Switchgear assembly, and method for detecting and limiting the energy of a fault arc, in an insert of a switchgear cabinet a corresponding switching system

摘要

The invention relates to a switchgear assembly (sa) and a method for detecting a fault arc, wherein the switchgear assembly (sa) a switchgear cabinet (ss) with an insert (it), in which a during the occurrence of a short circuit selectively opened by means of a downstream circuit breaker (cbn) a protection chain, of the contacts, between which a switching arc occurs during the severing. In order to detect a fault arc in the insert to limit and at least, it is proposed that at different locations in the region of the insert (it) measuring points (mp1, mp2, mpt, mpl) are present, on which first and second measured values, wherein the first measured values of the temperature (tw) and / or light values (lw) and the second measured values of energy flow values (iw) are. A in the region of the insert (it) arranged evaluation - and - release electronics (aae) processes the measured values, a fault arc can be seen in the slide-in module (it) and determines on the basis of the locations at which the measuring points (mp1, mp2, mpt, mpl) are arranged, whether the fault arc behind the circuit breaker (cbn) is located. If this is the case, the circuit breaker (cbn) for limiting the flow of energy (i) is triggered.