![]() ![]() RE: 3 phase motor won't start LittleInch (Petroleum) 1 Jun 23 10:19 I think the source transformer secondary Neutral/Ground is NOT properly grounded, NOT connected, High resistance to ground etc. Note: Line 2 to ground (225V) is far too high. The voltage should be 1.732 lower than the line to line. Are the voltage measured (across line to ground) are before or after the VFD? In any case the variation is not right. Are the voltage measured (cross lines) are before or after the VFD? In any case, the variation is bigger than expected.ģ. Is it a VFD?Ī) The motor is not turning when directly connected to the lines?, orī) The motor is not turning when connected to the output of the VFD?Ģ. I have it wired for the low voltage diagram shown on the motor".ġ. The voltage stamped on the motor is 230-460. When I measure each line to ground I get line 1 124, line 2 225 and line 3 124. ![]() Line 1 to line 3 245V and line 2 to line 3 251.#3. I measure the voltage on line 1 to line 2 260V. I have a 10 hp motor and when I turn it on it just growls and won't turn. ![]()
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