KACO Powador XP500-XP550-HV TL - Manual (Page 28)

Page 28 Operating Instructions Powador XP500/550-HV-TL
Storage/Installation/Start-up
ON OFF
Fault History Statistics Setup
701.0V 380.0V
75.8kW 79.0kW
45.0°C
Date/Time
Figure 15: MMI screen
5.6 Operation
DANGER
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorised electricians who are approved by the supply grid operator may open,
install and maintain the inverter.
› Keep all doors and covers closed when the unit is in operation.
› Do not touch the lines and terminals when switching the unit on and off!
5.6.1 Operating states
The Inverter has seven operating states. The explanations about each state are below.
Disconnected (default) Before operation has commenced the inverter is in the disconnected state. In
this state, the inverter is totally isolated from the PV array and the utility grid.
Connecting to the PV array When the inverter is in the “Disconnected” state, the ‘Inverter On’ button on
the GUI is selected and the PV voltage is kept above 400V for 5 seconds, the
system turns on the PV Array side contactor (PV_MC).
Connecting to Grid When the inverter is in the “Connecting to PV Array” state and the PV volt-
age is kept above the value of “MPPT V Start” parameter during the time set
by “MPPT T start” parameter, the contactor on the grid side is turned on. The
inverter keeps this state for 8 seconds.
Initializing MPP The inverter calculates the MPPT start voltage which is product of measure-
ment of PV voltage and the parameter “MPP Factor”. After 5 seconds, the
inverter system enters into the “MPP start” state.
Table 3: Operating states