ABB Fimer PVS980-58-4348kVA-I, Commissioning And Maintenance Manual

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8 Safety instructions

Electrical safety precautions
These precautions are for all personnel who work on the inverter, its input and output
cables or conductors, the transformer or the photovoltaic (PV) modules.
WARNING! Obey these instructions to prevent injury or death, or damage to the
equipment. You must be a qualified electrician to do installation and service work.
Review these steps before you do installation or maintenance work on the
inverter.
1. Prepare for the work. Make sure you have a work order. Select the applicable personal
protective equipment.
2. Clearly identify the work location. Make sure that there is an escape route available in
case of an emergency.
3. Disconnect and isolate. (Not all disconnectors provide sufficient isolation against
voltage surges.)
•
Disconnect the inverter from the AC supply (normally a disconnector or a breaker
on the HV side of the main transformer), because the optional AC breaker of the
inverter does not remove the voltage from the AC output of the inverter (a).
•
Disconnect the inverter from the DC power supply (usually the DC switches of the
solar array junction boxes or the DC combiner box) (b).
•
Make sure that reconnection is not possible. Lock all of the disconnectors in the
open position and attach a warning notice to them (lockout-tagout).
•
After you disconnect the inverter, wait for at least 5 minutes to let the capacitors
discharge before you continue.
•
Open the optional AC main circuit breaker (Q4) through software parameter
214.02.
•
Open the auxiliary measurement unit switch (-F3.4).
•
Open the auxiliary power disconnectors (-Q64) and external supply (c) if the
inverter is supplied from external auxiliary power.
•
Remove the optional auxiliary power fuses (-F10.1-2 and -F20.1-2).
•
Remove the optional 3-phase output fuses (-F62.1-3).