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2.2.3 PV Arrays Hazards
DC high voltage! Electric shock hazards!
When exposed to sunlight, PV array will produce voltage, which is very high in
large-scale power station
Death from burning and electric shock due to touching the PV array.
During installation, maintenance, and troubleshooting of the device, ensure that:
• The inverter is disconnected from the PV array.
• Necessary warning signs are in place to prevent inadvertent reconnection.
2.2.4 Ground Fault Protection
If a ground fault occurs in the PV system, some parts that are supposedly voltage-
free may carry lethal voltage. Accidental touch may cause serious damage. Make
sure there is no system ground fault before performing operation and take proper
protective measures.
2.2.5 Live Line Measurement
High voltages are present inside the device. Death can result from burning and
electric shock due to touching the live components of the inverter. During live line
measurement,
• use suitable protective equipment, for example, dielectric gloves, and
• accompanied by other persons.
2.2.6 Measuring Instrument
The instrument for measuring the electrical parameters should meet the following
requirements:
• The instrument for measuring the electrical parameters should be a high-
quality instrument with sufficient measuring range.
• Make sure the connection and use of the instrument are correct to avoid arc
and other dangerous situations.
• Use suitable protective equipment, for example, dielectric gloves during live
line measurement.
2 Safety Instructions System Manual
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