Document ID: chunk:federal_register_of_legislation:F2024C00311:clause:1_1
Version: federal_register_of_legislation:F2024C00311
Segment Type: clause
Provision Reference: sch 1 cl 1
Character Range: 214021–216078

1     ±5% in the flow rate range where the flow rate (Q) is greater than or equal to the minimum flow rate (Q1)and less than the transitional flow rate (Q2).            ±4% in the flow rate range if the flow rate (Q) is greater than or equal to 0.075 times the maximum continuous flow rate (Q3) and less than or equal to the maximum flow rate (Q4).
      ie: Q1  Q < Q2                                                                                                                                                    ie: 0.075 Q3  Q  Q4
      ±2% in the flow rate range if the flow rate (Q) is greater than or equal to the transitional flow rate (Q2) and less than or equal to the maximum flow rate (Q4).
      ie: Q2 Q  Q4

Division 12—Electricity meters
 1 In this Division:
Ib, for an electricity meter of a kind mentioned in clause 3, is the basic current.
Imax, for an electricity meter of a kind mentioned in clause 3 or 4, is the maximum current.
In, for an electricity meter of a kind mentioned in clause 4, is the nominal current.

Accuracy classes
 2 Electricity meters are classified into the following accuracy classes:
 (a) 0.2;
 (b) 0.5;
 (c) 1;
 (d) 1.5.

Maximum permissible errors—direct‑connected electricity meters
 3 The maximum permissible errors for the following kinds of electricity meters are set out, for an item, in columns 4 and 5 of table 18:
 (a) single phase direct‑connected electricity meters with an accuracy class mentioned, for the item, in column 4 or 5 of that table;
 (b) polyphase direct‑connected electricity meters with an accuracy class mentioned, for the item, in column 4 or 5 of that table.
 4 The maximum permissible errors mentioned in column 4 or 5 of table 18 apply at the current rate and power factor mentioned, for an item, in column 2 and 3 of that table.
Table 18 Single phase and polyphase direct‑connected electricity meters

Item  Current range         Power factor    Maximum permissible error (%)
                                            Accuracy class 1               Accuracy class 1.5