Sma SB 3000TL User Manual Page 28
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☐ The positive connection cables of the PV modules must be fitted with the positive DC
connectors (for information on assembling DC connectors, see the DC connector installation
manual).
☐ The negative connection cables of the PV modules must be fitted with the negative DC
connectors (for information on assembling DC connectors, see the DC connector installation
manual).
☐ If the inverter is not equipped with an ESS and the regulations in the country of installation
require an external DC load-break switch, you must install an external DC load-break switch.
Use of Y adapters for parallel connection of strings
The Y adapters must not be used to interrupt the DC circuit.
• Do not use the Y adapters in the immediate vicinity of the inverter. The adapters must not
be visible or freely accessible.
• In order to interrupt the DC circuit, always disconnect the inverter as described in this
document (see Section10, page45).
Reduced electromagnetic compatibility of the inverter in case of incorrect DC
connection
If the positive terminal and the negative terminal of a string are not connected to the same
input, electromagnetic compatibility of the inverter cannot be guaranteed. As a result, the
inverter can cause electromagnetic interference in other devices.
• Always connect the positive terminal and the negative terminal of one string to the same
input.
6.4.2 Connecting the PV Array
Destruction of the inverter due to overvoltage
If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
the inverter can be destroyed due to overvoltage.
• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the
inverter, do not connect any strings to the inverter and check the design of the PV system.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range of 1,000 V or higher.
6 Electrical Connection
SMA Solar Technology AG
Operating ManualSB30-50TL-21-BE-en-1128
- OperatingManual 1
- Legal Provisions 2
- Table of Contents 3
- 1.1 Validity 6
- 1.2 Target Group 6
- 1.3 Additional Information 6
- 1.4 Symbols 7
- 1.5 Nomenclature 7
- Electronic Solar Switch ESS 8
- 2 Safety 10
- SMA Solar Technology AG 10
- 3 Scope of Delivery 11
- 4 Product Description 12
- * Optional 13
- 4.2 Interfaces and Functions 15
- Fan retrofit kit 16
- SMAOptiTracGlobalPeak 16
- SMA Power Control Module 16
- Multifunction Relay 16
- 5 Mounting 17
- Dimensions for mounting: 18
- 5.2 Mounting the Inverter 19
- 6 Electrical Connection 21
- 6.2.1 View from Below 22
- 6.2.2 Interior View 23
- 6.3 AC Connection 24
- 6.4 DC Connection 27
- 6.4.2 Connecting the PV Array 28
- 7 Commissioning 31
- 7.3 Setting the NetID 32
- 7.5.1 Starting the Self-Test 35
- 5. Recommission the inverter 37
- Section7.5.1, page35) 37
- 8 Configuration 38
- 9 Operation 41
- 11 Technical Data 47
- Efficiency 48
- DC Input 48
- AC Output 49
- 11.2 General Data 50
- 11.3 Protective Devices 51
- 11.4 Climatic Conditions 52
- 11.5 Equipment 52
- 11.6 Torques 52
- 11.7 ElectronicSolarSwitch 53
- 11.8 Data Storage Capacity 53
- 12 Accessories 54
- 13 Contact 55
- 5%6!78% 57
- 9:;*<+%,='3)>+% 57
- SMA Solar Technology 60
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