ДСТУ EN 60076-10:2022 Силові трансформатори. Частина 10. Визначення рівнів звуку (EN 60076-10:2016, IDT; IEC 60076-10:2016, IDT)



ДСТУ EN 60076-10:2022
(EN 60076-10:2016, IDT; IEC 60076-10:2016, IDT)

Силові трансформатори. Частина 10. Визначення рівнів звуку

 
   
 
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

FOREWORD

INTRODUCTION

1 Scope

2 Normative references

3 Terms and definitions

4 Sound power for different loading conditions

4.1 General

4.2 Sound power at no-load excitation

4.3 Sound power of the cooling device(s)

4.4 Sound power due to load current

5 Sound level measurement specification

6 Instrumentation, calibration and accuracy

7 Principal radiating surface

7.1 General

7.2 Transformers with or without cooling device

7.3 Transformers in enclosures with cooling devices inside the enclosure

7.4 Transformers in enclosures with cooling devices outside the enclosure

7.5 Cooling devices mounted on a separate structure where the distance between the two principal radiating surfaces is 3 m

7.6 Dry-type transformers

7.7 Dry-type air-core reactors

8 Prescribed contour

9 Microphone positions

10 Calculation of the measurement surface area

10.1 Measurement surface area for measuring distances up to 30 m

10.2 Measurement surface area for measuring distances larger than 30 m

11 Sound measurement

11.1 Test conditions

11.2 Sound pressure method

11.3 Sound intensity method

12 Determination of sound power level by calculation

13 Logarithmic addition and subtraction of individual sound levels

14 Far-field calculations for distances larger than 30 m

15 Presentation of results

Annex A (informative) Narrow-band and time-synchronous measurements

Annex B (informative) Typical report of sound level determination

Bibliography