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Power Electronics
CB used for over current protection of thyristor operates when the fault current is
of long period.
of short duration.
neither (A) nor (B).
both (A) and (B).
of long period.
of short duration.
neither (A) nor (B).
both (A) and (B).
Answer
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Related Question
Power Electronics
The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is
130 μs.
140 μs.
135 μs.
145 μs.
130 μs.
140 μs.
135 μs.
145 μs.
Answer
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Power Electronics
In a P1N1P2N2 thyristor which layer is less doped ?
P2.
N1.
N2.
P1.
P2.
N1.
N2.
P1.
Answer
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Power Electronics
Maximum power loss occurs during
delay time.
rise time.
all.
spread time.
delay time.
rise time.
all.
spread time.
Answer
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Power Electronics
Materials used in heat sink should have
high thermal conductivity.
All of these.
high melting point.
large surface area.
high thermal conductivity.
All of these.
high melting point.
large surface area.
Answer
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Power Electronics
Thyristor can be protected from over voltages by using
voltage clamping device.
heat sink.
snubber circuit.
fuse.
voltage clamping device.
heat sink.
snubber circuit.
fuse.
Answer
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