—

C ATA LO G

String combiners for solar

photovoltaic systems
2 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S
 3

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Summary

004 – 005 String combiners

006 – 009 A complete set of information,

a touch away from your fingers

010 – 015 Exemples of photovoltaic

applications

016 – 017 Features and benefits

018 – 020 String combiner 1000V DC

021 – 022 String combiner 1500V DC

023  Overall dimensions

024 – 030 Connection examples

031 – 052 Products
4 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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String combiners
Unmatched protection and control

In a photovoltaic system the modules are arranged in strings and fields

depending on the type of inverter used, the total power and the technical
characteristics of the modules. The connection of modules in series is
made on the modules themselves, while the parallel connection of the
strings is made inside string boxes that accommodate, along with the
interconnection systems, also the overcurrent protection devices,
disconnectors and surge protection devices.
The string boxes form subsystems that can be standardized according to
the number of strings, voltage and rated current. ABB offers different
product ranges, each dedicated to specific installation conditions with
typical configurations.

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01 02
 5

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01 02 03
String boxes Multi-output string boxes String boxes for monitoring

The installation of a photovoltaic The development and the increasingly The string monitoring is an important
system often occurs in complex frequent adoption of multi-string function in running medium and large
logistic situations, critical from the inverters has made it necessary to size installations, since it allows to
environmental and time perspective. reduce the costs and the space improve the manufacturability and
The availability of tested and certified occupied by the string boxes, to bring maintenance of the system. ABB offers
pre-assembled components allows the together in a single switchboard the a series of pre-wired string boxes for
installer to avoid unnecessary on site protective devices and disconnectors all installation conditions: they are
assembly, wiring and certification of multiple strings intended to be equipped both with devices necessary
activities for the string boxes. String connected to a specific inverter input. for string protection, surge protection
boxes enclose functions such as string Multi-string inverters resolve in an easy and disconnection, and with useful
protection, protection against and cost-effective way system devices for string monitoring.
overvoltage and disconnect, with conditions characterized by modules
components suitable for the string’s installed in different leaning and
various voltage levels and the number exposure positions or minimize the
of connected strings. problems related to systematic
shading of parts of the system.

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03
6 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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A complete set of information,
a touch away from your fingers
Value added services in combination with products and solutions make
ABB offer unique. ABB also provides a wide range of documents and
information intended for the renewable energy industry. With services
like publications, catalogs, websites, blogs and video tutorials, in digital
or printed versions, you can always find a tailor made solution for your
requirement and for your applications.

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Catalog BIM (Building information Modeling)
Solutions for solar energy. Low- and Objects for String Combiners.
medium- voltage components and systems.

—
C ATA LOG

Solutions for solar energy

Low- and medium-voltage
components and systems

A valuable technical resource accompanying the ABB BIM Objects for String Combiners are just
designer during the engineering stage for one click away. You can find them stored in our
implementation of a photovoltaic installation, ABB Download Center, together with the whole
from initial specifications to commissioning. product documentation.
This publication describes in depth the aspects BIM is a collaborative design process that by
concerning not only the basic architectures, but means of software allows to integrate into one
also the specific components required for single model all the useful information concerning
engineering, inspection and management of a the whole project design.
photovoltaic system, both on the DC and AC
sides. In addition to schematics and detailed
circuit diagrams, the catalog illustrates the
complete offer for photovoltaic
 7

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Video Video tutorials
String combiner boxes. Garage Nuggets.

GEMINI Multipurpose
challenges the sun. outdoor enclosures.

A video that shows how string combiner boxes These video tutorials provide the user with a clear
are the best plug&play solution for photovoltaic and direct approach to the applications of the
systems, ensuring top protection through high solar energy industry, taking advantage of a large
quality components, maximum flexibility thanks impact audiovisual communication.
to a wide range of models and sizes, and fast Information on installations, products and
installation with ready-to-use configurations. regulations are offered in a graphically attractive
appearance for a quick learning. In Garage
Nugget No. 5 and 6 “Multipurpose outdoor
enclosures” and “Gemini challenges the sun” the
narrating voice describes the ABB product
portfolio for photovoltaic market. Specifically,
the videos provide a detailed description of
Gemini enclosure features, manufactured with
techniques and materials conceived to withstand
the environmental conditions and safety of
photovoltaic systems, both outdoor and indoor.
8 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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A complete set of information,
a touch away from your fingers
A website gathering all of the digital resources related to low-voltage
products for photovoltaic applications. Product specifications,
Application Notes, regulatory studies, case studies, social network
groups, newsletters… a contribution towards the culture of renewable
energies, capitalizing not only the know-how of the experts of our
group, but also the expertise of installers and designers who use ABB
products worldwide.

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Website Blog
Low-voltage products Conversations.
for solar power.

An online resource providing the opportunity to Join the conversation on the current changes in
navigate through the wide portfolio of products, trends and technologies. In this tagged blog you
system and low-voltage solutions by ABB. can subscribe the channel dedicated to renewable
A valuable tool for an in-depth analysis of the energies or any thematic channel to ask
aspects related to the value of photovoltaic chain, questions, share your opinions with other users
with dedicated contents concerning creation, of the community and download documentation
transmission and distribution of energy in both concerning solar and wind-power applications.
on-grid and off-grid applications.
 9

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Website Website
Solar power solutions. Solar inverters.

ABB provides the widest portfolio of products, A link dedicated to the widest and most complete
solutions and services available in the portfolio of photovoltaic inverters in the industry.
photovoltaic industry. The “Solar power From the small string inverters in single-phase to
solutions” website is a portal which provides three-phase inverters and up to the multi
access to every information resources of the ABB megawatt for centralized installations.
group, giving the opportunity to navigate among Product specifications, informational resources,
case histories, references of projects, catalogs, but also the ABB technical and the sales support
news, service proposals and much more. services are just a click away.

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Website Website
Medium-voltage products. Turnkey stations.

A portal dedicated to medium-voltage In an increasingly dynamic and challenging

photovoltaic applications, specifically to systems context, ABB “turnkey” solutions allow the users
related to networks and micro-networks. to implement plug-and-play photovoltaic
The medium-voltage product range for solar stations, already equipped with all of the active
applications includes a complete range of and passive components required for one-click
switchgear solutions, energy storage modules, commissioning.
compact secondary substations, outdoor This website is specifically dedicated to low
apparatus and components and indoor air- voltage cabinets, components and inverters for
insulated load break switches, specifically indoor and outdoor applications in the range
designed to meet the most stringent between 440 kW and 3.1 MW.
specifications of medium-voltage photovoltaic
applications.
10 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Examples of photovoltaic applications
Residential system ≤ 20 kW LV

Id

1 1 4 5 6

Low-voltage products:

1. Connectors: MC4-EVO2 PV 5. Switch-disconnectors: OTDC, S800 PV-SD

2. PV Vault rapid shutdown 6. Residual current devices: F202B, F204B
3. String boxes 7. Energy meters: EQmeters and current transformers
Switchboards: Gemini 8. Contactors: AF Series
Consumer units: Europa Grid-feeding monitoring relays: CM-UFD.Mxx
Circuit breakers: S200 M UC Z, S800 PV-SP Power supplies: CP-x
Fuse disconnectors: E 90 PV 9. Fuse disconnectors: E 90
Fuses: E 9F PV 10. Surge protective devices: OVR T1 / T1-T2 / T2 QS
Spring and screw terminal blocks: SNK PI 11. Residual current circuit breakers: DS202C
4. Surge protection devices: OVR PV QS

1 2 3 4 5 6
 11

kWh Id kWh

ID

Energy meter at
connection point

7 8 9 10 11

UTF-certified
measurement group
for produced energy

7 7 8 8 9 10 11
12 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Examples of photovoltaic applications
Commercial system 20 - 1000 kW LV/MV

1 3 4 5

11 12 14
9

10 7 13

6 7

Low-voltage products:

1. Connectors: MC4-EVO2 PV 10. Miniature circuit breakers: S200 M UC Z, S800 PV-SP

2. String combiners 1000 VDC 11. Switch-disconnectors: Tmax PV, OTDC series
Switchboards: Gemini; Consumer units: Europa, Gemini 12. Contactors: GAF Series + IOR Series rail contactor
3. Fuse disconnectors: E 90 PV; Fuses: E 9F PV 13. Insulation monitoring devices: CM-IWx
4. Distribution blocks: DBL 14. GFDI Application: S804U-PVS5
5. Switch-disconnectors: OTDC; S800 PV-SD 15. Residual current devices: F202B, F204B
6. Current measurement system: CMS; Power supplies: CP-x 16. Residual current blocks: DDA 200 B
7. Surge protection devices: OVR PV QS Residual current circuit breakers: F200 type B
8. String monitoring controller Miniature circuit breakers: S 200
9. Recombiner Moulded case circuit breakers: Tmax XT, Tmax T

