  The effect of electrical resistivity switching in nanographite films is
described. In difference with cases published elsewhere the switching in
nanographite films occurs from stable high conductive to metastable low
conductive state. Critical current of switching varies in the range 10-500 mA
and can be increased up to values appropriate for using of nanographite samples
in power grids as contact-less current limiters and circuit breakers. The
possible mechanisms of switching phenomenon in nanographite films are
discussed.
