I’m seeking advice from everyone regarding the star-delta connection method
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I know the relationships between the line voltage in star connection, the phase voltages, and the currents. However, I still have a question: regarding the starting current, the current in delta connection is three times that in star connection. But when I look at the specifications of many motors, for example, for a 11 kW motor, the rated current in delta connection is 22.3 A, while it’s 12.9 A in star connection – this should follow a ratio of square root of 3, so why isn’t it three times? I’ve checked many sources but haven’t found an answer. Logically speaking, it should indeed be three times, but then why do the specifications show a ratio of square root of 3? I hope experts can give some advice. Thank you
The rated current is different from the starting current
But it’s clear that when a triangular motor is connected in star configuration, the current is one-third
Got it; when it’s switched to star connection, the voltage is 660V. . . I’ve been depressed for several days
“The relationship between “line voltage” and “phase voltage” is √3; for example, 380/220 can be understood more easily in this way