Siemens SENTRON 5SV8701-2KK is a Type B summation current transformer designed for AC and DC systems. It sits in the residual current monitoring path, summing the currents of multiple conductors to detect leakage down to 10 mA. The 80 A operational rating covers the load side; the 35 mm internal diameter accepts bundled conductors up to that size. Plug-in terminals (IP20) keep wiring clean on the DIN rail.
What the ratings mean for fit
Type B summation CT with residual threshold from 10 mA, rated 80 A, 35 mm ID, and operating temperature -10 to 55 °C.