supply of ac static watt-hour meter ( electronic energy meter ) with lcd display etc., ac static watt-hour meter ( electronic energy meter ) with lcd display, isi marked, single phase, i ( b ) : 10 amps, i ( max ) as % of i ( b ) : 400, v ( ref ) :240, ct: nil, suitable for measurement of ac active electrical energy in the frequency range of 50hz + / - 5% in single phase or three phase system with balanced or unbalanced loads and conforming to class one of is: 13779-2020. [ warranty period: 30 months after the date of delivery ] coaching depot stores / src , west bengal 35.00 numbers ser divisional gsd adra , ser west bengal 100.00 numbers