Connecting the DC Wiring

Connecting the DC Wiring

WARNING: Shock hazard

Use caution when working around sources of DC power. Although the DC/AC disconnect switch disconnects the inverter from DC power, hazardous voltages from paralleled PV strings will still be present upstream of the switch and inside the wiring box. To reduce the risk of shock during installation, cover the array with an opaque (dark) material before making any connections, ensure the DC/AC Disconnect Switch is set to OFF (see Figure 3-6), and always test for voltage before touching exposed wiring or devices.

Figure 3-6DC/AC Disconnect Switch Positions

The following procedure is illustrated in Figure 3-7. If there is more than one PV string, label the positive and negative wire pairs appropriately (for example: PV1-String #1 POS, PV1-String #1 NEG, PV1-String #1 GND,

PV1-String #2 POS, etc.).

To wire the PV array to the GT Inverter:

1.Connect the POSITIVE (+) wire from the PV1 string #1 to one of the PV+ terminals.

2.Connect the NEGATIVE (–) wire from the PV1 string #1 to one of the PV– terminals.

3.Repeat for the PV1 string #2, if there is one.

4.Repeat for the PV1 string #3, if there is one.

5.Ensure all connections are correctly wired and properly torqued to a maximum 16 in-lb (1.8 Nm).

975-0320-01-01

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