SMA BOX L User Manual
Switching device for Sunny Backup systems
AUTOMATIC SWITCH BOX L
Installation Guide
AS-BoxL-IEN084410 | 98-2009210 | Version 1.0
EN
SMA Solar Technology AG Table of Contents
Table of Contents
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Identifying the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Mounting the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Mounting the Product on a Wall . . . . . . . . . . . . . . . . . . . . . . . 13
5 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Overview of the Connection Area . . . . . . . . . . . . . . . . . . . . . . 16
5.1.1 Interior view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.2 Exterior view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Connecting the Consumer Loads . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.1 Sizing the lead fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.2 Connecting Consumer Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Connecting the PV System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 Connecting the Feed-in Meter. . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5 Connecting the Consumption Meter . . . . . . . . . . . . . . . . . . . . . 27
5.6 Connecting the Sunny Backup . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.7 Connecting an External Signal . . . . . . . . . . . . . . . . . . . . . . . . . 32
Installation Guide AS-BoxL-IEN084410 3
Table of Contents SMA Solar Technology AG
5.8 Generator connection (optional) . . . . . . . . . . . . . . . . . . . . . . . 34
5.8.1 Sizing the lead fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.8.2 Connecting a generator (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.9 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.9.1 Guiding cables into the Automatic Switch Box . . . . . . . . . . . . . . . . . . . . . . . 36
5.9.2 Connecting the control and sensor cables . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.9.3 Connecting the communication cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6 Commissioning the Product. . . . . . . . . . . . . . . . . . . . . . . . 40
7 Opening and Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1 Opening the Product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.2 Closing the Product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.1 Disassembling the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.2 Storing the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.3 Disposing of the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4 AS-BoxL-IEN084410 Installation Guide
SMA Solar Technology AG Notes on this Manual
1 Notes on this Manual
This manual describes the assembly and installation of the Automatic Switch Box. This manual
replaces the assembly and installation instructions in the technical description of the
Sunny Backup 5000, version 2.0.
Store this manual where it will be accessible at all times.
1.1 Validity
This manual is valid for the type AS-BOX-L Automatic Switch Box.
1.2 Target Group
This manual is for qualified personnel. The tasks described in this manual may only be performed by
qualified personnel.
1.3 Additional Information
Additional information regarding the Sunny Backup system and the Automatic Switch Box can be
found in the FAQ section at www.SMA.de/en.
Additional Sunny Backup system certificates can be found on the Internet at www.SMA.de/en.
Installation Guide AS-BoxL-IEN084410 5
Notes on this Manual SMA Solar Technology AG
1.4 Symbols Used
The following types of safety precaution and general information are used in this manual:
DANGER!
DANGER indicates a hazardous situation which, if not avoided, will result in certain death
or serious injury.
WARNING!
WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION!
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury!
NOTICE!
NOTICE indicates a situation that can result in property damage if not avoided.
Information
Information provides tips that are valuable for the optimal installation and operation of
your product.
6 AS-BoxL-IEN084410 Installation Guide
SMA Solar Technology AG Safety
2 Safety
2.1 Appropriate Usage
The Automatic Switch Box is a changeover facility for Sunny Backup systems. Sunny Backup regulates
and controls the Automatic Switch Box and acts as an island grid in case of a power outage. During
a power outage, the Automatic Switch Box safely separates the connected PV system and the
connected consumer loads from the public grid and connects them to the island grid.
You have the option of integrating a generator into the Sunny Backup system if you selected the
"Generator connection" feature when you ordered the Automatic Switch Box. The generator
connection can be ordered as an option but cannot be retrofitted.
If a generator is integrated into the Sunny Backup system, the Automatic Switch Box switches it to the
island grid in case of a power outage.
Connection requirements
The Sunny Backup system is only certified for TN grids and may not be installed in TT grids.
The Automatic Switch Box may only be operated in conjunction with three Sunny Backups. In this
case, one of the three Sunny Backups is configured as the maste r and the other two as slaves. Consult
the Sunny Backup 5000 manual for more details. The Sunny Backup master evaluates the data
recorded in the Automatic Switch Box, coordinates all switching operations and controls all
components of the Sunny Backup system.
Do not exceed the maximum connection power of the individual outgoing lines (e.g. maximum AC PV
power to be connected: 30 kW) in the Automatic Switch Box.
