9Safety and accident prevention
EN
1.3.3 Electrical and thermal safety
WARNING – B 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.
WARNING – B Obey all installation safety standards. This requires, 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.
WARNING – B 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
of inverter). Also, isolate the inverter from the photovoltaic generator with the DC disconnect
switch of the generator or by other means (upstream of 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 completely
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” paragraph on this manual
for further details.
WARNING – B Do not work on the communication and control signal cables when power is
applied to the inverter or to the external control circuits.
WARNING – B Do not perform insulation or voltage withstand tests on the inverter with exception
for those indicated in this document.
WARNING – B 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.
WARNING – B Do not switch-on the inverter with the front covers open, even during
troubleshooting. The inverter front covers act as arc flash hazard protection. If a 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.
HOT SURFACE – C When the device has just been switched off, it may have hot parts as a result
of overheating of the heated internal components (e.g.: transformers, accumulators, coils,
etc.). Please pay attention to this.
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