Tender For bid to ras supply of rccb - residual current operated circuit - breakers as per is 12640 (q3) , power contactors as per is 13947 - 4 - 1 (q3) , voltage monitor relay (q3) , call bell (q3) , molded case circuit breakers (mccb) as per is / iec 60947 (q3) , electrical connection lugs or thimbles (q3)