Paragraph 2 Rated operating conditionsF1

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

	Class A	Class B	Class C
¹ For Class B electromechanical meters I_min_≤ 0.4 ∙ I_tr shall apply.
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_tr¹	_≤ 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_≤U _≤1.1 ∙ U_n
0.98 ∙ f_n_≤ f _≤ 1.02 ∙ f_n

power factor range at least from cosφ = 0.5 inductive to cosφ = 0.8 capacitive.

Annotations

Textual amendments

F1: Schs. 1A-1K inserted (E.W.S.) (31.12.2020) by The Product Safety and Metrology etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/696), reg. 1, Sch. 27 para. 49 (with Sch. 27 para. 50(a)) (as amended by S.I. 2020/676, regs. 1(1), 2); 2020 c. 1, Sch. 5 para. 1(1)