SMA SC 500CP-10-JP User Manual

User Manual

SUNNY CENTRAL 500CP-JP / 630CP-JP / 800CP-JP

SCCP-JP-BA-A4-en-12 | 98-103200.02 | Version 1.2 ENGLISH

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SMA Solar Technology AG

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© 2004 to 2014 SMA Solar Technology AG. All rights reserved

2 SCCP-JP-BA-A4-en-12 User Manual

SMA Solar Technology AG Table of Contents

Table of Contents

1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.4 Personal Protective Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 PV System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.1 Design of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.2.2 Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.2.3 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

3.2.4 Touch Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.2.5 Key Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.3 Sunny Central Communication Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.4 Sunny Central String-Monitor Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.5 Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.6 External Fast Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.7 Ground-Fault Monitoring and Insulation Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.7.1 Mode of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

3.7.2 Ground-Fault Monitoring in Grounded PV Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3.7.2.1 Ground Fault Detection and Interruption (GFDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3.7.2.2 Remote GFDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3.7.2.3 Soft Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.7.3 Insulation Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.7.3.1 Insulation Monitoring Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.7.4 Combined Insulation and Ground-Fault Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.7.4.1 GFDI and Insulation Monitoring Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.7.4.2 Remote GFDI and Insulation Monitoring Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.7.4.3 Remote Soft Grounding and Insulation Monitoring Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3.8 Grid Management Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.8.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.8.2 Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.8.3 Reactive Power Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.8.4 Behavior in the Absence of Active and Reactive Power Setpoints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.8.5 Full and Limited Dynamic Grid Support (FRT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.8.6 Decoupling Protection Ramp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

3.8.7 Grid Management Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

3.8.8 Q at Night . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

3.9 Islanding Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.9.1 Active Islanding Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

3.9.2 Passive Islanding Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

3.10 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

User Manual SCCP-JP-BA-A4-en-12 3

Table of Contents SMA Solar Technology AG

4 Touch Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

4.1 Touch Display Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.2 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.2.1 Status Info Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

4.2.2 Information Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

4.2.3 Navigation Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

4.3 Selecting the Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.4 Changing the Date, Time and Time Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.5 Selecting the Display Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.6 Setting the Brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.7 Entering the Installer Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5 Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

6 Communication with the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

6.1 Displaying Instantaneous Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.2 Changing Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.3 Setting the String-Current Monitoring on the Sunny Central String-Monitor Controller . . . . . . . . . . . . . . . . 40

6.4 Optional Settings of the Sunny Central String-Monitor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.4.1 Changing the Communication Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

6.4.2 Changing the Monitoring Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

6.4.3 Assigning PV Strings to Different Measuring Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

6.4.4 Assigning PV Strings to Different Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

6.4.5 Setting the Tripping Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

6.4.6 Setting the Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

6.5 Configuring the Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.6 Deactivating the "Fully Hermetic" Transformer Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

7 Grid Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

7.1 How Grid Monitoring Works. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7.2 Setting Line Voltage Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7.3 Setting Power Frequency Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.4 Grid Connection after Elimination of Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.5 Setting the Active Power Ramp-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.6 Setting the Medium Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.7 Activating the Manual Resume Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8 Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

8.1 Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.1.1 Frequency-Dependent Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

8.1.1.1 Principle of Frequency-Dependent Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.1.1.2 Setting the Mode of Frequency-Dependent Active Power Limitation and Associated Parameters. . . . . . . . . . . . 50

8.1.2 Frequency-Independent Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

8.1.2.1 Selecting the Mode with the Parameter P-WMod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

8.1.2.2 No Active Power Limitation: Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.1.2.3 Active Power Limitation with Setpoint Command via Modbus Protocol: WCtlCom Mode . . . . . . . . . . . . . . . . . 51

8.1.2.4 Active Power Limitation with Absolute Value: WCnst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.1.2.5 Active Power Limitation as a Percentage of Nominal Power: VArCnstNom Mode. . . . . . . . . . . . . . . . . . . . . . . 51

8.1.2.6 Active Power Limitation via Standard Signal: WCnstNomAnIn Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

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SMA Solar Technology AG Table of Contents

8.1.3 Displaying the Status of Active Power Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

8.1.4 Displaying Error Messages and Warnings for Active Power Limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

8.2 Reactive Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.2.1 Mode of Reactive Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

8.2.1.1 Selecting the Mode with the Parameter Q-VArMod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

8.2.1.2 No Reactive Power Control: Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

8.2.1.3 Reactive Power Control with Setpoint Command via Modbus Protocol: VArCtlCom Mode . . . . . . . . . . . . . . . .55

8.2.1.4 Reactive Power Control with Setpoint Command via Modbus Protocol: PFCtlCom Mode. . . . . . . . . . . . . . . . . . 55

8.2.1.5 Reactive Power Control with Absolute Value: VArCnst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

8.2.1.6 Reactive Power Control as a Percentage of the Nominal Power: VArCnstNom Mode . . . . . . . . . . . . . . . . . . . .55

8.2.1.7 Reactive Power Setpoint via Standard Signal: VArCnstNomAnIn Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

8.2.1.8 Reactive Power Setpoint via Displacement Power Factor cos φ: PFCnst Mode . . . . . . . . . . . . . . . . . . . . . . . . . .56

8.2.1.9 Displacement Power Factor cos φ via Standard Signal: PFCnstAnIn Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

8.2.1.10 Displacement Power Factor cos φ as a Function of Feed-In Power: PFCtlW Mode . . . . . . . . . . . . . . . . . . . . . . .57

8.2.1.11 Reactive Power as a Function of Line Voltage: VArCtlVol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

8.2.1.12 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic Curve:

VArCtlVolHystDb Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

8.2.1.13 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic Curve:

VArCtlVolHystDbA Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

8.2.2 Displaying Error Messages and Warnings for the Reactive Power Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . .63

8.3 Q at Night . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.3.1 Selecting Parameter QoDQ-VarMod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

8.3.2 No Q at Night: Off Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

8.3.3 Q at Night with Setpoint Command via Modbus Protocol: VArCtlCom Mode. . . . . . . . . . . . . . . . . . . . . . . . .65

8.3.4 Q at Night with Absolute Value: VArCnst Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

8.3.5 Q at Night as a Percentage of the Nominal Power: VArCnstNom Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

8.3.6 Q at Night via Standard Signal: VArCnstNomAnIn Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

8.3.7 Q at Night as a Function of Line Voltage: VArCtlVol Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

8.3.8 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic Curve:

VArCtlVolHystDb Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

8.3.9 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic Curve:

VArCtlVolHystDbA Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

9 Setting the Insulation Monitoring of the PV System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1 Setting the PV System to Insulation Monitoring with GFDI and an Insulation Monitoring Device . . . . . . . . 72

