Installation manual

Verify Voltages
975-0601-01-01 Revision B 4–7
This chapter is for use by qualified personnel and authorized service personnel only.
6. If results are within the correct range, continue with the commissioning
procedure steps.
7. Confirm all measurement equipment, meters, and probes are removed safely
from the inverter and immediate work area.
8. De-energize the Xantrex GT500 by following the “Lock-out and Tag-out
Procedure” on page xi.
9. Slide the AC barrier from the left side of the transformer assembly back into
place, and then secure it with the four screws as shown on the left side of
Figure 3-17 on page 3–23.
10. Close and latch all transformer and inverter assembly doors.
Verify DC Voltages and Re-install DC Barrier
Verify DC voltages before re-installing the DC barrier. After verifying DC voltages,
complete “Step 5. Verify DC PV Voltage at TB3 and TB4” on page C–3 on the
form in Appendix C.
To verify DC voltages and re-install the DC barrier:
1. Make sure
transformer assembly and inverter assembly doors are closed and
latched. Confirm that the DC switch S1 status is
OPEN.
2. Apply DC PV voltage by switching the external PV disconnecting means
to
ON.
3. Wearing appropriate PPE, open the right door of the inverter assembly doors
to access the DC compartment.
4. With an appropriate voltmeter, use the positive (+, red) voltmeter probe on
TB3 and the negative (-, black) voltmeter probe on TB4. Measuring the
correct polarity is important.
• On a negative grounded system the voltage should read between
+300 VDC and +600 VDC.
• On a positive grounded system the voltage should read between
-300 VDC and -600 VDC.
DANGER
HAZARD OF ELECTRIC SHOCK
Hazardous voltages will now be present on the PV input terminals in the
Xantrex GT500 as well as on circuits and parts throughout the Xantrex GT500.
Do not proceed without appropriate PPE.
Failure to follow these instructions will result in death or serious injury.