1 2 3 4 5 6 7 10
 13

7 10 15 16 17 18 Carichi 16

Id kWh Id kWh

ID

19 20 23 24
22

kWh

kWh
ID+GPD

Carichi 25 21

Medium-voltage products:

17. Contactors: AF Contactor Series 22. Modular Systems: Compact Secondary Substation,
Grid-feeding monitoring relays: CM-UFD.Mxx Secondary Skid Unit, Secondary Enclosed Unit
Power supplies: CP-x 23. Transformers: Dry-type transformers,
18. Energy meters: EQ meters and current transformers oil-immersed transformers
19. Surge protective devices: OVR T1 / T1-T2 / T2 QS 24. Gas-insulated secondary switchgear: SafeRing / Safeplus
20. Fuse disconnector: E 90 Air-insulated secondary switchgear: UniSec
21. GSM telephone actuator: ATT Air-insulated switch-disconnector: NALF
Recloser: Gridshield®
Circuit breaker: VD4
25. Interface protection system: ABB Relion® Family

10 11 16 16 17 17 21
14 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Examples of photovoltaic applications
Sistemi utility scale > 1000 kW MT/AT

2 3 4
5

14 15 4

20
6
12

13 11
6
1 7

Low-voltage products:

1. Connectors: MC4-EVO2 PV
9
2. Fuse disconnectors: E 90 PV; Fuses: E 9F PV
3. Distribution blocks: DBL
4. Switch-disconnectors: OTDC
5. String combiners: 1000V DC/1500V DC
Switchboards: Gemini
10 6. Surge Protection Devices: OVR PV QS
7. Current measurement system: CMS
8. String Monitoring Controller
9. Recombiner
10. Current and voltage sensors: ES-VS Series
11. Moulded Case Circuit Breakers: Tmax PV
12. Switchboards: System pro E power
11 6 4 13. Insulation monitoring devices: CM-IWx
14. Contactors: GAF Series, IOR Series rail contactors
15. GFDI Application: S804U-PVS5
16. Fuse disconnectors: E 90
17. Surge protection devices: OVR T1 / T1-T2 / T2 QS

1 2 3 4 5 6 7
 15

To next
inverter

18 19 22 26 26

25
24

Id

kWh

kWh
ID+GPD

17 16 21 23

ID+GPD
18. Contactors: AF Series
19. Moulded case circuit breakers:
Tmax XT, Tmax T 23
Air circuit breakers: Emax 2

Medium-voltage products:

20. Megawatt station 24. Modular Systems: Compact Secondary Substation,

21. Transformers: Dry-type transformers, Secondary Skid Unit, Secondary Enclosed Unit
oil-immersed transformers 25. eHouse, skid-mounted substation
22. Gas-insulated secondary switchgear: SafeRing / Safeplus 26. Gas-insulated switchgear: ZX product family
Air-insulated secondary switchgear: UniSec Air-insulated primary switchgear: UniGear product family,
Air-insulated switch-disconnector: NALF UniGear Digital
Recloser: Gridshield Air-insulated secondary switchgear: UniSec
Circuit breaker: VD4 Outdoor breakers: R-MAG® (dead tank), OVB-VBF (life tank)
23. Interface protection system: ABB Relion® Family, REG615 Recloser: Gridshield

10 11 12 13 14 19
16 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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String combiner
Features and benefits

— — —
Complete range to address the requirements in To meet the demands of extreme Thermoplastic manufactured with co-injection
residential, commercial and utility scale projects climatic conditions up to 50 °C. technique ensuring highest sturdiness but very lite
in 1000V DC and 1500V DC applications. in total weight as compared to metal enclosures.
 17

Design, production, quality and service

An essential factor in determining the success of a • ABB combiners host ABB components specifically made
photovoltaic system is the accurate selection of its for photovoltaic applications, making it easy during
components, with particular attention to connections, and maintenance to rely on one single producer and supplier,
protections from the modules to the inverters. from components to the whole system.
As the photovoltaic system has to perform for more than 20 • Capacity to deliver all over the world at your site.
years in harsh environments, the products used should be • Comprehensive documentation for easy assembly at
considered of high quality and as a good investment for long site.
lasting performance. • Service and support through ABB local sales
The string combiners are particularly important as they are organization worldwide.
usually installed under the photovoltaic panels and therefore
exposed to the most harsh environment.

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IP66 enclosures for extreme outdoor Components selected for protection
conditions resistant to atmospheric are based on best in class
conditions and dusty environments. photovoltaic products
(OTDC Disconnectors, OVR PV SPDs,
E 90 PV Fuse Holders, Gemini
thermoplastic outdoor enclosures).

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IP20 protection of components inside
— the combiner - No live parts are
Thermoplastic material, 100% accessible directly inside the
recylable make it environmentally combiners ensuring safety of the
friendly. installers.

—
Efficient design enabling to have
configurations from 1 to 32 strings in a
single enclosure, making it easy for
logistics and installation at site.

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Development and assembly process in 100% quality Inspection before dispatch, String combiner box with monitoring options.
accordance to the latest IEC Standards. ensuring highest level of reliability. Available with monitoring of current, voltage,
temperature and status of disconnectors
and/or surge protection devices. Communication
over RS485 ensuring easy integration with
the plant / inverter monitoring systems.
18 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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String combiner 1000V DC
Technical features

String combiner type 1 st. 2 st. 3 st. 4 st. 6 st. 8 st. 10 st. 12 st. 14 st. 16 st. 18 st. 20 st. 24 st. 28 st. 32 st.
General Data
Maximum Voltage 1000V DC
No of DC Input (+ & -, optional) 1 2 3 4 6 8 10 12 14 16 18 20 24 28 32
SPD protection Type 2 Pluggable
String protection No Per each incoming string
Monitoring No Optional
Current, temperature and SPD signal as standard.
Monitoring Parameters No Optional to include Voltage and Disconnector signal
Communication Protocol No Modbus RS485
Enclosure Type
Model Europa Gemini
Material Type Thermoplastic
Door Type/ Opening Transparent, Hinged Door Opaque, Hinged Door openable 180 Deg
Lock Type Click on push to lock Doors supplied with 2 standard double bit locks (3 for sizes 5 and 6)
Number of incoming strings From 1 to 4 From 6 to 32
Rated Service Voltage 1000V DC
Degree of resistance to impacts IK 10
Degree of protection IP65 IP66
Recyclable 100%
Environmental data
Operating Temperature °C -20°C upto +50°C
Storage temperature °C -20°C upto +60°C
Resistance to Abnormal heat and fire upto 750°C
Height above Sea level Up to 2000m
Humidity up to 95%
DC Input
Input Cable entry M16 Cable Gland, 2,5 - 16 mm²
Input Connection Terminals Directly on the Fuse Holder
Fuse Type Cylindrical 10x38 gPV
No fuse
Fuse Size 15A
DC Output
Output Cable gland +/- M16 M16 M16 M16 M25 M25 M25 M32 M32 M32 M32 M40 M40 M40 M40
Clamping cable diameter (m²) 2,5-16 25-50 70-120 150-240
Conductor material Cupper/Alluminium
Terminal Type Pipe terminal Ring Terminal
Voltage DC 1000V DC
Maximun current output 10A 20A 30A 40A 60A 80A 100A 120A 140A 160A 180A 200A 240A 280A 320A
 19

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String combiner 1000V DC
Order codes

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1000V DC without monitoring (No fuses) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
1 EUROPA65 12M 275x242x140 String box DC 1 str 1000V (no fuse) 1SLM300100A0790
2 EUROPA65 12M 275x242x140 String box DC 2 str 1000V (no fuses) 1SLM300200A0790

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1000V DC without monitoring (2 fuses + - ) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
3 EUROPA65 18M 380x242x140 Stringbox DC 3str 1000V 2F 15A 1SLM300300A0740
4 EUROPA65 36M2F 380x392x140 Stringbox DC 4str 1000V 2F 15A 1SLM300400A0740
6 Gemini 2 460x583x260 Stringbox DC 6str 1000V 2F 15A 1SLM300600A0740
8 Gemini 2 460x583x260 Stringbox DC 8str 1000V 2F 15A 1SLM300800A0740
10 Gemini 2 460x583x260 Stringbox DC 10str 1000V 2F 15A 1SLM301000A0740
12 Gemini 3 460x742x260 Stringbox DC 12str 1000V 2F 15A 1SLM301200A0740
14 Gemini 3 460x742x260 Stringbox DC 14str 1000V 2F 15A 1SLM301400A0740
16 Gemini 4 590x742x260 Stringbox DC 16str 1000V 2F 15A 1SLM301600A0740
18 Gemini 4 590x742x260 Stringbox DC 18str 1000V 2F 15A 1SLM301800A0740
20 Gemini 4 590x753x260 Stringbox DC 20str 1000V 2F 15A 1SLM302000A0740
24 Gemini 6 840x1058x360 Stringbox DC 24str 1000V 2F 15A 1SLM302400A0740
28 Gemini 6 840x1058x360 Stringbox DC 28str 1000V 2F 15A 1SLM302800A0740
32 Gemini 6 840x1058x360 Stringbox DC 32str 1000V 2F 15A 1SLM303200A0740

