SMA SUNNY CENTRAL 500CP XT User manual

SCCPXT-IA-D7-en-42 | 98-105500.01 | Version 4.2 ENGLISH
Installation Manual
SUNNY CENTRAL 500CP XT / 630CP XT / 720CP XT / 760CP XT
800CP XT / 850CP XT / 900CP XT

Legal Provisions SMA Solar Technology AG
2 SCCPXT-IA-D7-en-42 Installation Manual
Legal Provisions
The information contained in this document is the property of SMA Solar Technology AG. Publishing its content, either partially or in full, requires
the written permission of SMA Solar Technology AG. Any internal company copying of the document for the purposes of evaluating the product or
its correct implementation is allowed and does not require permission.
SMA Warranty
You can download the current warranty conditions from the Internet at www.SMA-Solar.com.
Trademarks
All trademarks are recognized even if these are not marked separately. Missing designations do not mean that a product or brand is not a registered
trademark.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by
SMA Solar Technology AG is under license.
QR Code® is a registered trademark of DENSO WAVE INCORPORATED.
SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. [phone]
Fax [phone]
www.SMA.de
E-mail: [email protected]
© 2004 to 2014 SMA Solar Technology AG. All rights reserved

SMA Solar Technology AG Table of Contents
Installation Manual SCCPXT-IA-D7-en-42 3
Table of Contents
1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Personal Protective Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 PV System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Sunny Central. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.1 Design of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.2.2 Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.2.3 Touch Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.2.4 Key Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.3 Sunny Central Communication Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 External Fast Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6 Grounding Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7 Low-Temperature Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.8 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Scope of Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Preparation for Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 Selecting a Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.1 Requirements for the Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
6.1.2 Dimensions of a Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
6.1.3 Minimum Clearances for Outdoor Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6.1.4 Minimum Clearances for Installation in Electrical Equipment Rooms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.1.5 Requirements for Foundation and Cable Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6.1.6 Requirements for Cable Routing between MV Transformer and Sunny Central . . . . . . . . . . . . . . . . . . . . . . . .25
6.2 Preparation for Mounting without Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2.1 Position of the Mounting Holes on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.2.2 Drilling Mounting Holes in the Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.3 Preparation for Mounting on a Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7 Transporting the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.1 Safety during Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2 Center of Gravity of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.3 Mounting the Kick Plates at the Rear of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.4 Transporting the Sunny Central Using a Crane Fork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.5 Transporting the Sunny Central Using a Forklift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.6 Transporting the Sunny Central Using a Pallet Truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.7 Transporting the Sunny Central Using a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.7.1 Disassembling the Roof of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Table of Contents SMA Solar Technology AG
4 SCCPXT-IA-D7-en-42 Installation Manual
7.7.2 Transporting the Sunny Central Using a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.7.3 Mounting the Roof of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
8 Installing the Sunny Central. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
8.1 Attaching the Sunny Central without Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2 Installing the Sunny Central with Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.3 Disassembling the Panels on the Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.4 Removing the Transport Lock from the Inverter Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.5 Replacing the Desiccant Bag in the Inverter Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.6 Mounting the Ventilation Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9 Grounding Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
9.1 Cable and Terminal Lug Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.2 Connecting the Grounding Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10 DC Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
10.1 Safety during DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.2 DC Connection with DC Fuse Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.2.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
10.2.2 Connection Area with DC Fuse Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
10.2.3 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
10.2.4 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
10.2.5 Connecting the SMB Connection Kit to DC Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
10.2.6 Connecting DC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
10.3 DC Connection with DC Busbar Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10.3.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.3.2 Connection Area with DC Busbar Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.3.3 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.3.4 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.3.5 Connecting the DC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
11 AC Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
11.1 Safety during AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.2 Connecting AC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.2.1 Cable and Terminal Lug Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
11.2.2 Connection with One Terminal Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
11.2.3 Connection with Two Terminal Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
11.2.4 Connecting the AC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
12 Cable Connection of External Devices and Connections in the Interface Cabinet . . . . . . . . . .54
12.1 Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
12.2 Leading the Cables into the Interface Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
12.3 Connecting the Cables in the Interface Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
12.3.1 Connecting the Cables to the Connecting Terminal Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
12.3.2 Connecting the Data Cable from the Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
12.3.3 Connecting the Remote Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
12.3.4 Connecting the External Setpoint Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
12.3.5 Connecting the Cable for the Status Report of the Insulation Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
12.3.6 Connecting the Cable for the Status Report of the AC Contactor Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . .59
12.3.7 Connecting the Transformer Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