9.1.1 Safety during Insulation Monitoring of the PV System with GFDI and an Insulation Monitoring Device . . . . . . 72

9.1.2 Switching to Insulated Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

9.1.3 Switching to Grounded Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

9.2 Setting the PV System to Insulation Monitoring with Remote GFDI and an Insulation Monitoring Device . . 73

9.2.1 Information on Insulation Monitoring of the PV System with Remote GFDI and an Insulation

Monitoring Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

9.2.2 Switching to Insulated Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

9.2.3 Switching to Grounded Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

9.3 Setting the PV System to Insulation Monitoring with Remote Soft Grounding and an Insulation

Monitoring Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.3.1 Information on Insulating PV Modules with Remote Soft Grounding and an Insulation Monitoring Device . . .74

9.3.2 Switching to Insulated Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

9.3.3 Switching to Grounded Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

User Manual SCCP-JP-BA-A4-en-12 5

Table of Contents SMA Solar Technology AG

10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

10.1 Safety During Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10.2 Reading Off Disturbance Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10.2.1 Reading Off Disturbance Messages via Touch Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

10.2.2 Reading Off Disturbance Messages via User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

10.3 Acknowledging Disturbance Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10.3.1 Acknowledging Disturbance Messages via the Key Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

10.3.2 Acknowledging Error Messages via the User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

10.4 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.4.1 Behavior of Sunny Central Inverters under Fault Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

10.4.2 Explanation of the Error Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

10.4.3 Error Numbers 01xx to 13xx - Disturbance on the Utility Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

10.4.4 Error Number 34xx to 40xx - Disturbance on PV Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

10.4.5 Error Numbers 60xx to 90xx - Disturbance on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

11 Instantaneous Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

11.1 Sunny Central. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

11.1.1 Power Limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

11.1.2 Error Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

11.1.3 Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

11.1.4 Internal Device Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

11.1.5 Internal Meters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

11.1.6 Service-Relevant Display Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

11.2 Sunny Central String-Monitor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

11.2.1 Instantaneous Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

11.2.2 Internal Device Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

11.2.3 Status Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

11.3 Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

11.3.1 Instantaneous Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

11.3.2 Internal Device Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

11.3.3 Status Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

12 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

12.1 Sunny Central. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

12.1.1 Power Limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

12.1.2 Grid Monitoring/Grid Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

12.1.3 Grid Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

12.1.4 Insulation Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

12.1.5 Internal Device Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

12.2 Sunny Central String-Monitor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

12.3 Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

13 Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

6 SCCP-JP-BA-A4-en-12 User Manual

SMA Solar Technology AG 1 Information on this Document

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1 Information on this Document

Validity

This document is valid for the following device types as of OCU firmware version 01.60.00.R and
DSP firmware version 01.60.00.R:

• SC 500CP-10-JP (Sunny Central 500CP-JP)

• SC 630CP-10-JP (Sunny Central 630CP-JP)

• SC 800CP-10-JP (Sunny Central 800CP-JP)
The production version is indicated on the type label.
The firmware version can be read out via the user interface.
This document describes the operation of the Sunny Central and troubleshooting.
Diagrams in this document are reduced to the essential and may deviate from the real product.

Target Group

This document is intended for qualified persons. Only persons with the appropriate skills are allowed to perform the tasks
described in this document (see Section2.3 "Skills of Qualified Persons", page12).

Additional Information

Links to additional information are available at www.SMA-Solar.com.

Document title Document type

Important Information on Transportation and Installation for SUNNY CENTRAL 500CP-JP/
630CP-JP/800CP-JP

Important Requirements for Medium-Voltage Transformers and Transformers for Auxiliary
Power Supply for SUNNY CENTRAL Inverters of the CP XT and CP-JP Production Series

Communit - Communication Distributor for Large-Scale PV Plants for SUNNY CENTRAL,
SUNNY MINI CENTRAL or SUNNY TRIPOWER

Plant Communication in large-scale PV plants Technical Information

SUNNY CENTRAL COMMUNICATION CONTROLLER Technical Information

Q at Night - Reactive power outside of feed-in operation with SUNNY CENTRAL
500CP XT / 630CP XT / 720CP XT / 760CP XT / 800CP XT / 850CP XT / 900CP XT

Technical Information

Technical Information

Technical Information

Technical Information

Symbols

Symbol Explanation

Indicates a hazardous situation which, if not avoided, will result in death or serious injury

☐ Indicates a requirement for meeting a specific goal

☑ Desired result

✖ A problem that might occur

User Manual SCCP-JP-BA-A4-en-12 7

Indicates a hazardous situation which, if not avoided, can result in death or serious injury

Indicates a hazardous situation which, if not avoided, can result in minor or moderate injury

Indicates a situation which, if not avoided, can result in property damage

Information that is important for a specific topic or goal, but is not safety-relevant

1 Information on this Document SMA Solar Technology AG

Typographies

Typography Use Example

Bold • Display messages

• Elements on a user interface

•Parameters

•Terminals

•Slots

• Elements to be selected

• Elements to be entered

> • Connects several elements to be selected • Select PV system > Detect.

[Button/Key] • Button or key to be selected or pressed • Select [Start detection].

• Select the parameter
ExlTrfErrEna and set to Off.

• Select the tab Parameters.

Nomenclature

Complete designation Designation in this document

Sunny Central Inverter

Sunny Central Communication Controller SC-COM

Abbreviations

Abbreviation Designation Explanation

AC Alternating Current –

DC Direct Current –

FRT Fault Ride-Through Dynamic grid support

GFDI Ground-Fault Detection Interruption –

IP Internet Protocol –

LED Light-Emitting Diode –

LVRT Low-Voltage Ride-Through Limited dynamic grid support

MPP Maximum Power Point –

MSL Mean Sea Level –

OF Optical Fiber –

PC Personal Computer –

PE Protective Earth Protective conductor

PV Photovoltaics –

8 SCCP-JP-BA-A4-en-12 User Manual

SMA Solar Technology AG 2 Safety

2 Safety

2.1 Intended Use

The Sunny Central is a PV inverter which converts the direct current generated in the PV modules into grid-compliant
alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the
utility grid.

The Sunny Central is suitable for outdoor installation provided that the specified safety distances are maintained.
The Sunny Central for station installation is suitable exclusively for indoor installation provided that the specified safety
distances are maintained. The enclosure conforms with degree of protection IP54. The Sunny Central is classified under
Class 4C2 according to EN 60721-3-4 and is suitable for operation in a chemically active environment.

