Method of contact monitoring between conducting devices using potential detection e.g. for voltage breakdown protection in DC rail system

摘要

The method involves measuring the potential variation between the connected devices for a defined period with the contacts closed and converting it into a characteristic value, comparing this continually with the similarly derived value for the open contact state. If a similar value occurs to that for the closed state an electrical signal is made available for further processing An Independent claim is also included for an arrangement for carrying out the method