BS 7656:1993+A1:2013

This standard BS 7656:1993+A1:2013 Specification for Low-voltage pole-mounting fuses (cut-outs). 400 A rating is classified in these ICS categories:

• 29.120.50 Fuses and other overcurrent protection devices

This standard specifies the requirements for single-pole fuses (cut-outs) of 400 A rating which are mounted on poles for low-voltage network protection, sectioning or sub-fusing. The fuses (cut-outs) may be mounted on a high-voltage/low-voltage transformer pole where the high-voltage equipment earth is led down the pole. They are for use on a single phase, or one phase of a three phase low-voltage public electricity supply system with a maximum voltage up to 440 V a.c. and at a frequency of 50 Hz, the neutral being effectively earthed.

The provisions of the general rules dealt with in BS EN 60947-1 are applicable to this standard where specifically called for.

NOTE Clauses and subclauses, tables, figures and annexes of the general rules thus applicable are identified by reference to BS EN 60947-1:2007+A1:2011, for example BS EN 60947-1:2007 +A1:2011, 1.2.3, BS EN 60947-1:2007+A1:2011, Table 5, or BS EN 60947-1:2007+A1:2011, Annex A.

Specifies the requirements and tests for single-pole fuses sectioning or sub-fusing for use on single phase or one phase of a three phase public electricity 440 V a.c. (max) supply system at 50 Hz with the neutral effectively earthed.