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Patent: Electrical protective breaking device with memory element
and memory alloys therefor.


Registered
in Germany (DE 198 51 311 A1),
in Europe (EP 0 999 570 A1) und
in the USA (US 942.640-12)

Priority: 06.11.1998

Inventor and patent holder:
Dr. V. Prieb,


Abstract:

Object of the Invention:
A new electrical low-voltage or high-voltage fuse (breaking memory-fuse) with a breaking insert made of a Cu-base memory alloy that is especially suitable for electrical aims.

Fuse construction:
The memory insert makes possible a new simplified fuse construction with a new-formed casing. The insert made of a Cu-base alloy can be at the same time enlarge to contact blades and can serve after its rupturing as a triggering indicator.

Properties:

In the case of overload or short-circuit currents in the electrical power system, the insert securely fitted in the fuse breaks itself due to increasing internal mechanical stress at a point with a calibrated breaking limit.

New Cu-base memory alloys with special for electrical engineering suitable properties are invented too.

Application fields:
  • Electronics and electrical engineering, in electrical devices, for switching them off without arcing when they are subjected to thermal loads, overload and short circuit currents.

  • Especially suitable to protect of the 42-V direct current board net of future auto cars, where the arcing danger is especially very high at the current interrupting.
More:
Patent full script
, emglish, PDF-file