The maximum permissible DC input voltage of the Sunny Central must not be exceeded.
The Sunny Central must only be operated in conjunction with a suitable MV transformer. The MV transformer must be

designed for voltages that arise during pulsed mode of the Sunny Central. The maximum AC voltages to ground are as
follows:

• For inverter type SC 500CP-JP, voltages of max. ±800 V to ground.

• For inverter types SC 630CP-JP und SC800CP-JP, voltages of max. ±1,450 V to ground.

You will find further information in the Technical Information "Medium-Voltage Transformer - Important Requirements for
Medium-Voltage Transformers and Transformers for Auxiliary Power Supply for SUNNY CENTRAL Inverters of the CP XT
and CP-JP Production Series" at www.SMA-Solar.com.

Do not disconnect or adjust settings that affect grid management services without first obtaining approval from the grid
operator.

For safety reasons, it is not permitted to modify the product or install components that are not explicitly recommended or
distributed by SMA Solar Technology AG for this product.

Only use this product in accordance with the enclosed documentation and with the local standards and directives.
Any other use can result in personal injury and property damage.

Suitable personal protective clothing is to be worn by all persons working on or with the Sunny Central.
Unauthorized persons must not operate the Sunny Central and must be kept at a safe distance from the Sunny Central.
The Sunny Central must not be operated with its doors open.
The Sunny Central must not be opened when it is raining or when humidity exceeds 95%.
The Sunny Central must not be operated with any technical defects.
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for future

reference and observe all instructions contained therein.
Any use of the Sunny Central other than that described in the Intended Use section does not qualify as appropriate.

User Manual SCCP-JP-BA-A4-en-12 9

2 Safety SMA Solar Technology AG

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2.2 Safety Precautions

This section contains safety precautions that must be observed at all times when working on or with the product.
To prevent personal injury and property damage and to ensure long-term operation of the product, read this section
carefully and follow all safety precautions at all times.

Danger to life from electric shock due to live voltage

High voltages are present in the live components of the Sunny Central. Touching live components results in death or
serious injury due to electric shock.

• When working in a high contact-risk environment, wear personal protective equipment.

• Do not touch any live components.

• Follow the instructions precisely.

• Observe all warning messages on the product and in the documentation.

• Observe all safety precautions of the module manufacturer.

• Provided live voltage is not absolutely necessary, always disconnect the following components from voltage
sources before performing any work on the inverter:

– Line voltage for grid feed-in
– Internal power supply
– DC voltage from the PV array
– Additional external voltages, e.g. control signals from a control room

• Ensure that no disconnected components can be reconnected.

• After disconnecting the Sunny Central from voltage sources, wait at least 15 minutes for the capacitors to
discharge completely before opening the Sunny Central.

• Before working on the Sunny Central, check that all devices are completely voltage-free.

• Ground and short-circuit.

• Cover or isolate any adjacent live components.

Danger to life from electric shock due to live DC cables

DC cables connected to PV modules that are exposed to sunlight carry live voltage. Touching live cables results in death
or serious injury.

• Wear suitable personal protective equipment for all work on the Sunny Central.

Danger to life from electric shock due to ground fault

If a ground fault has occurred, parts of the PV system that are supposedly grounded may in fact be live.
Touching incorrectly grounded components results in death or serious injuries from electric shock.

• Ensure that no voltage is present before touching any components of the PV system.

• Wear suitable personal protective equipment for all work on the Sunny Central.

• The Sunny Central must be installed in a closed operating area.

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Danger to life from electric shock if the Sunny Central is damaged

Operating a damaged Sunny Central can lead to hazardous situations that result in death or serious injuries due to
electric shock.

• Only use the Sunny Central when it is in a technically faultless condition and safe to operate.

• Regularly check the Sunny Central for visible damage.

• Make sure that all external safety equipment is freely accessible at all times.

• Make sure that all safety equipment is in good working order.

• Wear suitable personal protective equipment for all work on the Sunny Central.

Danger to life from electric shock if the Sunny Central is not locked

If the Sunny Central is not locked, unauthorized persons will have access to live components carrying lethal voltages.
Touching live components can result in death or serious injury due to electric shock.

• Always close and lock the Sunny Central.

• Remove the keys from the door locks and from the key switch.

• Store the key in a safe place.

• Ensure that unauthorized persons do not have access to the PV system.

Danger to life due to blocked escape routes

In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two
Sunny Central inverters located opposite each other blocks the escape route. It is imperative that the escape route is
freely accessible at all times.

• An escape route with a passage width of at least 500 mm must be available at all times. Make sure the minimum
passage width of the escape route meets local standards.

• Do not place any objects in the escape route area.

• Remove all tripping hazards from escape routes.

• If two Sunny Central inverters have been installed facing each other, never open the doors of both inverters
simultaneously.

Danger to life from electric shock when entering the PV field

The ground fault monitoring with GFDI, Remote GFDI or Soft Grounding does not provide protection from personal
injury when GFDI is activated. PV modules which are grounded with GFDI discharge voltage to ground. Entering the
PV field can result in lethal electric shocks.

• Configure the PV system as a closed electrical operating area.

• Before entering the PV field, switch the PV array to insulated operation.

• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .

Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides

The precharge unit for the option "Q at Night" will be charged even if the AC contactor and the DC switch are open.
Touching live components of this assembly will result in death or serious injury.

• Do not touch any live components.

• Do not remove protective covers.

• Observe the warning messages.

• Wear personal protective equipment.

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Risk of burns due to hot components

Some components of the Sunny Central can get very hot during operation. Touching these components can cause burns.

• Observe the warning messages on the devices.

• During operation, do not touch any components marked with such warnings.

• After disconnecting the PV system from voltage sources, wait until hot components have cooled down sufficiently.

• Wear suitable personal protective equipment for all work on the Sunny Central.

Damage to electronic components due to electrostatic discharge

Electrostatic discharge can damage or destroy electronic components.

• When working on the Sunny Central and handling assemblies, observe all ESD safety regulations.

• Wear suitable personal protective equipment for all work on the device.

• Discharge electrostatic charge by touching uncoated, grounded enclosure parts (e.g. near the grounding
connection on the doors). Only then is it safe to touch electronic components.

Damage to the Sunny Central due to dust or moisture penetration

Dust intrusion or moisture penetration can damage the Sunny Central or impair the functionality of the Sunny Central.

• Do not open the Sunny Central during rainfall or humidity of more than 95%.

• Only open the Sunny Central when the environment is dry and free of dust.

• Do not operate the Sunny Central with the door open.

Operation failure of the PV system due to incorrectly set parameters

If the parameter settings for grid management services are incorrect, the PV system may not be able to meet the
requirements of grid management services. This can mean that yield losses are incurred and the inverter has to be
disconnected by the grid operator.

