Earthing system type TN-C-S

We learned you from previous publications that the system TN-C-S It is the most optimal one for replacement of the obsolete and gap RB for the power supply system TN-C. I will tell in this material, which is a TN-C-SAs well as what it has positive and negative sides.

What distinguishes the TN-C-S of TN-C

The algorithm works supply system TN-C-S It concluded that PEN wire reaching to a certain point, divided into PE and N wires and in this way comes to the end consumers, that is to say we are with you.

In this embodiment, the power wiring in the house (in the case of single-phase version) there are three wires, and if the three-phase wiring, then five.

At the same time our PE Explorer now we can connect with the ground contacts in the sockets and in many appliances, as well as to connect the RCD.

Where perform the splitting of PEN conductor

In most embodiments, this separation occurs on ASPs (input switching) of your household.

And there are bound to be established: the zero and the grounding rail. At the same time came

PEN wire connects to a bus PE (Which is also equipped with a re-ground), and has a grounding bus connect bus bridge zero as shown in the figure.

Note. shared conductor PEN must be a section of 16 square millimeters if aluminum and 10 square millimeters if copper.

Pluses system TN-C-S

power system TN-C-S It is the most respectable in Russia, because in order to make, for example, the system TN-S (Five conductors in three-phase systems) require significant investment in order to modernize the entire grid. And in TN-C-S you can split directly in the switchboard of the consumer.

Likewise, the system provides a sufficiently high level of electrical safety. After all, such a device will properly function in such a system as a RCD.

Disadvantages system TN-C-S

The only weak point of this system is that at breakage of a PEN conductor, as well as in violation of the integrity of the insulation of electrical appliances, their body gets energized.

conclusion

power system TN-C-S It is the perfect solution for private homes, because it is quite simple and economical. And with good grounding circuit and the use of additional protection devices such as RCD, Its drawbacks are offset.

Thanks for attention.