WIRE NEWS WN March 2019 | Page 6

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safety due to the increased strength of ISA-CON®.
This allows for a reduction in weight and space,
which is, for example, usually very relevant in the
automotive sector.
Screws for indirect use
An indirect connection replaces a previously non-
current-carrying component, such as a steel screw,
which presses a contact onto a bus bar. The pressed
contact surface here and thus the component surface
can be reduced, since part of the current can flow
through the screw. The screw offers additional safety
due to its high conductivity. The customer feedback
at Isabellenhütte has been very positive so far. The
direct use of ISA-CON®450 bolts in particular has a
very good cost-benefit ratio. Mr. Brockhaus, Business
Development manager at Isabellenhütte, says the
following about this: “If heat development, electric
conductivity and contact resistances are insignificant
in application, steel or simple copper alloys, such as
bronze or brass, may be sufficient. However, if the
aforementioned problems occur, ISA-CON®450 is an
ideal problem-solving alloy.” The alloy is of interest
for all types of mechanically-stressed plug connectors,
which require high conductivity and a high level of
reliability.
.
Images: ©Isabellenhütte Heusler GmbH & Co. KG
Top view (above) Steel bolt, (below) ISA-CON®450 bolt: To analyse the heat generation in the
resistor four different loading increments are used: 150 A, 200 A, 250 A, 300 A. The load time always
takes 30 sec. During load time an infrared video is recorded. At the end of the video the above
shown pictures are made for temperature reporting.
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WIRE NEWS March 2019