• When setting the modes of grid management services, ensure that the control procedures agreed with the grid
operator are parameterized.

• If the PV power plant is operated with a Power Plant Controller, ensure that the mode WCtlCom for active power
limitation and the mode VArCtlCom or PFCtlCom for reactive power control are selected in the Sunny Central.

2.3 Skills of Qualified Persons

The tasks described in this document must be performed by qualified persons only. Qualified persons must have the
following skills:

• Knowledge of how a Sunny Central works and is operated

• Training in how to deal with the dangers and risks associated with installing and using electrical devices and systems

• Training in the installation and commissioning of electrical devices and systems

• Knowledge of all applicable standards and directives

• Knowledge of and adherence to this manual and all safety precautions

12 SCCP-JP-BA-A4-en-12 User Manual

SMA Solar Technology AG 2 Safety

2.4 Personal Protective Equipment

Always wear suitable protective equipment

When working on the Sunny Central, always wear the appropriate personal protective equipment for the specific
job.

The following personal protective equipment is regarded by SMA Solar Technology AG to be the minimum requirement:

☐ In a dry environment, safety shoes of category S3 with perforation-proof soles and steel toe caps
☐ During precipitation or on moist ground, safety boots of category S5 with perforation-proof soles and steel toe caps
☐ Tight-fitting work clothes made of 100% cotton
☐ Suitable work pants
☐ Individually fitted hearing protection
☐ Safety gloves

Any other prescribed protective equipment must also be used.

User Manual SCCP-JP-BA-A4-en-12 13

3 Product Description SMA Solar Technology AG

3 Product Description

3.1 PV System Overview

The Sunny Central is a PV inverter which converts the direct current generated in the PV modules into grid-compliant
alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the
utility grid.

Figure1: Principle of a grid-linked PV system with a Sunny Central

Position Designation

A PV array

B DC subdistribution (e.g. Sunny String-Monitor)

C Sunny Central

D External MV transformer, e.g. Transformer Compact Station with MV transformer

E Utility grid

The Sunny Central is controlled via the Sunny Central Communication Controller (SC-COM). The grid management
service specifications from the grid operator can be implemented via a Power Reducer Box or the Power Plant Controller.
With the "Q at Night" order option, the Sunny Central supports the utility grid with reactive power if the input voltage is
insufficient.

3.2 Sunny Central

3.2.1 Design of the Sunny Central

Figure2: Sunny Central (example)

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Position Description

A Inverter cabinet

B Interface cabinet

CTouch display

DService interface

EKey switch

3.2.2 Type Label

The type label clearly identifies the product. Two type labels are present on the Sunny Central. The type labels are
positioned on the left-hand side of the air duct inside the inverter cabinet and in the interface cabinet on the left-hand side
of the enclosure.

You will require the information on the type label to use the product safely and when seeking customer support from the
SMA Service Line. The type labels must be permanently attached to the product.

Reading off the serial number

You can read off the serial number without opening the Sunny Central. The serial number is located on the top left
corner of the Sunny Central roof. You can also read off the serial number from the touch display.

Reading off the firmware version

You can read off the version number of the Sunny Central and touch display firmware via the user interface. You can
also read off the version number of the touch display firmware on the touch display.

Symbols on the Product and on the Type Label

All symbols on the Sunny Central and the type label are explained below.

Symbol Designation Explanation

CE marking The product complies with the requirements of the applicable

EU directives.

Protection class I All electrical equipment is connected to the protective

conductor system of the product.

Degree of protection IP54 The product is protected against interior dust deposits and

splashing water from all angles.

Beware of a danger zone This warning symbol highlights a danger zone. Be particularly

vigilant and cautious when working on the product.

Beware of dangerous voltage The product operates at high voltages. All work on the

product must be carried out by qualified persons only.

Beware of hot surface The product can get hot during operation. Avoid contact

during operation. Allow the product to cool down sufficiently
before carrying out any work. Wear personal protective
equipment such as safety gloves.

Use hearing protection. The product generates loud noises. When working on the

product, wear hearing protection.

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Symbol Designation Explanation

Observe the documentation. Observe all documentation supplied with the product.

3.2.3 Operating Modes

The Sunny Central cycles through various states during operation:

Figure3: Principle overview of the operating states of the Sunny Central in normal operation

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Designation Description

Stop The Sunny Central is switched off. Stop, Fast stop or Remote shutdown active

appears on the touch display.
If the key switch is set to Start, the Sunny Central switches to the operating state

"Grid monitoring".

Grid Monitoring The Sunny Central is in the operating state "Grid monitoring". Waiting for valid AC

grid appears in the touch display.
The grid limits are monitored continuously from now on. If a grid error does not occur

during the grid monitoring time, the AC contactor closes and the Sunny Central
switches to the operating state "Grid monitoring time reached".

If the grid limits are exceeded during the monitoring time, the Sunny Central restarts
"Grid monitoring".

With the order option "Q at Night", the Sunny Central switches to the "Q at Night"
operating state if the time specified in the parameter PvStrT has elapsed and the
start voltage PvVtgStrLevMin has not been reached (see Section3.8.8 "Q at
Night", page31).

Grid Monitoring Time Reached The Sunny Central is in the operating state "Grid monitoring time reached". Waiting

for PV voltage or Waiting for utilities company appears on the touch display.
If the input voltage V

is higher than the start voltage PvVtgStrLevMin, the

PV

Sunny Central waits until the time specified in the parameter PvStrT has elapsed.
If the input voltage V

does not fall below the start voltage PvVtgStrLevMin during

PV

this time, the Sunny Central checks whether the AC grid is connected.
If a valid AC grid is connected, the Sunny Central switches to the operating state

"Startup".
The start voltage PvVtgStrLevMin must be adjusted to conform with the PV array

connected to the Sunny Central.

Startup The Sunny Central is in the operating state "Startup". Operation appears on the

touch display.

In normal operation: active power ramp-up

The inverter works up to its feed-in power via a ramp. This means that the inverter
gradually increases the ratio of feed-in power per second by the value set in the
parameter WGra.

If you do not set this parameter, the inverter will reach its maximum feed-in power in
1 s (see Section7.5 "Setting the Active Power Ramp-Up", page47).

After grid fault: decoupling protection ramp

After a grid fault, the inverter restarts at a maximum of 10% nominal power per
minute using a decoupling protection ramp. You have the option of switching this
decoupling protection ramp on or off. If you deactivate the decoupling protection
ramp, the inverter rapidly reverts to maximum power. If you wish to deactivate the
decoupling protection ramp, consult the SMA Service Line.

