Question

IEC 61000-4-15 defines the methodology and specification of instrumentation for
1. measuring flicker
2. THD
3. power frequency variation
4. All of the above

Answer 1

Correct Answer - Option 1 : measuring flicker

Concept:

IEC 61000-4-15:

• IEC 61000-4-15 gives a functional and design specification for flicker measuring apparatus intended to indicate the correct flicker perception level for all practical voltage fluctuation waveforms. Information is presented to enable such an instrument to be constructed. 
• A method is given for the evaluation of flicker severity on the basis of the output of flicker meters complying with this standard.
• The flicker meter specifications in this part of IEC 61000 relate only to measurements of 120 V and 230 V, 50 Hz and 60 Hz inputs.