Hi chaps! I want to learn why do we need to ground one of the three phases in TN-S systems,İf I am not wrong it has to do with the lack of a neutral point and so it aims to create a neutral point true? İt says in the book of wolfgang Hofheinz "electrical safety in medical places" that it (phase conductor) is grounded if there is no neutral point or you cant find it , so how can it be that you ground a phase if it has one and you ground one phase since you cant find? I think it is illogical to ground a phase conductor in a TN-S system from a second point except the neutral point if there is one. What makes me confused is the word "find" here?
I cant find a neutral so I do ground a phase . İs this logical since overcurrent device is suppsed to operate in this case automatically.
I cant find a neutral so I do ground a phase . İs this logical since overcurrent device is suppsed to operate in this case automatically.