The Siemens SENTRON 5SV8200-6KK is a digital 4-channel residual current monitor, Type A, designed to detect and report ground-fault currents in AC circuits. It monitors residual currents from 0.03 A up to 30 A with adjustable time delays from 0.02 s to 10 s, making it suitable for selective coordination in distribution panels or equipment-level ground-fault protection.
Type A detection means it catches both sinusoidal AC residual currents and pulsating DC residual currents — the standard for modern electronic loads like VFDs, switching power supplies, and LED drivers. The adjustable trip threshold (0.03–30 A) and time delay (0.02–10 s) let you set selectivity downstream of a main RCD, so a fault on one branch doesn't take the whole panel down. Rated supply voltage is 230 V AC nominal, with a working range of 184 V to 276 V, covering standard single-phase line-to-neutral supplies. Power loss is 6 VA maximum, negligible for panel thermal budgeting. The front panel carries IP41 protection (tools won't enter, some dripping water), while the terminals are IP20 — finger-safe once wired.
Housed in a 54 mm wide, 85 mm tall, 68 mm deep enclosure that clips onto standard DIN rail. Screw-type terminals accept AWG 26 to AWG 14 conductors with a 10 mm strip length. The summation current transformer connects via a separate cable run up to 10 m — compatible with the 5SV8700 series CTs. Five normally-open auxiliary contacts are available for remote status indication or cascading alarms. Error memory is built in, so the last fault condition is retained even after power loss — useful for diagnosing intermittent ground faults.