tender for analog voltmeter 0-1000v, nw72 square panel mounting type, ac insulation class ci-1, accuracy:1.5, size 72mmx72mm with 750v marking, suitable for fixing in lhb ac coaches switch board cabinet as perrdso specn no: rdso/pe/spec/ac/0184-2015, rev.1. rdso approved makes:ae/rishabh/muller+zieghfer/ l&t/yokins. supply from oem/authorized dealers only accepted .