SMA Solar Technology AG Table of Contents
Installation Manual SCCPXT-IA-D7-en-42 5
12.3.8 Connecting the External Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
12.3.9 Connecting the External Fast Stop Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
13 Setting up a System Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
13.1 Structure of a System Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
13.2 Position of the Communication Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
13.2.1 Connection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
13.2.2 Setting up a System Network with Optical Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
13.2.3 Setting up a PV System Network with Copper Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
14 Disconnecting the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
15 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
15.1 Sequence of Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
15.2 Checking the Sunny Central Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
15.3 Checking the Voltages on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
15.3.1 Checking the DC Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
15.3.2 Checking the AC Line Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
15.3.3 Checking the Internal Voltage Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
15.4 Checking the Grid Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
15.5 Important Measures in Case of Non-Utilized Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
15.6 Inserting the Disconnection Blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
15.7 Switching the Voltage Supply and the AC Circuit Breaker On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
15.8 Mounting the Panels and Protective Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
15.9 Switching the Sunny Central On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
16 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
17 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
17.1 Sunny Central 500CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
17.2 Sunny Central 630CPXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
17.3 Sunny Central 720CPXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
17.4 Sunny Central 760CPXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
17.5 Sunny Central 800CPXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
17.6 Sunny Central 850CP XT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
17.7 Sunny Central 900CPXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
18 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

1 Information on this Document SMA Solar Technology AG
6 SCCPXT-IA-D7-en-42 Installation Manual
1 Information on this Document
Validity
This document is valid for the following device types from production version D7:
• SC 500CP-10 (Sunny Central 500CP XT)
• SC 630CP-10 (Sunny Central 630CP XT)
• SC 720CP-10 (Sunny Central 720CP XT)
• SC 760CP-10 (Sunny Central 760CP XT)
• SC 800CP-10 (Sunny Central 800CP XT)
• SC 850CP-10 (Sunny Central 850CP XT)
• SC 900CP-10 (Sunny Central 900CP XT)
The production version is indicated on the type label.
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 can be found at www.SMA- Solar.com.
Document title Document type
Installation Requirements - Important Information on Transportation and Installation for
Sunny Central 500CP XT ⁄ 630CP XT ⁄ 720CP XT ⁄ 760CP XT ⁄ 800CP XT ⁄ 850CP XT ⁄
900CP XT
Technical Information
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
Technical Information
Cable Set ‒ Requirements for and Laying of Cables between Sunny Central CP and
Transformer Compact Station
Technical Information
Communit - Communication Distributor for Large-Scale PV Power Plants Technical Information
Sunny String-Monitor SSMxx-21 Technical Information
Sunny Central Communication Controller ‒ Professional PV System Monitoring for Sunny
Central Series CP
Technical Information
High-Altitude Installation ‒ Design of Central Inverters for Mounting Locations above 2,000
m MSL
Technical Information
Q at Night Technical Information

SMA Solar Technology AG 1 Information on this Document
Installation Manual SCCPXT-IA-D7-en-42 7
Symbols
Typographies
Nomenclature
Abbreviations
Symbol Explanation
'$1*(5
Indicates a hazardous situation which, if not avoided, will result in death or serious injury
:$51,1*
Indicates a hazardous situation which, if not avoided, can result in death or serious injury
&$87,21
Indicates a hazardous situation which, if not avoided, can result in minor or moderate injury
/05*$&
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
☐ Indicates a requirement for meeting a specific goal
☑ Desired result
✖ A problem that might occur
Typography Use Example
bold • Display messages
• Elements on a user interface
• Parameters
•Terminals
•Slots
• Elements to be selected
• Elements to be entered
• If the remote shutdown
function is not used, set the
parameter ExtStrStpEna
to Off during
commissioning.
Complete designation Designation in this document
Sunny Central CP XT Sunny Central or inverter
Sunny Central Communication Controller SC-COM
Abbreviation Designation Explanation
AC Alternating Current ‒
DC Direct Current ‒
ESD Electrostatic Discharge ‒
GFDI Ground-Fault Detection Interruption ‒
MPP Maximum Power Point ‒
MSL Mean Sea Level ‒
OF Optical Fiber ‒
PE Protective Earth Protective conductor
PV Photovoltaics ‒