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1000V DC with monitoring (2 fuses + - ) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
12 Gemini 4 590x742x260 Stringbox DC 12str Monitor 1000V 2F 15A 1SLM301200A3740
14 Gemini 4 590x742x260 Stringbox DC 14str Monitor 1000V 2F 15A 1SLM301400A3740
16 Gemini 4 590x742x260 Stringbox DC 16str Monitor 1000V 2F 15A 1SLM301600A3740
18 Gemini 6 840x1047x360 Stringbox DC 18str Monitor 1000V 2F 15A 1SLM301800A3740
20 Gemini 6 840x1058x360 Stringbox DC 20str Monitor 1000V 2F 15A 1SLM302000A3740
24 Gemini 6 840x1058x360 Stringbox DC 24str Monitor 1000V 2F 15A 1SLM302400A3740
28 Gemini 6 840x1058x360 Stringbox DC 28str Monitor 1000V 2F 15A 1SLM302800A3740
32 Gemini 6 840x1058x360 Stringbox DC 32str Monitor 1000V 2F 15A 1SLM303200A3740
20 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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String combiner 1000V DC
Order codes

—
1000V DC without monitoring (1 fuse + ) for grounded earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
3 EUROPA65 18M 380x242x140 M16 Stringbox DC 3str 1000V 1F 15A 1SLM300300A4740
4 EUROPA65 36MF2 380x392x140 M16 Stringbox DC 4str 1000V 1F 15A 1SLM300400A4740
6 Gemini 2 460x583x260 M25 Stringbox DC 6str 1000V 1F 15A 1SLM300600A4740
8 Gemini 2 460x583x260 M25 Stringbox DC 8str 1000V 1F 15A 1SLM300800A4740
10 Gemini 2 460x583x260 M25 Stringbox DC 10str 1000V 1F 15A 1SLM301000A4740
12 Gemini 3 460x742x260 M32 Stringbox DC 12str 1000V 1F 15A 1SLM301200A4740
14 Gemini 3 460x742x260 M32 Stringbox DC 14str 1000V 1F 15A 1SLM301400A4740
16 Gemini 3 460x742x260 M32 Stringbox DC 16str 1000V 1F 15A 1SLM301600A4740
18 Gemini 3 460x742x260 M32 Stringbox DC 18str 1000V 1F 15A 1SLM301800A4740
20 Gemini 3 460x753x260 M40 Stringbox DC 20str 1000V 1F 15A 1SLM302000A4740
24 Gemini 4 590x753x260 M40 Stringbox DC 24str 1000V 1F 15A 1SLM302400A4740
28 Gemini 6 840x1058x360 M40 Stringbox DC 28str 1000V 1F 15A 1SLM302800A4740
32 Gemini 6 840x1058x360 M40 Stringbox DC 32str 1000V 1F 15A 1SLM303200A4740

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1000V DC with monitoring (1 fuse + ) for grounded earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
12 Gemini 4 590x742x260 M32 Stringbox DC 12str Monitor 1000V 1F 15A 1SLM301200A5740
14 Gemini 4 590x742x260 M32 Stringbox DC 14str Monitor 1000V 1F 15A 1SLM301400A5740
16 Gemini 4 590x742x260 M32 Stringbox DC 16str Monitor 1000V 1F 15A 1SLM301600A5740
18 Gemini 4 840x1047x360 M32 Stringbox DC 18str Monitor 1000V 1F 15A 1SLM301800A5740
20 Gemini 6 840x1058x360 M40 Stringbox DC 20str Monitor 1000V 1F 15A 1SLM302000A5740
24 Gemini 6 840x1058x360 M40 Stringbox DC 24str Monitor 1000V 1F 15A 1SLM302400A5740
28 Gemini 6 840x1058x360 M40 Stringbox DC 28str Monitor 1000V 1F 15A 1SLM302800A5740
32 Gemini 6 840x1058x360 M40 Stringbox DC 32str Monitor 1000V 1F 15A 1SLM303200A5740

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1000V DC multioutput without monitoring (2 fuses + - ) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order code
Stringbox Multi output 2 IN-2 OUT 1000Vdc
2 EUROPA65 36MF2 380x392x140 2 Fuses 15A 1SLM300200A1740
Stringbox Multi output 4 IN-2 OUT 1000Vdc
4 EUROPA65 36MF2 380x392x140 2 Fuses 15A 1SLM300400A1740
Stringbox Multi output 6 IN-2 OUT 1000Vdc
6 EUROPA65 36MF2 424x392x140 2 Fuses 15A 1SLM300600A1740
 21

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String combiner 1500V DC
Technical features

String combiner type 16 st. 18 st. 20 st. 24 st. 28 st. 32 st.

General Data
Maximum Voltage (VDC) 1500
No of DC Input 16 18 20 24 28 32
DC input for + & - Optional available -
SPD protection Type 2 Pluggable
Monitoring Optional -
Current, temperature and SPD signal as standard. Optional to include Voltage and
Monitoring Parameters Disconnector signal -
Communication Protocol Modbus RS485 -
Enclosure Type
Model Gemini
Material Type Thermoplastic
Door Type/ Opening Opaque, Hinged Door openable 180 Deg
Lock Type Doors supplied with 2 standard double bit locks (3 for sizes 5 and 6)
Number of incoming strings From 6 to 32
Rated Service Voltage 1500V DC
Degree of resistance to impacts IK10
Degree of protection IP66
Recylable 100%
Environmental data
Operating Temperature °C -20°C upto +50°C
Storage temperature °C -20°C upto +60°C
Resistance to Abnormal heat and fire upto 750°C
Height above Sea level Up to 2000m
Humidity up to 95%
DC Input
Input Cable entry M16 Cable Gland, 2,5 - 16 mm²
Input Connection Directly on the Fuse Holder
Fuse Type Cylindrical 10x85 gPV
Fuse Size (A) 15
DC Output
Output Cable gland M32 M32 M40 M40 M40 M40
Clamping area 70-120 150-240
Conductor material Cupper/Alluminium
Terminal Type Ring Terminal
Voltage DC 1500
Maximum Current Output (A) 160A 180A 200A 240A 280A 320A
22 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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String combiner 1500V DC
Order codes

—
1500V DC without monitoring (2 fuses + - ) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order codes
16 Gemini 5 590x897x360 Stringbox DC 16str 1500V 2F 15A 1SLM301600A0940
18 Gemini 5 590x897x360 Stringbox DC 18str 1500V 2F 15A 1SLM301800A0940
20 Gemini 6 840x1058x360 Stringbox DC 20str 1500V 2F 15A 1SLM302000A0940
24 Gemini 6 840x1058x360 Stringbox DC 24str 1500V 2F 15A 1SLM302400A0940
28 Gemini 6 840x1058x360 Stringbox DC 28str 1500V 2F 15A 1SLM302800A0940

—
1500V DC with monitoring (2 fuses + - ) for ungrounded or floating earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order codes
16 Gemini 6 840x1047x360 Stringbox DC 16str Monitor 1500V 2F 15A 1SLM301600A3940
18 Gemini 6 840x1047x360 Stringbox DC 18str Monitor 1500V 2F 15A 1SLM301800A3940
20 Gemini 6 840x1058x360 Stringbox DC 20str Monitor 1500V 2F 15A 1SLM302000A3940
24 Gemini 6 840x1058x360 Stringbox DC 24str Monitor 1500V 2F 15A 1SLM302400A3940
28 Gemini 6 840x1058x360 Stringbox DC 28str Monitor 1500V 2F 15A 1SLM302800A3940

—
1500V DC without monitoring (1 fuse + ) for grounded earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order codes
16 Gemini 6 840x1047x360 Stringbox DC 16str 1500V 1F 15A 1SLM301600A4940
18 Gemini 6 840x1047x360 Stringbox DC 18str 1500V 1F 15A 1SLM301800A4940
20 Gemini 6 840x1058x360 Stringbox DC 20str 1500V 1F 15A 1SLM302000A4940
24 Gemini 6 840x1058x360 Stringbox DC 24str 1500V 1F 15A 1SLM302400A4940
28 Gemini 6 840x1058x360 Stringbox DC 28str 1500V 1F 15A 1SLM302800A4940
32 Gemini 6 840x1058x360 Stringbox DC 32str 1500V 1F 15A 1SLM303200A4940

