Medical Isolation Power Supply System

01

Low-voltage power distribution grounding and neutral connection systems are divided into three basic forms: IT, TT, and TN. TN is divided into three derivative types: TN-C, TN-S, and TN-C-S.

The first letter indicates the status of the neutral point and ground of the power supply:

      T - indicates that the neutral wire of the power supply is directly grounded; 

      I - indicates that the neutral wire of the power supply is not grounded or grounded with high impedance.

The second letter indicates the state of the load side and ground;

      T - The leaking conductive part of the electrical device is directly grounded, and the grounding point is independent of the grounding point of the power supply terminal; 

      N - The exposed conductive part of the electrical device is directly electrically connected to the grounding point of the power supply terminal.

The third letter C indicates that the neutral line (N line) is shared with the protective zero line (PE line); the fourth letter S indicates that the neutral line (N line) is separated from the PE line.

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Structure

Application