[Superseding IS 722 (Part 5):1980]

Reaffirmed 2017

1. SCOPE

1.1 This standard specifies the requirements and tests for 3 phase whole current and transformer operated volt-ampere hour meters 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 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 unrestricted full power factor range, and

b) volt-ampere hour meters in which the principle of measurement requires balanced conditions of load only.

NOTE - The application and operation of voitampere- hour meters are given in Annex A.

2. REFERENCES

2.1 Indian Standards given in Annex B are necessary adjuncts to this standard.