Cold conductor structural element - contg. current-conducting body of vanadium sesquioxide doped with preg. chromium oxide or aluminium oxide

摘要

Passive, electrical cold-conducting structural element with 2 terminals and a +ve resistance temp. coefft., contains a current-conducting body (1) of V2O3 doped with 0.1-5 mol.% of another metal oxide. Pref. (1) has nominal compsn. (V1-xCrx)2O3 where 0.005 = x =0.02, or (V1-yAly)2O3 where 0.005 = y =0.02, and in an esp. cylindrical or prismatic sinter-body, esp. having density 3 g/cm2 and wt. 1-20 g. Structural element is pref. used as heat-controlled overcurrent fuse element at current conducting body temp. of 20-200 degrees C, esp. with a switch in series or in parallel. Transmission values 1000-17000 A2 sec can be achieved when using structural element at current 15-100 A and operating voltage 220 v. Transmission integral 12(t).dt of power pack protected for temp.-dependent resistance for 6-100 A, 50-400 v, short circuit efficiency factor cos circle with radical sign is nearly equal 0.85 is 17000 A2 sec (where to is moment of current rise, ta is moment of current path disconnection and 1(t) is line current).