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BS EN IEC 60947-3:2021 Low-voltage switchgear and controlgear - Switches, disconnectors, switch-disconnectors and fuse-combination units, 2022
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and index of terms [Go to Page]
- 3.1 General
- 3.2 Alphabetical index of terms
- 3.3 General terms
- 4 Classification [Go to Page]
- 4.1 According to the utilization category
- 4.2 According to the method of operation [Go to Page]
- 4.2.1 Manually operated equipment
- 4.2.2 Remotely operated equipment
- 4.3 According to suitability for isolation
- 4.4 According to the degree of protection provided
- 4.5 Summary of symbols for equipment types
- 5 Characteristics [Go to Page]
- 5.1 Summary of characteristics
- Tables [Go to Page]
- Table 1 – Summary of equipment definitions
- 5.2 Type of equipment
- 5.3 Rated and limiting values for the main circuit [Go to Page]
- 5.3.1 General
- 5.3.2 Rated voltages
- 5.3.3 Currents
- 5.3.4 Rated frequency
- 5.3.5 Rated duty
- 5.3.6 Normal load and overload characteristics
- 5.3.7 Short-circuit characteristics
- 5.4 Utilization category
- Table 2 – Utilization categories
- 5.5 Control circuits
- 5.6 Auxiliary circuits
- 5.7 Relays and releases
- 5.8 Co-ordination with short-circuit protective devices (SCPD)
- 6 Product information [Go to Page]
- 6.1 Nature of information
- 6.2 Marking
- Table 3 – Product information
- 6.3 Instructions for installation, operation and maintenance, decommissioning and dismantling
- 7 Normal service, mounting and transport conditions
- 8 Constructional and performance requirements [Go to Page]
- 8.1 Constructional requirements [Go to Page]
- 8.1.1 General
- 8.2 Performance requirements [Go to Page]
- 8.2.1 Operating conditions
- 8.2.2 Temperature-rise
- 8.2.3 Dielectric properties
- 8.2.4 Ability to make and break under no-load, normal load and overload conditions
- Table 4 – Verification of rated making and breaking capacities (see 9.3.4.4) – Conditions for making and breaking corresponding to the various utilization categories
- Table 5 – Verification of operational performance –Number of operating cycles corresponding to the rated operational current
- Table 6 – Test circuit parameters for Table 5 [Go to Page]
- 8.2.5 Ability to make, break or withstand short-circuit currents
- 8.2.6 Void
- 8.2.7 Additional performance requirements for equipment suitable for isolation
- 8.2.8 Critical load current performance: DC equipment
- 8.2.9 Overload requirements for equipment incorporating fuses
- 8.3 Electromagnetic compatibility (EMC) [Go to Page]
- 8.3.1 General
- 8.3.2 Immunity
- 8.3.3 Emission
- Table 7 – Immunity tests a
- Table 8 – Emission limits
- 9 Tests [Go to Page]
- 9.1 Kinds of test [Go to Page]
- 9.1.1 General
- 9.1.2 Type tests
- 9.1.3 Routine tests
- 9.1.4 Sampling tests
- 9.1.5 Special tests
- 9.2 Compliance with constructional requirements [Go to Page]
- 9.2.1 General
- 9.3 Performance [Go to Page]
- 9.3.1 General
- 9.3.2 Test sequences
- Table 9 – List of type tests applicable to a given equipment [Go to Page]
- 9.3.3 General test conditions
- Table 10 – Overall scheme of test sequences [Go to Page]
- 9.3.4 Test sequence I: general performance characteristics
- Table 11 – Test sequence I: general performance characteristics [Go to Page]
- 9.3.5 Test sequence II: operational performance capability
- Table 12 – Temperature-rise limits for terminals and accessible parts
- Table 13 – Test sequence II: operational performance capability [Go to Page]
- 9.3.6 Test sequence III: short-circuit performance capability
- Table 14 – Test sequence III: short-circuit performance capability [Go to Page]
- 9.3.7 Test sequence IV: conditional short-circuit current
- Table 15 – Test sequence IV: conditional short-circuit current –circuit-breaker protected
- Table 16 – Test sequence IV: conditional short-circuit current – fuse protected [Go to Page]
- 9.3.8 Test sequence V: overload performance capability
- 9.3.9 Test sequence VI: critical load current performance of equipment with a DC rating
- Table 17 – Test sequence V: overload performance capability
- 9.4 Electromagnetic compatibility tests [Go to Page]
- 9.4.1 General
- Table 18 – Number of operating cycles corresponding to the critical load current
- Table 19 – Test circuit parameters for Table 18
- Table 20 – Test sequence VI: critical load current performanceof equipment with a DC rating [Go to Page]
- 9.4.2 Immunity
- 9.4.3 Emission
- 9.5 Special tests [Go to Page]
- 9.5.1 Mechanical and electrical durability
- 9.5.2 Mechanical durability
- 9.5.3 Electrical durability
- 9.5.4 Damp heat, salt mist, vibration and shock
- Annexes [Go to Page]
- Annex A (normative) Equipment for direct switching of a single motor [Go to Page]
- A.1 General
- A.2 Rated [Go to Page]
- A.2.1 Intermittent periodic duty or intermittent duty
- A.2.2 Temporary duty
- A.3 Making and breaking capacities
