ABB Fimer PVS980-58-1818kVA-I, Руководство по пусконаладке и техническому обслуживанию

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Safety instructions 9
4. Make sure that there is no voltage present.
•
Use a voltage detector with nominal voltage of 1500 V DC and minimum withstand
voltage of 3000 V DC (in rare fault cases the voltage on the DC terminal can be
two times the system voltage). The detector must be rated for outdoor use, and
must have a self-testing feature to ensure that it works correctly. Notice the
weather conditions of the site when you do the measurements: do not measure in
wet conditions. Do not use a multimeter.
•
Make sure that the voltage between the inverter AC output terminals (L1, L2, L3)
and the grounding (PE) busbar is close to 0 V. Measure every phase-to-phase and
phase-to-ground voltage (L1-L2, L1-L3, L2-L3, L1-GND, L2-GND and L3-GND).
•
Make sure that the voltage between the inverter power module UDC+ and UDC-
terminals and the grounding (PE) busbar is close to 0 V.
•
Make sure that the voltage between the DC input terminals DC+ and DC- and the
grounding (PE) busbar is close to 0 V.
5. Install temporary grounding. Connect the AC and DC busbars (in both DC sections) to
the PE with a temporary grounding tool. Temporary grounding must withstand the
available short circuit current of the AC or DC supply. One temporary grounding device
may not be enough on the AC side. 25 mm ball grounding terminals are provided in
some cases.
The temporary grounding cables must be dimensioned to withstand the prospective
current of the system until the upstream protection device clears the fault current. The
temporary grounding cables should be tied tightly to the busbars or the frame unit as
the forces of the short circuit current can cause the temporary grounding cables to
move hazardously.
6. Protect any other energized parts in the work location against contact. Take special
precautions when you work near bare conductors.
7. Ask the person in charge of work for a permit to work.
After you finish the work, make sure that the inverter is clean from inside and that all the
tools have been removed from inside the inverter, remove the temporary grounding and
inform the person responsible that work is complete. After you make sure that the voltage
can be connected, close all the doors of the inverter, and close the disconnectors. When
connecting voltage back on, do not stand right next to the inverter. Also make sure that
there is an escape route available in case of an emergency.