—
1500V DC with monitoring (1 fuse + ) for grounded earthing systems

Strings External dimension, including

incoming Enclosure Size cable glands WxHxD (mm) Description Order codes
16 Gemini 6 840x1047x360 Stringbox DC 16str Monitor 1500V 1F 15A 1SLM301600A5940
18 Gemini 6 840x1047x360 Stringbox DC 18str Monitor 1500V 1F 15A 1SLM301800A5940
20 Gemini 6 840x1058x360 Stringbox DC 20str Monitor 1500V 1F 15A 1SLM302000A5940
24 Gemini 6 840x1058x360 Stringbox DC 24str Monitor 1500V 1F 15A 1SLM302400A5940
28 Gemini 6 840x1058x360 Stringbox DC 28str Monitor 1500V 1F 15A 1SLM302800A5940
 23

—
Overall dimensions

Dimensions (mm)
Combiner with W H Cable gland H with cable gland D
EUROPA65 12M 275 220 M16 248 140
EUROPA65 18M 380 220 M16 248 140
EUROPA65 36M2F 380 370 M16 398 140
460 550 M25 583 260
Gemini 2 460 550 M32 592 260
460 700 M25 733 260
Gemini 3 460 700 M32 742 260
590 700 M32 742 260
Gemini 4 590 700 M40 753 260
590 855 M32 897 360
Gemini 5 590 855 M40 908 360
840 1005 M32 1047 360
Gemini 6 840 1005 M40 1058 360

D
W
 24 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Connection examples
Single output

—
2 strings, 1000V DC without monitoring

1 Fuse holder
5 3 2 3 2 Terminal block M15 PE
55 33 6 22 33
66 3 Terminal block M16 BLU
4 Terminal block M16 GREY
ringhe
ringhe 5 Stop BAM3
ringhe 6 Surge protection OVR QS
7 Jumper bar
7 5
77 55 8 Switch disconnector OTDC 32 F3
4 8 4
44 88 44

—
8 strings, 1000V DC without monitoring

4 1 Fuse holder
44 3 5
33 55 2 Terminal block M35 PE
3 Surge protection OVR QS
4 Stop BAM3
7 5 Shroud for OTDC
77 6
66 6 Switch disconnector OTDC250E11K
7 Distribution block DBL160
1
ringhe
ringhe 11
ringhe
1
11
2
22

—
16 strings, 1000V DC without monitoring

1 Fuse holder
6 2 Stop BAM3
66 3 Surge protection OVR
4 Terminal block M35 PE
5 Switch disconnector OTDC250E11K
2 5 6 Shroud for OTDC
22 3 55
33

4
44
1
11

1
11
 25

—
24 strings 1000V DC, without monitoring

7
2
7
2
3 4 6

3 4 6

1 5

1 5

1 Fuse holder
2 Distribution block DBL160
3 Stop BAM3
4 Surge protection OVR
5 Terminal block M35 PE
6 Switch disconnector OTDC400E11K
7 Shroud for OTDC

—
24 strings 1500V DC, without monitoring

2
2 2 7
2
2 2 7
3
6

3
6
4

1
5

1 3

1 3

1 Fuse holder
2 Distribution block DBL160
3 Stop BAM3
4 Surge protection OVR
5 Terminal block M35 PE
6 Switch disconnector OTDC400EV012K
7 Shroud for OTDC
26 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Connection examples
Single output

—
16 strings, 1000V DC with monitoring
4 16 8
9
1 Fuse holder
12 2 SCK-M-1500V (special accessory)
4 16 8
9 3 Terminal block M4 PE
4 Stop BAM3
5 10 5 Surge protection OVR TS
12 15
11 6 Terminal block M4 GREY
7 Switch disconnector OTDC250E11K
5 10 7
12 8 Distribution block DBL175
15
11 9 Shroud for OTDC
10 Switch E211
7 11 Power supplier CP-E 2,5 24V
12
5 12 SCK-M-I-8S-20A
13 SCK-C-MODBUS
1 2 4 14 Terminal block M35 PE
5 15 Aux contact OTDC (special accessory)
16 Erico 1ST622
1 2 4
6
1

6
1

13 3

13 3

INVERTER

INVERTER

AUX OTDC

AUX OTDC
 27

—
24 strings, 1000V DC with monitoring

1 Fuse holder
2 SCK-M-1500V (special accessory)
5 16 3 Terminal block M4 PE
9 4 Distribution block DBL160
5 Stop BAM3
12 6 Surge protection OVR TS
8 7 Terminal block M4 GREY
4
8 Switch disconnector OTDC400EV11K
5 16 15 9 Shroud for OTDC
12 9 10 Switch E211
11 Power supplier CP-E 2,5 24V
10 12 SCK-M-I-8S-20A
12
13 SCK-C-MODBUS
4 8
14 Terminal block M35 PE
12 5
15 15 Aux contact OTDC (special accessory)
6 11 16 Erico 1ST622
12
14 5 2 5
10
1

12 5
7
6 11
1
14 5 2 5
1

7
1 3 13 3

3 13 3

INVERTER

AUX OTDC
INVERTER

AUX OTDC
28 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Connection examples
Single output

—
24 strings, 1500V DC with monitoring
4 16
9 1 Fuse holder
8
2 SCK-M-1500V (special accessory)
12 4 16 3 Terminal block M4 PE
9 4 Stop BAM3
8 7
5 Surge protection OVR TS
12 15 6 Terminal block M16 GREY
12
7 Switch disconnector OTDC400EV12K
10 7
8 Distribution block DBL160
15 9 Shroud for OTDC
12
12 10 Switch E211
10 11 Power supplier CP-E 2,5 24V
5 12 SCK-M-I-8S-20A
11 2 13 SCK-C-MODBUS
12
14 Terminal block M35 PE
5 14 15 Aux contact OTDC (special accessory)
1 11 2 16 Erico 1ST622
4 6 13
14
1 4 6 13
1

1
3

INVERTER

INVERTER
INVERTER

INVERTER

AUX OTDC

AUX OTDC
 29

—
24 strings, 1000V DC without monitoring for grounded systems
5
9 9
1 Fuse holder
8 8 2 Distribution block DBL160
7 3 Stop BAM3
2 4 Surge protection OVR
3 7 5 Terminal block M35 PE
6 Switch disconnector OTDC400E11K
7 Shroud for OTDC
13 1
6
4
INVER
4 2 2 6

1 5

INVERTER

INVERTER

INVERTER INVERTER

INVERTER
 5
9 9
30 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S
8 8

3 7

— 1 1

Connection examples
4 2 2 6

Multi-output

—
4 strings, 2 out 100V DC Multi-output

1 Fuse holder
2 Terminal block M16 PE
5 3 Terminal block M16 BLU
9 9 4 Terminal block M16 GREY
5 Stop BAM3
8 8 6 Terminal block M35 BLU
7 Terminal block M35 GREY
8 OTDC
3 7
9 Surge protection OVR QS

1 1

4 2 2 6

INVERTER INVERTER

OTDC

INVERTER INVERTER
 31

—
Fuse disconnectors
E 90 PV

The E 90 PV series of fuseholders and disconnectors has been designed for 1000V
DC and 1500V DC applications. The E 90 PV series is specifically focused on
overcurrents protection of photovoltaic systems. It provides a reliable, compact
and effective solution in combination with 10,3 x 38 gPV cylindrical fuses (1000 V
DC applications) or in combination with 10 x 85 and 10/14x85 gPV cylindrical fuses
(1500 V DC applications).
The main features of E 90 PV fuseholders and disconnectors include:
• High temperature performance thanks to venting grooves and cooling cham-
bers that improve heat dissipation also for multipole configurations
• IP 20 touch proof ensuring no possibility of getting in touch with live parts du-
ring maintenance operation or fuse replacement, ensuring personnel protection
• In case of E90 PV for 1000V DC applications, safety during maintenance opera-
tions can be further ensured by the possibility to seal the handle in close posi-
tion and lock it in open position
• Faster identification of faulty strings in case of fuse holders for 1000V DC in-
stallations; thanks to the LED on the fuse holder which indicates the blown fuse.

Type E90/32 PV E90/32 PV 1500

IEC 60947-3, UL 4248-1, IEC 60269-1,-2,-6
Reference standards - UL 4248-18 UL 4248-19
Rated current [A] 30 32 (acc. IEC)/ 30 (acc. UL)
Rated operational voltage [V] 1000 V DC 1500V DC
Fuse size [mm] 10x30 10x85 and 10/14x85
Max power dissipation accepted [W] 3 6
PZ2 2-2.5 Nm PZ2 2-2.5 Nm
Tightening torque [Nm] (PZ2 18-22 lb-in) (PZ2 18-22 lb-in)
Protection degree - IP20 IP20
Cross section rigid copper
conductors (1 wire) [mm2] 1.5 - 25 (16-4 AWG)
Cross section stranded copper
conductors (1 wire) [mm2] 1.5 - 16 (16-5 AWG) 0.75 – 25 (18-4 AWG)
Cross section stranded copper
conductors (2 wires of same sect.) [mm2] 0.75 – 10 (18-6 AWG)
Cable temperature [°C] CU 60, 75, 90 max 90 (acc. UL)
Operating temperature [°C] -0,125 > -5
Storage temperature [°C] -0,357142857 > -25
Temperature stability (main body) [°C] 125
Approvals - UL, CCC, EAC UL
32 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Cylindrical fuses
E 9F PV

The E 9F PV series of cylindrical fuses has been specifically designed for

protecting direct current circuits up to 1500V.

