Safety
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153379
This manual for use by qualified installers only
The GT100 can be energized from both the AC source and the DC source. To
ensure that the inverter is de-energized prior to servicing, lockout and tag the
GT100 using the following procedure.
1. Turn the GT100 main ON/OFF switch (S3) to the OFF position. This stops
the inverter from exporting power to the AC utility grid.
2. Open, lockout, and tag the incoming power at the utility main circuit breaker.
3. Open, lockout, and tag the AC Disconnect (CB1) on the left side of the
GT100. See Figure 1-8 on page 1–11 for the location of the AC Disconnect.
4. Open, lockout, and tag the DC Disconnect Switch (S1) on the right side of the
GT100. See Figure 1-8 on page 1–11 for the location of the DC Disconnect
Switch.
5. Using a confirmed, accurate meter, verify all power to the inverter is de-
energized. A confirmed, accurate meter must be verified on a known voltage
before use. Ensure that all incoming energy sources are de-energized by
checking the following locations at all line-to-line and all line-to-ground
configurations.
•
AC Utility Terminals: [TB1-A, TB1-B, TB1-C, TB1-N, and
TB2(GND BUS)]
See Figure 1-3 on page 1–5 for the location of these terminals.
•
PV Terminals: [TB3, TB4, and TB5 (PV GND)]
See Figure 1-5 on page 1–8 for the location of these terminals.
WARNING: Shock Hazard
Review the system schematic for the installation to verify that all available energy sources
are de-energized. DC bus voltage may also be present. Be sure to wait the full five minutes
to allow the capacitors to discharge completely
CAUTION
Once the DC Disconnect Switch (S1) is open, there will be DC voltage on the PV Array
side of the switch where TB3, TB4 and TB5(PV GND) are located. This voltage may be
as high as the Open-Circuit Voltage of the PV Array and is limited to 600VDC per NEC
690.
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