supply of vcb for use in vande bharat , vcb for use in vande bharat trainsets to clause no. 4.27 of rdso specification no. rds o/pe/spec/emu/0196-2019 rev-0 along with latest annexure and addendum/corrigendum with compl ete adherence to overall general arrangement to icf drg no. icf/sk3-7-2-075, ip67 protection class f or external portion and ip20 for internal portion, vcb shall be provided with minimum 4 no + 4 nc au xiliary contacts and technical parameters confirming to clw spec. clw/es/c-47 alt-i. [ warranty per iod: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]