4.3. Permissible effect of transient electromagnetic phenomena

Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments (recast) Text with EEA relevance · European Union

The effect of an electromagnetic disturbance on an electrical energy meter shall be such that during and immediately after a disturbance: any output intended for testing the accuracy of the meter does not produce pulses or signals corresponding to an energy of more than the critical change value, and in reasonable time after the disturbance the meter shall: recover to operate within the MPE limits, and have all measurement functions safeguarded, and allow recovery of all measurement data present prior to the disturbance, and not indicate a change in the registered energy of more than the critical change value. The critical change value in kWh is m U_(n) I_(max) 10–6 (m being the number of measuring elements of the meter, U_(n) in Volts and I_(max) in Amps). For overcurrent the critical change value is 1,5 %.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-06 · Text as adopted (Official Journal); later amendments are not incorporated in this text.