Why the engine does not start under load from a single-phase network?

George asks:
The electric motor has 2 capacitors 1 per 100 microfarad 250 volts, 2 to 25 microfarad 450 volts. A 750-watt motor does not start under load until it is twisted by hand. Is it possible to replace 1 capacitor per 100 microfarads with 450 volts - is there a difference?
The answer to the question:
Hello! And how are they connected? Are all switched on for permanent operation or through the PNVS button and starting capacitors are disconnected after starting and workers are connected? Most likely yes, you need to replace the capacitor or all capacitors, in general you need to determine in which capacity the capacitor has disappeared. And the voltage here is on the contrary better than 450 volts than 250 (it will be more reliable).
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