schema de conectare a Wattmetrelor si Varmetrelor

In schema se arata modul de conectare al Wattmetrelor si varmetrelor trifazate ferodinamice care au cite doua serii de bobine si paralel.

Masurarea puterii absorbite de un receptor trifazat se poate face si prin metoda celor doua Wattmetre, utilizind doua aparate monofazate separate, conectate ca in fig. 3-68 si adunindu-se indicatiilor lor. In cazul cind la unul dintre wattmetre a fost necesar sa se schimbe legaturile fata de cele dn schema  (de exemplu la bobina de curent), pentru ca acul indicator sa devieze la dreapta, puterea trifazata este egala cu diferenta dintre indicatiile celor doua wattmetre.

4 comments to schema de conectare a Wattmetrelor si Varmetrelor

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