2. Rated operating conditions
The manufacturer shall specify the rated operating conditions of the meter; in particular: The values of f_(n), U_(n), I_(n), I_(st), I_(min), I_(tr) and I_(max) that apply to the meter. For the current values specified, the meter shall satisfy the conditions given in Table 1; Table 1 For Class B electromechanical meters I_(min)0,4 I_(tr) shall apply. Class A Class B Class C For direct-connected meters I_(st) 0,05 I_(tr) 0,04 I_(tr) 0,04 I_(tr) I_(min) 0,5 I_(tr) 0,5 I_(tr) 0,3 I_(tr) I_(max) 50 I_(tr) 50 I_(tr) 50 I_(tr) For transformer-operated meters I_(st) 0,06 I_(tr) 0,04 I_(tr) 0,02 I_(tr) I_(min) 0,4 I_(tr) 0,2 I_(tr) 0,2 I_(tr) I_(n) 20 I_(tr) 20 I_(tr) 20 I_(tr) I_(max) 1,2 I_(n) 1,2 I_(n) 1,2 I_(n) The voltage, frequency and power factor ranges within which the meter shall satisfy the MPE requirements are specified in Table 2. These ranges shall recognise the typical characteristics of electricity supplied by public distribution systems. The voltage and frequency ranges shall be at least: 0,9 U_(n)U1,1 U_(n) 0,98 f_(n)f1,02 f_(n) power factor range at least from cosφ = 0,5 inductive to cosφ = 0,8 capacitive.
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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.