What is BS EN 60947-7-3 - Safety requirements for fuse terminal blocks about?
BS EN 60947-7 is a European standard on Low-voltage switchgear and controlgear - Ancillary equipment. BS EN 60947-7-3 is a third part of the multi-series standard that specifies the safety requirements for fuse terminal blocks. BS EN 60947-7-3 applies to fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links in accordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking capacity of 1 500 A. For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection.
BS EN 60947-7-3 specifies safety requirements and test methods for the mechanical, electrical, and thermal characteristics of fuse terminal blocks, to ensure the compatibility between terminal blocks and standardized fuse links.
BS EN 60947-7-3 used as a guide for:
- Fuse terminal blocks requiring the fixing of special devices to the conductors, for example, quick-connect terminations or wrapped connections
- Fuse terminal blocks provide direct contact to the conductors by means of edges or points penetrating the insulation, for example, insulation displacement connections
Who is BS EN 60947-7-3 - Safety requirements for fuse terminal blocks for?
BS EN 60947-7-3 on safety requirements for fuse terminal blocks is useful for:
- Manufacturers and suppliers of low-voltage switchgear and controlgear
- Test /service providers for fuse terminal blocks
- Fuse terminal blocks manufacturers and suppliers
- Electricians
- Ancillary equipment manufactures
Why should you use BS EN 60947-7-3 - Safety requirements for fuse terminal blocks?
Fuse terminal blocks are useful for protecting the feed-through connection with a separate fuse. Fuse terminal blocks are made up of one terminal block bottom section with a fuse insertion carrier.
The object of BS EN 60947-7-3 is to specify safety requirements and test methods for the mechanical, electrical, and thermal characteristics of fuse terminal blocks, to ensure the compatibility between terminal blocks and standardized fuse links.
BS EN 60947-7-3 specifies safety requirements and test methods for the mechanical, electrical, and thermal characteristics of fuse terminal blocks. By this means, it is possible to judge the quality of the
product “fuse terminal blocks.” Adhering to BS EN 60947-7-3 manufacturers of fuse terminal blocks can assure increased safety by isolating and overload and short-circuit protection.
BS EN 60947-7-3 on fuse terminal blocks provide useful guidance on requirements and product designing information for fuse terminal blocks, which helps fuse terminal blocks manufacturers enhance the quality and safety of their products.
BS EN 60947-7-3 provides guidance on protection against electric shock, mechanical hazards, the spread of fire, resistance to mechanical stresses, temperature limits, overload and short-circuit protection, risk assessment, and more, ensuring safety and protection in ancillary equipment.
What is changed since the last update?
BS EN 60947-7-3:2009 supersedes BS EN 60947-7-3:2002 which is withdrawn.
BS EN 60947-7-3:2009 includes some technical changes with respect to BS EN 60947-7-3:2009. These include:
- Requirements regarding clearances and creepage distances replaced
- Requirements for the test of the mechanical strength of the clamping units improved
- Requirements for tightening torques for the tests improved and referenced to Table 4 of EN 60947-1
- Requirements for the resistance and the dimensions of dummy fuse-links specified