Available in the 10.3 x 38 mm size for up to 30 A rated current values at a nominal

voltage of 1000V DC or in the 10x85 mm size up to 32 A rated current at a nominal
voltage of 1500V DC, they are the best way to protect strings, inverters and surge
arresters in photovoltaic installations.

Type E9F PV E9F PV 1500

IEC 60269-6; ROHS IEC 60269-6; ROHS
Reference standards - 2002/98/CE, UL 2002/98/CE, UL
Rated current [A] 1..30 4…32
Rated operational voltage [V] 1000 DC 1500 DC
Breaking capacity [kA] 10 50
Overall dimensions [mm] 10.3x38 10x85
 33

—
Busbars for E90 PV
Fuse disconnectors

Main technical specifications DC-Busbar 30mm2

Type 1 Phase 2 Phase
Material Copper Copper
Surface Plain Plain
Insulation ABS Grey RAL 7035
End Cap ABS Grey RAL 7035
Technical data
Heat deflection Temp. Long Term 90°C UL 94V0
Heat deflection Temp. Short term 113°C UL94V0
Comparative Tracking Index 600V
Standards EN60947-1:2007/IEC 60947-1:2007
Insulation Coordination Overvoltage Category III/ Degree of Pollution 2
Electrical Data
Max. electrical load 690V AC/1000V DC 690V AC/1000V DC
Protection Class: IP20
IPK=25kA/0.1s (Surge Energy Capacity IPK)
Short Circuit Rating ICC 100kA-NH3 355A gC500V JM
Impulse Voltage Strength ≥8.5KV
Dielectric Strength >32 kV/mm
Capacity at 35°C ambient temperature depending on the feeding point
Cross Section 30 mm2
Busbar Length max. 1000mm max. 300mm
Feeding at beginning/ending
Max Current Is/Phase 120A 200A
Other Feeding Max current Is/Phase 160A 250A

Feeding
Feeding at beginning or end of busbar Other Feedings
Sn S3 S2 S1 S1 S2 S3
Is
Sn
Is Is

Ie = Is Ie = Summe Is

In case of center-feeding, please note that

the sum of junction currents S1..Sn per rail
branch may not be bigger than the above
named max. busbar current ls/Phase.
34 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Surge protective devices
OVR PV, OVR TC

ABB offers a wide range of surge protection devices specifically designed for
photovoltaic systems. The main features of the OVR PV SPDs include:
• OVR PV T1 and T2 version
• Auto-protected from end-of-life short circuits up to 10 kA DC thanks to the
integrated thermal protection with direct current breaking capacity
• pluggable cartridges for easy maintenance, no need to disconnect the line
• auxiliary contact for remote signaling of line status (“TS” version)
• absence of short circuit follow current
• absence of risk for reversed polarity
• “Y” configuration for a safer protection
• bottom wiring to improve safety when there is humidity issues
in enclosure
• QS QuickSafe® Technology- Fast disconnection in case of end of life of the SPD
avoiding thermal runaway.

OVR PV T2 OVR PV T2 OVR PV T2 OVR PV T2

Types 40-600 P QS 40-1000 P QS 40-1000 P TWIN QS 40-1500 P QS
OVR PV T2 OVR PV T2 OVR PV T2 OVR PV T2
Types with auxiliary contact (TS) 40-600 P TS QS 40-1000 P TS QS 40-1000 P TS TWIN QS 40-1500 P TS QS
Technology Varistor + GDT Varistor Varistor Varistor
Electrical features
IEC 61643-11 / IEC 61643-11 / IEC 61643-11 / IEC 61643-11 /
EN 50539-11 / EN 50539-11 / EN 50539-11 / EN 50539-11 /
Standard UL 1449 4th edition UL 1449 4th edition UL 1449 4th edition UL 1449 4th edition
Type/test class T2/II T2/II T2/II T2/II
Protected lines 2 2 4 2
Types of networks Photovoltaic Photovoltaic Photovoltaic Photovoltaic
Type of current DC DC DC DC
Nominal voltage Un (L-N/L-L) V 600 1000 1000 1500
Max. cont. operating voltage Ucpv V 600 1100 1100 1500
Impulse current Iimp (10/350) 2 2 2 2
Maximum discharge current
Imax (8/20) kA 40 40 40 40
Nominal discharge current In (8/20) kA 20 20 20 10
Voltage protection level Up
at In (L-L/L-PE) kV 2.8/1.4 3.8/3.8 3.8/3.8 4.5/4.5
Response time ns ≤ 25 ≤ 25 ≤ 25 ≤ 25
Residual current IPE μA 10 75 75 <30
Short-circuit DC current Iscpv A 300 10,000 10,000 10,000
Disconnector Fuse no need up to 0.3 kA no need up to 10 kA no need up to 10 kA no need up to 10 kA
Circuit breaker no need up to 0.3 kA no need up to 10 kA no need up to 10 kA no need up to 10 kA
Pluggable cartridge Yes Yes Yes Yes
Integrated specific thermal
disconnector Yes Yes Yes Yes
State indicator Yes Yes Yes Yes
Safety reserve No No No No
Auxiliary contact Yes (TS option) Yes (TS option) Yes (TS option) Yes (TS option)
 35

With increasing request of monitoring systems, OVR TC data line SPDs are right
choice to protect the monitoring lines of the PV plants from surges.
They are installed in series with the network and have removable cartridges,
making maintenance simple, without having to cut the power to the
telecommunications line.

Main technical specifications OVR TC

Reference Standard IEC/EN 61643-21 - UL497B
IEC type C2
Max. cont. operating voltage Uc V 7 to 220V (AC/DC)
Nominal Discharge current In (8/20us) kA 5
Max. discharge current Imax (8/20us) kA 10
Response time ns 1
Pluggable Yes
36 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Miniature circuit-breakers
S800 PV-SP

The S800 PV-SP modular miniature circuit-breakers can be used in networks up to

1500 V DC (4-poles execution). The S800 PV-SP circuit breakers and its range of
accessories (auxiliary contacts, undervoltage releases, motorized commands) allow
for a wide spectrum of configurations.
The main features of the S800 PV-SP circuit breakers include:
- interchangeable terminals
- central trip safe disconnection of all poles
- contact status displayed for each pole
- polarity independent wiring

Main technical specifications S800 PV-SP

Reference Standards IEC EN 60947-2 and Annex P
Rated current A 5…125
Number of poles 2 ... 4
Rated voltage Ue
(DC) 2 poles* V 800 
(DC) 3 poles* V 1200
(DC) 4 poles* V 1500
Ultimate rated short-circuit breaking capacity Icu
5…16A acc. IEC 60947-2 Annex P kA 5
20…125A acc. IEC 60947-2 kA 5
20…125A acc. IEC 60947-2 Annex P kA 3
Thermomagnetic release characteristic 4 In ≤ Im ≤ 7 In
Class of use A
Operating temperature °C -25…+60 
Mounting DIN rail EN 60715 (35 mm)
by means of fast clip device
* Please refer to the wiring diagrams

Panel network in earth-insulated systems

Earthed network
800 VDC 1200 VDC

1 3 1 3 5
2 4 2 4 6

Non-earthed network
800 VDC 1500 VDC

1 3 1 3 5 7
2 4 2 4 6 8
 37

—
Switch-disconnectors
S800 PV-SD, S802 PV-M-H

The S800 PV-SD modular switch-disconnectors can be used in networks up to 1500

V DC (4-poles execution). The S800 PV-SD switch-disconnectors and its range of
accessories (auxiliary contacts, undervoltage releases, motorized commands)
allow for a wide spectrum of configurations.
The main features of the S800 PV-SD switch-disconnectors include:
• interchangeable terminals
• contact status displayed for each pole
• polarity independent wiring

Main technical specifications S800 PV-SD

Reference Standards IEC EN 60947-3 and Annex D
Earthed network Rated current In A 32, 63, 125
800 VDC 1200 VDC
Number of poles 2…4
Rated voltage Ue
1 3 1 3 5 (DC) 2 poles* V 800
(DC) 3 poles* V 1200
2 4 2 4 6
(DC) 4 poles* V 1500
Rated short-time withstand current Icw
(DC) 2 poles* 800 V kA 1.5
(DC) 3 poles* 1200 V kA 1.5
(DC) 4 poles* 1500 V kA 1.5
Non-earthed network Class of use DC-21A , DC-PV2
800 VDC 1500 VDC Operating temperature °C -25…+60
on DIN rail EN 60715 (35 mm)
1 3
Mounting by means of fast clip device
1 3 5 7
* Please refer to the wiring diagrams
2 4 2 4 6 8

