Eltek Valere Theia He-t Przewodnik Instalacji Pobierz pdf (Strona 16)

16 Installation Guide THEIA HE-t String Inverters 357115.033, Issue 2.0, 2011 March

2. Stringbox with DC Fuse Holders and no DC Switch

The stringbox can be equipped with DC fuse holders and plug-in connectors or cable glands

and a blanking plug instead of the DC switch. A DC switch must be installed separately by

authorized personnel in compliance with the relevant national electrical regulations.

Figure 2.3.8: Optional DC connectors and no DC

switch

P1, P2, P3: Positive connectors

N1, N2, N3: Negative connectors

BP: Blanking Plug

Figure 2.3.9: Stringbox with DC fuse holders and

blanking plug

*N4: Grounding terminal and terminal for

the grounding strap

*P4: Ungrounded terminal

Negative grounded PV String

• Connect the grounding strap between *N4 and the DC ground terminal in the internal

connection area (See 2.3.2. Grounding).

Positive grounded PV String

• Connect the positive conductors from the positive connectors to the terminal block labeled

Grounded, and the negative conductors to the terminal block labeled Ungrounded.

• Switch the conductors connected to *N4 and *P4.

• Connect the grounding strap between *N4 and the DC ground terminal in the internal

connection area (See 2.3.2. Grounding).

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Eltek Valere Theia He-t Przewodnik Instalacji Strona 16