abb -jkr seminar on iec 60439 and iec 61439 on 18 august 2009
TRANSCRIPT
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Sharing session with JKR onIEC 60439 and IEC 61439
Er. Lim Say Leong, Region Marketing Manager, South Asia, Automation Products Division, 18 August 2009
Title:Low voltage switchgear and controlgear assemblies- Requirements of today and tomorrow
Sypnosis:This sharing session covers the current IEC 60439 series and also the development of IEC 61439 for tomorrow.Salient requirements will be presented in details leaving time for discussions such as:
• difference between IEC 60439 and IEC61439,• type tested & partially type tested assemblies,• how to confirm/check construction compliance of
assemblies as per test report,• trend of busbar trunking system, etc.
My talk today
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SituationSituation
Many manufacturers could comply with IEC 60439.
Many also do not comply due to various reasons:
Lack of knowledge.
Difficulties to meet customization of their product.
Product not verified.
Pressure to reduce costs.
IEC – worldwide requirement in a global economy
Share our knowledge and experience
ABB sets the standard
Local presence and expertise
Best technology for the process
Cost-effective solutions
Responsive local service
A supplier with global guidance and direction
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Part 1 Type-tested and partially type-tested
assemblies.
Part 2 Particular requirements for busbar
trunking systems.
Part 3 Particular requirements for
distribution boards.
Part 4 Particular requirements for
assemblies for construction sites
(ACS).
Part 5 Particular requirements for cable
distribution cabinets (CDC).
IEC 60439 - structure
IEC 60890
Method of temperature-rise assessment by extrapolation
for partially type-tested assemblies (PTTA).
IEC 61117
Method of assessing the short-circuit withstand strength
of partially type-tested assemblies (PTTA).
IEC 61641
Guide for testing under conditions of arcing due to
internal fault.
Supported by other IEC specifications
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© ABB Group August 18, 2009 | Slide 7
IEC 60439 series – IEC 60439-1
Part 1
Type-tested and partially type-tested assemblies.
© ABB Group August 18, 2009 | Slide 8
IEC 60439 series – IEC 60439-2
Part 2
Busbar trunking system.
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© ABB Group August 18, 2009 | Slide 9
IEC 60439 series – IEC 60439-3
Part 3 Distribution boards where unskilled persons have access for their use.
© ABB Group August 18, 2009 | Slide 10
IEC 60439 series – IEC 60439-4
Part 4 Assemblies for construction sites
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IEC 60439 series – IEC 60439-5
Part 5 Cable distribution cabinets (CDCs) power distribution and installed outdoors in public places.
© ABB Group August 18, 2009 | Slide 12
IEC 60439 series
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Standards for switchboards – IEC 60439-1
Specification for type-tested (TTA) and partially type-tested assemblies (PTTA)
Defines and specifies the service conditions, constructional requirements, technical characteristics and tests of TTA & PTTA
Non-prescriptive
Allows the manufacturer to be innovative
Specified as minimum requirements for supplying of switchboards in projects together with ASTA or equivalent Certification locally
A combination of one or more switching devices together
with associated:
control,
measuring,
signaling,
protective,
regulating equipment, etc.,
completely assembled under the responsibility of the manufacturer.
© ABB Group August 18, 2009 | Slide 14
Low voltage switchgear & controlgear assemblies
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© ABB Group August 18, 2009 | Slide 15
What is TTA and PTTA?
A low voltage switchgear and controlgear assembly conforming to an established type or system without deviations likely to significantly influence the performance, from the typical assembly verified to be in accordance with this standard.
ABB Elettrocondutture
Quadri per distribution
Quadri elettrici per bassa tensione
H. T109-I-01maggio '97
catalogue
TypeType--tested assembliestested assembliesTTATTA
A low voltage switchgear and controlgear assembly containing both type-tested and not type tested arrangements provided that the latter are derived (e.g. by calculation ) from type-tested arrangements which have complied with the relevant tests.
calculation
Partially TypePartially Type--tested assembliestested assembliesPTTAPTTA
© ABB Group August 18, 2009 | Slide 16
Testing of switchboards
1 verify temperature rise limits
2 verify dielectric properties
3 verify short-circuit withstand
4 verify protective circuit effectiveness
5 verify clearances and creepage distances
6 verify mechanical operation
7 verify degree of protection
9 Test 8-3-1: Overall inspection
10 Test 8-3-2 or 8-3-4: Insulation check
11 Test 8-3-3: verify protection measures & electrical continuity of protective circuits
Performed and carried out on a representative unit
Maximum safety and reliability
The 3 routine tests must be carried out on every switchboard
8 Type test8 Type test
+ 3 Routine tests+ 3 Routine tests8 verify emc
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Defined by a number of key parameters.
