IEC 62053-41 :2021 pdf download-Electricity metering equipment – Particular requirements.
7.1 0 Limits of error due to influence quantities Tests and test conditions given in IEC 62052-1 1 :2020, 7.1 apply. When the current is held constant as specified in Table 5, and any single influence quantity is applied one at a time, with the meter otherwise operated at reference conditions as specified in IEC 62052-1 1 :2020, 7.1 , the variation in percentage error relative to the intrinsic error shall not exceed the limits for the relevant class indexes given in Table 5. The variation in percentage error induced by the influence quantities may vary depending on the value of the test current. The variation in percentage error in Table 5 is given for the specified values or ranges of the test current, but the testing should be performed at the recommended values of test current given in Table 5.
9 Effects of external influences 9.1 General The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. Table 1 3 and Table 1 4 of IEC 62052-1 1 :2020 give an overview of the requirements. For tests with acceptance criteria A, Table 5 of this document shall be used. In addition, 9.2 specifies a specific test for conducted differential mode current disturbances for DC meters. See also Annex A. 9.2 Conducted differential mode current disturbances for DC meters The test is performed with disturbances in the current only; the test with voltage disturbances is not required. The test shall be carried out according to IEC 61 000-4-1 9:201 4, with the exceptions specified below, under the conditions specified in 7.1 of IEC 62052-1 1 :2020, and the following additional conditions: The meter shall be in operating condition: a) Voltage circuits and auxiliary power supply circuits energized with their lowest specified nominal voltages; b) The current circuits shall be carrying the value of the current given in Table 5;
The differential test current I Diff shall be applied to: c) Mains port: 1 ) 1 0 Hz to 2 kHz: I Diff = 2 A, 2) 2 kHz to 1 50 kHz: I Diff = 3 A. These test levels and frequency ranges are different from IEC 61 000-4-1 9; d) The test waves profiles “CW (Continuous Wave) pulses with pause” and “rectangularly modulated pulses” shall be used (IEC 61 000-4-1 9:201 4, 5.2.2 and 5.2.3); e) I Diff shall be generated with a tolerance of ±5 % of the selected level during the test; f) Frequency step shall be 1 %; g) The dwell time shall be as specified in 9.3.1 .2.2 of IEC 62052-1 1 :2020. Acceptance criteria: A, except for the indicating display function, which shall be evaluated according to criteria B (according to the definitions of acceptance criteria in 9.2 of IEC 62052-1 1 :2020). 10 Type test The requirements of IEC 62052-1 1 :2020 apply.