The power-frequency converter, by the induction watthour meter, with application to bimodal tariff

The power-frequency converter denoted, “power frequency induction watthour meter converter” (PFIWHMC) is illustrated. The PFIWHMC is based on the induction watthour meter (IWHM) which is equipped, on its axis, with a mini-magnet, faced to a reed relay in C form. At each axis turn the magnet actuates the reed relay which then releases. The reed relay generates an output square wave voltage having frequency proportional to the power supplying the IWHM. The energy is registered, through a preset timer, by two counters (two seven digits electromechanical counters) of the bimodal tariff. The converter shows the counter digits of both the IWHM and the two of the bimodal tariff. A prototype of a PFIWHMC has been designed and constructed. Test results prove that the converter maintains the class of the original IWHM and responds to the exigencies of the bimodal tariff both for homes and industries in energy telemetering