device: 7SA87 distance protection, 1-/ 3-pole housing type: flush mounting; BI : 91; BO: 44 (30ST + 14F + 0HS + 0P); I: 8 (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''; modules in 19" row 1: IO 208, PS201, IO202, IO205, IO20 7, IO230; modules in 19" row 2: ; LEDs/push-buttons: 32 LEDs; operation panel: integrated; key switch: without; display type: large display; front design: standard; auxiliary voltage: 60 V - 250 V DC, 100 V - 230 V AC;