Codes and standards Challenges
General overview
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The International Electrotechnical
Commission
 The world’s leading organization that prepares and
publishes International Standards for all electrical,
electronic and related technologies.
 Over 10 000 experts from industry, commerce,
government, test and research labs, academia and
consumer groups participate in IEC Standardization
work.
 All information is on www.iec.ch
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The International Electrotechnical
Commission
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The International Electrotechnical
Commission
IEC family (2011-03-18)
Full members
60
Associate members
21
Affiliate countries
81
IEC – Central office
Geneva
IEC – Regional centers
Boston, USA – 2 Technical Officers + 2 Assistants
Singapore – 2 Technical Officers + 2 Assistants + 1 Editor
+ 1 Office Manager
Sao Paulo, Brazil – 1 Regional Manager + 1 assistant
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IEC in Figure (2011-03-18)
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IEC Technical Committees
and Subcommittees (TC/SC)
174
Working Groups (WG)
425
Project Team (PT)
221
Maintenance (MT)
543
IEC Experts
10512
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IEC SMB SG4
 Set up in 2009
 Title:
LVDC distribution systems up to 1500V DC
 The objective
a global systematic approach
to align and coordinate activities in many areas where
LVDC is used such as
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green data centres,
commercial buildings,
electricity storage for all mobile products (with batteries), EVs etc,
including all mobile products with batteries, lighting, multimedia, ICT
etc. with electronic supply units.
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IEC SMB SG4
 The SG4 had 4 meetings
Twice in Stockholm (2009-12 and 2010-01)
Tokyo was held as an ad hoc meeting due to little
participation due to the Icelandic volcano ash
Washington (2010-09)
Frankfurt (2011-02)
 Next meetings are planned for
Japan (2011-11/12)
USA (2012/04)
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IEC SMB SG4
 Main topics achieved
The title
 Dc linked to energy efficiency or wider?
 Decision:
LVDC distribution systems up to 1500V DC
The scope
The objectives
The deliverables
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IEC SMB SG4
The scope
 To address the IEC standardization needs on systems and products
to be used with dc voltages up to 1500 V and to indicate to SMB the
directions for future standardization in this field.
 To facilitate the effective and safe use of dc to address market
needs, such as.
 Energy efficiency
 Reduction of EM phenomena
 Reduction of the use of natural resources
 To inform the concerned technical bodies on the draw backs related
to dc, such as.
 Arcing
 Corrosion
 Overvoltages
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IEC SMB SG4
The scope
 To set up a road map on how to reach global systematic approach
on LVDC
 Defining a structure for cross TC cooperation which promotes
coordination of the work.
 Encouraging the transfer of information between product
committees and horizontal committees (bidirectional).
 Encouraging regular TC reports on progress and planned work.
 To accompany the progress in the implementation of the road map.
 To support SMB to clear up possible overlaps between
responsibilities of the related TCs and SCs
 To address certain topics to the advisory committees if relevant and
necessary
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IEC SMB SG4
The objectives
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Measuring methods
Architecture of the system: 100% dc or hybrid
System earthing (Grounding)
Operation of equipment.
Life cycle of equipment.
Protective measures for hazards of LVDC distribution systems.
 Fire hazard: Insulation faults, making and breaking of current,
overcurrent, arcing
 Electric shock / worker safety
 Overvoltage protection
 The impact of dc on
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 corrosion
 The characteristics of insulation material
 insulation coordination
 ignition and arcing
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IEC SMB SG4
The objectives – applications
 LVDC can be used in applications, such as:
 in the frame of Energy efficiency (reduction of conversion losses)
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green data centres in US, JP, FR, SE, …
high tech buildings – continuous supply of electricity (e.g. In hospitals)
commercial buildings with a lot of lighting
DC-Grid / Sub-Grid
 easy integration of renewable energy sources (dc), such as
 Photovoltaic, fuel cells, wind turbines, osmotic power
 island energy network (including local production and storage)
 Easy integration of storage in the network (e.g. Batteries, flywheels)
 to easily accommodate existing and new applications, e.g.
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all mobile products (with batteries)
all products having electronic supply units (lighting, multi-media equipment,
ICT equipment, etc)
wiring system for data transfer
 for charging electrical vehicles
/ vehicle to grid
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IEC SMB SG4
The deliverables
 Analysing market and industry developments in its area,
 Identifying the TCs (technical committees) and SCs
(subcommittees) concerned,
 Analysing the current level of TCs/SCs (technical
committees/subcommittees) activities and identify where
future activity is required,
 Defining a structure for the coordination of cross TC/SC
work, where required,
 Monitoring TC/SC work to highlight any overlap of work
or potential inconsistencies.
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IEC SMB SG4
The deliverables - market and industry developments
 Analyzing market and industry developments in its area,
Workshops are organized
 Now Washington
 2011/09 Frankfurt
 Goals of the Frankfurt workshop:
To identify the market drivers for using LVDC
(market drivers are e.g. E², safety, easy to install, reliability, maintenance, cost,
availability of energy, size factor, EMC)
Challenges and available technology
The conclusion of the workshop is to report on market
needs/reality to IEC SMB SG4
The SG4 can use, during it’s further work, the report to work on the roadmap,
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IEC SMB SG4
The deliverables – technical work
 Identifying the TCs (technical committees) and SCs
(subcommittees) concerned,
 Analysing the current level of TCs/SCs (technical
committees/subcommittees) activities and identify where
future activity is required,
 Defining a structure for the coordination of cross TC/SC
work, where required,
 Monitoring TC/SC work to highlight any overlap of work
or potential inconsistencies.
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IEC SMB SG4
The deliverables – technical work
There is need for participation of
 technical bodies responsible for products
generating, distributing and consuming
energy to analyze the impact of dc within
their field
TC82
TC88
TC105
TC114
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TC13
SC17B
SC17D
TC20
TC22
TC23
SC32B
SC37A
TC64
TC94
TC2
TC34
TC59
TC61
TC62
TC69
TC96
TC100
TC108
Technical bodies represented in the SG4
Technical bodies represented in the SG4 via liaisons
 technical bodies
responsible for
horizontal issues, to
analyse the impact of
dc within their field
SG1
SG3
TC8
TC15
TC64 (IEC61140)
TC73
TC77
TC89
TC106
TC109
TC112
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IEC SMB SG4
The deliverables – technical work – challenges
 To further analyze the hazards linked to the use of dc
and to find the appropriate technical body to do the
standardization work (see next slide on Challenges)
 To make a final report on the standardization needs
(Road Map)
 To receive reports on dc of the different technical bodies
and analyze the progress and report to SMB
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IEC SMB SG4
The deliverables – challenges
Distribution
voltage
dc
Challenges
Life cycle of equipment
Fire hazard
Insultion faults
Making and breaking – no ‘0’ crossing
Overcurrent
Arcing/ignition
Overvoltage
Corrosion
400V dc
(+/-200V)
Electric shock – RCD
48V/19V dc
Voltage drop in the installation
Impact on insulation characteristics of material
SELV in the fixed installation
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Class II in fixed installation
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Global standards – global solutions
 If the market decides, dc is a solution on certain case,
this will give us the opportunity to create a package of
real international standards applicable in all major
markets
 To achieve this, there is need for contributions of experts
specialized in
IEC type installations and
NEC type installations
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Progress of the work on dc in IEC
 SG4: plans to have a workshop to define the market
drivers for the use of dc – September 2011
 TC23 WG8:
 has set together general rules for dc accessories: future
TR61916-2
 is working on a standard for 5A-10A/400V dc plugs and SO
 TC64: is analysing the installation rules to define the
gaps in the standard where the use of dc is not covered
 SC23E: is to start a discussion on protective devices for
dc circuits
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Thank you
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