USER MANUAL of HPC-250HT
PE07019-022-B
Page 21 of 69
3.3.1.9
Disconnecting from Grid
This step of the shut down sequence disconnects the HPC-250HT from the utility grid by
turning OFF the AC Contactor (-K1).
The system can get into this state
-
From “Shut Down” state, after an automatic shutdown process was initiated, meaning
that the input DC power of the HPC250-HT is lower than the threshold value set in
the “Stop Power” [kW] textbox for the time interval set in the “Stop Time” [seconds]
textbox on the “Settings” tab page.
-
From “Shut Down” state, after the Start / Stop Key Operated Spring-return Switch
(-S1) is operated and held in the “Stop” position for more than three seconds in the
following system states
o
“Connecting to Grid, test of String Voltage”
o
“Feeding to the Grid”
The system can leave this state
-
In case of a regular low-power shut down the system state changes to “Waiting after
Low Power Stop”
-
In case of a shut down initiated by means of the Start / Stop Key Operated Spring-
return Switch (-S1), the system state changes to “Offline”