SMA SC 500HE-20 User Manual
Page 58
7 Grid Monitoring
SMA Solar Technology AG
58
SCxxxHE-20-BE-BEN111210
Operating Manual
Similar to the behavior during grid overvoltage, the Sunny Central responds when voltage falls below
the "VCtllLim" parameter (undervoltage threshold 1) and the "VCtlIlLim" parameter (undervoltage
threshold 2).
1. Access the SC-COM interface.
2. Enter your password in the appropriate field on the homepage and press [Login].
3. Change the parameter for grid monitoring (see section 5.2 "Changing Parameters", page 34).
4. Confirm parameter by pressing [Save].
E
Fault
1
VCtlhhLim
Grid voltage limit level 2
2
VCtlhLim
Grid voltage limit level 1
3
Connection limit, maximum nominal voltage deviation
4
grid limit level 1 is exceeded, timer for B starts counting
5
Grid limit level 2 is exceeded, timer for A starts counting
6
Grid limit level 2 for delay time level 2 is breached → grid disconnection
7
Grid limit level 1 for delay time level 1 is breached → grid disconnection
(already occurred on level 2)
8
Connection conditions fulfilled → grid monitoring time starts counting
9
Grid within valid range during grid monitoring time → grid connection
Contact the SMA Service Line before changing any parameters
Contact your grid operator and SMA Solar Technology AG before changing any grid
monitoring parameters. The parameters are protected by a password.
Object Parameters
Description