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Designation Description

MPP load operation In MPP operation, the Sunny Central feeds power into the utility grid and operates

permanently at the maximum power point (MPP). Operation and the amount of
power being fed in appear on the touch display.

If the measured power P
minimum feed-in power PvPwrMin or the key switch is set to Stop,
the Sunny Central switches to the operating state "Shutdown".

With the order option "Q at Night", the Sunny Central switches to the operating state
"Q at Night" if the measured power P
than the minimum feed-in power PvPwrMin (see Section3.8.8 "Q at Night",
page31).

Shutdown The Sunny Central is in the operating state "Shutdown". Operation appears on the

touch display.
If the key switch is set to Stop, the Sunny Central switches to the operating state

"Stop". The AC contactor and the DC switchgear open automatically.
If the Sunny Central shuts down because the feed-in conditions are no longer met,

the Sunny Central switches to the operating state "Grid monitoring".

during the time interval PvPwrMinT is less than the

PV

during the time interval PvPwrMinT is less

PV

Disturbance If a disturbance occurs during operation, the Sunny Central switches off and displays

the word Fault and the actual disturbance in the touch display (see Section10
"Troubleshooting", page75).

3.2.4 Touch Display

Different kinds of Sunny Central data can be viewed on the touch display. You cannot use the touch display to set any
Sunny Central parameters, but only to configure display settings such as language, time and brightness.

The display screen is activated by touching the touch display. Tapping the symbols on the touch display activates the
corresponding functions. If the touch display has not been touched for five minutes, it will switch off.

3.2.5 Key Switch

The key switch is used to switch the Sunny Central on and off.

Switch Position "Start"

If the key switch is turned to Start, a motor drive switches the DC switchgear on and the Sunny Central switches from the
operating state "Stop" to the operating state "Grid monitoring". Providing there is sufficient irradiation and a valid utility
grid connection, the Sunny Central switches to feed-in operation. If there is insufficient irradiation and the input voltage is
therefore too low, the Sunny Central remains in the operating state "Grid monitoring".

With the order option "Q at Night", the inverter can support the utility grid with reactive power as required.

Switch Position "Stop"

If the key switch is turned to Stop while the Sunny Central is in the operating state "Grid monitoring", a motor drive
switches the DC switchgear off. The Sunny Central switches to the operating state "Stop".

If the key switch is turned to Stop while the Sunny Central is in the operating state "MPP load operation",
the Sunny Central switches to the operating state "Shutdown". Once the shutdown is complete, the AC contactor and the
DC switchgear are switched off automatically and the Sunny Central switches to the operating state "Stop".

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3.3 Sunny Central Communication Controller

The Sunny Central Communication Controller (SC-COM) is the central communication interface of the Sunny Central.
The SC-COM establishes the connection between the Sunny Central and the PV system operator.

Figure4: SC-COM

Position Designation

ASC-COM

The SC-COM collects all data from the connected devices. The SC-COM enables monitoring, parameterization and
remote diagnosis of the Sunny Central via computer, as well as power control by the grid operator.

The various tasks performed by the SC-COM can be split into two separate networks:

• Monitoring network
This network is used for monitoring, parameterization and remote diagnosis.

• Control network
This network is used by the Power Reducer Box or Power Plant Controller to transmit grid management specifications

issued by the grid operator to the Sunny Central. The use of the control network exclusively for grid management
services ensures that the setpoints will always be transmitted and implemented within the specified time period.

If only a low data transfer rate is required for monitoring the PV system, the grid operator instructions can also be
transmitted via the monitoring network. In this case, only one network is required.

The SC-COM makes all the collected data available to the PV system operator via an Ethernet connection.
Copper cables or optical fibers can be used for the networks.

Type of communication of the PV system

The interface of the SC-COM is set by default to COM3 and the baud rate to 119,200. Do not modify these settings.

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3.4 Sunny Central String-Monitor Controller

Depending on the order option, the Sunny Central may be equipped with a Sunny Central String-Monitor Controller for
string-current monitoring. This controller allows communication between the Sunny Central String-Monitors and the
Sunny Central.

Figure5: Sunny Central String-Monitor Controller

The Sunny String-Monitors measure the string currents via an integrated measurement PCB and continuously calculate the
mean values of the string currents. The measurement PCB compares the string currents with the mean values. If a string
current exceeds or falls short of the specified tolerance for the mean value, a warning or error is generated and displayed
on the touch display and on the user interface.

3.5 Remote Shutdown

By means of remote shutdown, you can selectively shut down and switch off the Sunny Central within approximately
six seconds, for example, from a control room. The function of the remote shutdown is similar to the stop function of the
key switch.

If the remote shutdown function is activated from the control room while the Sunny Central is in the operating state
"Grid monitoring", a motor drive automatically shuts off the DC switchgear and the Sunny Central switches to the
operating state "Stop".

If the remote shutdown function is activated from the control room while the Sunny Central is in the operating state
"MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once the shutdown is complete,
the AC contactor and the DC switchgear are switched off automatically and the Sunny Central switches to the operating
state "Stop".

The remote shutdown function is designed as an open-circuit fail-safe system and must be operated with an external 24 V
voltage supply.

If 24 V is present in the remote shutdown, the Sunny Central continues to operate in the current operating state. If the
remote shutdown function is triggered or if a wire-break occurs, 0 V is present in the remote shutdown and the
Sunny Central switches from its current operating state to the operating state "Stop".

Use of the remote shutdown will only be possible if the parameter ExlStrStpEna is set to On.

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3.6 External Fast Stop

The Sunny Central is equipped ex works with a fast stop input. You have the option of connecting an external switch to
this fast stop input which is activated via a 24 V signal.

The external fast stop disconnects the Sunny Central from the utility grid in less than 100 ms.
The Sunny Central is delivered ex works with open terminals. The following options are available for configuring the

external fast stop:

• The external fast stop is deactivated:
The terminals of the active fast stop are bridged. The fast stop function is thus deactivated. You will need to bridge

the terminals if required.

• The external fast stop is operated via an internal 24 V supply:
An external latching switch (break contact) is connected to the Sunny Central terminals via the internal supply

voltage in the Sunny Central. When the switch is closed, the all-or-nothing relay is activated and the Sunny Central
feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is
stopped and no longer feeds energy into the grid.

• The external fast stop is operated with external 24 V supply:
An external latching switch (break contact) is connected to the Sunny Central terminals via an external 24 V voltage

supply. When the switch is closed, the all-or-nothing relay is activated and the Sunny Central feeds into the grid.
If the fast stop is tripped, the switch opens and the relay is deactivated. The Sunny Central is stopped and no longer
feeds energy into the grid.

