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Introduction
1–8
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DC Interface
The DC Interface serves as the connection interface between the PV array and the
GT100 (see Figure 1-2 on page 1–4 to locate the DC Interface). This section
houses the DC Disconnect Switch and DC contactor. Additionally, the PV Ground
Fault Detection circuitry, DC surge arrestor, Solid State Relays, and 48Vdc Power
Supply are also housed in this section.
DC Terminals
The terminals provide six holes with space for twelve cables with a M10 bore
diameter per pole (see Table A-6 on page A–5 for torque requirements).
The table below describes the DC terminal polarity for each GT100 model.
WARNING: Shock Hazard
Xantrex recommends the installation of PV array disconnect(s) to ensure personal safety
during GT100 maintenance.
WITHOUT PV ARRAY DISCONNECT(S), ONCE THE
DC DISCONNECT SWITCH (S1) IS OPEN,
THERE WILLSTILL BE DC
VOLTAGE on the DC terminals TB3, TB4 AND TB5 (PV GND)
. This voltage may be
as high as the open-circuit voltage of the PV Array and is limited to 600Vdc per NEC 690.
Use extreme care to avoid these terminals if no PV array disconnect is installed.
Figure 1-5
DC Terminals
TB5
(PV GND)
TB3
TB4
Table 1-1
DC Terminal Polarity
Model
TB3
TB4
TB5
GT100-208-NG
PV+
PV–
PV GND
GT100-208-PG
PV–
PV+
PV GND
GT100-480-NG
PV+
PV–
PV GND
GT100-480-PG
PV–
PV+
PV GND
Summary of Contents for GT100-208
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