Wan n-gun shadawn ai lam hta madung jak langai hku nna, single-phase wan n-gun shadawn ai jak ni hpe galaw shapraw ai lam gaw shinggyim wuhpawng a wan n-gun jai lang ai lam a rawt jat galu kaba wa ai lam hte grai matut mahkai nga ai. Tsaban 19 htum wa maga de wan n-gun hpe -madang kaba jai lang hpang wa ai kaw nna, wan n-gun meter ni pru wa nna gram lajang wa ai gaw, n-gun hpe hpaji masa hku jai lang ai lam hpe n-gun jaw ya ai sha n-ga, dai ni na aten na hpaga lam hte nta masha ni a sak hkrung lam hta wan n-gun jai lang ai lam hpe mung grai sung ai hku shadut ya nga ai.
1880 ning daram hta Edison a direct current wan n-gun shapraw ai ladat hpe n-gun jaw ai hte rau, shawng nnan na wan n-gun shadawn ai jak ni pru wa sai. 1889 ning hta German engineer Hermann Aron gaw, hka kata na metal ions ni a htawt sit ai lam hpe shadawn nna, n-gun lang ai lam hpe n hkrak ai hku shadawn ai electrolytic npawt tara hpe madung tawn nna, wan n-gun shadawn jak hpe hpan shapraw wa ai. Raitim, ndai jak gaw hkrak ai lam n law ai hte gram lajang ai lam grai yak ai majaw, masha law law chye na hkra yak ai. 1890 ning daram hta, galai shai ai wan n-gun masa ni rawt jat wa ai majaw, grau nna tatut jai lang mai ai induction wan n-gun meter hpe shapraw wa sai. 1896 ning hta American hpaji ninghkring Elihu Thomson gaw, shawng ningnan lang, hpaga yumga galaw na matu, wan n-gun meter langai hpe galaw shapraw wa sai. Ndai hpaji masa gaw, galai shai ai magnetic field hte shachyut ai aluminum disk hpe shinggrup ai npawt tara hpe jai lang nna, wan n-gun hpe hkrak hkrak jak hte shadawn lu ai. Shi a hkrang masa gaw asan sha rai nna, kam hpa mai ai lam grai law ai majaw, ndai hpaji masa gaw tsaban 20 a shawng na daw hta mungkan ting hta madung hparan ladat tai wa sai.
Tsaban 20 lapran- kaw nna-hpang daw de, electronic hpaji masa hta rawt jat wa ai majaw, wan n-gun meter ni hta ningnan hpaji ni hpe shabyin wa ai. 1970 ning daram hta, integrated circuits ni hpe jai lang ai majaw, electronic wan n-gun meter ni gaw, moi na jak meter ni hpe loi loi hte galai shai ya lu wa ai majaw, shadawn shadang grau hkrak ai hte, n-gun n-gun n-nga ai lam ni hpe n-gun jaw ya lu ai. Tsaban 20 htum wa de, Microprocessor hpaji masa hpe jai lang wa ai majaw, wan n-gun meter ni hpe data ni hpe shinggyin la lu ai hte tsan tsan kaw nna matut mahkai lu ai atsam ni grau nna jat wa ai majaw, smart grids ni hpe gyin shalat na matu npawt nhpang hpe gaw gap ya sai. Tsaban 21 kaw nna, single-phase wan n-gun meter ni gaw, digitalization hte networking de loi loi hte sit sa wa nna, bidirectional meter hte tengman ai-ten hpe yu reng ai lam hpe madi shadaw ya ai, garan gachyan ai n-gun lu la ai lam hte jai lang ai wa -maga de hparan hpareng ai lam ni hpe hkap la ya ai.
Mechanical gear kaw nna hpaji rawng ai chips ni du hkra, single-phase wan n-gun meter ni a labau gaw shinggyim masha ni n-gun n-gun hpe jai lang na matu n-gun n yawm ai sha shakut nga ai hpe madun dan nga ai. Daini, wan n-gun jahpu hpe hka wa na matu ladat langai sha n-ga, n-gun atsam Internet hta n mai malap ai node langai mung rai nna, mungkan n-gun atsam galai shai wa na matu hpaji masa hku matut manoi madi shadaw ya nga ai.
