INTERNATIONAL. STANDARD. IEC. First edition. Electricity metering equipment (a.c.) –. General requirements, tests and test conditions –. IEC ELECTRICITY METERING EQUIPMENT (A.C.) – GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS – PART METERING. Buy IEC Ed. Electricity metering equipment (AC) – General requirements, tests and test conditions Part Metering equipment from SAI Global.
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This standard distinguishes between — meters intended to be used indoors and outdoors; and — protective class I and protective class II meters.
For testing, see 7. The other auxiliary circuits shall not be tested. The distortion factor is usually expressed as a percentage 3. The test shall be carried out according to IECwith the following temperatures: Please assess the standard in the following categories, using the numbers: For current circuits, the voltage is considered to be the same as for the related voltage circuit.
Tests — Test Eh: During the test, a temporary degradation or loss of function or performance is acceptable. 662052 neutral terminal of the meter under test is disconnected from the ground terminal of the meter test equipment MTE and is connected to the MTE’s line terminal at which the earth fault has to be simulated see Annex C.
INTERNATIONAL STANDARD IEC
In order to satisfy such requirements when choosing insulating materials for the terminal block sadequate testing of materials shall be taken into account. For a test under a simulated earth fault condition in one of the three lines, all voltages are increased to 1,1 times the nominal voltages during 4 h.
General terms relating to electrical measurements — Part An optimum pulse transmission 2 is achieved when, under test conditions, the receiving head is aligned with its optical axis on the optical pulse output. For each test, the impulse voltage is applied ten times with one polarity and then repeated with the other polarity.
Tests — Test Db and guidance: The other terminal of this current circuit shall be open. The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.
The impulse voltage tests shall be carried out first and the a. Standard symbols may 60252 be used see IEC These tests shall be made in normal conditions of use.
The maximum pulse frequency shall not exceed 2,5 kHz. Reference number IEC Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. NOTE 3 The ifc roll over of the display is not considered as a reset. Inductive voltage transformers IEC It comprises one or more magnets and their adjusting devices.
INTERNATIONAL STANDARD IEC 62052-11
Each type has one designation only. The principal unit for the measured values shall be the kilowatt-hour kWhkilovar-hour kvarhkilovolt-ampere-hour kVAh or the megawatt-hour MWhmegavar-hour Mvarhmegavolt-ampere-hour MVAh.
If the test output is an optical test output, then it shall fulfil the requirements according 5. The cover shall not be removable without the use of a tool. Specific terms ifc to the type of instrument IEC In the case of an electronic display the corresponding non-volatile memory shall have a minimum retention time of four months.
This standard is intended to be used in conjunction with the appropriate part of 6252 for the type of equipment under consideration.
After the test, the meter shall show no damage or change of the information and shall operate correctly in accordance with the requirements of the relevant standard. NOTE 3 The ratio of ic highest to the lowest basic speed of the rotors of each of the meters of the same type shall not exceed 1,5.
When displaying the memory, the identification of each tariff applied 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 electromechanical registers, register markings 60252 be indelible and easily readable. The test shall be carried out according to IECunder the following conditions: The rise time given in Annex D, Figure D.
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 impulse voltage shall be applied between the other terminal of the voltage iex and 6205. NOTE For meters for special use in corrosive atmospheres, additional requirements shall be fixed in the purchase contract for example salt mist test according to IEC An insulation test according to 7.
Plastic and ebonite 3 Terms and definitions For the purposes of this International Standard, the following definitions apply. Output devices generally may not produce homogeneous pulse sequences.
When the meter is not energized, the electronic display need not be visible. For electrical test output see, IEC General terms relating to measurements — Part These windows shall be of transparent material which cannot be removed undamaged without breaking the seal s.
When the voltage is restored, the meter shall not have suffered degradation of its metrological characteristics. Surge immunity test IEC Where there is a difference between the definitions in the glossary and those contained in product standards produced by TC 13, then the latter shall take precedence in applications of the relevant standard.
For testing purposes, the register of the electricity meter shall have a resolution of at least 0,01 units.
Please contact the Customer Service Centre see below for further ice. The result is judged visually. 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.
For example, edition numbers 1.