IEC 60947-7-3:2009
Current
The latest, up-to-date edition.
Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French, Spanish, Castilian
04-20-2009
FOREWORD
INTRODUCTION
1 General
1.1 Scope
1.2 Normative references
2 Definitions
3 Classification
4 Characteristics
4.1 Fuse-links
4.2 Rated power dissipation value
4.2.1 Overload and short-circuit protection (P[V])
4.2.2 Exclusive short-circuit protection (P[VK])
4.3 Rated and limiting values
4.3.1 Rated voltages
4.3.3 Standard cross-sections
4.3.4 Rated cross-section
4.3.5 Rated connecting capacity
4.3.6 Working voltage
5 Product information
5.1 Marking
5.2 Additional information
5.3 Marking on the packing unit
6 Normal service, mounting and transport conditions
6.1.1 Ambient temperature
7 Constructional and performance requirements
7.1 Constructional requirements
7.1.1 Clamping units
7.1.2 Mounting
7.1.3 Clearances and creepage distances
7.1.4 Terminal identification and marking
7.1.6 Rated cross-section and rated connecting capacity
7.1.8 Actuating conditions
7.2 Performance requirements
7.2.1 Mechanical requirements during actuation
7.2.2 Electrical requirements
7.2.3 Thermal requirements
7.3 Electromagnetic compatibility (EMC)
8 Tests
8.1 Kinds of test
8.2 General
8.3 Verification of mechanical characteristics
8.3.1 General
8.3.2 Attachment of the fuse terminal block on its support
8.3.3 Mechanical properties of clamping units of a fuse
terminal block
8.3.4 Compatibility between fuse terminal blocks and the
fuse-link
8.3.5 Mechanical strength of the connection between the
terminal block base and the fuse-carrier
8.4 Verification of electrical characteristics
8.4.1 General
8.4.3 Dielectric tests
8.4.4 Contact resistance
8.4.5 Temperature rise of clamping units
8.4.7 Ageing test (for screwless-type fuse terminal
blocks only)
8.5 Verification of thermal characteristics
8.5.1 General
8.5.2 Rated power dissipation
8.5.3 Durability
8.5.4 Needle flame test
8.6 Verification of EMC characteristics
Annex A (normative) Gauges
Annex B (informative) Power dissipation values P[V] and P[VK]
Annex C (normative) Order of tests and number of
specimens
Bibliography
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