device: 7UT87 transformer protection multi- winding transformer housing type: flush mounting; BI : 29; BO: 28 (10ST + 18F + 0HS + 0P); I: 27 (protection) + 1 ( sensitive); U: 4 (standard); measuring transducer inputs: 0 (20 m A or 10 V, fast), 0 (20 m A, normal); housing width: 1 x 19''; modules in 19" row 1: IO 203, PS201, IO202, IO203, IO20 3, IO206; modules in 19" row 2: ; LEDs/push-buttons: 16 LEDs; operation panel: integrated; key switch: without; display type: no display; front design: standard; auxiliary voltage: 60 V - 250 V DC, 100 V - 230 V AC;