Protect PV.500-MH Operating Instructions
The insulation test can only be started manually if an insulation test is not already running at the time.
5.3.4Insulation Monitoring Parameters
All parameters are only relevant for operation with
Insulation test time:
The analogue and digital signals from the isometer are evaluated during this time.
Delay for insulation test following shutdown of K21 (earthing of PV cells):
Once the earthing has been disconnected, this time must elapse before insulation measurement can start.
Delay for shutdown of K21 in night operation:
Once sequence control has switched to the "Night" status, this time must elapse before earthing is removed with contactor K21.
Minimum time in maintenance mode:
If maintenance mode has been activated, the earthing is discon- nected and remains so for at least this time.
5.4MPP Tracker
In the "Operation" status (see Chapter 5.1.3), the inverter detects the maximum power point (MPP) of the PV cells.
The MPP tracker detects the point at which the solar cells give off maximum power.
This enables the system to achieve optimum efficiency.
Figure 9 MPP performance curve
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