AExE01 · Chapter 1Basic Electrical & Electronics🏛️ Past Licensure QuestionID: aec7e91e
In a balanced three-phase delta-connected load, the relationship between line current (IL) and phase current (IP) is:
In a balanced three-phase delta-connected load, the relationship between line current (IL) and phase current (IP) is:
Multiple Choice Options
- A
IL = IP
- B✓ Correct Option
IL = √3 IP
- C
IP = √3 IL
- D
IL = 3 IP
Detailed Technical Solution & Explanation
In a balanced three-phase delta () connection, the line voltage equals the phase voltage (), while the line current is the phasor difference of two adjacent phase currents spaced 120° apart, yielding .
Option Analysis:
•
Option A (IL = IP): Incorrect. Holds for star connections, not delta.
•
Option B (IL = √3 IP): Correct. In delta connection, line current is times phase current.
•
Option C (Incorrect. Phase current is smaller): .
•
Option D (IL = 3 IP): Incorrect.
Reference: Demo · Set 4NEC Licensure Syllabus