Carlo Gavazzi WM15 power network analyser for panel mounting (96 × 96 mm) in auxiliary switchboards of traction substations. It measures voltage, current, power, power factor, frequency, active and reactive energy, and harmonic distortion (voltage and current THD up to the 15th harmonic) in single-, two- and three-phase systems, including ARON and wild-leg configurations, using TRMS values. Current measurement via current transformers (In 5 A, ratio up to 2000). Active energy accuracy class 1 / B (EN 62053-21, EN 50470-3, MID), optionally 0.5S. Self-powered or auxiliary supply 120–240 V AC/DC. Optional communication: Modbus RTU RS485 or M-Bus, OptoProg optical port, pulse/alarm output. Backlit 128×64 LCD display, IP51 front. Applications: monitoring energy consumption and network parameters in traction substation switchboards, operating-hour counter for maintenance planning, and energy billing (MID).