Specified by the manufacturer, sometimes by agreement
between the manufacturer and user of the equipment.
These characteristics, for example, may depend upon the
environment in which the equipment is required to operate
and the fault level of the supply to the equipment.
The manufacturer must specify the relevant characteristics
for the relevant type-tests to be conducted by the testing
station.
© ABB Group August 18, 2009 | Slide 17
Characteristics of switchboards
Rated Voltage Rated Operational Voltage (Ue)
Rated Insulation Voltage (Ui)
Rated Impulse Withstand Voltage (Uimp)
Rated Current (In)
Rated Short-time Withstand Current (Icw)
Rated Peak Withstand Current (Ipk)
Rated Conditional Short-circuit Current (Icc)
Rated Fused Short-circuit Current (Icf)
Rated Diversity Factor
Rated Frequency
© ABB Group August 18, 2009 | Slide 18
Electrical characteristics of switchboards
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On Nameplates
manufacturer's name or trade mark
type designation or identification number, or any other means of identification making it possible to obtain relevant information from the manufacturer
On Nameplates or Technical documentation
IEC 60439-1;
Type of current (and frequency, in the case of a.c.);
Rated operational voltages (see 4.1.1);
Rated insulation voltages (see 4.1.2);
Rated impulse withstand voltage, when declared by the manufacturer (see 4.1.3);
Rated voltages of auxiliary circuits (if applicable);
© ABB Group August 18, 2009 | Slide 19
Information to be provided
On Nameplates or Technical documentation Limits of operation (see clause 4); Rated current of each circuit (if applicable; see 4.2); Short-circuit withstand strength (see 7.5.2); Degree of protection (see 7.2.1); Measures for protection of persons (see 7.4); Service conditions for indoor use, outdoor use or
special use, if different from the usual service conditions as given in 6.1;
Pollution degree, when declared by the manufacturer (see 6.1.2.3);
Types of system earthing for which the ASSEMBLY is designed;
Dimensions, preferably in the order of height, width (or length), depth;
Weight;
© ABB Group August 18, 2009 | Slide 20
Information to be provided (cont’d)
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On Nameplates or Technical documentation
Form of internal separation (see 7.7);
Types of electrical connections of functional units (see 7.11);
Environment 1 or 2 (see 7.10.1).
© ABB Group August 18, 2009 | Slide 21
Information to be provided (cont’d)
Ambient air temperature
Ambient air temperature for indoor installations
Does not exceed +40 °C and its average over a period of 24 h does not exceed +35 °C.
The lower limit of the ambient air temperature is –5 °C.
Ambient air temperature for outdoor installations
Does not exceed +40 °C and its average over a period of 24 h does not exceed +35 °C.
The lower limit of the ambient air temperature is:
–25 °C in a temperate climate, and
–50 °C in an arctic climate.
© ABB Group August 18, 2009 | Slide 22
Service condition
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Atmospheric conditions
Atmospheric conditions for indoor installations
The air is clean and its relative humidity does not exceed 50 % at a maximum temperature of +40 °C. Higher relative humidity may be permitted at lower temperature, for example 90 % at +20 °C.
Atmospheric conditions for outdoor installations
The relative humidity may temporarily be as high as 100 % at a maximum temperature of +25 °C.
© ABB Group August 18, 2009 | Slide 23
Service condition
Pollution degree
Refers to the environmental conditions for which the ASSEMBLY is intended.
For switching devices and components inside an enclosure, the pollution degree of the environmental conditions in the enclosure is applicable.
© ABB Group August 18, 2009 | Slide 24
Service condition
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Pollution degree (cont’d) To evaluate clearances and creepage distances, the
following four degrees of pollution are established. Pollution degree 1
No pollution or only dry, non-conductive pollution occurs.
