract e.
The components shall be reliably fastened and secured against loosening. The construction of meters shall be such as to minimize the risks of short-circuiting of the insulation between live parts and accessible conductive parts due to accidental loosening or unscrewing of the wiring, screws, etc.
The cover shall not be removable without the use of a tool. The case shall be so constructed and arranged that any non-permanent deformation cannot prevent the satisfactory operation of the meter. The mechanical strength of the meter shall be tested with the following tests. 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.
Slight damage, which does not impair the protection against indirect contact or the penetration of solid objects, dust and water is acceptable.
After the test, the meter shall show no damage, nor change of the information and shall operate correctly in accordance with the requirements of the relevant standard. In order to satisfy such requirements when choosing insulating materials for the terminal block sadequate testing of materials shall be taken into account.
Dr The terminal block shall be so constructed that the meter during any deformation caused by rated operating conditions shall comply with the insulation requirements and the clearance and creepage distances within this standard. 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.
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.
Screw connections transmitting contact force and screw fixings, which may be loosened and tightened several times during the life of the meter shall screw into a metal nut. These windows shall be of transparent material, which cannot be removed undamaged without breaking the seal s. Electrical connections shall be so designed that contact pressure is not transmitted through insulating material.