Surge arrester 3 pole 40kA type 2 IT system with defect indicator. 3-pole, modular surge arrester for 400/690V, IT systems, arrester type 2 according to EN 61643-11, high-performance varistor technology, base part with plugged-in protection modules, simple, tool-free protection module change thanks to module locking system with module release button, highest continuous voltage: 440 V AC, protection level: <= 2 kV, nominal discharge current: 20 kA, energy coordination according to DIN EN 62305-4 (VDE 0185-305-4) with type 1, series-mounted device according to DIN 43880, 3TE.