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PD CLC IEC/TR 62271-307:2019 High-voltage switchgear and controlgear - Guidance for the extension of validity of type tests of AC metal and solid-insulation enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV, 2019
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- 1 General [Go to Page]
- 1.1 Scope
- 1.2 Normative references
- 2 Terms and definitions
- 3 Use of extension criteria [Go to Page]
- 3.1 General
- 3.2 Parameters for extension criteria
- 3.3 Use of calculations [Go to Page]
- 3.3.1 General
- Tables [Go to Page]
- Table 1 – Examples of design parameters [Go to Page]
- 3.3.2 Temperature rise calculations
- 3.3.3 Electric field calculations
- 3.3.4 Mechanical stress calculations
- 3.3.5 Short-circuit current calculations
- 3.3.6 Internal arc pressure rise calculations
- 3.4 Information needed for extension of type test validity
- 4 Application of extension criteria [Go to Page]
- 4.1 Dielectric tests
- 4.2 Temperature rise tests
- Table 2 – Extension criteria for dielectric withstand performance
- Table 3 – Extension criteria for temperature rise performance
- 4.3 Mechanical tests
- 4.4 Short-time and peak withstand current tests
- Table 4 – Extension criteria for mechanical performance
- 4.5 Making and breaking tests
- Table 5 – Extension criteria for short-time and peak withstand current performance
- 4.6 Internal arc fault tests [Go to Page]
- 4.6.1 General
- 4.6.2 Extension criteria with respect to design
- Table 6 – Extension criteria for making and breaking capacity [Go to Page]
- 4.6.3 Extension criteria with respect to ratings and installation conditions
- Table 7 – Extension criteria for internal arc fault withstand performance
- 5 Extending the validity of type tests [Go to Page]
- 5.1 General
- Table 8 – Extension criteria for internal arc fault classification with respect to installation conditions
- 5.2 Extension of validity of a test report to other functional units (situation a)
- Figures [Go to Page]
- Figure 1 – Extension of validity of one test report; situation a)
- 5.3 Validation of a family by selection of test objects (situation b) [Go to Page]
- 5.3.1 General
- 5.3.2 Mapping of the family
- Figure 2 – Validation of a family by selection of appropriate test objects; situation b) [Go to Page]
- 5.3.3 Specification of test objects
- 5.4 Validation of an assembly by existing test reports (situation c)
- 5.5 Validation of a design modification (situation d)
- Figure 3 – Validation of actual assembly with existing test reports; situation c)
- Annex A (informative) Rationale for the extension criteria [Go to Page]
- A.1 General
- A.2 Dielectric tests [Go to Page]
- A.2.1 General
- A.2.2 Clearances (Items 1 and 2)
- A.2.3 Insulating supports and material (Items 3 and 4)
- A.2.4 Live parts (Items 5 and 6)
- A.2.5 Open contact gap and isolating distance (Items 7 and 8)
- A.2.6 Minimum functional pressure for insulation (Item 9)
- A.3 Temperature rise tests [Go to Page]
- A.3.1 General
- A.3.2 Centre distance between phase conductors (Item 1)
- A.3.3 Phase to earth distance (Item 2)
- A.3.4 Enclosure and compartment volume (Item 3)
- A.3.5 Insulating gas (Item 4)
- A.3.6 Conductors (Items 5 and 6)
- A.3.7 Conductor joints and connections (Items 7, 8 and 9)
- A.3.8 Ventilation area of partitions and enclosure (Item 10)
- A.3.9 Power dissipation of components (Item 11)
- A.3.10 Insulating barriers (Item 12)
- A.3.11 Insulating coating of conductors and enclosures (Item 13 and 14)
- A.3.12 Insulating material in contact with conductors (Item 15)
- A.4 Mechanical tests [Go to Page]
- A.4.1 General
- A.4.2 Shutter systems (Item 1)
- A.4.3 Contacts of removable parts (Item 2)
- A.4.4 Interlocking systems (Items 3 and 4)
- A.5 Short-time and peak withstand current tests [Go to Page]
- A.5.1 General
- A.5.2 Centre distance between phase conductors (Item 1)
- A.5.3 Conductors (Items 2, 5 and 6)
- A.5.4 Insulating conductor supports (Items 3 and 4)
- A.5.5 Insulating material in contact with conductors (Item 7)
- A.5.6 Enclosure, partitions or bushings (Item 8)
- A.5.7 Contacts of removable part (Item 9)
- A.6 Making and breaking tests [Go to Page]
- A.6.1 General
- A.6.2 Clearance between phases and to earth (Items 1 and 2)
- A.6.3 Enclosure and compartment volume (Item 3)
- A.6.4 Insulating gas (Item 4)
- A.6.5 Conductors (Items 5 and 6)
- A.6.6 Insulating supports (Items 7, 8 and 9)
- A.7 Internal arc fault tests [Go to Page]
- A.7.1 General
- A.7.2 Clearance between phases and to earth (Items 1 and 2)
- A.7.3 Compartment volume (Item 3)
- A.7.4 Pressure of insulating gas (Item 4)
- A.7.5 Material in the region of arc initiation (Items 5, 6, 7 and 8)
- A.7.6 Pressure relief opening devices (Items 9, 10 and 11)
- A.7.7 Enclosure and compartments (Items 12, 13, 14 and 15)
- A.8 Rationale for extension criteria with respect to arc fault ratings and installation conditions [Go to Page]
- A.8.1 General
- A.8.2 Rated arc fault current and duration (items 1 and 2)
- A.8.3 Rated voltage (item 3)
- A.8.4 Rated frequency (item 4)
- A.8.5 Arrangement of assembly (items 5, 6 and 7)
- A.8.6 Indoor or outdoor installation (item 8)
- A.8.7 Type of accessibility (item 9)
- A.8.8 Accessible sides (item 10)
- Annex B (informative) Examples for the extension of validity of type tests [Go to Page]
- B.1 General
- B.2 Design modification of a cable terminal in air insulated switchgear (AIS)
- Figure B.1 – Cable terminals in the connection compartment of air insulated switchgear
- B.3 Design modification of an AIS bus riser functional unit by adding current transformers
- Table B.1 – Affirmation of extension criteria with respect to dielectric withstand performance of a functional unit
- Figure B.2 – Addition of block-type current transformers into the bus riser functional unit of air insulated switchgear
- Table B.2 – Affirmation of extension criteria with respect to short-time current withstand performance of a functional unit
- B.4 Design modification of a key-lock in the door of a functional unit of AIS
- B.5 Extension of a ring-main unit (GIS) to functional units with larger width
- Figure B.3 – Special type of key-lock as replacement for a standard key-lock in the door of air insulated switchgear
- Figure B.4 – Front view and top cross sectional view of a combinationof functional units making up a ring-main unit
- B.6 Extension of a family of gas insulated switchgear (GIS) by a functional unit
- Table B.3 – Affirmation of extension criteria with respectto temperature rise performance of a ring-main-unit
- Figure B.5 – Cross-section of two different functional units of GIS
- Table B.4 – Affirmation of extension criteria with respect to internal arcclassification of a GIS circuit-breaker compartment
- Bibliography [Go to Page]
