Glossaries

Here you will find all of the main definitions on relating to fuses and electrical equipment.

Glossary For Low Voltage Fuses

“a” Fuselink (formerly Back-Up Fuselink) A current limiting fuselink capable of breaking under specified conditions all currents between the lowest current indicated on its operating time-current characteristic and its rated breaking capacity. Ambient Air Temperature (Ta) The ambient air temperature is that of the air surrounding the fuse (at a distance of about 1 m …

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Glossary For Low Voltage Switchgear & Control Gear

Circuit Breaker A switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time, and breaking currents under specified abnormal circuit conditions such as those of short circuit. Disconnector A mechanical switching device which, in the open position, complies with the requirements specified for the …

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North American Classes Of Fuses

The North American fuse industry has developed a number of Classes or Standards for fuses with voltage ratings of 600 volts or less. These classes include basic physical specifications and performance requirements.

Class CC 600V; up to 30A; 200kA Cylindrical contact, 10 x 38mm with rejection feature. Class G 300V; up to 60A; 100kA Cylindrical contact, …

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