THREE-PHASE PASS-STEP PANEL WITH DR AND DPS

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Gênesis Engenharia

Published on Mar 23, 2022
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In this video we explain how to assemble a three-phase panel with TT grounding SINGLE-PHASE PANEL WITH TT GROUNDING ???????? • TT GROUNDING IN THE SINGLE-PHASE PANEL (... TWO-PHASE PANEL WITH TT GROUNDING ???????? • TT GROUNDING IN A TWO-PHASE PANEL WITH... ITEMS IN ACCORDANCE WITH THE STANDARD. 4.2.2.2.2 TT scheme The TT scheme has a power supply point directly grounded, with the installation masses connected to grounding electrode(s) electrically distinct from the power supply grounding electrode (figure 4). 6.3.5.2.6 Protection against electric shock and compatibility between DPS and RCD devices The following requirements a) and b) must be met: a) no DPS failure, even if eventual, must compromise the effectiveness of the protection against shocks provided to a circuit or installation; b) when the SPDs are installed, as indicated in 6.3.5.2.1, next to the entry point of the power line into the building or in the main distribution board, as close as possible to the entry point, and the installation is equipped with one or more RCD devices, the SPDs may be positioned upstream or downstream of the RCD device(s), respecting the following conditions: When the installation is TT and the SPDs are positioned upstream of the RCD device(s), the SPDs must be connected according to diagram 3 (see figure 13); When the SPDs are positioned downstream of the RCD device(s), these RCD devices, whether instantaneous or timed, must have immunity to surge currents of at least 3 kA (8/20 Ps).

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