Voltage limiting device for measuring instrument, has voltage limiting unit with voltage sensor, which is formed such that sensor opens switch if voltage at input of limiting unit is greater than predetermined maximum voltage value

摘要

The device has a voltage limiting unit (10) with a switch provided between an input (11) and an output of the limiting unit. The limiting unit includes a voltage sensor (31), which is formed in such a manner that the sensor opens the switch if a voltage at the input of the limiting unit is greater than a predetermined maximum voltage value. The sensor closes the switch if the voltage at the input is smaller than maximum voltage value.