2 Safety SMA Solar Technology AG
8 SCCPXT-IA-D7-en-42 Installation Manual
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 as per 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 can reach the
following magnitudes to ground:
• For inverter types SC 500CP XT/630CP XT/720CP XT/760CP XT/800CP XT, voltages can reach a maximum of
±1,450 V to ground.
• For inverter type SC 850CP XT / 900CP XT, voltages can reach a maximum of ±1,600 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 switch off or adjust settings that affect grid management services without first obtaining approval from the grid
operator.
Only use the product in accordance with the information provided in the enclosed documentation. Any other application
may cause personal injury or property damage.
Only persons fulfilling all of the skills for the target group are permitted to work on or with the Sunny Central.
Alterations to the product, e.g. modifications or conversions, are only permitted with the express written permission of
SMA Solar Technology AG. Making unauthorized changes will void the warranty and warranty claims and will normally
result in invalidation of the operating permit. SMA Solar Technology AG shall not be held liable for any damage caused
by such changes.
All work on the Sunny Central must be performed using appropriate tools and in compliance with the ESD protection
regulations.
Suitable personal protective equipment 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 is not deemed to be intended use.

SMA Solar Technology AG 2 Safety
Installation Manual SCCPXT-IA-D7-en-42 9
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.
'$1*(5
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.
• Wait 15 minutes after switching off the inverter before opening it. This will ensure that the capacitors are
discharged.
• 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 components results
in death or serious injury.
• Wear suitable personal protective equipment for all work on the Sunny Central.
• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.
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.
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.
• The inverter must be installed in a closed 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 .

2 Safety SMA Solar Technology AG
10 SCCPXT-IA-D7-en-42 Installation Manual
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 even if the Sunny Central is disconnected on both AC and DC sides
The precharge unit of the option "Q at Night" will carry live voltage even if the AC contactor and the DC switching unit
are open. Touching live components of this assembly will result in death or serious injury.
• Do not touch any live components.
• Switch the Sunny Central off.
• Wait 15 minutes after switching off the inverter before opening it. This will ensure that the capacitors are
discharged.
• Ensure that no voltage is present.
• Do not remove protective covers.
• Observe the warning messages.
• Wear personal protective equipment.
:$51,1*
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.
• Keep keys 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 of at least 500 mm width 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.
'$1*(5

SMA Solar Technology AG 2 Safety
Installation Manual SCCPXT-IA-D7-en-42 11
Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live bolted connections are always tightened with the exact torque specified in this document.
• When working on the device, use suitable tools only.
• Avoid repeated tightening of live bolted connections as this may result in unacceptably high torques.
&$87,21
Risk of burns due to hot components
Some components of the Sunny Central can get very hot during operation. Touching these components can cause
burns.
• Observe the warning messages on the devices.
• During operation, do not touch any components marked with such warnings.
• After disconnecting the PV system from voltage sources, wait until hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the Sunny Central.
/05*$&
Damage to the components due to dust intrusion or moisture penetration
Dust or moisture penetration can damage the Sunny Central or impair its functionality.
• Do not open the Sunny Central during rainfall or humidity of more than 95%.
• Only service the Sunny Central when the environment is dry and free of dust.
• Do not operate the Sunny Central with the door open.
• Do not connect the external supply voltage before the Sunny Central has been mounted and installed.
• Switch on the circuit breaker for external supply voltage. This will activate the heating element and internal fans so
that they can switch on automatically.
• If the installation or commissioning process is interrupted, mount all the panels of the Sunny Central.
• Close and lock the Sunny Central.
Damage to electronic components due to electrostatic discharge
Electrostatic discharge can damage or destroy electronic components.
• Observe the ESD safety regulations when working on the device.
• 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.
:$51,1*

2 Safety SMA Solar Technology AG
12 SCCPXT-IA-D7-en-42 Installation Manual
2.3 Skills of Qualified Persons
The tasks described in this manual 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
2.4 Personal Protective Equipment
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.
Always wear suitable protective equipment
When working on the Sunny Central, always wear the appropriate personal protective equipment for the specific
job.

