supply of supply of class b&c surge protection device (spd) type i & ii with visual indication and potential free contract to remote monitoring as per specification no:rdso/spn/165/2023 version 4.0 with amendment 1 and iec standard 61643 for signals line 230 v ac application with handling lightning surges of 10/350 microseconds and switching surges of 8/20 microseconds. one set consists of 3 nos of spd (two nos of b class (l n, n-e) and one no of c class (l-n) all enclosed in a box with kema or vde certified as per latest iec 61643-11-2011 standard class b&c surge protection device required with three modules only.supply of class b&c surge protection device (spd) type i & ii with visual indication and potential free contract to remote monitoring as per specification no:rdso/spn/165/2023 version 4.0 with amendment 1 and iec standard 61643 for signals line 230 v ac application with handling lightning surges of 10/350 microseconds and switching surges of 8/20 microseconds. one set consists of 3 nos of spd (two nos of b class (l n, n-e) and one no of c class (l-n) all enclosed in a box with kema or vde certified as per latest iec 61643-11-2011 standard class b&c surge protection device required with three modules only.,supply of class b&c surge protection device (spd) type i & ii with visual indication and poten tial free contract to remote monitoring as per specification no:rdso/spn/165/2023 version 4.0 with ame ndment 1 and iec standard 61643 for signals line 230 v ac application with handling lightning surges of 10 /350 microseconds and switching surges of 8/20 microseconds. one set consists of 3 nos of spd (two nos o f b class (l n, n-e) and one no of c class (l-n) all enclosed in a box with kema or vde certified as per latest iec 61643-11-2011 standard class b&c surge protection device required with three modules only. make/br and: dehn / obo / phoenix or equivalent note: the bidder should contact with consignee for application of the product and compatibility of t