Installation diagram TN C on TN CS, surge arrester, residual current device

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#31 10939369 27 May 2012 17:44

ferguson123456 ferguson123456

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Post #31
10939369 27 May 2012 17:44

Thank you for noticing the lack, I added an isolating switch.

mrst wrote:
You have socket and lighting circuits on one circuit, so when there is leakage in any of the sockets, you will not have lighting either

The lighting is shared with the circuit of the sockets because especially the induction and the electric oven cause a heavy load, it would be difficult to power it all from only 2 phases.

Are there any other suggestions?
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#32 10939469 27 May 2012 18:19

mar_cik mar_cik

Electrician specialist

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Post #32
10939469 27 May 2012 18:19

Yes.
Instead of three-pole B20 for hob and oven, three single-pole B16.
Instead of B6 for B10 lighting circuits.
Two additional B16 circuit breakers, one each connected to the RCD in phase L1 and L2 as a reserve.
Additional switch B6 connected without RCD, as a backup for the anti-theft control unit, etc.
If possible, replace the three-pole pre-meter B25 with C25.
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#33 10939545 27 May 2012 18:40

ferguson123456 ferguson123456

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Post #33
10939545 27 May 2012 18:40

mar_cik wrote:
Instead of three-pole B20 for hob and oven, three single-pole B16.

The division into 3 MCBs seems logical but B16 is probably not enough. The induction is 7.2 kW (we finally decided) P = I * U * cos phi = 16 * 230 * 0.95 = 3.496 kW and the induction hob is 3 , 6 kW from one phase. I know, I did not provide information about the power of the induction hob.

mar_cik wrote:
Instead of B6 for B10 lighting circuits.

I was just wondering from what I was reviewing, the B 10 protection is often used for lighting circuits. But isn't that too much? One chandelier is approx. 100 - 150 W, with the use of fluorescent lamps 25 - 50 W. So with B6 and the use of incandescent lamps, one could power approx. 8-10 chandeliers. So it seems sufficient.

mar_cik wrote:
If possible, replace the three-pole pre-meter B25 with C25.

Unfortunately, the Power Plant imposed such a security.
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#34 10939929 27 May 2012 20:24

mar_cik mar_cik

Electrician specialist

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Post #34
10939929 27 May 2012 20:24

The B16 for hob and oven is the correct protection.
Most of the light sources (including halogen transformers) take an inrush current when turned on, sometimes quite large and it may turn out that the switch B6 will work unnecessarily.
#35 10939946 27 May 2012 20:29

elpapiotr elpapiotr

Electrician specialist

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Post #35
10939946 27 May 2012 20:29

Hello.

Therefore, other, smaller, time-delayed protections are used for halogen transformers.
You should answer the question what current can / should flow on the secondary side for this protection to work.
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#36 10940316 27 May 2012 21:54

ferguson123456 ferguson123456

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Post #36
10940316 27 May 2012 21:54

Thanks for your comments. In the will of explanation at home, I will only use fluorescent lamps and ordinary light bulbs in rooms where you stay for a short time.
I will wait until tomorrow to close the topic, maybe someone will have some suggestions.
#37 10943326 28 May 2012 21:00

ferguson123456 ferguson123456

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Post #37
10943326 28 May 2012 21:00

I consider the topic to be resolved. Thank you for all your help and best regards.
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Topic summary

The discussion revolves around the installation diagram for a TN-C network with a focus on integrating a residual current device (RCD) and surge arrester in a residential setting. The user seeks advice on modifying their electrical system, which includes a farm building with existing TN-C wiring. Key points include the need to eliminate the bridge between the neutral (N) and protective earth (PE) busbars, proper connection of the surge arrester, and the importance of grounding and equipotential bonding. Various responses highlight the necessity of adhering to electrical standards, the potential risks of improper connections, and suggestions for circuit protection, including the use of appropriate circuit breakers for different appliances. The user is encouraged to consult licensed professionals for the installation and to ensure compliance with local regulations.
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