Technical Specifications / Parameters Parameter Specification Manufacturer Type Code SA/S 8.16.1 Brand / Series ABB SA Series (Electromechanical Energy Meters) Device Type Single-Phase Induction Watt-Hour Meter (kWh Meter) Measurement Type Active Energy (kWh) Connection Type Direct Connection (No current transformers required). Rated Voltage (Un) Typically 230V AC, 50/60 Hz (Standard for single-phase systems). Current Ratings Basic Current (Ib): 8 A Maximum Current (Imax): 16 A This means the meter is designed to measure accurately from very low loads up to 16A continuously. Accuracy Class The suffix .1 strongly indicates it is a Class 1 meter (meeting IEC 62053-11 standards), meaning its maximum permissible error is ±1% under specified conditions. Starting Current Very low, typically ≤ 0.5% of Ib (e.g., ≤ 40 mA), allowing it to measure tiny loads accurately. Display Mechanical counter (cyclometer) with 5 or 6 digits, displaying cumulative kWh consumption. Operation Principle Induction motor principle. The voltage and load currents create magnetic fields that induce eddy currents in a rotating aluminum disc. The disc's rotation speed is proportional to the instantaneous power, and its total revolutions are proportional to the energy consumed. Mounting Designed for DIN Rail Mounting (35mm) or sometimes panel mounting via a snap-on bracket. Terminals Screw terminals for direct connection of line and load wires. Dimensions Compact, typical width of 72 mm (4 DIN modules). Operating Temperature Typically -25°C to +55°C. Standards & Approvals IEC 62053-11 (Class 1 AC active energy meters), MID (Measuring Instruments Directive) certified for billing purposes in applicable regions