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10.2.1 Checking the AC/DC terminals in the inverters
The position of the terminals is shown in Section 3.7.
Procedure
1. Power down the Compact Station as described in Section 9.
2. Open the inverters.
3. Re-tighten the DC terminals in the inverters.
– Tightening moment for M8 nut: min. 20 Nm / max. 25 Nm
4. Re-tighten the AC terminals in the inverters.
– Tightening moment for M8 nut: min. 20 Nm / max. 25 Nm
5. Remove any foreign bodies (rodents, tools, etc.) from the inside of the inverter.
6. Close the inverter: install the contact protection first and then the front cover.
7. Switch on the Compact Station as described in Section 6.1.
10.2.2 Testing grid monitoring
The grid monitoring function of the inverters can be tested using the test contacts. This
test can be performed with single-tracking and multi-tracking compact stations.
The test contacts permit a separation of the measuring lines between the respective
power unit and the three phase voltages V°L1, V°L2 and V°L3. This makes it possible to
connect an AC generator for grid simulation. A DC voltmeter can be connected to the test
contacts in order to check the control voltage of the AC contactors K1, K2, or K3. The
system's power units must be tested separately.
Conditions / aids:
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Sufficient solar irradiation during the test
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3-phase AC generator
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DC voltmeter
DANGER!
Fatal electric shock hazard!
Components within the inverter are subject to high voltage. The test must be
performed on the open inverter.
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Never touch any uninsulated electrical lines or contacts.
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Wear insulating gloves and safety goggles.
Procedure
1. Power down the Compact Station as described in Section 9.
2. Open the inverters.
3. Release the slide switches of the test contacts V L1, V L2, V L3, and K1EN at the "LT1"
