Good morning, Is on the attached diagram - SPD B is necessary since SPD A is within 9m of the cable - between A and B switchboards, LgY 16mm? is sufficient, as there is a parallel PEN Cu 16mm? connection greetings, Marcin

Hello In each analyzed case, I try to capture the individual zones of the PAP. From this I infer the position of the individual SPDs (at the zone boundaries). It is difficult to deduce anything from the drawing. Perhaps the SPD B could be replaced from type (T1 + T2) to T2. Are switchgear A and switchgear B in the same building? How is it with SPD A grounding - is this a designer's joke? What is the role of SPD A? kisses - GIFT-

A, B and C switchboards are inside the same building. And it is on the ground floor, on the outer wall, next to the entrance to the earth cable building from TL, ZK-1, then there is an overhead line. B is on the ground floor on the outer wall (the one on the opposite side of the building from A) right at the entrance to the building of the ground cable from PV, cable length as shown in the picture. C i switchboard in the attic.

SPD B Necessity and Cable Specifications in Photovoltaic Diagram

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#1 18771004 20 Jun 2020 15:20

marcin.gawenda marcin.gawenda

Level 11

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Post #1
18771004 20 Jun 2020 15:20

Good morning,

Is on the attached diagram
- SPD B is necessary since SPD A is within 9m of the cable
- between A and B switchboards, LgY 16mm? is sufficient, as there is a parallel PEN Cu 16mm? connection

greetings,
Marcin
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#2 18771792 20 Jun 2020 21:14

Darom Darom

Electrician specialist

» | Helpful post? (+2)

Post #2
18771792 20 Jun 2020 21:14

Hello
In each analyzed case, I try to capture the individual zones of the PAP. From this I infer the position of the individual SPDs (at the zone boundaries). It is difficult to deduce anything from the drawing. Perhaps the SPD B could be replaced from type (T1 + T2) to T2. Are switchgear A and switchgear B in the same building? How is it with SPD A grounding - is this a designer's joke? What is the role of SPD A?

kisses
- GIFT-
#3 18772116 20 Jun 2020 23:14

marcin.gawenda marcin.gawenda

Level 11

» | Topic author Helpful post? (+1)

Post #3
18772116 20 Jun 2020 23:14

A, B and C switchboards are inside the same building.
And it is on the ground floor, on the outer wall, next to the entrance to the earth cable building from TL, ZK-1, then there is an overhead line.
B is on the ground floor on the outer wall (the one on the opposite side of the building from A) right at the entrance to the building of the ground cable from PV, cable length as shown in the picture.
C i switchboard in the attic.
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