Tripping the fast stop

The fast stop should only be tripped in the event of imminent danger. The tripping of the fast stop does not entail fast
discharge of the capacitors. If you wish to use an external signal to switch the Sunny Central off in a controlled
manner, you should use the input of the remote shutdown function.

3.7 Ground-Fault Monitoring and Insulation Monitoring

The different types of insulation and ground-fault monitoring are described in this section. The type of Sunny Central
insulation and ground-fault monitoring depends on the order option.

3.7.1 Mode of Operation

The insulation and ground-fault monitoring ensure system protection. The type of monitoring depends on whether the
PV array is grounded or not.

In Grounded PV Arrays

The ground-fault monitoring is implemented by means of a residual-current monitoring device. If a ground fault occurs,
the residual currents are detected and interrupted.

• Ground fault on the ungrounded terminal
If a ground fault occurs on the ungrounded terminal of the PV array, the normally ungrounded terminal of the

PV array is grounded non-specifically by the ground fault and a residual current flows to the grounded terminal.
This residual current flows through the ground-fault monitoring device, e.g. the GFDI, and triggers it.

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• Ground fault on the grounded terminal

The GFDI is bypassed when a ground fault occurs on the grounded terminal of the PV array. A ground fault on the
grounded terminal cannot be reliably detected. If an undetected ground fault occurs on the grounded terminal,
this will pose a safety risk. A further ground fault occurring on the ungrounded terminal will lead to high residual
currents that cannot be interrupted by the ground-fault monitoring unit.

Information:

In order to ensure the residual current monitoring function in grounded systems, the PV array insulation must be
checked at regular intervals. It is therefore advisable to use an additional insulation monitoring device in
grounded systems. This will enable the insulation to be checked at regular intervals.

In Ungrounded PV Arrays

An insulation monitoring device constantly determines the insulation resistance using an active measurement procedure.
As soon as the insulation resistance falls below the warning threshold specified in the insulation monitoring device, an
insulation warning will appear on the touch display. As a result, preventative measures can be taken before errors occur,
e.g., personal hazard due to leakage currents, or system failure. If the insulation resistance falls below the configured
warning threshold, the system may be switched off. Use the parameter IsoErrIgn to activate or deactivate the
disconnection process under fault conditions.

3.7.2 Ground-Fault Monitoring in Grounded PV Arrays

3.7.2.1 Ground Fault Detection and Interruption (GFDI)

Depending on the order option, ground-fault monitoring in the Sunny Central can be carried out via ground fault detection
and interruption. This grounds one terminal of the PV array.

GFDI is performed via a K-type circuit breaker with adjustable operating current. The GFDI is integrated in the
Sunny Central and connected between an input busbar and the grounding busbar.

Figure6: GFDI in the Sunny Central

Position Designation

AGFDI

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3.7.2.2 Remote GFDI

Depending on the order option, ground-fault monitoring in the Sunny Central can be carried out via ground-fault detection
and interruption with motor drive, in short "Remote GFDI". This grounds one terminal of the PV array. Remote GFDI also
enables automatic error processing. This reduces downtimes and avoids service calls due to temporary insulation errors
such as when condensation occurs on the PV modules.

Remote GFDI is performed via a K-type circuit breaker with adjustable operating current. The Remote GFDI is integrated
in the Sunny Central and connected between an input busbar and the grounding busbar.

Figure7: Remote GFDI in the Sunny Central

If the Remote GFDI triggers, initially a temporary error will be assumed and a motor drive will close the Remote GFDI
after a defined delay. No external switch command is required to close the triggered Remote GFDI. The Sunny Central
will switch back to feed-in operation after a defined delay.

In the default setting of the Sunny Central, the software will attempt to start the Remote GFDI up to three times per day.
If the Remote GFDI triggers on several consecutive days, the software will assume that a permanent insulation error has

occurred, and the Sunny Central will no longer revert to operation. In this case, a qualified person will need to check and,
if necessary, repair the insulation and then acknowledge the error.

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3.7.2.3 Soft Grounding

Depending on the order option, the Sunny Central can also monitor for ground faults via Soft Grounding. This process
grounds one terminal of the PV array via a resistor. The PV system must be operated as an electrically closed operation
area.

Figure8: Soft Grounding in the Sunny Central

If a ground fault occurs on the ungrounded terminal of the PV array, a residual current will occur through the
Soft Grounding resistor. The residual current increases the voltage of the grounded terminal against ground potential.
This enables monitoring of insulation with Soft Grounding using a voltage measurement at the Soft Grounding resistor.

If the measured voltage exceeds a threshold, the PV array grounding is overridden and the residual current is interrupted.
If a Soft Grounding error occurs, the Sunny Central stops operating. A qualified person is required to check and,

if necessary, repair the insulation and reactivate the Sunny Central via the reset button.
It is not possible to detect an insulation error on the grounded pole.

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3.7.3 Insulation Monitoring

3.7.3.1 Insulation Monitoring Device

Depending on the order option, an insulation monitoring device can monitor the insulation resistance of the PV system in
ungrounded PV arrays.

In the operating state "MPP load operation", the insulation resistance of the entire system, from the PV array to the
MV transformer, will be measured.

If the Sunny Central is in the operating state "Grid monitoring", only the insulation resistance from the PV array to the
Sunny Central will be measured.

Figure9: Insulation monitoring device in the Sunny Central

A measuring circuit and a relay with a change-over contact are integrated in the insulation monitoring device.
The insulation monitoring device is connected between the PV voltage and the grounding conductor. The contacts of the

relay are routed to the connection area and can be used to trip a signal light or siren. The characteristics of the relay are
indicated in the circuit diagram.

If the insulation resistance falls below the warning threshold specified in the RisoCtlWarn parameter, the measuring
circuit closes and the LED ALARM1 on the insulation monitoring device lights up. The error message 3601‒ Warning
insulation error is generated by the inverter. Simultaneously, the insulation monitoring device activates the relay with
changeover contact. This relay is integrated in the Sunny Central.

If the insulation resistance falls below the error threshold (1 kΩ), an insulation error has occurred and the LEDs ALARM1
and ALARM2 on the insulation monitoring device light up. In this case, the operating behavior of the inverter can be set
via parameters as follows:

• If the parameter IsoErrIgn is set to Off, the measuring circuit issues a disturbance when the insulation resistance falls
below the error threshold, the Sunny Central switches off and issues the error message 3501 - Insulation error.
The LEDs ALARM1 and ALARM2 are lit.

