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BSI 23/30473799 DC 2023

BSI 23/30473799 DC 2023

$13.70

BS EN IEC 60947-7-1. Low-voltage switchgear and controlgear – Part 7-1. Ancillary equipment. Terminal blocks for copper conductors

Published By Publication Date Number of Pages
BSI 2023 52
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PDF Catalog

PDF Pages PDF Title
1 30473799-NC.pdf
3 121A_560e_CD (2).pdf
7 FOREWORD
9 1 Scope
2 Normative references
10 3 Terms and definitions
4 Classification
11 5 Characteristics
5.1 Summary of characteristics
5.2 Type of terminal block
5.3 Rated and limiting values
5.3.1 Rated voltages
5.3.2 Short-time withstand current
5.3.3 Standard cross-section
5.3.4 Rated cross-section
5.3.5 Rated connecting capacity
12 6 Product information
6.1 Marking
6.1.1 Manufacturer or trade mark
6.1.2 Type reference
6.1.3 Very small terminal blocks
6.2 Additional information
7 Normal service, mounting and transport conditions
13 8 Constructional and performance requirements
8.1 Constructional requirements
8.1.1 Clamping units
8.1.2 Mounting
8.1.3 Clearances and creepage distances
8.1.4 Terminal identification and marking
8.1.5 Resistance to abnormal heat and fire
14 8.1.6 Rated cross-section and rated connecting capacity
8.2 Performance requirements
8.2.1 Temperature rise
8.2.2 Dielectric properties
8.2.3 Short-time withstand current
8.2.4 Voltage drop
8.2.5 Electrical performance after ageing (for screwless-type terminal blocks only)
15 8.2.6 Contact pressure via insulating material (CoPI)
8.3 Electromagnetic compatibility
9 Tests
9.1 Kinds of test
9.2 General
16 9.3 Verification of mechanical characteristics
9.3.1 General
9.3.2 Attachment of the terminal block on its support
9.3.3 Mechanical properties of clamping units
9.3.3.1 Test of mechanical strength of clamping units
17 9.3.3.2 Testing for damage to and accidental loosening of conductors of a terminal block (flexion test)
9.3.3.3 Pull-out test
9.3.3.4 Verification of rated cross-section and rated connecting capacity
18 9.3.3.5 Verification of rated cross-section (special test with gauges)
9.4 Verification of electrical characteristics
9.4.1 General
9.4.2 Verification of clearances and creepage distances
9.4.2.1 General
9.4.2.2 Clearances
9.4.2.3 Creepage distances
19 9.4.3 Dielectric tests
9.4.4 Verification of the voltage drop
20 9.4.5 Temperature-rise test
21 9.4.6 Short-time withstand current test
9.4.7 Ageing test (for screwless-type terminal blocks only)
22 9.4.8 Contact pressure via insulating material (CoPI) test
9.4.8.1 Cold storage (preconditioning step 1)
9.4.8.2 Dry heat storage (preconditioning step 2)
23 9.4.8.3 Current cycling ageing test
9.5 Verification of thermal characteristics
25 9.6 Verification of EMC characteristics
9.6.1 Immunity
9.6.2 Emission
35 Annex A Vacant
36 Annex B (informative) Items subject to agreement between manufacturer and user
37 Annex C (informative) Examples for rating connecting capacity based on both metric conductors and AWG/kcmil
C.1 Example 1: Testing with metric conductors and declaring values for metric and AWG/kcmil
C.2 Example 2: Testing with metric and AWG/kcmil conductors and declaring values for metric and AWG/kcmil
C.3 Example 3: Testing with AWG/kcmil conductors and declaring values for metric and AWG/kcmil
38 Annex D (normative) Requirements for test disconnect terminal blocks
D.1 Scope
D.2 Normative references
D.3 Terms and definitions
D.4 Classification
D.5 Characteristics
D.5.1 Summary of characteristics
39 D.5.2 Type of terminal block
D.5.3 Rated and limiting values
D.5.3.1 Rated voltages
D.5.3.2 Short-time withstand current
D.5.3.3 Standard cross-section
D.5.3.4 Rated cross-section
D.5.3.5 Rated connecting capacity
D.5.3.6 Number of operating cycles
D.6 Product information
D.6.1 Marking
40 D.6.2 Additional information
D.7 Normal service, mounting and transport conditions
D.8 Constructional and performance requirements
D.8.1 Constructional requirements
D.8.1.1 Clamping units
D.8.1.2 Mounting
D.8.1.3 Clearances and creepage distances
41 D.8.1.4 Terminal identification and marking
D.8.1.5 Resistance to abnormal heat and fire
D.8.1.6 Rated cross-section and rated connecting capacity
D.8.1.7 Disconnect unit
D.8.2 Performance requirements
D.8.2.1 Temperature rise
D.8.2.2 Dielectric properties
42 D.8.2.3 Short-time withstand current
D.8.2.4 Voltage drop
D.8.2.5 Electrical performance after ageing (for test disconnect terminal blocks with screwless-type clamping units with screw-type or screwless-type disconnect units only)
D.8.2.6 Contact pressure via insulating material (CoPI) (for test disconnect terminal blocks)
D.8.3 Service life
43 D.8.4 Electromagnetic compatibility
D.9 Tests
D.9.1 Kinds of test
D.9.2 General
D.9.3 Verification of mechanical characteristics
D.9.4 Verification of electrical characteristics
D.9.4.1 General
The verification of electrical characteristics includes the following:
D.9.4.2 Verification of clearances and creepages distances
D.9.4.3 Dielectric tests
D.9.4.4 Verification of the voltage drop
46 D.9.4.5 Temperature-rise test
D.9.4.6 Short-time withstand current test
50 D.9.4.7 Ageing test for test disconnect terminal blocks with screwless-type clamping units
D.9.5 Verification of thermal characteristics
D.9.6 Service life
D.9.7 Verification of EMC characteristics
51 Annex E (informative) Electrical and mechanical parameters for terminal blocks used with conductors of rated cross-section above 300 mm²/600 kcmil
52 Bibliography

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