The S802 PV-M-H polarized switch-disconnectors are specially designed for

networks up to 1000 V DC. They are equipped with permanent magnets which
provide the switch polarity, therefore a correct supply voltage is required. S802
PV-M-H switch-disconnectors and its range of accessories (auxiliary contacts,
undervoltage releases, motorized commands) allow for a wide spectrum of
configurations.
The main features of the S802 PV-M-H switch-disconnectors include:
• interchangeable terminals
• contact status displayed for each pole

S802 PV-M-H
Main technical specifications S802 PV-M-H
L– L+ + – Reference Standards IEC EN 60947-3
Rated current In A 32, 63, 100
Number of poles 2
1 3 1 3 Rated voltage Ue
2 4
(DC) 2 poles* V 1000
2 4
Rated short-time withstand current Icw
(DC) 2 poles* 1000 V kA 1.5
Class of use DC-21A
– + L+ L– Operating temperature °C -25…+60
on DIN rail EN 60715 (35 mm)
Comply with polarity Mounting by means of fast clip device
and supply direction in wiring. * Please refer to the wiring diagrams
38 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Switch-disconnectors
OTDC16...32

OTDC16...32 disconnect switches are available up to 32 amperes and 1000V.

The modular structure offers a simple and cost effective solution for disconnecting
up 1, 2, or 3 PV circuits within the same footprint area.

The main features of the OTDC16...32 disconnect switches include

• Patented design of DC main contacts offer:
- Low temperature rise for minimal contribution to overall heat-rise
within any enclosure.
OTDC16..32F OTDC16....32U - High operational performance, 32A up to 1000V, in high ambient
temperatures.
- Increased energy efficiency
• Compactness and modularity: allow for consistent and optimized mounting in
switchboard equipment, therefore reducing implementation costs and increased
space savings.
• DINrail, base, or door-mounted versions for simple installation in a variety of
enclosure designs.
• Compliant with many global standards, including UL 508i.
• OTDC16...32US versions are factory pre-connected for single-wire breaking
applications.
• Enclosed OTDCP16...32 versions are suitable for outdoor use in harsh
OTDCP16...32F
environments.
 39

Main technical specifications 1) OTDC16...32

_F Type _U Type
Mounting Versions Base and Din Mount OTDC_F_ OTDC_U_, OTDC_US_
Door Mount OTDC_FT_ OTDC_UT_, OTDC_UST_
Reference Standards IEC 60947-3
Rated Insulation Voltage (Ui) Pollution degree 3 V 1000
Rated Impulse Voltage (Uimp) kV 8
Nominal Current In (Amps) 16, 25, 32 16, 25, 32
Rated Thermal Current in open air 25….45 40…..63
Ith (Amps)
in enclosure 40°C 25….45 32…..50
in enclosure 60°C 25….32 25…..40
Utilization Category DC-21B
Number of Poles 2….4 2….6
Rated Operational Current Ie (Amps) 1 circuit 16...32 16...32
at 660 V DC
2 circuits 16...32 16...32
3 circuits 16...32
Rated Operational Current Ie (Amps) 1 circuit 10….32 10....20
at 1000 V DC 2)
2 circuits 10….32 10....20
3 circuits 10....20
Wire Size Range mm² 2.5….16
Reference Standards UL508i
Number of Poles - 2….6
Rated Current (Amps) 1 circuit - 10….25
at 600 V DC
2 circuits - 16….32
3 circuits - 16
Ambient temperature °C - -20…+60
Short Circuit Rating kA, 600V - 5
Protection Type - RK5 Fuse
A, Max Fuse Size - 70
Wire Size Range AWG - 12-6 AWG
1) For additional technical details, refer to OTDC Main Catalog
2) 1000 V DC not applicable to OTDC_US, UST versions.

Examples
One PV Circuit Two PV Circuit Three PV Circuit
2 Pole 4 Pole 6 Pole
OTDC_F2, FT2 OTDC_F4, FT4 OTDC_F6, FT6
OTDC_U2, UT2 OTDC_U4, UT4 OTDC_U6, UT6

Inverter 1Inverter
Inverter
1 1 Inverter 1Inverter
Inverter
Inverter
1 1 2Inverter
Inverter
2 2 Inverter 1Inverter
Inverter
Inverter
1 1 2Inverter
Inverter
Inverter
2 2 3Inverter
Inverter
3 3
+ -+ + - - + -+ + +- - -+ + - - + -+ + +- - -+ + +- - -+ + - -
(-) (+)
(-) (-) (+) (+) (-) (+)
(-) (-) (-)(+) (+) (+)
(-) (-) (+) (+) (-) (+)
(-) (-) (-)(+) (+) (+)
(-) (-) (-)
(+) (+) (+)
(-) (-) (+) (+)

+ -+ + - - + -+ + +- - -+ + - - + -+ + +- - -+ + +- - -+ + - -
(-) (+)(-) (-) (+) (+) (-) (+)
(-) (-) (-)
(+) (+) (+)
(-) (-) (+) (+) (-) (+)
(-) (-) (-)
(+) (+) (+)
(-) (-) (-)
(+) (+) (+)
(-) (-) (+) (+)
Panel 1 Panel Panel
1 1 Panel 1 Panel
Panel
Panel
1 1 2 Panel
Panel
2 2 Panel 1 Panel
Panel
Panel
1 1 2 Panel
Panel
Panel
2 2 3 Panel
Panel
3 3
40 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

—
Switch-disconnectors
1000 V DC and up to 1600A: OTDC100...1600

The OTDC series of switch-disconnectors is available with nominal currents from

100 to 1600 A.
OTDC 100...800: Two poles in series provides compact performance up to 1000 V DC.
Up to three 1000 V circuits can be operated with a single device. It is also possible
to use the switch as a combiner, with separate inputs and a combined output of up
to 1500A.
OTDC1000...1600: Four poles in series provides compact performace up to 1000 V DC
for use in high power applications.

The main features of the OTDC100…1600 switch-disconnectors include:

• Compactness: thanks to the patented DMB (Dual Magnetic Breaking) technology,
the switches reach 1000 V DC with two poles in series for most sizes.
• Easy to install: connections are simple and independent from polarity, for
providing greater wiring flexibility. The operating mechanism can be located
between the poles or on the left side of the switch.
• Factory-installed or jumper kits available.
• Safety: Visible contacts allow a clear indication of position.
 41

Main technical specifications 1) OTDC100…250 OTDC250…800 OTDC1000…1600

OTDC100… OTDC100… OTDC315… OTDC250… OTDC1000… OTDC800…

250E_ 200U_ 800E_ 600U_ 1600E_ 1000U_
Wiring configuration
Two-wire breaking E types U types E types U types E types U types

Single-wire breaking US types US types US types

Reference Standard IEC 60947-3 IEC 60947-3
Nominal Current In (Amps)
100, 160, 315, 400, 500, 250, 320, 1000, 1250,
200, 250 160, 200, 250 630, 800 400, 600 1600 800, 1000

Rated Insulation Voltage (Ui)

Pollution degree 3 V 1000 1500
Rated Impulse Voltage (Uimp) kV 12 12
Number of Poles 2…6 2…6 4
Rated Thermal Current Ith (A) in open air 100…250 315…800 1000…1600
in enclosure 40°C 100…250 315…800 1000…1250
in enclosure 60°C 100…200 315…680 800…1000
Utilization Category DC-21B DC-21B
Rated Operational Current Ie 1 circuit 100…250 315…800 1000…1600
(A) at 1000 V DC
2 circuits 100…250 315…500 –
3 circuits 100…200 315…500 –
Rated Operational Current 2 input circuits,
Ie of combined output (A) 1 output – 315….500, 630…1000 –
at 1000 V DC 3 input circuits,
1 output – 315….500, 945…1500 –
Reference Standard UL 98B UL 98B
Number of Poles – 2...4 – 2…4 - 4
Rated Current (A) 1 circuit – 100…200 – 250…600 - 800…1000
at 1000 V DC
2 circuits – 100…200 – 250…400 - -
Rated Current (A) 250…400,
at 1000 V DC 3 circuits - 100...200 – – – 500…800 - 800…1000
Ambient temperature °C – -20…+50 – -20…+50 - -20…+50
Short Circuit Rating kA per input, 1000V – 10 – 10 - 10
Circuit Circuit Circuit
Protection Type – breaker – breaker - breaker
Wire Size Range MCM #4-300 #2-600 4x #4-300

Examples
Single PV Circuit Double PV Circuit Triple PV Circuit
1000 V DC IEC: 100-500A 1000 V DC IEC: 100-500A 1000 V DC IEC: 315-500A
1000 V DC UL: 100-400A 1000 V DC UL: 100–400A

Output Output
Output Output
Output 1 Output 11 2 Output
Output Output22 Output
Output 1 Output 11 2 Output
Output Output22 3 Output
Output Output33
+ - ++ -- + - ++ + -- - ++ -- + - ++ + -- - ++ + -- - ++ --

+ - ++ -- + - ++ + -- - ++ -- + - ++ + -- - ++ + -- - ++ --
Input Input
Input Input 1 Input11 2
Input
Input Input22
Input Input 1 Input11 2
Input
Input Input22 3
Input
Input Input33
Input
42 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Switch-disconnectors
1500 V DC and up to 500A: OTDC250...500

The OTDC series of switch-disconnectors is also available for operating voltages up

to 1500 V DC from 100A to 500A. OTDC250..500 switch-disconnectors can operate
up to two separate 1500 V DC circuits with a single device.