- A.4 Utilization category
- Table A.1 – Utilization categories
- Table A.2 – Rated making and breaking capacity conditionscorresponding to several utilization categories [Go to Page]
- A.5 Operational performance
- Table A.3 – Relationship between current broken Ic and off-time for the verification of the rated making and breaking capacities
- Table A.4 – Operational performance –Conditions for making and breaking corresponding to several utilization categories [Go to Page]
- A.6 Mechanical durability
- A.7 Electrical durability
- A.8 Verification of making and breaking capacities
- A.9 Operational performance test
- A.10 Special tests [Go to Page]
- A.10.1 General
- A.10.2 Mechanical durability test
- A.10.3 Electrical durability test
- A.11 Critical load current performance for DC equipment
- Table A.5 – Verification of the number of on-load operating cycles –Conditions for making and breaking corresponding to several utilization categories
- Annex B (informative) Items subject to agreement between manufacturer and user
- Annex C (normative) Single pole operated three-pole switches [Go to Page]
- C.1 General
- Figure C.1 – Typical arrangements [Go to Page]
- C.2 Tests
- C.3 Test set-up and sequence [Go to Page]
- C.3.1 Making and breaking capacities (9.3.4.3) and operational performance (9.3.5.2)
- C.3.2 Fuse protected short-circuit test (9.3.7.3)
- C.4 Condition of equipment after tests
- C.5 Instructions for use
- Annex D (normative) Switches, disconnectors, switch-disconnectors and fuse-combination units for use in photovoltaic (PV) DC applications [Go to Page]
- D.1 General [Go to Page]
- D.1.1 Background
- D.1.2 Object
- D.2 Normative references
- D.3 Terms and definitions
- D.4 Classification [Go to Page]
- D.4.1 According to the utilization category
- D.5 Characteristics
- Table D.1 – Utilization categories [Go to Page]
- D.6 Product information
- D.7 Normal service, mounting and transport conditions
- D.8 Constructional and performance requirements
- Table D.2 – Service arrangements
- Table D.3 – Environmental conditions
- Table D.4 – Rated impulse withstand levels for PV switches, PV disconnectors, PV switch-disconnectors or PV fuse-combination units
- Table D.5 – Verification of rated making and breaking capacities (see 9.3.4.4) – Conditions for making and breaking corresponding to the DC-PV category
- Table D.6 – Number of operating cycles
- Table D.7 – Test circuit parameters for Table D.6 [Go to Page]
- D.9 Tests
- Table D.8 – Overall scheme of test sequences
- Table D.9 – Number of operating cycles corresponding to the critical load current
- Table D.10 – Test circuit parameters for Table D.9
- Annex E (normative) Additional requirements for LV switchgear intended for connection of aluminium conductors [Go to Page]
- E.1 Object
- E.2 Normative references
- E.3 Terms, definitions and index of terms
- E.4 Classification
- E.5 Characteristics
- E.6 Product information [Go to Page]
- E.6.1 Nature of information
- E.6.2 Marking
- E.6.3 Instructions for installation, operation and maintenance, decommissioning and dismantling
- E.7 Normal service, mounting and transport conditions
- E.8 Constructional and performance requirements
- E.9 Tests [Go to Page]
- E.9.1 General
- Table E.1 – List of tests for terminal connections a with aluminium cables [Go to Page]
- [Go to Page]
- E.9.2 Current cycling test
- Figures [Go to Page]
- Figure E.1 – General test arrangement
- Figure E.2 – Mounting of terminals for the current cycling test
- Table E.2 – Conductor length for current cycling test as per conductor cross-section
- Table E.3 – Equalizer dimensions
- Table E.4 – Starting test current for the current cycling test [Go to Page]
- [Go to Page]
- E.9.3 Mechanical properties of terminals
- Table E.5 – Example of stability factor calculation [Go to Page]
- [Go to Page]
- E.9.4 Test for insertability of unprepared round aluminium conductors having the maximum cross-section
- Table E.6 – Test values for flexion and pull-out test for cables
- Table E.7 – Test aluminium cable for test currents up to 800 A a, d
- Table E.8 – Test aluminium bars for test currents above 150 A and up to 3 150 A a, f
- Annex F (informative) Power loss [Go to Page]
- F.1 General
- F.2 Test methods [Go to Page]
- F.2.1 General
- F.2.2 General case for AC switches and/or disconnectors
- F.2.3 General case for AC fused combination units and fuse disconnectors
- F.2.4 Switches and/or disconnectors of rated current not exceeding 400 A
- F.2.5 Fused combination units and fuse disconnectors of rated current not exceeding 400 A
- F.3 Test procedure
- Figure F.1 – Example of power loss measurement according to F.2.2
- Figure F.2 – Example of power loss measurement according to F.2.3
- Figure F.3 – Example of power loss measurement according to F.2.4
- Figure F.4 – Example of power loss measurement according to F.2.5
- Bibliography [Go to Page]