• If the parameter IsoErrIgn is set to On, the error message from the measuring circuit is ignored when the insulation
resistance falls below the error threshold. The Sunny Central continues to feed into the grid and generates the error
message 3504 ‒ Insulation error ignored.

• If the parameter IsoErrIgn is set to Run and the insulation resistance falls below the error threshold, the error
message from the measuring circuit will only be ignored if the inverter is in feed-in operation. In feed-in operation,
the Sunny Central continues to feed in and issues the error message 3504 ‒ Insulation error ignored. If the
insulation resistance falls below the error threshold in another operating state, the error will not be ignored and the
Sunny Central will not go into feed-in operation. The error message 3501 ‒ Insulation error appears on the touch
display. The LEDs ALARM1 and ALARM2 are lit.

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Type of insulation monitoring device used

The insulation monitoring device used is the A-ISOMETER iso-PV1685 device supplied by Bender GmbH & Co. KG.

3.7.4 Combined Insulation and Ground-Fault Monitoring

3.7.4.1 GFDI and Insulation Monitoring Device

With the order option "GFDI and Insulation Monitoring", it is possible to temporarily disable the PV array grounding and
to check the insulation via the integrated insulation monitoring device.

When the GFDI is closed, the PV array is grounded. In this state, the insulation resistance cannot be determined.
When the GFDI is open, grounding is disabled. In this state, the insulation monitoring device continuously measures the

insulation resistance. In the operating state "MPP load operation", the insulation resistance of the entire system, from the
PV array to the MV transformer, will be measured. If the Sunny Central is in the operating state "Grid monitoring", only
the insulation resistance from the PV array to the Sunny Central will be measured.

Insulation monitoring should be performed in the operating state "MPP load operation" so that all sections of the
PV system are included in the insulation measurement.

Insulation Monitoring

The insulation monitoring device will start measuring once the GFDI is open. The insulation monitoring device will initially
assume that the insulation is poor. If the parameter IsoErrIgn is set to Off, the Sunny Central will switch off temporarily.

The insulation monitoring device takes approximately five minutes to detect the correct insulation resistance. The value of
the insulation resistance can be read off from the user interface in the instantaneous value Riso. If the insulation is intact,
the Sunny Central switches back to the operating state "MPP load operation." Once the insulation monitoring process is
complete, the GFDI should be closed again, thus enabling the PV array to revert to grounded operation.

If after approximately five minutes one of the errors 3501 ‒ Insulation error, 3504 ‒ Insulation error ignored,
or 3601 ‒ Warning insulation error is displayed, the insulation is defective. In this case, a qualified person will need
to check and, if necessary, repair the insulation and then acknowledge the error.

Type of insulation monitoring device used

The insulation monitoring device used is the A-ISOMETER iso-PV1685 device supplied by Bender GmbH & Co. KG.

3.7.4.2 Remote GFDI and Insulation Monitoring Device

With the order option "Remote GFDI and Insulation Monitoring", it is possible to automatically correct errors which have
occurred, to temporarily disable the grounding connection of the PV array and to check the insulation with the integrated
insulation monitoring device.

When the Remote GFDI is closed, the PV array is grounded. In this state, the insulation resistance cannot be determined.
If the Remote GFDI triggers, initially a temporary error will be assumed and a motor drive will close the Remote GFDI
after a defined delay. No external switch command is required to close the triggered Remote GFDI. The Sunny Central
will switch back to feed-in operation after a defined delay.

In the default setting of the Sunny Central, the software will attempt to start the Remote GFDI up to three times per day.
If the Remote GFDI triggers on several consecutive days, the software will assume that a permanent insulation error has

occurred, and the Sunny Central will no longer revert to operation. In this case, a qualified person will need to check and,
if necessary, repair the insulation and then acknowledge the error.

When the Remote GFDI is open, the grounding connection is disabled. In this state, the insulation monitoring device
continuously measures the insulation resistance. In the operating state "MPP load operation", the insulation resistance of
the entire system, from the PV array to the MV transformer, will be measured. If the Sunny Central is in the operating state
"Grid monitoring", only the insulation resistance from the PV array to the Sunny Central will be measured.

Insulation monitoring should be performed in the operating state "MPP load operation" so that all sections of the
PV system are included in the insulation measurement.

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Insulation Monitoring

To disable the grounding of the PV array, the RemMntSvc parameter must be set to On. This will open the Remote GFDI
by means of a motor drive.

If the Remote GFDI has been opened by a motor drive via the RemMntSvc parameter, the insulation monitoring device
will start measuring after the delay defined in the IsoMeasDly parameter has elapsed. This allows the insulation
monitoring device to determine the insulation resistance without interrupting the feed-in operation. If an insulation error is
present, this will only be taken into account at the end of the delay time.

Once the insulation monitoring process is complete, the parameter RemMntSvc should be set to Off, thus putting the
PV array into grounded operation.

If, after approximately five minutes, one of the errors 3501 ‒ Insulation error, 3504 ‒ Insulation error ignored,
or 3601 ‒ Warning insulation error is displayed, the insulation is defective. In this case, a qualified person will need
to check and, if necessary, repair the insulation and then acknowledge the error.

Type of insulation monitoring device used

The insulation monitoring device used is the A-ISOMETER iso-PV1685 device supplied by Bender GmbH & Co. KG.

3.7.4.3 Remote Soft Grounding and Insulation Monitoring Device

With the order option "Remote Soft Grounding and Insulation Monitoring", it is possible to detect any faults that have
occurred, to disable the grounding of the PV array and to check the insulation with the integrated insulation monitoring
device.

When the Remote Soft Grounding is closed, the PV array is grounded. In this state, the insulation resistance cannot be
determined.

If the Remote Soft Grounding triggers, initially a temporary error will be assumed and the Remote Soft Grounding will be
closed again by a relay after a defined delay. No external switch command is required to close the triggered Remote
Soft Grounding. The Sunny Central will switch back to feed-in operation after a defined delay.

In the default setting, the Sunny Central software will attempt to start the Remote Soft Grounding up to three times per day.
If the Remote Soft Grounding triggers on several consecutive days, the software will assume that a permanent insulation

error has occurred and the Sunny Central will no longer revert to operation. In this case, a qualified person will need to
check and, if necessary, repair the insulation and then acknowledge the error.

When the Remote Soft Grounding is open, the grounding connection is disabled. In this state, the insulation monitoring
device continuously measures the insulation resistance. In the operating state "MPP load operation", the insulation
resistance of the entire system, from the PV array to the MV transformer, will be measured. If the Sunny Central is in the
operating state "Grid monitoring", only the insulation resistance from the PV array to the Sunny Central will be measured.

