A method for increasing working timesetting time of monolithic tetracalcium phosphate cement paste formed by mixing a TTCP powder with an aqueous solution, which includes heating the TTCP powder, prior to the mixing, so that the TTCP powder is maintained at a temperature of 50-350\xb0 C. When such a clip axially projects beyond a foot part of the respective end electrode, the projecting region in a three-electrode arrester can be part of a short-circuit device which electrically connects to the middle electrode, potentially in combination with an auxiliary discharge path. Some of the control parameters, which apply to a given block, are calculated from audio information in one or more previous blocks.