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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These windows shall be of transparent material, which cannot be removed undamaged without breaking the seal s. 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. During type tests, the dielectric strength tests are considered to be valid only for the terminal arrangement of the meter, which has undergone the tests.
Ne transformers IEC Mechanical fn and tests General mechanical requirements The manufacturer shall specify the mechanical environment the meter is intended for.
Plastic and 50740-1 ISO For dated references, only the edition cited applies. It does not apply to: Dr The type test defined in 3. An optimum pulse transmission 6 is achieved when, under test conditions, the receiving head is aligned with its optical axis on the optical pulse output.
Electricity metering equipment – Dependability – Part If the meter is of a special type e. 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.
EN – European Standards
When the voltage and the current circuits of the same measuring element are separated and appropriately insulated in normal use for example each circuit connected to a measuring transformerthe test shall be made separately on each circuit. The damp heat test also serves as a corrosion 50470. When the meter is panel-mounted, no access to the terminals shall be possible without breaking the seal s of the terminal cover s.
In this case, the adjustment of the amplifier must be controlled by a field sensor. For undated references, the eb edition of the referenced document including any amendments applies. Standard symbols may also be used see EN The 3-layer, connection-oriented HDLC based communication profile.
During this test no flashover, disruptive discharge or puncture shall occur. Dr If for any reason the insulation tests have to be repeated, then they may be performed on a new specimen.
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 — 504700-1 2: Specific terms according to the type of instrument Graphical symbols for use on equipment Electromagnetic compatibility EMC — Part Electromagnetic disturbances of long duration shall not cause an additional percentage error more than the critical change values specified in the relevant particular requirements standards.
Testing and measurement techniques — Oscillatory waves immunity test IEC 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.
The display of the total quantity of 50740-1 energy supplied or the displays from which the total quantity supplied can be derived, whole or partial reference to which is the basis for payment, shall not be able to be reset during use. A recommended test sequence fn given in Annex F.
At and above Imin, up to Itr relaxed accuracy requirements apply 3. If this is not possible reference shall be made to a connection diagram. It is permissible to indicate the connection diagram by an identification figure in accordance with national standards.
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Information under e to l shall be marked on a name-plate preferably placed within the meter.