The main features of the OTDC100…500 switch-disconnectors include:

• Compactness: thanks to the patented DMB (Dual Magnetic Breaking) technology,
the switches reach 1500 V DC with a small footprint and with 3 poles in a most of
sizes.
• Easy to install: connections are simple and independent from polarity,
for providing greater wiring flexibility.
• Factory-installed or jumper kits available.
• Safety: Visible contacts allow a clear indication of position.

Main technical specifications OTDC100…200

1500 V DC basic versions OTDC100…200E_ OTDC100…200U_
Wiring configuration Two-wire breaking E types U types
Single-wire breaking US types
Reference Standard IEC 60947-3
Nominal Current In (Amps) 100, 200
Rated Insulation Voltage (Ui)
1500
Pollution degree 3
Rated Impulse Voltage (Uimp) kV 12
Rated Thermal Current Ith (Amps) in open air 100...200
in enclosure 40°C 100…200
in enclosure 60°C 100…200
Number of Poles 4 -
Utilization Category DC-21B
Rated Operational Current Ie (Amps) at 1500 V DC One circuit 100…200
Reference Standard UL 98B
Number of Poles 4
Rated Current (Amps) at 1500 V DC One circuit - 100…200
Ambient temperature °C - -20+50
Short Circuit Rating kA, 1500V - 10
Protection Type - Circuit breaker
Wire Size Range MCM - - #250-500

Examples

Single PV Circuit
1500V DC IEC: 100-200A
1500V DC UL: 100-200A
Ungrounded and Grounded System

2 4 6 8 2 4 6 8 2 4 6 8

1 3 5 7 1 3 5 7 1 3 5 7
+(-) LOAD -(+) +(-) -(+) +(-) LOAD -(+)
LOAD

Single circuit Single circuit Single circuit

E and U types E types US types
 43

Main technical specifications OTDC250…500

1500 V DC basic versions OTDC315…500E_ OTDC250…400U_
Two-wire breaking E types U types
Wiring configuration Single-wire breaking US types
Reference Standard IEC 60947-3
Nominal Current In (Amps) 315, 400, 500 250, 320, 400
Rated Insulation Voltage (Ui)
Pollution degree 3 V 1500
Rated Impulse Voltage (Uimp) kV 12
in open air 315…630
in enclosure 40°C 315…550
Rated Thermal Current Ith (Amps) in enclosure 60°C 315…440
Number of Poles 3…6
Utilization Category DC-21B
One circuit 315…500
Rated Operational Current Ie (Amps) at 1500 V DC Two circuits 315…500
Reference Standard UL 98B
Number of Poles - 3
Rated Current (Amps) at 1500 V DC One circuit - 250…400
Ambient temperature °C - -20…+50
kA, 1500V - 10
Short Circuit Rating Protection Type - Circuit breaker
Wire Size Range MCM - #2-600

Examples

Single PV Circuit Double PV Circuit

1500 V DC IEC: 315-500A 1500 V DC IEC: 315-500A 1500 V DC IEC: 315-500A
1500 V DC UL: 250-400A 1500 V DC UL: 250-400A Ungrounded System
Ungrounded System Grounded System

Output 1 Output 1 Output 11

Output Output 1 Output
Output 1 1 Output 1 Output 2 Output 12
Output Output 2
- - -+ + + - - - -- -

- + - + + + - + ++ + - ++ - + + - + + -- + ++ ++ - + +
Input 1 Input 1 1
Input Input 1Input 1 Input 11
Input Input 1 Input 1 Input
Input
1 1 Input 2 Input 12
Input Input 2
Output 1

Output 1

Input 1

Output 2

Input 2
Output 1

Output 1

Input 1

2
Output 1

Output 1

Input 1

Output 2

Input 2
Output

Input
44 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Monitoring system

Main technical specifications

General data
Degree of protection IP20
Ambient temperature range (operation) -20°C ... 70°C
Ambient temperature range (storage) -40°C ... 85°C
Dimensions W / H / D 22.5 / 102 / 128.5 mm
Screw connection solid / stranded / AWG 0.2 ... 2.5 mm² / 0.2 ... 2.5 mm² / 24 - 12
Tightening torque 0.5 - 0.6 Nm
Humidity at 25°C, no condensation ≤ 95%
Altitude ≤ 2000 m
Installation on DIN rail 35 mm (DIN EN 50022)
Pollution degree 2
CE-compliant
Conformance with EMC Directive 2004/108/EC and
Conformance/approvals Low Voltage Directive 2006/95/EC
Referenced standard EN 61010-01:2011-7
Current measuring modules
Supply
Supply voltage Via SCK-C-MODBUS
Typical internal power consumption 43 mA
Maximum internal power consumption 50 mA
Measuring inputs
Current measuring range 0 … 20 A DC
Maximum transmission error from measuring range final value ±1%
Temperature coefficient TC20 0.02% / K
Reverse current detection -1 … 0 A DC
Number of measuring channels 8
Overload capacity 5 x IN
Connection method 9.5 mm through connection
Digital input
Controlled by external floating contact Yes
Cable length ≤ 30 m
Analog input
Input voltage range 0 … 10 V -
Analog output
Output voltage range 24 V supply for 2903591 -
Cable length (for 0.15 mm²) 0.5 m, maximum -
Cable type Twisted, shielded -
Data interface for SCK-C-MODBUS
Cable length (for 0.15 mm²) ≤ 300 m
Cable length (for 1.5 mm²) ≤ 500 m
Cable type Twisted, shielded
Communication protocol Proprietary
The monitoring system will be factory fitted with combiners as a complete solution and will not be available for sale as a separate component.
 45

Main technical specifications

Voltage measuring module

Voltage measurement SCK-M-U-1500V (Order No. 2903591)
Supply
Supply voltage 24 V DC (-10% … +25%) or via current monitoring module
Typical internal power consumption 8 mA
Maximum internal power consumption 65 mA
Measuring inputs
Voltage measuring range 0 ... 1500 V DC
Maximum transmission error from measuring range final value 1% after additional adjustment (valid for 100 … 1500 V DC)
Temperature coefficient from T > 25°C 0.01% / K
Number of measuring channels 1
Connection method Screw connection
Minimum terminal block distance 32 mm
Surge voltage 6 kV
Analog output
Output voltage range 2 … 10 V
Cable length (for 0.15 mm²) 0.5 m, maximum
Cable type Twisted, shielded
Communication module
Supply
Supply voltage 24 V DC (-10% … +25%)
Typical internal power consumption 22 mA
Maximum internal power consumption 45 mA
Maximum current consumption 800 mA
Data interface for SCK bus
Cable type Twisted, shielded
Communication protocol Proprietary
Serial interface (RS-485)
Serial transmission speed 9.6 / 14.4 / 19.2 / 38.4 kbps
Cable length 1200 m, maximum
Cable type Twisted, shielded
Communication protocol Modbus RTU
Optional termination resistor (not supplied as standard) 180 Ω
Operating mode Half duplex
46 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Switchboards
Gemini IP 66

Main technical specifications Gemini IP 66

Protection
Protection class IP 66 (CEI EN 60529)
Insulation class II
Strength
Material joint-injection moulded thermo-plastic
Heat and fire resistance up to 750 °C (IEC EN 60695-2-11)
Shock resistance IK10 (IEC EN 50102)
Protection against chemicals water, saline solutions, acids, basics,
and weather conditions mineral oils, UV rays
Operating temperature -25 °C…+100 °C
Performance
Nominal insulation voltage 1000 V AC – 1500 V DC
6 sizes from 335 x 400 x 210 mm
Flexibility WxHxD, to 840 x 1005 x 360 mm
external dimensions DIN modules from 24 to 216
Installation Snap-in assembly of all components
Standards, quality, environment IEC EN 50298, IEC 23-48, IEC 23-49,
IEC 60670, IEC EN 60439-1 IMQ Mark according to the
IEC EN 50298 standard. Fully recyclable.
NEMA Types: 1, 3R, 4, 4X
UL Listed: UL508A, UL50, UL50E
CSA Listed: C22.2 Nr14

Boxes and doors

• RAL 7035 grey color

External Internal Max num.

