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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Thus, when the voltage and the current circuits of a measuring element isc connected together in normal use, the test shall be made on the whole. All parts intended to be earthed shall be earthed. During the test, the duration of which shall be 2 h, the meter shall be exposed neither to draught nor to direct solar radiation. Testing and measurement techniques — Section 5: Power consumption and voltage requirements IEC For this range, relaxed accuracy requirements may be specified 3.
Types of electrical measuring instruments — Part Slight damage which does not impair the protection against indirect contact or the penetration of solid objects, dust and water is acceptable. The maximum current of the meter is 1,2 I n1,5 I n or 2 I n. They should not be ignited by thermal overload of live parts in contact with them. If the meter is of a special type for example in the case of a multi-rate ie, if the voltage of the changeover device differs from the reference voltagethis shall be specified on the name-plate or on a separate plate.
After the test, the meter shall show no damage and shall comply with the dielectric strength tests of 7.
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Enter the exact number of the standard: If such small parts are accessible by the standard test finger as specified in IEC from outside the case, then they shall be additionally isolated from live parts by supplementary insulation against failure of basic insulation or loosening of live parts. NOTE 3 The regular roll over of the display is not considered ic a reset.
NOTE The accuracy may be determined by the registration method or other suitable means. List of test equipment for IEC 3rd ed. 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.
Unless otherwise specified, the normal conditions for insulation tests are: The mechanical strength of the meter case shall be tested with the following tests: The terminals of the circuits which are not subjected to impulse voltage shall be connected to earth. The IEC shall not be held responsible ief identifying any or all such patent rights. Short duration electromagnetic phenomena are considered as disturbance according to the definition given in 3.
Tests — Tests B: For undated references, the latest edition of the referenced document including any amendments applies.
INTERNATIONAL STANDARD IEC 62052-11
For each test, the impulse voltage is applied ten times with one polarity and then repeated with the other polarity. The pulse transition time rise time or fall time is the time of transition from one state to the other state, including transient effects. Hammer tests IEC Plastic and ebonite 3 Terms and definitions For the purposes of this International Standard, the following definitions apply. Meters are designated by the manufacturer by one or more groups of letters or numbers, or a combination of letters and numbers.
The insulating properties of laquer, enamel, ordinary paper, cotton, oxide film on metal parts, adhesive film and sealing compound, or similar unsure materials, shall not be regarded as sufficient for supplementary insulation. For combined temperature and humidity test, see 6. 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.
It comprises one or more magnets and their adjusting devices. To comply therewith they shall fulfil the following test. Output devices generally may not produce homogeneous pulse sequences.
When continuously rotating, the lowest values of the drums shall be graduated and numbered in ten divisions, each division being subdivided into ten parts, or any other arrangement ensuring the same reading accuracy. In this case, the adjustment of the amplifier must be controlled by a field sensor.
For the terminal block and terminal cover of such a meter, reinforced insulation is sufficient. 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.
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. Outdoor meters shall withstand solar radiation.
The committee has decided that the contents of this publication will remain unchanged until Electrical connections shall be so designed that contact pressure is not transmitted through insulating material. The unmodulated output pulses shall have the shape shown in Figure D.
For dated references, only the edition cited applies. Any protective coating kec not be liable to damage by ordinary handling nor damage due to exposure to air, under normal working conditions. Examples of markings are shown in Table 4. The distance of the optical pulse output from further adjacent ones or from an optical status display shall be sufficiently long that the transmission is not affected.
It is permissible to indicate the connection diagram by an identification figure in accordance with national standards. Modulated and unmodulated output pulses are permitted.
The terminals, the conductor fixing screws, or the external or internal conductors shall not be liable to come into contact with metal terminal covers. Metering equipment This English-language version is derived ifc the original bilingual publication by leaving out all French-language pages. When the meter is not energized, the electronic display need not be visible.
Tests 6252 Test Sa: