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DC Combiner box and AC solutions
Leadership in circuit protection
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Eaton and Cooper united.
Energizing a world
that demands more.
We deliver:
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Electrical solutions that use less energy, improve power reliability
and make the places we live and work safer and more comfortable
Hydraulic and electrical solutions that enable machines to deliver
more productivity without wasting power
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Vehicle drivetrain and powertrain solutions that deliver more power
to cars, trucks and buses, while reducing fuel consumption and emissions
Discover today’s Eaton.
Powering business worldwide
As a global power management company, we help
customers worldwide manage the power needed for
buildings, aircraft, trucks, cars, machinery and businesses.
Eaton’s innovative technologies help customers manage
electrical, hydraulic and mechanical power more reliably,
efficiently, safely and sustainably.
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We provide integrated solutions that help make energy,
in all its forms, more practical and accessible.
With 2013 sales of $22 billion, Eaton has approximately
100,000 employees around the world and sells products
in more than 175 countries.
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EATON DC Combiner box and AC solutions
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Company overview
Bussmann, a division of Eaton, is the
leading source of circuit protection
solutions in the global marketplace.
Bussmann products are approved
for use around the world and meet
agency requirements and international
standards: IEC, VDE, DIN, CCC, UL, CSA,
BS and others.
Bussmann global headquarters are in
St Louis, Missouri (US), the European
headquarters are in Burton-on-theWolds, Leicestershire (UK), and AsiaPacific based in Shanghai. Bussmann
manufactures over 50,000 unique
parts covering extensive circuit
protection solutions for a wide range
of applications and markets, including:
utility, industrial, renewable energy,
automotive and hybrid electric vehicles
and rail applications.
Drawing on a hundred years of fuse
design and expertise, Bussmann has
been at the forefront of the solar
PV market as it has evolved to
become a mature sustainable and
adaptive technology.
PV systems, as with all electrical
power systems, must have appropriate
protection to ensure safe reliable
operation. Throughout this evolution
Bussmann has worked closely with
solar system manufacturers and through
coordinated research and development
has produced revolutionary new fuse
links, surge protection devices and
integrated solutions to ensure people,
property and payback are protected.
As a leading exponent in the design,
development and manufacture of
overcurrent protection, the Bussmann
team of specialist engineers play
a leading role in international
standardisation of photovoltaic fuse
links, offering comprehensive advice on
selection and applications
With a global manufacturing footprint
and a continual commitment to meet
our customers’ needs Bussmann
continues develop innovative highquality products for the PV market,
protecting tomorrows’ future, today.
EATON DC Combiner box and AC solutions
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Residential installations
Due to their small size, system protection is often overlooked
within residential PV installations. On the contrary adequate
protection of the DC and AC circuits in residential installations
is just as critical as in much larger systems. Typically made of
one or two strings of eight modules, high voltage DC cables may
be run throughout the residential building; here it is critical to
protect people and property from fire and death in the event of
accidental damage or system failure.
Residential installations < 50kW
• Combiner box
• SPD
• Switch
• Inline fuse holder
• Fireman’s switch
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EATON DC Combiner box and AC solutions
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Residential combiner box
For residential systems where inline fuses are used a simple two string combiner box with DC isolation
and PV surge protection can be custom designed in a convenient compact unit.
Standards
Number of strings
Voltage
Fuse
DC load isolation
Overvoltage protection
* Typical configuration
IEC 61439-1, IEC 61439-2 and IEC 60363-7-712
2*, 3, 4
up to 1000 Vdc
Optional 10x38 gPV 8 to 12A*
Recommended 25 Adc* to 63 Adc
PV T2*
DC overvoltage protection
Integrated as part of the residential combiner box or installed separately, the DC surge protection device
(SPD) protects against damaging voltage surges typically caused by indirect or direct lightning strikes.