Pollution degree 2 Normally, only non-conductive pollution occurs.
Occasionally, however, a temporary conductivity caused by condensation may be expected.
Pollution degree 3 Conductive pollution occurs or dry, non-conductive
pollution occurs which becomes conductive due to condensation.
Pollution degree 4 The pollution generates persistent conductivity
caused, for instance, by conductive dust or by rain or snow.
© ABB Group August 18, 2009 | Slide 25
Service condition
Altitude
Site of installation does not exceed 2 000 m (6 600 ft).
Note: For electronic equipment to be used at altitudes above 1 000 m, it may be necessary to take into account the reduction of the dielectric strength and of the cooling effect of the air.
Electronic equipment intended to operate in these conditions should be designed or used in accordance with an agreement between manufacturer and user.
© ABB Group August 18, 2009 | Slide 26
Service condition
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Mechanical design
Materials capable of withstanding the mechanical, electrical and thermal stresses as well as the effects of humidity which are likely to be encountered in normal service.
Protection against corrosion shall be ensured by the use of suitable materials or by the application of equivalent protective coatings to the exposed surface, taking account of the intended conditions of use and maintenance.
All enclosures or partitions including locking means for doors, withdrawable parts etc., shall be of a mechanical strength sufficient to withstand the stresses to which they may be subjected in normal service.
The apparatus and circuits in the ASSEMBLY shall be so arranged as to facilitate their operation and maintenance, and at the same time to ensure the necessary degree of safety.
© ABB Group August 18, 2009 | Slide 27
Design & construction
Clearances, creepage distances and isolating distances
Clearances and creepage distances
Apparatus forming part of the ASSEMBLY shall have distances complying with the requirements of their relevant specifications, and these distances shall be maintained during normal service conditions.
When arranging apparatus within the ASSEMBLY, the specified creepage distances and clearances or impulse withstand voltages shall be complied with, taking into account the relevant service conditions.
For bare live conductors and terminations (e.g. busbars, connections between apparatus, cable lugs), the creepage distances and the clearances or impulse withstand voltages shall at least comply with those specified for the apparatus with which they are directly associated.
© ABB Group August 18, 2009 | Slide 28
Design & construction
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Clearances, creepage distances and isolating distances (cont’d)
In addition, abnormal conditions such as a short circuit shall not permanently reduce the clearances or dielectric strength between busbars and/or connections other than cables below the values specified for the apparatus with which they are directly associated.
Isolating distances on Withdrawable parts
In the case of functional units being mounted on withdrawable parts, the isolation provided shall at least comply with the requirements in the relevant specification for disconnectors with the equipment in new condition, taking account of the manufacturing tolerances and changes in dimensions due to wear.
© ABB Group August 18, 2009 | Slide 29
Design & construction
Dielectric properties Terminals for external conductors Enclosures and degree of protection Temperature rise Protection against electric shock Short-circuit protection and short-circuit withstand strength Switching devices and components installed in
ASSEMBLIES Internal separation of ASSEMBLIES by barriers or
partitions Electrical connections inside an ASSEMBLY: bars and
insulated conductors Requirements for electronic equipment supply circuits Electromagnetic compatibility (EMC) Description of the types of electrical connections of
functional units
© ABB Group August 18, 2009 | Slide 30
Design & construction
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© ABB Group August 18, 2009 | Slide 31
Switchboards Common problems
SwitchboardsWhat are the common problems?
Overheating
Fire
Electric shock
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How we react?
The usual way is to blame down the chain
Can we overcome it?
Yes
OverheatingWhat causes it?
Poor connection - Mitigation
There is proper tightening torque
Equipment
Value
Correct selection of termination
Regular checking
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OverheatingWhat causes it?
Under-size - Mitigation
Correct sizing for cable and busbar.
At termination oversize to have heat-sink effect.
Overdoing it results in costs increase
OverheatingWhat causes it?
Ventilations - Mitigation
Heat concentration
Chimney effect
Do not block it
Regular checking and cleaning
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OverheatingWhat causes it?
Harmonics - Mitigation
Know the load in advance
Filters
Have sufficient rating for the inductor.
