Voltcraft-Top-hat-rail-AC-meter-VSM-102-Voltcraft-VSM-102-Z-hler-P-The-Voltcraft-VSM-102-is-a-compact-electronic-active-energy-meter-for-use-in-three-phase-grids-with-a-neutral-conductor-The-application-range-is-in-the-low-voltage-level-for-recording-energy-purchases-The-meter-also-has-an-S0-interface-&-a-serial-RS485-interface-that-may-be-used-for-reading-the-meter-reading-&-various-performance-data-The-meter-is-compatible-with-the-Smart-Metering-System-VSM-201-Gateway-P-Voltcraft