divided into single-pole (1P), single-phase (2P), three-phase three-wire (3P), three-phase four-wire (4P) according to the pole number; it can be divided
ແບ່ງອອກເປັນດຽວ pole (1P), ດຽວໄລຍະ (2P), ສາມໄລຍະສາມສາຍ (3P), ສາມໄລຍະສີ່ສາຍ (4P) ອີງຕາມການຈໍານວນ pole ໄດ້; ມັນສາມາດແບ່ງອອກ