SMA SC 400HE - Manual (Page 56)

4 Sunny Central Control SMA Solar Technology AG
56 SC4-63HE-BE-BEN103280 Operating Manual
Similar to the behavior during grid overvoltage, the Sunny Central responds when the voltage falls
below the "VCtllLim" parameter (undervoltage threshold 1) and the "VCtlIlLim" parameter
(undervoltage threshold 2).
1. Enter password (see section 4.2.2 "Entering the Password", page 32).
2. Select Device Set-up > Parameters > Grid decoupling > Voltage.
3. Using the [ ↓ ] button, select the parameter to be changed.
4. Enter the parameter and confirm with [ENTER] until the line stops flashing.
5. Enter the calculated value for offset and confirm with [ENTER] until the line stops flashing.
6. After exiting the menu, confirm the security prompt twice with [ENTER].
☑ Grid monitoring is configured.
4.9.3 Grid Monitoring for Power Frequency
You can manually specify the limiting values and tripping time. For frequency monitoring, three
separate limits can be set for both overvoltage and undervoltage. For the frequency, 3 limits can be
set respectively.
For example, you can set activation to occur after 1 second if there is an overfrequency of 50.5 Hz
or even after 0.1 seconds if the overfrequency reaches 51.5 Hz.
C Startup/MPP load operation
D Grid monitoring
E Failure
1 VCtlhhLim Grid limit level 2
2 VCtlhLim Grid limit level 1
3 Connection limit
4 Grid limit level 1 is breached, timer starts
5 Grid limit level 2 is breached, timer starts
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 monitoring time starts
9 Grid within valid range during monitoring time grid connection
Object Parameter Description