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Safety
xii
153378
Lockout and Tag (De-energize/Isolation Procedure)
Safety requirements mandate that this equipment not be serviced while energized.
Power sources for the GT100 must be locked-out and tagged prior to servicing. A
padlock and tag should be installed on each energy source prior to servicing.
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 door of the
GT100. See Figure 1-8 on page 11 for the location of the AC Disconnect.
4. Open, lockout, and tag the incoming power at the PV array disconnect (if
installed.) If a PV array disconnect is not installed, see the WARNING below.
5. Open, lockout, and tag the DC Disconnect Switch (S1) on the right door of the
GT100. See Figure 1-8 on page 11 for the location of the DC
Disconnect Switch.
6. 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 i on page xiii for the location of these terminals.
•
PV Terminals: [TB3, TB4, and TB5 (PV GND)]
See Figure ii on page xiii 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. Once all sources of input are
identified and isolated, allow five minutes for all capacitors within the main enclosure to
completely discharge before proceeding.
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.
Summary of Contents for GT100-208
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Page 3: ...Xantrex GT100 Grid Tied Photovoltaic Inverter Operation and Maintenance Manual ...
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