Commissioning The Device - VOLTWERK SmartConnect 8 Instrucciones De Servicio

DANGER
Result
7.3
SmartConnect
Operating manual
Risk of fatal injury due to incorrect polarity at the DC main
connections
If several SmartConnects are switched in parallel:
If one SmartConnect is connected to the DC main connections with the
wrong polarity, this can cause severe damage to the device and to
persons.
Before connecting individual devices, always check that the polarity of
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the DC main connections is also correct.
1. Check the polarity. Note the following:
The strings must have the same polarity.
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Check the polarity of the DC main cables. If several SmartConnects
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are connected, switch these on.
If the polarities are not the same, do not operate the device. Check
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the connections.
2. Measure the off-load voltage. Note the following:
Measure the voltage directly at the input terminals of each string
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(S1– against S1+; S2– against S2+ etc.).
The voltage difference must be a maximum of approx. 25 V.
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If the difference in voltage is U > 25 V, check the solar modules.
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At low, diffuse levels of irradiation, off-load voltages may fluctuate.
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If the voltages are not the same, a solar module is probably
defective or contaminated, or
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a switching error has occurred.
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If no off-load current is measured,
the bypass diodes are defective or
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cables are broken.
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The device does not switch on at:
U < 300 V
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DC DC
U > 1000 V
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DC DC
The DC side has been checked.

Commissioning the device

During commissioning, the SmartConnect checks whether the voltage of
the solar power system is within the input voltage range 300 V < U
1000 V. This check is performed continuously during operation.
Prerequisites
The strings are connected to the SmartConnect.
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The AC side and the DC side have been checked.
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The DC main cable on the central inverter is connected.
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The mains cable is connected.
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The auxiliary power supply is not isolated.
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7 Commissioning
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DC
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