Insulation monitoring should be performed in the operating state "MPP load operation" so that all sections of the
PV system are included in the insulation measurement.

Insulation Monitoring

To disable the grounding of the PV array, the RemMntSvc parameter must be set to On. The Remote Soft Grounding
will then be opened via a high-voltage relay.

If the Remote Soft Grounding has been opened by relay via the RemMntSvc parameter, the insulation monitoring device
will start measuring after the period defined by the IsoMeasDly parameter has elapsed. This allows the insulation
monitoring device to determine the insulation resistance without interrupting the feed-in operation. If an insulation error is
present, this will only be taken into account at the end of the delay time.

Once the insulation monitoring process is complete, the parameter RemMntSvc should be set to Off, thus putting the
PV array into grounded operation.

If, after approximately five minutes, one of the errors 3501 ‒ Insulation error, 3504 ‒ Insulation error ignored,
or 3601 ‒ Warning insulation error is displayed, the insulation is defective. In this case, a qualified person will need
to check and, if necessary, repair the insulation and then acknowledge the error.

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Type of insulation monitoring device used

The insulation monitoring device used is the A-ISOMETER iso-PV1685 device supplied by Bender GmbH & Co. KG.

3.8 Grid Management Services

3.8.1 Requirements

Due to the growing number of PV systems feeding into the utility grid, these PV systems increasingly h ave to take on feed-in
management functions. In Germany, for example, they are obliged to offer grid management services. First and foremost,
the grid operator must be able to limit the power of the PV system by remote control and temporarily reduce it to zero in
critical cases. The grid operator's corresponding control commands must therefore be transmitted to the Sunny Central
inverters quickly and reliably for implementation.

The following figure shows how the specifications of the grid operator are implemented. The Power Reducer Box or
Power Plant Controller sends the specifications issued by the grid operator to the Sunny Central.

Figure10: Principle of grid integration

As an alternative to the Power Reducer Box or Power Plant Controller, there are two other ways of enabling grid
management services:

• Reception of the signals via two analog inputs on the Sunny Central

• Manual configuration of the specifications via parameters on the Sunny Central

3.8.2 Active Power Limitation

Active power can be limited independently of power frequency by five different methods. The limit can be configured via
a parameter or supplied by the grid operator as an external signal (see Section8.1.2 "Frequency-Independent Active
Power Limitation", page50).

In addition to these methods, active power can also be limited as a function of power frequency.

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3.8.3 Reactive Power Setpoint

The Sunny Central can provide reactive power. There are eleven different methods for setpoint specification.
These include entering a fixed parameter, processing an external signal from the grid operator or specifying the reactive
power using adjustable characteristic curve parameters (see Section8.2, page53).

3.8.4 Behavior in the Absence of Active and Reactive Power Setpoints

In the event of failure of setpoint specifications for active and reactive power control, the inverter is capable of bridging
the gap in one of two ways:

• Use of last default values received
As long as the inverter does not receive any updated default values, it will utilize the last value received (when

setpoint specification takes place via communication) and the last valid mean value (when using analog setpoints).

• Use of proxy values
As long as the Sunny Central does not receive any updated default values, it will utilize the specified proxy values

for active power limitation, reactive power setpoint and displacement power factor. In this case, different proxy
values can be configured for feed-in operation and grid monitoring.

The parameter PwrMonErrMod is used to configure whether the last default values (LastVal) or the configured proxy
values (SubVal) are to be utilized. This setting will be valid for both active and reactive power setpoints.

The proxy values are used when the time since receiving the last valid signal for default valu es as defined in the parameter

PwrMonErrTm has elapsed.

3.8.5 Full and Limited Dynamic Grid Support (FRT)

With full dynamic grid support, the Sunny Central supports the utility grid during a brief grid voltage drop by feeding in
reactive current. In this case, the behavior of the Sunny Central depends on the percentage ratio of the line voltage V
to nominal voltage V.

With limited dynamic grid support, the Sunny Central interrupts grid feed-in during the grid voltage drop.

Grid

Figure11: Maximum duration of a voltage drop that the Sunny Central can bridge without disconnecting from the utility grid

User Manual SCCP-JP-BA-A4-en-12 29

3 Product Description SMA Solar Technology AG

Ratio V

90% to 100% The ratio of line voltage V

/V Behavior of the Sunny Central

Grid

to nominal voltage V is in the normal range and the Sunny Central

Grid

feeds in without any problem.

20% to 90% The ratio of line voltage V

to nominal voltage V is in the critical range. There is a disturbance

Grid

in the utility grid. While this error is present, the Sunny Central supports the utility grid with reactive
current. The Sunny Central can bridge errors of up to 5 s without disconnecting from the utility grid.
If the configured grid monitoring time is exceeded during this period, the Sunny Central
disconnects from the utility grid.

0% to 20% The ratio of line voltage V

to nominal voltage V is in the critical range. There is a disturbance

Grid

in the utility grid. While this disturbance is present, the Sunny Central supports the utility grid with
reactive current. The Sunny Central can bridge disturbances of up to 1.2 s without disconnecting
from the utility grid. This is provided that the V

/V ratio was >= 90% before the fault occurred.

Grid

If the set grid monitoring time is exceeded during this period, the Sunny Central disconnects from
the utility grid.

The dynamic grid support function is configured via the parameter FRTEna. The level of reactive current provided with
full dynamic grid support is determined via the parameter FRTArGraNom.

For the order option "Q at Night", limited dynamic grid support is available in the operating state "Q at Night".

3.8.6 Decoupling Protection Ramp

After a grid fault, the Sunny Central restarts at a maximum of 10% nominal power per minute using a decoupling
protection ramp. You have the option of switching this decoupling protection ramp on or off. If you deactivate the
decoupling protection ramp, the Sunny Central rapidly reverts to maximum power. If you wish to deactivate the
decoupling protection ramp, contact the SMA Service Line.

Compliance with the Medium-Voltage Directive

The decoupling protection ramp is part of the Medium-Voltage Directive of the German Association of Energy and
Water Industries (BDEW) and must not be deactivated in Germany.

3.8.7 Grid Management Shutdown

If the utility grid becomes unstable, grid management requires that the Sunny Central disconnects from the utility grid
immediately to avoid grid overload. In this event a corresponding Modbus signal will be provided by the grid operator
or the safety system at the grid transfer point. The Sunny Central disconnects from the utility grid immediately and displays
the error 9013. The error will be reset in the Sunny Central after a signal from the grid operator or the safety system for
the grid transfer point.

30 SCCP-JP-BA-A4-en-12 User Manual