Standards
SPD test class
Voltage
Short circuit current rating Iscpv
Max discharge current In (8/20)μs
Lightning impulse current Iimp (10/350)μs
* Typical configuration
EN 50539-11
PV T2*
600 Vdc*, 1000 Vdc
160 Adc*
40 kA*
-
EN 50539-11
PV T1/T2
600 Vdc, 1000 Vdc
1000 Adc
40 kA
5 kA
10x38 mm photovoltaic fuse links
The Bussmann range of photovoltaic fuse links are specifically designed to provide high quality
protection and isolation for photovoltaic installations ether at string level or within the combiner box.
Standards
Voltage
Operating Class
Current Ratings
Size
* Typical values
IEC 60269-6, UL 2579, CSA, CCC (1-15A), RoHS compliant
1000Vdc
gPV
1 – 6A, 8A, 10A*, 12A*, 15A, 20A, 25A
10x38mm
Fireman’s switch
The PV Fireman’s switch is a DC switch disconnector that isolates the lines between the solar modules
and the inverter. With the option for remote and under-voltage operation the PV Fireman’s switch
enables firefighters to safely isolate the DC lines in the event of a fire.
Standards
Voltage
Number of switches
Switch rating
Inputs/Outputs
Terminal type
* Typical values
IEC/EN 60947-3
1000Vdc
1*
30A
1 in*/1 out*, 2 in/2 out
MC4* or M12 gland
Inline fuse holder
Ideal for residential systems of only one or two strings the Bussmann Inline fuse holder is a single pole,
non-serviceable PV fuse and fuse holder assembly in an IP67 dust tight and temporary water immersion
resistant housing for use in PV wire harnesses.
Standards
Voltage
Fuse
Current Ratings
IP protection
Terminals
* Typical values
CE (IEC 60269-6 fuse), UL , CSA Component Acceptance
1000Vdc
gPV 10x38mm
1 – 6A, 8A, 10A*, 12A*, 15A, 20A, 25A
IP67
Crimp connection for single/stranded 12-10AWG PV cable
EATON DC Combiner box and AC solutions
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Commercial installations
As PV installations become larger, typically found in commercial
rooftop systems, designing the correct PV protection becomes
more important. Typically ranging from 50kW to a few Mega
Watts these systems require careful consideration to ensure that
they have correct protection and meet national and local codes
for installation and connection to the grid.
Commercial installations 50kW to 1MW
• Combiner box
• Fireman’s switch
• G59 AC Panel 50kW
• Eaton’s engineering services
Eaton’s Electrical Services & Systems team
offers a comprehensive portfolio of services
tailored for every stage of a power system’s life
cycle – whether it’s design, build, or support.
Our services integrate and optimize the elements
of a power system to make sure it’s aligned with
business goals. We can help keep your power
system safe, efficient, reliable, and up-to-date.
6
EATON DC Combiner box and AC solutions
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Commercial combiner box
In commercial installations a small number of PV strings may be combined before being input into
a string inverter, this is particularly the case for thin-film module based systems. Here for example
Bussmann by Eaton can configure a three or four string combiner box to include gPV string fuses, DC
isolation, and T2 or T1/T2 surge protection devices.
Standards
Number of strings
Voltage
Fuse
DC load isolation
Overvoltage protection
Terminal type
IP protection
Enclosure
* Typical configuration
IEC 61439-1, IEC 61439-2 and IEC 60363-7-712
2, 3, 4*
up to 1000 Vdc
10x38 gPV 8 to 12A*
25 Adc to 63* Adc
PV T2*
MC4 connectors*, M16 glands
IP65
GRP* with transparent*/opaque lid and IP65 breather vent
Overvoltage protection
Owing to the increased size and complexity of commercial PV installations it is important to ensure both
AC and DC overvoltage protection is carefully considered and the right protection selected to prevent
damage in the event of an indirect or direct lightning strike.
