supply of on load tap changers for meil 20 mva , oltc for meil 20 mva120749 on load tap changer with motor drive mechanism & cylindrical type tie-in resistor. conforming as per the order specification sheet sg0100sc, tap changer specification sheet ed / aop15 / 120749 / 02 max current : atleast 351arated impulse withstand voltage ( in kv, 1.2 / 50 ) : 550rated power frequency withstand voltage ( in kv, 50hz, 1min ) : 230 no.of poles : 1preferably of typem111 351 123 / c 10.19.3w / equivalent , spare oltc for meil 20 mva120749 on load tap changer with motor drive mechanism & cylindrical type tie-in resistor. conforming as per the order specification sheet sg0100sc, tap changer specification sheet ed / aop15 / 120749 / 02 max current : atleast 351arated impulse withstand voltage ( in kv, 1.2 / 50 ) : 550rated power frequency withstand voltage ( in kv, 50hz, 1min ) : 230 no.of poles : 1preferably of typem111 351 123 / c 10.19.3w / equivalent.the spare oltc need to be supplied in a metalic steel container with n2 filled condition. , spares for meil 20 mva 120749spares shall include the following items nos 1-51. oil surge relay - 2 no. , 2. oltc motor - 1 no. , 3. transition resistance - 1 set , 4. oltc fixed contact - 1 set of contacts per phase. , 5. oltc moving contact - 1 set of contacts per phase. => limited