Fig. 1 shows a functional diagram of an over-current protection circuit. The Supply Source is a 620 Volts DC source with a current rating of 300 Amperes. The protection circuit must blow the fuse whenever the input current to the load exceeds 250 Amperes. Answer the following: Explain carefully how current control is achieved Describe/Explain the selection criteria for the SCR and the resistor R. With the aid of a practical functional circuit diagram, explain how the Control-circuit may be designed for the stated current and voltage values.
Fig. 1 shows a functional diagram of an over-current protection circuit. The Supply Source is a 620 Volts DC source with a current rating of 300 Amperes. The protection circuit must blow the fuse whenever the input current to the load exceeds 250 Amperes. Answer the following: Explain carefully how current control is achieved Describe/Explain the selection criteria for the SCR and the resistor R. With the aid of a practical functional circuit diagram, explain how the Control-circuit may be designed for the stated current and voltage values.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Fig. 1 shows a functional diagram of an over-current protection circuit. The Supply Source is a 620 Volts DC source with a current rating of 300 Amperes. The protection circuit must blow the fuse whenever the input current to the load exceeds 250 Amperes.
Answer the following:
-
Explain carefully how current control is achieved
-
Describe/Explain the selection criteria for the SCR and the resistor R.
-
With the aid of a practical functional circuit diagram, explain how the Control-circuit may be designed for the stated current and voltage values.
![fuse
R
(+)
SUPPLY
CONVERTER
SCR
SOURCE
CONTROL
AND LOAD
CIRCUIT
(-)
Fig. 1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F629ed93e-4080-444e-8701-1ffda401e024%2F7363805a-c7db-415a-b7d7-85bd55f32b91%2Frlwz4va_processed.png&w=3840&q=75)
Transcribed Image Text:fuse
R
(+)
SUPPLY
CONVERTER
SCR
SOURCE
CONTROL
AND LOAD
CIRCUIT
(-)
Fig. 1
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