Do not use the Automatic Switch Box for purposes other than those described here. Alternative uses,
modifications, and the installation of components void the warranty claims and operation permit.
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Safety SMA Solar Technology AG
The Automatic Switch Box principle in a Sunny Backup system
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SMA Solar Technology AG Safety
2.2 Safety Instructions
DANGER!
Electric shock due to high voltages in the Automatic Switch Box when connecting
the device. Death or serious injuries.
• All work on the Automatic Switch Box must be performed by a qualified personnel.
• Work on the Automatic Switch Box should only be carried out as described in this
manual.
• Observe all specified safety precautions.
Problems while performing the described activities
If you have problems while performing any of the activities described in this manual,
contact SMA Solar Technology (see chapter 10 "Contact" (page45)).
Installation Guide AS-BoxL-IEN084410 9
Unpacking SMA Solar Technology AG
3 Unpacking
3.1 Scope of Delivery
Check the delivery for completeness. Check the packaging and the Automatic Switch Box for
externally visible damage. Contact your supplier in case of damage to the packaging. Contact your
dealer if you find any damage to the Automatic Switch Box or if there are parts missing.
Object Quantity Description
A1Automatic Switch Box
B 1 Switch cabinet key
C 1 Communication cable (black)
D 3 Control and sensor cable (red)
E 1 Installation Guide
F 3 Fuse (63 A)
G 1 Sticker (hazard warning for consumer load system)
H 8 4 sealing washers and 4 washers (diameter: 6 mm)
I 8 4 sealing washers and 4 washers (diameter: 8 mm)
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SMA Solar Technology AG Unpacking
Optional packing list
The optional packing list is included in the delivery for the "Generator connection" ordering option.
Object Quantity Description
A 3 Fuse (35 A)
B 3 Headed sleeve (for 35 A fuse)
3.2 Identifying the Product
Identify the Automatic Switch Box by the serial number and the device type (type/model) on the type
label. The type label is on the right side of the enclosure.
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Mounting the Device SMA Solar Technology AG
4 Mounting the Device
4.1 Selecting the Mounting Location
DANGER!
Risk of explosion or fire during the installation of the Automatic Switch Box in
non-permissible areas. Death or serious burns.
Despite careful engineering, electrical devices can cause fires.
• Do not mount the Automatic Switch Box on flammable construction materials.
• Do not mount the Automatic Switch Box near highly flammable materials.
• Do not mount the Automatic Switch Box in potentially explosive areas.
• The mounting location and method must be suitable for the weight (approx. 41 kg) and
dimensions.
• Mount on a solid surface.
• The mounting location must be accessible at all times.
• The ambient temperature must be between –25 °C and +50 °C.
•Mount vertically.
• Never mount the device with a forward or backward tilt.
• Do not mount in a horizontal position.
• The connection area may not point upwards.
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SMA Solar Technology AG Mounting the Device
4.2 Mounting the Product on a Wall
CAUTION!
Risk of injury from falling Automatic Switch Box during transport. Physical injury
(fractures or crushing) and/or damage to the Automatic Switch Box.
• Take the Automatic Switch Box's weight (approx. 41 kg) into account.
1. Mark the position of the drill holes.
2. Drill the holes (recommended diameter: 6 mm) at the marked position.
3. Open the Automatic Switch Box with the enclosed switch cabinet key.
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Mounting the Device SMA Solar Technology AG
ATTENTION!
Intrusion of dust and moisture due to a faulty seal. Destruction of the Automatic
Switch Box.
• Observe the following order for mounting:
– Apply sealing ring (C).
– Apply washer (B).
– Fix the sealing ring and the washer
with a suitable screw (A).
4. Attach the Automatic Switch Box to the wall using
suitable screws, washers, and sealing rings.
5. Check that the unit is securely in place.
☑ The Automatic Switch Box is now mounted
securely on the wall.
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SMA Solar Technology AG Electrical Connection
5 Electrical Connection
ATTENTION!
Damage to the cables from over-bending or excessive loading. Destruction of the
Automatic Switch Box.
• Note the bending radii of the cables used.
• Trap cables accordingly (e.g. using a cable anchoring rail).
ATTENTION!
Touching the components inside the Automatic Switch Box can result in electric
discharge. Irreparable damage.
• Ground yourself before touching a component.
Spring-type terminals
Connect cables to a spring-type terminal as
shown in the graphic.
Installation Guide AS-BoxL-IEN084410 15
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