device: 7UT87 transformer protection multi- winding transformer housing type: flush mounting; BI : 87; BO: 39 (19ST + 20F + 0HS + 0P); I: 24 (protection); U: 8 ( standard); measuring transducer inputs: 0 (20 m A or 10 V, fast), 0 (20 m A, normal); housing width: 1 x 19'' + 1/3 x 19''; modules in 19" row 1: IO 203, PS201, IO202, IO202, IO20 3, IO230; modules in 19" row 2: PS 203, IO205; LEDs/push-buttons: 32 LEDs; operation panel: integrated; key switch: with; display type: large display; front design: standard;