Which of the following is a safety device connected in series to the circuit?
Fuse
By melting, the fuse interrupts the flow of excessive current, preventing damage to equipment and reducing the risk of fire. Based on the analysis, the device among the options that is a safety device and is connected in series to the circuit is the fuse.
Important Questions from Thyristor Protection
Match List-I with List-II and select the correct answer using the given lists:
List – I
(SCR rating)
List – II
(Protective element)
A. di/dt limit
1. Snubber
B. dV/dt limit
2. Heat sink
C. i2t limit
3. Series reactor
D. Junction temperature limit
4. Avoid runway speed on no load
For series connected SCRs, static equalization is obtained with the help of
In thyristor \(\dfrac{di}{dt}\) failure is prevented by
Match the following :
List – I List – II a. Snubber circuit i. SCR b. Inverter ii. High efficiency c. Phase control iii. \(\dfrac{dv}{dt}\) protection d. SMPS iv. UJT Codes :
Assertion (A) : A number of thyristors operating in parallel cannot share a common heatsink.
Reason (R) : For simultaneous firing of the thyristor opto-isolator may be employed in the gate driving circuit.
