Christian As elektomaq tells you, it cannot be started in delta, due to the large amount of current it would consume. That is why it comes with the star / delta start, which reduces the starting current and is then connected in delta. The installation of a soft starter, allows to start it in delta, but with electronics and software the starting current is controlled. This type of boot is guaranteed to protect the mechanical parts. In addition to not having moving parts, you would not have to every time, maintain contactors or change them. If the investment in a soft starter is not up to you, and you have no experience, you will not be able to argue the type of boot proposed.