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2.2.3 Storage Battery Protection
High voltages exist between the positive and negative polarities of the storage batteries for
large-scale BESS(Battery Energy Storage System). Electrical shock or life risk may occur by
accidental touch.
High voltages exist between the positive and negative polarities of the storage
batteries!
• Ensure the PCS and storage batteries are completely disconnected during
device maintenance.
• Place warning labels in the disconnection place to avoid accidental
reconnection.
If the battery needs to be reconnected after the switch or circuit breaker on battery
output side is disconnected, ensure that:
• The PCS is shutdown, and the PCS has been stopped for at least 5 minutes.
• The AC circuit breaker and the DC load switch are disconnected.
• Voltages inside the device fall within the safe range.
2.2.4 Live Line Measurement
High voltages are present inside the device. Death resulting from burns and
electric shock upon touching the live components of the PCS. During live line
measurement,
• Use suitable protective equipment, for example dielectric gloves, and
accompany by other persons.
2.2.5 Measuring Instrument
Instrument for measurement of the electrical parameters should meet the requirements
listed below:
• Instrument for measurement of the electrical parameters should be high quality
instrument with sufficient measuring range.
• Make sure the connection and use of the instrument are correct to avoid arc
and other dangers.
• Use suitable protective equipment, for example dielectric gloves if live line
measurement is required.
2 Safety Instructions System Manual
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