Good day! Attached three diagrams to the comment.
a) Star. Advantages: simple connection, relative symmetry of currents in the windings. Disadvantages: the electric motor is capable of using only a third of the rated power (hence, it is respectively possible to develop only a third of the torque). The working capacitor can be calculated using the formula: Cp = 2780 * (Iph / Uph). The starting capacitor is calculated according to the formula Cn = 2.5-3 * Avg.
b) Triangle. Pluses of the circuit: the windings operate at rated voltage, the motor is able to develop power close to the rated one. Disadvantages: lack of symmetry of currents in the windings, a sufficiently large capacitor is needed, the starting torque does not exceed 0.4 of the nominal. Formula for calculating a working capacitor: Cp = 4800 * (Iph / Uph). In this case, Cn = 2.5-3 * Avg.
c) Incomplete star. Pros: the power can reach a value close to the nominal, the starting torque is higher than the nominal, you can achieve symmetry of the currents in the windings. Disadvantages: not all capacitors are suitable for connecting the motor, the complexity of connecting the circuit, Cp = 2780 * (Iph / Uph) In this case, Cn = 2.5-3 * Cf.
Before choosing one of the schemes, I recommend that you read about it in more detail on the network, there are many nuances that cannot be described with one comment.
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