supply of coupling socket assembly with locking arrangement with cable [e-beam], suitable for use in inter vehicular coupler, 750 volt, 3 ph, 500 , 50 hz, suitable for lhb-type ac coaches, and conforming to rdso specification no. rdso/pe/spec/ac/0177-2013 (rev.1). , coupling socket assembly with locking arrangement with cable [e-beam], suita ble for use in inter vehicular coupler, 750 volt, 3 ph, 500 amp, 50 hz, suitable for lhb-type a c coaches, and conforming to rdso specification no. rdso/pe/spec/ac/0177-2013 (rev.1). [ w arranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]