SMA SC 200 - Manual (Page 61)

SMA Solar Technology AG External Grid Monitoring Relay (optional)
User Manual SC-BEN100262 61
12 External Grid Monitoring Relay (optional)
All Sunny Central inverters with an integrated transformer use an external grid monitoring relay to
monitor the connected grid. This relay detects and signals breaches of the grid limits and transmits a
fault signal to the Sunny Central. Devices without an integrated transformer can optionally be fitted
with this relay.
If a grid monitoring relay is fitted, the grid limits in the Sunny Central software are expanded and thus
deactivated. In this case, grid monitoring takes place via the external grid monitoring relay.
The parameters for the grid limits are then set directly at the grid monitoring relay.
The following illustration shows the position of the grid monitoring relay, based on the example of a
Sunny Central 250HE.