Test Dummy
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Dummy fuse-links and replica

Production, inspection and reconditioning of dummy fuse links for temperature-rise tests for the following fuse systems:

NH-system [IEC 60269, VDE 0636]
C-class
D (Diazed) / D0 (Neozed) / NF / NF / BS [IEC 60269, VDE 0636]
G-system [IEC 60127, VDE 0820]
Automotive types [ISO 8820]

Power output according to standard or customer specifications. Further types on request.

Specimens

We supply you with common specimens, such as indenters or impactors for material tests and customer-specific test equipment.

What are dummy fuse-links or replica used for?

Fuse links (fuses) are used in fuse holders in various fuse systems, but also in fused switchgear and fuse terminal blocks of the IEC 60947 standards. To determine the thermal behavior - required by the device standards - these devices are subjected to temperature rise tests. For this purpose, they are loaded with a test current until a thermally steady state is established. Depending on the size of the device, this can take a few minutes or hours.

During temperature rise tests with fuse links, one is faced with the problem that commercially available fuse links have an individual temperature-dependent resistance. In the worst case, excess temperatures can lead to irreversible aging processes with permanent changes in the resistance values ??(resistance drift).

The desire for comparable and reproducible test results therefore led to the use of dummy fuse links or fuse replica for temperature rise tests, which is prescribed in many standards. Dummy fuse links are characterized by an almost constant specific electrical resistance and good long-term stability.