
User Manual THEIA HE-t String Inverters 357115.013
,
Issue 1.0, 2011 April
27
Figure 4.3.7: Stringbox with DC fuse holders and
DC switch
*N4:
Grounding terminal and terminal for the
grounding strap
*P4:
Ungrounded terminal
TB: Terminal Block
TBS: Terminal Block Screw
DS: DC Switch
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 customer
connection area (See 4.3.3. Grounding).
Negative grounded PV String
• Connect the grounding strap between *N4 and the DC ground terminal in the customer
connection area (See 4.3.3. Grounding).
Wiring Diagram
Positive grounded PV String
Negative grounded PV String
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