supply of contactor unit assembly , contactor unit assembly to drg.no.rdso/s.10911 alt-6 for electric point machine r otary 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 co ntacts in closed position when measured very near the point of contact shall not be less tha n 275 gm. (3) the insulation resistance shall not be less than 10 meg ohms immediately after ap plying a test voltage of 2000 v-ac-50hz for 1 minute between all parts of electric circuits and other metallic parts insulated there from in the assembled condition [ warranty period: 30 mo nths after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]