Stop; Grid Monitoring; Monitoring The Grid Voltage - SMA MEDIUM VOLTAGE POWER STATION 500SC-JP System Manual

13 Function Description

13.1.2 Stop

The inverter is switched off. Stop, Fast stop or Remote shutdown active will appear on the touch display. If the key
switch is set to Start, the inverter switches to the operating state "Grid monitoring".

13.1.3 Grid Monitoring

13.1.3.1 Monitoring the Grid Voltage

In the operating state "Grid monitoring", Waiting for valid AC grid appears on the touch display. The grid limits are
monitored continuously from now on. If no grid error occurs during the grid monitoring time, the AC contactor closes
and the inverter switches to the operating state "Grid monitoring time reached". If the grid limits are exceeded during
the monitoring time, the inverter will restart "Grid monitoring".
You can specify the thresholds and the delay time manually. For voltage monitoring, you can set two limits for
overvoltage and two limits for undervoltage. If the grid voltage increases above the value defined in the parameter
VCtlhhLim or VCtlhLim, the inverter waits for the time defined in the parameter VCtlhhLimTm or VCtlhLimTm and
disconnects from the utility grid.
Figure 59: Temporal inverter behavior when the grid limits are exceeded
Position Parameter
A VCtlhhLimTm
B VCtlhLimTm
C ‒
D ‒
E ‒
1 VCtlhhLim
2 VCtlhLim
3 ‒
180 MVPS22JP-SH-en-11
Description
Delay time for grid limit level 2
Delay time for grid limit level 1
Startup/MPP load operation
Grid monitoring
Disturbance
Grid voltage limit level 2
Grid voltage limit level 1
Connection limit, maximum nominal voltage deviation
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