ДСТУ EN IEC 60071-2:2022 Координація ізоляції. Частина 2. Рекомендації щодо застосування (EN IEC 60071-2:2018, IDT; IEC 60071-2:2018, IDT)

ДСТУ EN IEC 60071-2:2022
(EN IEC 60071-2:2018, IDT; IEC 60071-2:2018, IDT)

Координація ізоляції. Частина 2.
Рекомендації щодо застосування

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

Contents

Foreword

1 Scope

2 Normative references

3 Terms, definitions, abbreviated terms and symbols

3.1 Terms and definitions

3.2 Abbreviated terms

3.3 Symbols

4 Representative voltage stresses in service

4.1 Origin and classification of voltage stresses

4.2 Characteristics of overvoltage protection devices

4.3 Representative voltages and overvoltages

5 Co-ordination withstand voltage

5.1 Insulation strength characteristics

5.2 Performance criterion

5.3 Insulation co-ordination procedures

6 Required withstand voltage

6.1 General remarks

6.2 Atmospheric correction

6.3 Safety factors

7 Standard withstand voltage and testing procedures

7.1 General remarks

7.2 Test conversion factors

7.3 Determination of insulation withstand by type tests

8 Special considerations for overhead lines

8.1 General remarks

8.2 Insulation co-ordination for operating voltages and temporary overvoltages

8.3 Insulation co-ordination for slow-front overvoltages

8.4 Insulation co-ordination for lightning overvoltages

9 Special considerations for substations

9.1 General remarks

9.2 Insulation co-ordination for overvoltages

Annex A (informative) Determination of temporary overvoltages due to earth faults

Annex B (informative) Weibull probability distributions

Annex C (informative) Determination of the representative slow-front overvoltage due to line energization and re-energization

Annex D (informative) Transferred overvoltages in transformers

Annex E (informative) Lightning overvoltages

Annex F (informative) Calculation of air gap breakdown strength from experimental data

Annex G (informative) Examples of insulation co-ordination procedure

Annex H (informative) Atmospheric correction - Altitude correction

Annex I (informative) Evaluation method of non-standard lightning overvoltage shape for representative voltages and overvoltages

Annex J (informative) Insulation co-ordination for very-fast-front overvoltages in UHV substations

Bibliography

Annex ZA (normative) Normative references to international publications with their corresponding European publications