![]() The TRIAC under test can be considered good or useable only when LED glows in both above-mentioned tests. And, at the same time, the depression of switch SW 5 shortly initiates TRIAC conduction and LED glows.įaulty TRIAC shows similar behavior as SCR. On pressing switch SW 2, if LED remains in an off state and conduction is not initiated, the TRIAC is working properly. terminal MT1 is connected to negative and MT2 to positive. Now we reverse the direction of MT1 and MT2, i.e. Again, on pressing switch SW 5, LED doesn’t glow. If switch SW 2 is pressed briefly, LED goes off. after setting this arrangement, on pressing switch SW 1 for a short period, LED glows. Similarly, in the case of TRIAC testing using transistor tester circuit, the respective terminals must be connected properly-MT1 terminal to point A (positive), MT2 terminal to point K (negative), and its gate to point G. TRIAC Testing | Transistor, TRIAC and SCR Tester Circuit The only case where SCR is serviceable is when LED glows on pressing switch SW 1 for a moment and goes off on pressing switch SW 2. LED glowing by itself indicates the faulty i.e. If LED doesn’t glow till the end, SCR used is no good or it can’t function properly. Similarly, if switch SW 3 is in the “off” position (towards B), the current flowing through the SCR can be monitored by connecting a multi-meter or a milli-ammeter. This indicates that SCR under test can be used without being doubtful. Here main supply to the step-down transformer is interrupted for a moment with the help of switch SW 4. On doing so, the LED glows and glowing continues until switch SW 2 is pressed. Then, we slide switch SW 3 to the “on” position (towards A) and press switch SW 1 briefly. Initially, it is inserted in the socket with terminals inserted in proper slots. SCR Testing | Transistor, TRIAC, and SCR Tester Circuitįirst of all, let’s talk about testing an SCR using a transistor tester circuit. In spite of using this arrangement, we can also provide the power supply for this circuit using two pencil cells. This supply is derived from special arrangements of a zener diode in conjunction with a step-down transformer and rectifier, as illustrated in figure 1. The transistor tester circuit operates on a DC supply. Video pasand aane per Like karna mat bhuliye.Circuit Description of Transistor, TRIAC, and SCR Tester Circuit Umeed hai ki yeh video aapko pasand aayega toh video ko pura dekhiye aur janiye. Aaj iss video mein hamne Triac ke bare mein basic jankari di hai aur bataya hai ki Triac BT136 BT134 ko Digital Multimeter se kaise check kiya jata hai.bahut hi aasan tarike se. ![]()
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