Abstract: The invention relates to a plug connector designed to transmit electric power via at least two contact parts which are mounted in a contact support and to cool same while transmitting electric power, each contact part comprising a connection element which is connected to an electric line. A supply line for supplying a cooling fluid is provided in a common cooling chamber delimited by a cooling housing, and a respective tube is arranged about each line in order to convey the cooling fluid away from the cooling chamber, wherein each connection element is at least partly arranged in the cooling housing and additionally comprises a tube receiving area for receiving the respective tube, in which the corresponding electric line is received such that a line cooling region is formed for the electric line, and the connection element comprises at least one opening for fluidically coupling at least the cooling chamber.

Abstract: The invention relates to an automatically quenching surge arrester arrangement with a surge arrester, which, on exceeding a given first voltage, transforms from a non-conducting into a conducting state and returns to the non-conducting state only when a much smaller second voltage is dropped below and with a switch mechanism reacting to current flow through the surge arrester, interrupting the current flow through the surge arrester and then automatically returning to the rest condition thereof. A simple, robust and compact assembly suitable for HF applications for such a surge arrester arrangement is achieved, whereby the switch mechanism reacts reversibly to the heat generated in the surge arrester by the current flow.