Cable fire blanket put through two arc-explosion tests
Samples survived 20 kA for 0.1 s and 15 kA for 1 s without puncture or ejected debris, under laboratory conditions.
The cable fire and explosion blanket was developed for the domestic power sector, with the blast layer and the fire layer integrated in one part that is simple to install and easy to clean. To characterise its behaviour under arcing faults, the same construction was tested twice at different magnitudes at the Suzhou Electrical Apparatus Science Academy.
First test: set at 12 kV, 20 kA, 50 kA peak, arcing for 0.1 s; measured 12.1 kV, 20.98 kA, 50.48 kA peak, 0.10611 s. Second test: set at 12 kV, 15 kA, 37.5 kA peak, arcing for 1 s; measured 12.1 kV, 16.6 kA, 37.9 kA peak, 1.04 s. In both cases the blanket showed no puncture and no ejection of debris. Reports 21X2782-S and 21X3104-S.
How to read this
These are results for a sample under specific laboratory conditions. Site behaviour depends on the fault energy, the cable arrangement, the number of layers and the quality of the fixing, so the test supports a design decision rather than a guarantee for every installation.