Abstract:
The invention relates to a coil arrangement comprising an electric coil (10) and an armature (20) that can be moved between a first end position (I) and a second end position (II), an electronic switch (30) that can be switched between at least two switching states, a control and monitoring circuit (40) for generating a switching signal (ctrl) actuating the electronic switch (30), and an operating circuit (50) for providing an operating voltage (UN), and a current measuring signal (IM) representing a time curve of an electric current flowing in a coil circuit formed by means of the coil. The control and monitoring circuit (40) is further configured to carry out an inspection of the coil (10) using the current measuring signal (IM), namely, to determine whether an inductance L of the coil (10) shows a dependence on a time curve of the switching signal (ctrl), or a time curve that is corresponding to the time curve of the switching signal, for example. The electro-mechanical switch (100), in turn, comprises a first switching contact (101) that can be moved between a first switching position (i) and a second switching position (ii), a second switching contact (102), and a coil arrangement according to the invention for actuating the switching contact (101), whereas apart from such an electro-mechanical switch (100), the measurement transducer (Tr) also comprises a measurement circuit for receiving at least one pickup signal (s1) that is dependent upon a physical or chemical measurement variable, and/or represents a time curve of said measurement variable (x).