AEG PV.630 Operation with Thin-Film Solar Cells, General, Sequence control, Maintenance mode

Protect PV.630 Operating Instructions

Sequence control behaviour differs depending on which solar cells are connected. The solar cells do not need to be earthed for op- eration with monocrystalline or polycrystalline solar cells. In this case, insulation measurement is always active.

For operation with thin-film solar cells, the solar cells must be earthed. In this case, insulation measurement is not active during earthing.

Insulation measurement sequence control features a “Maintenance mode”. This mode can only be activated for thin-film solar cells. Activating this mode disconnects earthing. This can be useful when mowing areas where solar panels are installed, for example.

5.3.2Operation With Monocrystalline or Polycrystalline Solar Cells

General:

This type of solar cell does not require active earthing.

Sequence control:

Insulation monitoring is always active.

Maintenance mode:

No action in the event of a “Maintenance mode” command.

Starting the insulation test manually:

No action, since the insulation test is always active.

5.3.3Operation with Thin-Film Solar Cells

General:

This type of solar cell requires active earthing.

Active earthing is switched on during the day and switches off at night. An insulation test is carried out at night.

When active earthing is switched on, the digital signals from the isometer are ignored.

Once active earthing is switched off, a certain time is allowed to elapse before the digital signals from the isometer are evaluated.

Sequence control:

When the equipment sequence control switches to the “Night” sta- tus (see Chapter 5.1.6), active earthing is switched off once a cer- tain time has elapsed.

The insulation test starts with a delay. Once a certain test time has elapsed, the insulation test finishes and active earthing is switched on again. If the sequence control switches to “Operation” status before the test time has elapsed, the timer control is ignored, the insulation test is terminated and active earthing is switched back on.

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