SMA Solar Technology AG 3 Product Description
Installation Manual SCCPXT-IA-D7-en-42 13
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-tie PV system with one inverter
3.2 Sunny Central
3.2.1 Design of the Sunny Central
Figure2: Sunny Central with touch display (example)
Position Designation
A PV array
B DC sub-distribution (e.g. Sunny String-Monitor)
C Sunny Central
D External MV transformer, e.g., Transformer Compact Station with MV transformer
E Utility grid
Position Designation
A Inverter cabinet
B Interface cabinet
CTouch display
DService interface

3 Product Description SMA Solar Technology AG
14 SCCPXT-IA-D7-en-42 Installation Manual
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.
3.2.2 Type Label
The type label clearly identifies the product. There is one type label present in the Sunny Central. The type label is located
in the right-hand top corner inside the interface cabinet.
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.
Symbols on the Product
All symbols on the Sunny Central and the type label are explained below.
EKey switch
Reading off the serial number
You can identify the serial number without opening the Sunny Central. The serial number is located on the
Sunny Central on the top left corner of the 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.
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.
Observe the documentation. Observe all documentation supplied with the product.
Position Designation

SMA Solar Technology AG 3 Product Description
Installation Manual SCCPXT-IA-D7-en-42 15
3.2.3 Touch Display
Different kinds of Sunny Central data can be viewed on the touch display. On the touch display, you cannot set any
Sunny Central parameters, but only configure display settings such as language, time and brightness.
The display area 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.
3.2.4 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 automatically switches the DC switchgear on and the Sunny Central
switches from the operating state "Stop" to the operating state "Grid monitoring". If there is sufficient irradiation and a
valid utility grid connection, the Sunny Central switches to feed-in operation. If the irradiation level, and therefore the input
voltage, is too low, the Sunny Central remains in the operating state "Grid monitoring".
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
automatically switches the DC main switch 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".
3.3 Sunny Central Communication Controller
The SC-COM is the communication interface between the Sunny Central and the PV system operator.
Figure3: SC‑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 organized in two separate networks:
• Monitoring network: this network is used for monitoring, parameterization and remote diagnosis.
• Control network: the grid operator uses this network to transmit grid management specifications to the inverters.
The control network is used exclusively for grid management services that need to be transmitted and implemented
within a specified time period.

3 Product Description SMA Solar Technology AG
16 SCCPXT-IA-D7-en-42 Installation Manual
If only a low data transfer rate is required for monitoring the PV system, grid operator specifications can also be
transmitted via the monitoring network. Only one network is required in this case.
The SC-COM makes all the collected data available to the PV system operator via an Ethernet connection.
The networks can be built using copper cables or optical fibers.
3.4 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 shutdown is complete, the
AC contactor and the DC main switch are switched off automatically and the Sunny Central switches to the operating
state "Stop".
The remote shutdown is designed as a open-circuit fail-safe function and must be connected to a 24 V external supply
voltage. If 24 V is present in the remote shutdown, the Sunny Central continues to operate in the current operating state.
If the remote shutdown is tripped 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".
In order to be able to use the remote shutdown, the parameter ExlStrStpEna must be set to On.
3.5 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 necessary.
• The external fast stop is operated with internal 24 V supply.
An external latching switch (break contact) is connected to the Sunny Central terminals via the internal voltage
supply of the Sunny Central. When the switch is closed, the all-or-nothing relay is energized 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 via an 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 energized 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 of the fast stop function
The fast stop function should only be tripped in case of imminent danger. The tripping of the fast stop does not entail
rapid 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.

