1.1 This standard (Part V) specifies the requirements and tests for 3-phase whole current and transformer operated volt-ampere hour meters of an accuracy Class 3.5 for restricted power factor range with maximum demand indicator and other tariff devices or accessories for unbalanced load for use in 3-phase 3-wire and 3-phase 4-wire supplies.
1.1.1 For the maximum demand indicators, the requirements covered in IS : 8530-1977〓 shall apply.
1.2 It does not apply to:
a) volt-ampere hour meters for full power factor range, and
b) volt-ampere hour meters in which the principle of measurement requires balanced conditions of load.
IS 722 Pt.5-1980 history
1980IS 722 Pt.5-1980 Specifications for AC Meters Part V Volt-ampere-hour meters with limited power factor range Class 3.5