Feeder Contactor, voltage rating 750 V AC, Main pole- 04 NO Aux contact 2NO + 2NC, control voltage110 V AC with surge suppressor of Catalogue No. AF 50- 40- 00 + CA5- 22E + RV5/ 250 of M/ s. ABB. Make ABB/ SCHNIDER/ SIEMENS/ L & T only as per RCF specification no- EDTS 355, Rev- 1.