Triac - Detection DIP4 pin type ZC TRIAC optocouplers 2. Distinguish between G and T1 pole pole (1) identify the T2 pole after SCR, first assume that the rest of the feet in a foot of Tl pole, the other foot for the G pole. (2) the black pen then T1 pole patch SCR, the red pen then T2 pole, resistance is infinite. Followed by the red tip of the T2 and G shorted triac - works Kt16P single-phase thyristor voltage regulator / power adjustment triggered when the trigger plate at the gate G is turned on to join a forward bias voltage is positive because J3 SCR BT137S-600E, P2 zone when hole into N2 zone, electronic N2 region into the P2 region formed trigger current IGT. Within the SCR on the basis of positive feedback, coupled with the role of IGT, SCR SCR conduction advance BT134W-600E, leading to voltage characteristic OA segment left, IGT larger properties left more fast SCR, is fertile Electronics (certified), SCR provided by Dongguan City is fertile Electronic Technology Co., Dongguan City is Wo Electronic Technology Co., Ltd (www.dgmydz.com) (www.dgmydz.com) Dongguan, Guangdong, FET leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Wal-e-leadership in the positive with the staff warmly welcome all inquiries negotiations to create a positive fertile electronic better future.