AS 2005.10:1988 pdf – Low vOLTAGE FUSES—FUSES WITH ENCLOSED FUSE-LINKS Part 10—GENERAL REQUIREMENTS

AS 2005.10:1988 pdf – Low vOLTAGE FUSES—FUSES WITH ENCLOSED FUSE-LINKS Part 10—GENERAL REQUIREMENTS.
7.1.1 Replacement of fuse-links. It shall be possible to replace the fuse-links easily and safely.
7.1.2 Connections including terminals. The fixed connections shall be such that the necessary contact force is maintained under the conditions of service and operation.
No contact force on connections shall be transmitted through insulating material other than ceramic or other material with characteristics not less suitable than ceramic, unless there is sufficient resilience in the metallic parts to compensate for any possible shrinkage or other deformation of the insulating material. Tests arc specified in other Standards of the AS 2005 series as appropriate.
Terminals shall be such that they cannot turn or be displaced when the connecting screws arc tightened and such that the conductors cannot be displaced. The parts gripping the conductors shall be of metal and shall have such a shape that they cannot unduly damage conductors.
Terminals shall be so arranged that they arc readily accessible (after removal of covers, if any) under the intended conditions of installation.
NOTE: Other rcquircmcnts concerning lenninals are under
con%Idcralion.
7.1.3 Fuse-contacts. Fuse-contacts shall be such that the necessary contact forcc is maintained under the conditions of service and operation, in particular under the conditions corresponding to Clause 7.5.
Contact shall be such that the electromagnetic forces occurring during operation under conditions in accordance with Table 8.2. shall not impair the electrical connections between—
(a) the fuse-base and the fuse-carrier;
(h) the fuse-carrier and the fuse-link;
(c) the fuse-link and the fuse-base, or if applicable. any other support.
In addition, the construction and material of the fuse contacts shall ensure that, when the fuse is properly installed and service conditions are normal, adequate contact is maintained
(a) after repeated engagement and disengagement:
(b) after being left undisturbed in service for a long period (see Clause 8.10).
Fuse contacts of copper alloy shall be free from season cracking.
These requirements arc verified by the tests according to Clause 8.4.3.4 and 8.11.2.1.
7.2 IYSULATING PROPFRTIES. The fuses shall be such that they do not lose their insulating properties at the voltage to which they are subjected in normal service. A fuse shall be deemed to satisfy this condition if it passes the test for verification of insulating properties in accordance with Clause .2.