Standards
SPD test class
Configuration
Voltage
Short circuit current rating Iscpv
Max discharge current In (8/20)μs
EN 50539-11
PV T2*, PV T1/T2
2 pole + PE
600, 1000* Vdc
160*, 1000 Adc
40 kA*
EN 61643-11/IEC 61643-1
T1, T1/T2, T2
1, 2, 3, 4 Pole, 1+NPE, 3+NPE
75 – 580 Vac, 280* Vac
35kA (T1), 50 kA (T1/T2)
Lightning impulse current Iimp (10/350)μs
* Typical configuration
5 kA (PV T1/T2)
40 kA (T2) (30 kA - 75 Vac T2)
35 kA (T1), 12.5 kA (T1/T2)
Fireman’s switch
In some markets national and local installation requirements may require the installation of a DC isolating Fireman’s switch. In this case the Eaton Fireman’s switch can be configured in larger switch-disconnector combinations necessary for commercial installations. With remote operation and under-voltage
release the individual strings can be fed separately into the string inverter helping to optimise inverter
performance.
Standards
Voltage
Number of switches
Switch rating
Utilization category
Inputs/Outputs
Terminal type
IP protection
* Typical configurations
IEC/EN 60947-3
1000 Vdc
2, 3, 4*, 6
30 A each input
DC-21A
2 in/2 out, 3 in/3 out, 4 in*/4 out*, 6 in/6 out
MC4* or M12 gland
IP65
AC side grid and systems protection
As PV systems become larger it is important to meet the national and local requirements for export to
the grid, here Eaton has a number of customisable solutions to meet these requirements. For the UK a
G59 distribution panel can be configured with integrated G59 relay and contactor as well as options for
power metering and incoming AC MCBs. Similarly for Germany a VDE-AR-N 4105 preconfigured unit can
be supplied in a number of rating classes from 43 to 100k VA.
Standards
Rated output
Rated operating voltage
Monitoring relay
Contactors
Terminal type
Metering
Isolator
* Typical configurations
G59
As required. Typically <500kW
230/400 Vac
G59/3 relay
4 pole, rated to suit system
Dependent upon cable size
Multi-function energy meter, MID certified with RS485 & pulse o/p
4 pole, rated to suit system
VDE-AR-N 4105
43, 55, 86, 100k VA
230/400 Vac
Yes
2 (DILMP series)
EATON DC Combiner box and AC solutions
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Utility installations
For large scale ground mount utility PV systems the challenges of
providing the correct type and level of system protection becomes
ever more critical as system voltages and operating currents are
typically significantly higher. Spread out over large areas, with export
powers typically in the magnitude of 10’s of MW these large scale
solar farms represent significant financial investments for the owners
and operators. For this reason it is critical to ensure safe and reliable
operation of the DC, LV and MV circuits within these systems as well
as meeting local and national codes for connection to the grid.
Utility installations > 1MW
• Combiner box
• Fireman’s switch
Eaton’s Electrical Services & Systems team
offers a comprehensive portfolio of services
tailored for every stage of a power system’s life
cycle – whether it’s design, build, or support.
Our services integrate and optimize the elements
of a power system to make sure it’s aligned with
business goals. We can help keep your power
system safe, efficient, reliable, and up-to-date.
8
EATON DC Combiner box and AC solutions
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Utility combiner box
For utility scale PV systems the fully customisable Bussmann by Eaton combiner box solution comes
into its own with numerous options for the number of input strings, gPV fuse ratings, and options for full
system monitoring of individual sting currents and system voltage, power supplies and surge protection
for DC, AC and communications. Using dedicated design rules the Bussmann by Eaton engineers tailor
the solution specific to the installation to ensure all levels of protection are covered.
Standards
Number of strings
Voltage
Fuse
DC load isolation
Overvoltage protection:
DC PV SPD
AC SPD±
Data line SPD±
Monitoring±
String current
Power supply
Communication
Terminal type
IP protection
Enclosure
* Typical configuration
± Monitored combiner boxes only
IEC 61439-1, IEC 61439-2 and IEC 60363-7-712
2 – 32 strings (20A fuse max), 2 – 16 strings (32A fuse max), 16 string*
up to 1000 Vdc
10x38 gPV 1 to 32A, 16A*
25 Adc to 500 Adc, 250 Adc*
PV T2*, PV T1/T2, remote indication±
280 Vac T2, 1 pole, 2 pole or 1+NPE, with remote indication
24 V D1/C2
8, 16, 24 string shunt based monitoring
External 24 Vdc, Internal 240 Vac to 24 Vdc, Internal 1000 Vdc to 24 Vdc
RS-485 2-Wire Modbus
Bottom or side entry MC4 connectors*, M16 glands
IP65*, IP55 with IP55 vents
GRP* with transparent*/opaque lid and IP65 breather vent
XL square body and NH photovoltaic fuse links
The Bussmann range of XL square body and NH photovoltaic fuse links are specifically designed to
provide reliable DC overcurrent protection needed for the demanding conditions of utility scale PV farms.
