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An over current relay set to operate at secondary current 100 A is connected to the multi ratio C.T characteristics is given in fig, with 500/5 C.T ratio, the core area A=0.001935 m (the core is built in silicon steel and frequency 60 Hz). If the burden ZB is : (a) 0.32 30 (b) 12. 1- Determine whether or not the C.T will saturate.

An over current relay set to operate at secondary current 100 A is connected to the multi ratio C.T characteristics is given in fig, with 500/5 C.T ratio, the core area A=0.001935 m (the core is built in silicon steel and frequency 60 Hz). If the burden ZB is : (a) 0.32 30 (b) 12. 1- Determine whether or not the C.T will saturate.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1 30 An over current relay set to operate at secondary current 100 A is connected to the multi ratio C.T characteristics is given in fig, with 500/5 C.T ratio, the core area A=0.001935 m (the core is built in silicon steel and frequency 60 Hz). If the burden Zg is : (a) 0.3N (Φ) 1Ω. 1- Determine whether or not the C.T will saturate. 2- Determine the C.T error. 3- Will the relay detect a 11kA primary fault current? 500 (see notes) CT ratio resistance 2 Secondary 100 50.5 100:5 150:5 200:5 250:5 300:5 400:5 450:5 500:5 600:5 0.061 0.082 0.104 0.125 0.146 0.168 0.211 0.230 0.242 0.296 600 : 5- 500 : 5- 450 : 5- 400 : 5- - 50 : 5 100 : 5 300 : 5- 150 5 -200 5 250 : 5 01 0.001 0.01 0.1 1 10 100 Sec exc ting amps. I. Sec exciting volts, V. 1.
Transcribed Image Text:1 30 An over current relay set to operate at secondary current 100 A is connected to the multi ratio C.T characteristics is given in fig, with 500/5 C.T ratio, the core area A=0.001935 m (the core is built in silicon steel and frequency 60 Hz). If the burden Zg is : (a) 0.3N (Φ) 1Ω. 1- Determine whether or not the C.T will saturate. 2- Determine the C.T error. 3- Will the relay detect a 11kA primary fault current? 500 (see notes) CT ratio resistance 2 Secondary 100 50.5 100:5 150:5 200:5 250:5 300:5 400:5 450:5 500:5 600:5 0.061 0.082 0.104 0.125 0.146 0.168 0.211 0.230 0.242 0.296 600 : 5- 500 : 5- 450 : 5- 400 : 5- - 50 : 5 100 : 5 300 : 5- 150 5 -200 5 250 : 5 01 0.001 0.01 0.1 1 10 100 Sec exc ting amps. I. Sec exciting volts, V. 1.
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