What kind of machine do you need for a heating cable (pipe heating)?

Hello, good morning to you. Please tell me what kind of automatic machine you need to put into the circuit when connecting the cable for heating the pipe (so that in the cold it does not freeze and the pipe with water does not burst). Cable 50 meters 220 Volt 780 W, plugs into a wall outlet. The instructions say that you must connect a 30mA circuit breaker (translated from English). As I understand it, what is said about the machine. Thanks in advance.

Sincerely, Alexander.