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E
lectrical and thermal safety
WARNING! Obey these instructions to prevent injury or death, or damage to the
equipment. If you are not a qualified electrician, do not perform any electrical installation
or maintenance work.
Obey all installation safety standards. This can require, among other things, the use of
personal protection equipment (PPE), such as arc-proof clothing, arc-proof masks, protective
footwear, insulating and protective gloves, eye protection and hearing protection. High power
inverter installations have high fault currents.
Before you operate on the inverter, isolate the AC line cables from the electrical power system
with the AC disconnect switch of the power system transformer (downstream the inverter). Also,
isolate the inverter from the photovoltaic generator with the DC disconnect switch of the generator
or by other means (upstream the inverter). The internal AC disconnect switch (if present) do not
isolate the AC output cables and terminals of the inverter from the electrical power system. The
internal DC disconnect switches (if present) do not complete isolate the DC input cables or
terminals from the DC voltage supplied by the photovoltaic generator. Refer to "Inverter total
de-energization and safe access" chapter on this manual for further details.
Do not work on the communication and control signal cables when power is applied to the
inverter or to the external control circuits.
Do not perform insulation or voltage withstand tests on the inverter.
ABB inverters must be earthed via the connection points marked with the protective earth
symbol
and using a cable with an appropriate conductor cross-section for the maximum
ground fault current that the generating system might experience.
Do not switch-on the inverter with the front covers open, even during troubleshooting. The
inverter front covers act as arc hazard protection. If a highly unlikely arc flash incident occurs
when the inverter front covers are open, the arc-flash proof protection equipment might not
provide sufficient protection for the operators.
When the device has just been switched off, it may have hot parts as a result of overheating
of the heated surfaces (e.g.: transformers, accumulators, coils, etc.) so be careful where you
touch.
1 - Safety and accident prevention
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