ДСТУ EN IEC 60071-1:2022 Координація ізоляції. Частина 1. Визначення, принципи та правила (EN IEC 60071-1:2019, IDT; IEC 60071-1:2019, IDT)



ДСТУ EN IEC 60071-1:2022
(EN IEC 60071-1:2019, IDT; IEC 60071-1:2019, IDT)

Координація ізоляції. Частина 1. Визначення, принципи та правила

 
   
 
 
     
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 and definitions

4 Abbreviated terms and symbols

4.1 General

4.2 Subscripts

4.3 Letter symbols

4.4 Abbreviations

5 Procedure for insulation co-ordination

5.1 General outline of the procedure

5.2 Determination of the representative voltages and overvoltages (U_rp)

5.3 Determination of the co-ordination withstand voltages (U_cw)

5.4 Determination of the required withstand voltage (U_rw)

5.5 Selection of the rated insulation level

5.6 List of standard rated short-duration power frequency withstand voltages

5.7 List of standard rated impulse withstand voltages

5.8 Ranges for highest voltage for equipment

5.9 Environmental conditions

5.9.1 Normal environmental conditions

5.9.2 Standard reference atmospheric conditions

5.10 Selection of the standard insulation level

5.11 Background of the standard insulation level

5.11.1 General

5.11.2 Standard rated switching impulse withstand voltage

5.11.3 Standard rated lightning impulse withstand voltage

6 Requirements for standard withstand voltage tests

6.1 General requirements

6.2 Standard short-duration power-frequency withstand voltage tests

6.3 Standard impulse withstand voltage tests

6.4 Alternative test situation

6.5 Phase-to-phase and longitudinal insulation standard withstand voltage tests for equipment in range I

6.5.1 Power-frequency tests

6.5.2 Phase-to-phase (or longitudinal) insulation lightning impulse tests

6.6 Phase-to-phase and longitudinal insulation standard withstand voltage tests for equipment in range II

Annex A (normative) Clearances in air to assure a specified impulse withstand voltage installation

A.1 General

A.2 Lightning impulse

A.3 Switching impulse

Annex B (informative) Rated insulation levels for highest voltages of equipment not standardized by IEC

Bibliography

Figure 1 - Flow chart for the determination of rated or standard insulation level

Table 1 - Classes and shapes of overvoltages, Standard voltage shapes and Standard withstand voltage tests

Table 2 - Standard insulation levels for range I (1 kV < U_m ≤ 245 kV)

Table 3 - Standard insulation levels for range II (U_m > 245 kV)

Table A.1 - Correlation between standard rated lightning impulse withstand voltages and minimum air clearances

Table A.2 - Correlation between standard rated switching impulse withstand voltages and minimum phase-to-earth air clearances

Table A.3 - Correlation between standard rated switching impulse withstand voltages and minimum phase-to-phase air clearances

Table B.1 - Rated insulation levels for highest voltages of equipment U_m not standardized by IEC