Nedap PowerRouter PR50S, Инструкция по установке и эксплуатации

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Connect the wires that carry the DC voltage from the PV array to the
PowerRouter in the order described in the previous procedure.
Deviating from this procedure could expose you to lethal voltages that can
cause serious injury and/or death.
PV arrays are energized when exposed to light. Use safe working
practices when working on PV arrays.
Switch OFF all AC and DC breakers and switches in the PV system and
wait a minimum of 5 minutes for the PowerRouter to completely discharge
before connecting or disconnecting any wires to the PowerRouter. Failure
to do so could expose you to high voltages that can cause serious injury
and/or death.
Verify that the DC solar current of your installation does not exceed the
maximum rates specified in the type rating label.
Check both the polarity and the open-circuit voltage from the PV strings!
Figure 15 Solar irradiated panel generates high voltage
Use special tool for disconnecting the MC4 connectors as described in
appendix H to prevent damage of the connectors.
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danger