The circuit has two antiparallel diode circuits (R6,Ok1,OK2) that detect the half waves connected in series with a resistance (R1), whereby the output signals (neg, pos) of the diode circuits are separately fed to the inputs of an evaluation circuit. A pot...

Installation system for controlling an electrical building installation has a programmable computer unit for switching electrical loads (70-73). The computer unit has a number of function groups (I1-I4, ZE, ZA, AW) for controlling standard and central func...