AS/NZS IEC 60947.7.3:2015 pdf download – Low-voltage switchgear and controlgear Part 7.3: Ancillary equipment—Safety requirements for fuse terminal blocks.
I General
1.1 Scope
This part of IEC 60947 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.
They are intended for installation in electrical equipment with enclosures which surround the fuse terminal blocks to such an extent that they are accessible only with the aid of a tool.
For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection.
NOTE This standard may be used as a guide for fuse terminal blocks for the reception of special cartridge fuse- links which do not meet the requirements of IEC 60127-2.
The object of this standard 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.
This standard may be 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, etc.;
– fuse terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc.
Where applicable in this standard, the term clamping unit has been used instead of the term terminal. This is taken into account in case of reference to IEC 60947-1.
1.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (Including any amendments) applies.
IEC 60127-1:2006, Miniature fuses — Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links
IEC 60127-2:2003, Miniature fuses — Part 2: Cartridge fuse-links Amendment 1 (2003)
IEC 60216-1:2001, Electrical insulating materials — Properties of thermal endurance — Part 1:
Ageing procedures and evaluation of test results
IEC 60695-11-5:2004, Fire hazard testing— Part 11-5: Test flames — Needle flame test method
— Apparatus, confirmatory test arrangement and guidance
5 Product information 5.1 Marking A fuse terminal block shall be marked in a durable and legible manner with the following: a) the name of the manufacturer or a trade mark, by which the manufacturer can be readily identified; b) a type reference permitting its identification in order to obtain relevant information from the manufacturer or his catalogue; c) energy flow direction, if required to ensure protection against electric shock, according to 7.1 .8, e.g. line-load marking or ?. 5.2 Additional information The following information shall be stated by the manufacturer, if applicable, e.g in the manufacturer’s data sheet or catalogue or on the packing unit: a) IEC 60947-7-3, if the manufacturer claims compliance with this standard; b) the rated cross-section; c) the rated connecting capacity, if different from Table 2 of IEC 60947-7-1 , including the number of conductors simultaneously connectable; d) the rated insulation voltage (U i ) of the terminal block base and the fuse-carrier, if applicable; e) the working voltage or working voltage range, primarily determined by the fuse-link or by additional components, e.g. illuminated indicators; f) rated impulse withstand voltage (U imp ); NOTE This value may be marked on the fuse terminal block only if the rated insulation voltage (U i ) or the working voltage is also marked on the fuse terminal block, e.g. 250 V/4 kV. g) rated value of the power dissipation for overload and short-circuit protection (P V ) and rated current of the fuse-link as declared by the manufacturer − in case of separate arrangement, − in case of compound arrangement; h) rated value of the power dissipation for exclusive short-circuit protection (P VK ) and rated current of the fuse-link as declared by the manufacturer − in case of separate arrangement, − in case of compound arrangement; i) operating conditions, if different from Clause 6; j) size of the fuse-link.