Question
Download Solution PDFWhat is the charging current per phase of a three-core underground cable connected to 22 kV, 50 Hz three phase supply? Given that the capacitance of each phase to neutral is 18 µF. (Given the connection is star connected.)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The charging current per phase of a three-core underground cable is given by:
\(I_c={V_{ph}\over X_c}=V_{ph}ω C\)
where, Ic = Charging current
Vph = Phase Voltage
ω = 2πf = Frequency
C = Per phase capacitance
Calculation
Given, C = 18μF
\(V_{ph}={22\over \sqrt{3}}\times 10^3\)
\(I_{c}={22\over \sqrt{3}}\times 10^3\times 314\times 18\times 10^{-6}\)
Ic = 71.82 A
Last updated on May 29, 2025
-> SSC JE Electrical 2025 Notification will be released on June 30 for the post of Junior Engineer Electrical/ Electrical & Mechanical.
-> Applicants can fill out the SSC JE application form 2025 for Electrical Engineering from June 30 to July 21.
-> SSC JE EE 2025 paper 1 exam will be conducted from October 27 to 31.
-> Candidates with a degree/diploma in engineering are eligible for this post.
-> The selection process includes Paper I and Paper II online exams, followed by document verification.
-> Prepare for the exam using SSC JE EE Previous Year Papers.