La description

The NC7 series AC contactor (hereinafter referred to as
“contractor”) is mainly used in the circuit with an alternating
current of *0Hz (or *0Hz), rated operational voltage up to
**0V, and rated operational current up to **0A under the
usage category of AC*3/**0V; this contact is mainly used for
remotely closing and breaking circuits, and can be combined
with an appropriate thermal overload relay to form a
electromagnetic starter so as to protect the circuits likely
to be overloaded in operation; the contact is well suited for
frequently starting and controlling AC motors.