Typically used in re-combiners and inverters these fuse links are capable of interrupting low overcurrents
associated with faulted PV systems.
Standards
IEC 60269-6, UL 2579, RoHS compliant,
CSA (NH only), CCC pending
Sizes
Voltage
Current rating
Operating Class
Indication
Accessories
01XL, 1XL, 2XL, 3L
1000, 1100, 1200, 1500 Vdc
50 to 600A
gPV (UL PV)
Top indication
Microswitches, XL fuse holders
NH1, NH2, NH3
1000 Vdc
32 to 400A
gPV (UL PV)
Dual indication
Microswitches, NH fuse holders
Medium voltage switchgear Xiria ring main unit
The Xiria Ring Main Unit system is metal enclosed and air insulated, equipped with load-break switches
and circuit breakers for 12kV-20kA and 24kV-16kA networks.
They operate with a combination comprised of circuit breakers and electronic relays and feature
high level of operational safety and a compact design. A variety of options are available including an
extensible version.
Eaton’s full range of SF6-free medium voltage switchgear systems provide an opportunity to make an
active contribution to reducing the worldwide emissions of SF6-gas.
EATON DC Combiner box and AC solutions
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PV system overview
Eaton can offer a comprehensive range of products for safe, reliable and sustainable PV systems within
residential, commercial and utility sectors. Drawing on a hundred years of design and expertise the
Bussmann by Eaton combiner box can be configured as a simple 2 string unit for residential systems, up
to 34 strings with monitoring for utility scale systems.
With a focus on reliability and safety the Bussmann by Eaton combiner box solution has been designed
with superior thermal characteristic making it suitable for a range of environments with ambient
temperatures up to 50°C. Independent, third party testing and certification by TUV Rheinland gives
additional peace of mind that the product is fully compliant to IEC standards IEC 61439-1, IEC 61439-2
and IEC 60364-7-712.
With a global manufacturing footprint and local support, Eaton can meet the needs of PV installations
large and small throughout the world.
Feature
Custom design solution
TUV Rheinland tested and certified
Superior thermal design
Industry leading internal components
Global manufacturing footprint
Terminal type
IP protection
Enclosure
Benefit
Meets the needs any PV installation
Reassurance in design reliability and safety
Reliability in harsh environments up to 50°C
Confidence from 1000’s MWh of global use
Local support and reduced time frames
MC4 connectors*, M16 glands
IP65
GRP* with transparent*/opaque lid and IP65 breather vent
Residential
installations
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3
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7
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9
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Commercial
installations
Utility
installations
Residential combiner box
DC overvoltage protection
10x38 PV fuse links
Single fireman's switch
Inline fuse holder
Commercial combiner box
AC Overvoltage protection
Multiple fireman's switch
AC side grid protection
Utility combiner box
XL & NH PV fuse links
LV & MV switchgear
Eaton's Electrical Services & Solutions
EATON DC Combiner box and AC solutions
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Residential installations
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We power businesses with reliable, efficient and safe electrical
power management solutions. Combined with our personal service,
support and bold thinking, we are answering tomorrow’s needs
today. Follow the charge with Eaton. Visit eaton.com/electrical.
Contact your local Eaton Office
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Eaton Industries Manufacturing GmbH
Electrical Sector EMEA
Route de la Longeraie
71110 Morges, Switzerland
Eaton.eu
© 2014 Eaton
All Rights Reserved
Printed in UK
Publication No. BR132004EN
October 2014
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