procurement of remote terminal unit procurement of remote terminal unit ( rtu ) , supply of complete rtu comprisingof gprs modem , plccmodem with requisitequantity of analog input cards , digital input , digital output cards , multifunction meter , cmr &hdr , required transducers with hardware for monitoring transformer para meters ( i . e . oltc , winding temperature , oil temperature , low oil level , prv trip , bucholz alarm , bucholz trip , osr trip , healthiness of fire prevention system ) , monitoring cb on/off , low sf6 gas pressure , master trip operation status , station transformer monitoring , battery voltage , load current and battery charging current etc . complete wiring and cabling as per clause 4 . 9 & 5 . 2 and other associated accessories required for monitoring and control of all the equipments as described in volume-ii of technical specification , rtu of configuration suitable for 220 kv substation as per annexure-i , rtu of configuration suitable for 132 kv substation as per annexure-i