Size WxHxD (mm) WxHxD (mm) DIN mod.
1 335x400x210 250x300x180 24 (12x2)
2 460x550x260 375x450x230 54 (18x3)
3 460x700x260 375x600x230 72 (18x4)
4 590x700x260 500x600x230 96 (24x4)
5 590x855x360 500x750x330 120 (24x5)
6 840x1005x360 750x900x330 216 (36x6)
 47

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Wall mounting consumer units
EUROPA65 series

The Europa series wall-mounting units feature IP65 protection which makes them
ideal for outdoor installation. This means that they can be used for making string
boxes on the load side of photovoltaic strings.
The main features of the Europa series wall-mounted units include:
• class II insulation
• manufactured in self-extinguishing thermoplastic material able to withstand
abnormal heat and fire up to 960 °C (glow wire test) in compliance with
IEC 60695-2-11 standards
• installation temperature: -25 °C to +60 °C
• nominal insulation voltage: 1000 V AC; 1500 V DC
• shock resistance: 20 joules (IK 10)
• pull-out DIN rails holder frame for more convenient bench wiring.
Can be disassembled (and re-assembled by means of a snap-fit mechanism) to
make the individual wires easier to route
• 53, 68 and 75 mm depth switchgear can be installed
• consumer units in compliance with IEC 23-48, IEC 23-49 and IEC 60670 standards

Description Type Dimensions (mm)

IP65 consumer unit P/smoke grey 8M 205x220x140
IP65 consumer unit P/smoke grey 12M 275x220x140
IP65 consumer unit P/smoke grey 18M 1 row 380x220x140
IP65 consumer unit P/smoke grey 24M 2 rows 275X370X140
IP65 consumer unit P/smoke grey 36M 2 rows 380x370x140
48 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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EUROPA65 junction boxes

ABB provides IP65 polycarbonate junction boxes that are perfect for use in outdoor
installations.
The main features of the junction boxes include:
• class II insulation
• manufactured in self-extinguishing thermoplastic material able to withstand
abnormal heat and fire up to 960 °C (glow wire test) in compliance with
IEC 60695-2-11 standards
• installation temperature: -25 °C to +60 °C
• nominal insulation voltage: 1000 V AC; 1500 V DC
• shock resistance: 20 joules (IK 10 degrees)
• junction boxes in compliance with IEC 23-48 and IEC 60670 standards
• IMQ approved

Description Type Dimensions (mm)

Box IP65 PC 140x220x140
Box IP65 PC 205x220x140
Box IP65 PC 275x220x140
Box IP65 PC 275x370x140
Box IP65 PC 275x570x140
Box IP65 PC 380x570x140
 49

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Distribution blocks
DBL

The DBL distribution blocks are adapted to the most recent solar inverters
requirements with a voltage rating going up to 1500V DC IEC (1000V DC UL).
They provide the benefit of 3 configurations in 1 single product: grouping several
inputs into one output for DC applications, or single and multipole splitting for
AC power applications.

The reversible cover facilitates identification and wiring tasks, and the modular and
touch proof design eliminates the need for bus bars, isolators, fasteners or
protection screens.

Finally it saves up to 50% rail space compared to conventional distribution bars.

RoHS

Main technical specifications DBL

Section Number of inputs Rated voltage
16 mm2 4 AWG 80A 7 1500 V DC (IEC) 1000 V DC (UL) DBL80
35 mm2 2 AWG 125A 8 DBL125
50 mm2 2/0 AWG 160A 8 DBL160
175A 12 DBL175
95 mm2 250 Kcmil 250A 12 DBL250
150 mm2 400 Kcmil 400A 12 DBL400

PV module String combiner

50 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Connection devices
SNK terminal blocks

The SNK terminal blocks are suitable for AC power applications and DC photovoltaic
systems with a voltage rating going up to 1250V DC IEC and 1000V DC UL.

2 technologies are available with common accessories:

• The screw clamp technology is the most accepted technology
providing the highest choice of functions and enabling to connect
2 wires in 1 clamp.
• The PI-Spring technology is a screwless technology that combines
2 connection modes: direct push-in for 50% time saving compared to screw,
and connection using a screwdriver for improved comfort. It is particularly well
adapted for high demanding environment with vibration and shock.

DC side Main technical specifications SNK

Section AWG Current N. of Rated voltage
(mm2) IEC (A) UL (A) connections IEC UL
Screw clamp 2.5 to 10 14 to 6 32 to 57 20 to 42 2 1030V DC 600V DC ZS4…10
16 4 76 67 1050V DC ZS16
25 3 101 100 1000V DC * ZS25
50 to 95 1/0 to 3/0 150 to 232 140 to 230 1250V DC 1000V DC ZS50…95
PI-Spring 2.5 to 10 12 to 6 24 to 57 20 to 55 2/3 1000V DC 600V DC ZK2.5…10
ZK2.5…10-3P
2.5 and 4 12 and 10 24 and 32 20 to 30 4 1000V DC 600V DC ZK2.5-4P
ZK4-4P
10 and 16 6 and 4 57 and 76 55 to 75 2 1000V DC 600V DC ZK10
ZK16
3 1250V DC 1000V DC ZK10-3P
ZK16-3P

* With dedicated accessories

For AC side, all the SNK terminal blocks can be used.

Inverter

PV module

String combiner
 51

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Primary switch mode power supplies
CP-E and CP-C.1 range

CP-C.1 range
The CP-C.1 power supplies are ABB’s higher performance and most advanced range.
With excellent efficiency, high reliability and innovative functionality it is prepared
for the most demanding industrial applications. These power supplies have a 50
% integrated power reserve and operate at an efficiency of up to 94 %. They are
equipped with overheat protection and active power factor correction. Combinded
with a broad AC and DC input range and extensive worldwide approvals the CP-C.1
power supplies are the preferred choice for professional DC applications.
Giving the power to control.

Key features
• Rated output voltage 24 V DC
• Power reserve design delivers up to 150 % at Ta ≤ 40 °C
• Output voltage adjustable via front-face rotary potentiometer “OUTPUT Adjust”,
22.5-28.5 V
• Input voltage range 100-240 V AC, 90-300 V DC
• High efficiency
• Low power dissipation and low heating
• Free convection cooling (no forced cooling)
• Ambient temperature range during operation -25...+70 °C
• Open-circuit, overload and short-circuit stable
• Integrated input fuse
• DC OK - signaling output "13-14" (Relay),
• Power reserve signaling output "I > IR (Transistor)
• Redundancy unit CP-A RU offering true redundancy, available as accessory
52 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

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Primary switch mode power supplies
CP-E and CP-C.1 range

CP-E range for 24 V DC applications

The CP-E range offers enhanced functionality while the number of different types
has been considerably reduced. Now all power supply units can be operated at an
ambient temperature of up to +70 °C.

Key features

• Output voltage 24 V DC
• Adjustable output voltages
• Output currents 0.75 A / 1.25 A / 2.5 A / 5 A / 10 A / 20 A
• Power range 15 W, 30 W, 60 W, 120 W, 240 W, 480 W
• High efficiency of up to 90 %
• Low power dissipation and low heating
• Free convection cooling (no forced cooling with ventilators)
• Ambient temperature range during operation -40...+70 °C
• Open-circuit, overload and short-circuit stable
• Integrated input fuse
• U/I characteristic curve on devices > 18 W
(fold-forward behaviour at overload – no switch-off)
• Redundancy units offering true redundancy
• LED(s) for status indication
• Signalling output/contact for output voltage OK
Transistor on 24 V devices > 18 W and < 120 W
• Solid-state on 24 V devices ≥ 120 W
• Approvals / Marks
(depending on device, partly pending):
•
 53

—
Note
54 S T R I N G C O M B I N E R S F O R S O L A R P H O T OVO LTA I C S Y S T E M S

Additional information
We reserve the right to make technical
changes or modify the contents of this
document without prior notice. With
regard to purchase orders, the agreed
particulars shall prevail. ABB AG does
not accept any responsibility whatso-
ever for potential errors or possible lack
of information in this document.

We reserve all rights in this document

and in the subject matter and illustra-
tions contained therein. Any reproduc-
tion, disclosure to third parties or
utilization of its contents – in whole or
in parts – is forbidden without prior
written consent of ABB AG.
55
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1SLC009000D0202 - 11.2017

© Copyright 2017 ABB. All rights reserved.

Specifications subject to change without notice.