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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Classification of groups of environmental parameters and their severities — Section 3: EN EN Electricity metering equipment a. For current circuits, the voltage is considered to be the same as for the related voltage circuit. Tests EN Clause X 7.
It is subject to change without notice and shall not be referred to as a European Standard. Thus, when the voltage and the current circuits of a measuring element are connected together in normal use the test shall be made on the whole. Take the smart route to manage medical device compliance. Specific terms according to the type of instrument Graphical symbols for use on equipment Electromagnetic compatibility EMC — Part Testing and measurement techniques — Surge immunity test IEC The terminals, the conductor fixing screws eh the external or internal conductors shall not be liable to come into contact with metal wn covers.
Dr [IEV modified] 3.
To comply therewith they shall fulfil the following test. All parts, which are subject to corrosion under normal working conditions shall be protected effectively.
When displaying the contents of the memory iesthe clear and unambiguous identification of each value shall be possible and, for automatic sequencing displays, each display of register for billing purposes shall be retained for a minimum of 5 s. For rack-mounted meters, the mechanical properties are not covered in this standard.
It rn comprises electromagnets with their control devices [IEC3.
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.
Resistance to heat and fire The terminal block, the terminal cover and the meter case shall ensure reasonable safety against spread of fire. The components shall be reliably fastened and secured against loosening.
I max enn x m Un is the critical change value in kWh units; is the number of measuring elements; 50407-1 the reference voltage in volts; 7.
The case shall be so constructed and arranged that any non-permanent deformation cannot prevent the satisfactory operation of the meter. For examples of test set-up see Figure D.
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. It can be either electromechanical or electronic comprising both memory ies and display. An optimum pulse transmission 6 is achieved when, under test conditions, the receiving rn is aligned with its optical axis on the optical pulse output.
BS EN 50470-1:2006
NOTE 2 Values higher than 4 h should be subject of purchase contract. The application of the RF field shall not produce dn change in the register more than x units and the test output shall not produce a signal equivalent to more than x units. It does not apply to: The 3-layer, connection-oriented HDLC based communication profile. Dr If for any reason the insulation tests have to be repeated, then they may be performed on a new specimen.
The principal unit for the measured values shall be the kilowatt-hour kWhor the megawatt-hour MWh. NOTE 2 A voltage dip is a two-dimensional electromagnetic disturbance, the level of which is determined by both voltage and time duration.
Classification of groups of environmental parameters and 504470-1 severities — Section 2: Protective earth ground After installation, it shall not be possible to loosen the protective earth terminal without the use of a tool. It is usually designed and operated to obtain the highest accuracy and stability in a controlled laboratory environment [IEC3. During the test, the quality of the insulation shall not be impaired by dust or abnormal humidity. 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.
Class II equipment Information under a to d may be marked on an external plate permanently attached to the meter cover. It shall be easily readable under normal conditions of use. 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 voltage circuits.
The SI unit for active power is the watt. The meter shall withstand the impulse voltage test and the a. These tests shall be made in normal conditions of use. Mechanical requirements and tests General mechanical requirements The manufacturer shall specify the mechanical environment the meter is intended for.
Some of the tests are not applicable to electromechanical meters — see EN — these cases are indicated. Rn 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.
An insulation test according to 7.
EN – European Standards
Standard symbols may also be used see EN The active tariff rate shall be indicated. NOTE The type is represented by the sample meter s intended 50470–1 the type tests, whose characteristics reference current and reference voltage are chosen from the values given in the tables proposed by the manufacturer.
550470-1 protective coating shall not be liable to damage by ordinary handling nor damage due to exposure to air, under normal working conditions. Testing and measurement techniques — Immunity to conducted disturbances, induced by radio-frequency fields Electricity metering equipment a. During the test, a temporary degradation or loss of function or eh is acceptable. It is advisable to choose the next number immediately above or below in order to have whole numbers of turns.