Specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment..
Specifies particular requirements for acceptance inspection of newly
manufactured direct connected or transformer operated electromechanical meters for active
energy (classes 0,5, 1 and 2) delivered in lots in quantities above 50...
Specifies particular requirements for acceptance inspection of newly
manufactured direct connected or transformer operated static meters for active energy
(classes 0,2 S, 0,5 S, 1 and 2) delivered in lots in quantities above 50...
Covers type tests for electricity metering equipment for indoor and outdoor application and to newly manufactured equipment designed to measure the electric energy on 50 Hz or 60 Hz networks, with a voltage up to 600 V..
Applies to letter and graphical symbols intended for marking on and
identifying the function of electromechanical or static a.c. electricity meters and their auxiliary
devices...
Describes methods for the collection and analysis of field failure data
of static electricity metering equipment using field failure reports and sampling plans...
Specifies a method for testing the stability of metrological
characteristics of electricity meters, by operating a test specimen at the upper limit of the
specified operating range of temperature, voltage and current for an extended period...