supply of contactor unit assemblycontactor unit assembly,contactor unit assembly to drg.no.rdso/s.10911 alt-6 for electric point machine rotary type. (1) the contact resistance of all electrical contacts in this unit shall not exceed 0.03 ohms when carrying a direct current of 100 ma. (2) the contact pressure of electrical contacts in closed position when measured very near the point of contact shall not be less than 275 gm. (3) the insulation resistance shall not be less than 10 meg ohms immediately after applying a test voltage of 2000 v-ac-50hz for 1 minute between all parts of electric circuits and other metallic parts insulated therefrom in the assembled condition.