The Siemens SENTRON 5SV8701-0KK is a type A summation current transformer designed for AC systems, with a 30 mm internal diameter that accepts bundled conductors up to that cross-section. Rated at 63 A operational current and 720 V AC at 50/60 Hz, it feeds residual current signals to a connected RCD or monitoring relay — the 30 mA minimum residual current sensitivity means it can detect earth faults down to that threshold, which is the standard for personnel protection in most IEC-based installations. Screw-type terminals accept 0.13 mm² to 2.1 mm² conductors, and the IP20 rating at the connection terminals means it is suited for enclosed panel mounting — not for wet or dusty environments without a cabinet.
The 70 mm depth, 59 mm width, and 32 mm height fit a standard DIN-rail envelope — check the available rail space against these dimensions before panel layout. The 10 m maximum wire length to the connected evaluation unit governs where the transformer can be placed relative to the RCD or relay. Ambient temperature range spans -20 °C to 70 °C, with a maximum 95% humidity influence — suitable for most indoor industrial panels but not for direct outdoor exposure without climate control.