UNE-EN IEC 62057-1:2023

This part of IEC 62057 applies to stationary meter test units (MTUs) permanently installed

in laboratories, used for testing and calibration of electricity meters, in particular for their

type test, acceptance test and verification test. It covers the requirements for automatic

MTUs for indoor laboratory application and applies to newly manufactured MTUs to test

electricity meters on 50 Hz or 60 Hz networks with an AC voltage up to 600V (phase to

neutral).

If meters are intended for system voltages not specified in this standard, special

requirements should be agreed on between the manufacturer and the purchaser.

This standard also defines the kind of tests to perform as type tests / routine tests /

acceptance tests and commissioning tests for MTUs.

It does not apply to:

" portable reference meters & portable sources;

" electricity meters;

" data interfaces to the meter and test procedures of data interface;

" transformer operated meter test units;

" personal computers supplied together with the MTU.