SMA Solar Technology AG 3 Product Description
Installation Manual SCCPXT-IA-D7-en-42 17
3.6 Grounding Concept
In accordance with the latest technology, the Sunny Central inverters are discharged to ground. As a result, leakage
currents to ground occur which must be taken into account when planning the PV system. The magnitude and distribution
of such leakage currents is influenced by the grounding concept of all the devices in the PV system.
SMA Solar Technology AG therefore recommends that when using e.g. cameras and monitoring technology, optical fiber
technology is used for the transmission of signals (see Section13.2.2 "Setting up a System Network with Optical Fibers",
page63). This will counteract possible interference sources.
The grounding of the Sunny Central and MV transformers in meshed design as recommended by
SMA Solar Technology AG reduces the level of leakage current.
3.7 Low-Temperature Option
With the "Low-temperature option", the temperature range is extended from ‒40°C to +62°C; however, the
Sunny Central will only maintain feed-in operation down to ‒25°C. If the ambient temperature falls below ‒25°C,
the Sunny Central switches to the operating state "Stop", communication is shut down and the auxiliary heating element
is activated. As soon as the ambient temperature exceeds ‒20°C, the Sunny Central resumes feed-in operation.
3.8 Schematic Diagram
Schematic diagrams in PDF format contain jump marks. By double clicking a jump mark, the display will change to the
corresponding current path or the referenced place in the equipment list.
SMA Solar Technology AG recommends using schematic diagrams in PDF format during installation. The schematic
diagrams in PDF format are available on request. Contact the SMA Service Line.

4 Scope of Delivery SMA Solar Technology AG
18 SCCPXT-IA-D7-en-42 Installation Manual
4 Scope of Delivery
Check the scope of delivery for completeness and any externally visible damage. Contact your distributor if the scope of
delivery is incomplete or damaged.
Figure4: Components included in the scope of delivery
Position Quantity Designation
A 1 Sunny Central
B 1 Ventilation plate
C5Kick plate
D 1 LV/HRC fuse handle*
*for DC fuse option
E 1 Non-woven abrasive
F 1 Desiccant bag
G68 Screw
H68Nut
I136Fender washer
K136Spring washer
L 80 Cable tie
M 3 Cable support sleeve (9.5 mm to 16 mm)
N 1 Installation manual, operating manual, circuit diagram, commissioning report
Position of the LV/HRC fuse handle
With the DC fuse option, the LV/HRC fuse handle is located on the inside of the right door of the interface cabinet.

SMA Solar Technology AG 5 Storage
Installation Manual SCCPXT-IA-D7-en-42 19
5 Storage
If the Sunny Central is to be stored prior to installation, note the following:
/05*$&
Penetrating moisture can damage the Sunny Central
• Store the Sunny Central in a closed state.
• Store the Sunny Central in a dry and covered location.
• The temperature at the storage location must be between -25°C and +70°C.
/05*$&
An uneven support surface can damage the frame construction of the Sunny Central
• The foundation must be suitable for the weight of the Sunny Central (1,900 kg).
• The unevenness of the support surface must be less than 0.25%.
Storage in cold temperatures and high humidity
If the Sunny Central is connected to the external voltage supply and the circuit breaker of the supply voltage is
switched on during storage, the heating element will activate automatically when humidity is high
(see Section12.3.8 "Connecting the External Supply Voltage", page60).
If the supply voltage is not connected during storage, the maximum storage period of the inverter is twelve months.
Desiccant bag in the inverter cabinet
The desiccant bag in the inverter cabinet protects the electronic components from moisture. The desiccant bag must
be replaced by a new desiccant bag one day before commissioning.

6 Preparation for Installation SMA Solar Technology AG
20 SCCPXT-IA-D7-en-42 Installation Manual
6 Preparation for Installation
6.1 Selecting a Mounting Location
6.1.1 Requirements for the Mounting Location
☐ If the Sunny Central is to be installed in an electrical equipment room, an adequate supply of fresh air must be
ensured. If this is not the case, an additional ventilation system must be installed, e.g. an external fan.
☐ The mounting location must be freely accessible at all times.
☐ The mounting location must be below the maximum installation altitude (see Section17 "Technical Data", page76).
☐ The ambient temperature must be within the operating temperature range (see Section17 "Technical Data",
page76).
☐ The mounting location must fulfill the requirements for the ambient conditions (see Technical Information "Installation
Requirements - Important information on transportation and installation for Sunny Central 500CP XT ⁄ 630CP XT ⁄
720CP XT ⁄ 760CP XT ⁄ 800CP XT ⁄ 850CP XT ⁄ 900CP XT").
6.1.2 Dimensions of a Sunny Central
Dimensions of a Sunny Central for Outdoor Installation
Figure5: Dimensions with roof