Safety
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153379
This manual for use by qualified installers only
Wiring Requirements
1. All wiring methods and materials shall be in accordance with the National
Electrical Code ANSI/NFPA 70, as well as all state and local code
requirements.
•
Use copper conductors only with an insulation rating of 90 °C. The
optional Fused Combiner (GTFC), if installed, requires the use of copper
conductors only with a maximum insulation rating of 75°C.
2. The GT100 has a three-phase, four wire output.
3. The GT100 is interfaced with the AC utility grid at TB1 (TB1-A, TB1-B,
TB1-C and TB1-N), located in the lower left side of the enclosure. These
terminals require the use of a UL-approved crimp-on type ring terminal or a
UL-approved compression-type lug certified for use with the chosen interface
cables. Keep these cables together as much as possible and ensure that all
cables pass through the same knockout and conduit fittings, allowing any
inductive currents to cancel. For torque values, see Table A-5 on page A–5.
See Figure 1-3 on page 1–5 for the location of these terminals.
4. The AC neutral terminals (H0 and X0), shall be left floating (not connected)
on both the utility and inverter sides of the isolation transformer. See page 2–
4 for details.
5. The GT100 is interfaced with the DC photovoltaic array at either the Fused
Combiner (GTFC) or TB3, as well as TB4 and TB5 (PV GND), located in the
lower right side of the enclosure. Do not connect the grounded power
conductor from the PV array directly to TB5 (PV GND); doing so will bypass
the ground fault detector and violate the NEC. The TB3, TB4, and TB5
terminals require the use of a UL-approved crimp-on type ring lug or a UL-
approved compression-type lug certified for use with the chosen interface
cables. The Fused Combiner assembly includes box style connectors for cable
termination. Keep these cables together as much as possible and ensure that
all cables pass through the same knockout and conduit fittings, allowing any
inductive currents to cancel. For acceptable torque values for the box style
connectors and the TB3, TB4, and TB5 terminals, see Table A-6 and Table A-
7 on page A–5. See Figure 1-5 on page 1–8, Figure 1-6 on page 1–9, Table 1-
1 on page 1–8, and Table 1-2 on page 1–9 for the location and polarity of
these terminals.
6. This product is intended to be installed as part of a permanently grounded
electrical system as per the National Electrical Code ANSI/NFPA 70, as well
as all state and local code requirements. A copper clad earth grounding
electrode must be installed within 3 ft. (1 m) of the GT100 enclosure to ensure
compliance with FCC Part 15, Class A. The AC ground bus bar (TB2),
located in the lower left side of the GT100 enclosure, must be used as the
single point connection to the earth grounding electrode for the inverter
system.
Содержание GT100 Series
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