MONITORING APPARATUS

摘要

Monitoring apparatus (100, 200, 300) for registration and warning of overtemperature, particularly in connection with harmful heat development in electric installations, as for example outlets, switches and fuse equipment. The apparatus provides for timely warning of heat development, so that overheating and damage is avoided, whereby the operation of electric installation equipment for mounting in electric installations, will have a significantly improved safety. The temperature registration is performed in a unit (100) by means of a sensor (1) which provides an electrical magnitude that is influenced by the temperature, for example a thermistor, which is a temperature-dependent resistor. When a low current is applied to such a component, it will result in a temperature-dependent voltage drop that is measured and gives a direct measure of the temperature. If the temperature exceeds a given value, an alarm unit (200) is activated, and this is turn can provide for remote warning of a central block or plant (300).