What this SENTRON unit does
The Siemens SENTRON 5SV6016-7MC13 is a 2-pole miniature circuit breaker (MCB) with a C-curve tripping characteristic, rated for 230 V AC and a full-scale current of 33 A. It integrates an ammeter, voltmeter, wattmeter, frequency meter, and reactive power meter — so it measures voltage, current, active power, apparent power, frequency, and reactive power in one DIN-rail package. Accuracy on current and voltage is 0.5 %; active and apparent power accuracy is 1 %, per IEC 61557-12, IEC 62053-22, and IEC 62053-23. That means you get revenue-grade metering without a separate meter module.