Have capacitor that takes the over-voltage and the flame-retardant
Fire protection• The capacitor elements are surrounded by
vermiculite which is an inorganic, inert, fire-proof and non-toxic granular material. The vermiculite safely absorbs the energy produced within the capacitor box and extinguishes any possible flame.
Thermal equalizers• Thermal equalizers are fitted to surround each
capacitor element and provide effective heat dissipation. The CLMD capacitor is equipped with discharge resistors
High reliability• The CLMD capacitor complies with requirements to
IEC60831-1 & 2 and is UL listed.
Enclosed Capacitor UnitsCLMD
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OverheatingWhat causes it?
Poor connection
Under-size
Ventilations
Harmonics
FireWhat causes it?
Flammability of material
Source of ignition
Prolonged overheating
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Electric ShockWhat causes it?
Deterioration of insulation
Access to live parts
Explosion
Flashover
Testing and acceptance
Classification of tests in IEC 60439-1
– type tests
– routine tests
Practice of acceptance – in addition to standard
– Factory acceptance test - FAT
– Site acceptance test – SAT
– Operation and maintenance manual
– O & M
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© ABB Group August 18, 2009 | Slide 43
SwitchboardsTesting & acceptance
Type tests certificate….
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Testing and acceptance
Type tests to verify compliance with standard & carried out on a sample to be manufactured to the same or a similar design.
They shall be carried out on the initiative of the manufacturer.
Testing and acceptance
Routine tests on every production unit intended to detect faults in materials and workmanship.
a) Inspection
b) Dielectric test
c) Checking of protective circuit
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Testing and acceptance
Factory acceptance test
Materials and construction
Setting and verifying
Site acceptance test
Transportation damage
Setting, sealing, signed off
Operation and maintenance manual
Learning to use and maintenance
© ABB Group August 18, 2009 | Slide 48
SwitchboardsProtection against overvoltages
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overvoltage category a conventional number based on limiting (or controlling) the
values of prospective transient overvoltages occurring in a circuit (or within an electrical system having different nominal voltages) and depending upon the means employed to influence the overvoltages.
surge arrester a device designed to protect the electrical apparatus from high
transient overvoltages and to limit the duration and frequently the amplitude of the follow-on current
Overvoltage requirement for IEC 60439-1
Overvoltages Supply overvoltages are specified in figure 1. This figure applies to the non-periodic overvoltages as a deviation from
the rated peak value within the short-time range. The ASSEMBLIES shall be so designed that their service ability in the
case of overvoltages below the values represented by curve 1 is ensured.
If overvoltages occur within the range between curves 1 and 2, the operation may be interrupted by the response of protective devices safeguarding the ASSEMBLY, no damage to the ASSEMBLY being allowed to occur up to a peak value of the voltage equal to 2 Ui + 1 000 V.
Overvoltage requirement for IEC 60439-1
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Overvoltage requirement for IEC 60439-1
Temporary variations in voltage and frequencyThe equipment shall operate without damage when there are temporary variations in the following conditions. voltage drops not exceeding 15 % of rated voltage for periods not
longer than 0,5 s. supply frequency deviation of up to + 1% of rated frequency. the maximum admissible duration of an interruption of the supply
voltage for equipment shall be indicated by the manufacturer.
Overvoltage requirement for IEC 60439-1
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Overvoltage requirement for IEC 60439-1
400 V~ 230 V~ 230 V~ 60 V~6000 V
4000 V2500 V
1500 V
IV III II I
System voltageUimp
Category
Impulse withstand voltages
category to IEC 60364-4-44 ,
60439 and 60947.
Overvoltage requirement for IEC 60439-1
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Category IV
• Origin of installation
•overhead lines
•cable networks
•busbars
•cutouts
Category III
• Distribution circuit
• final circuit
•stationary installation
Category II
• Load level
•portable equipment
Category I• Special
equipment
• communi-cation equipment
• electronics
Location of SPD to IEC 60439-1
Category IV
• 6 kV
• 25 kA 10/350
• class 1
Category III
• 4 kV
• 10 kA 8/20
• class 2
Category II
• 2.5 kV
• 1.5 kA 8/20
• class 3
Category I
• 1.5 kV
Location of SPD to IEC 60439-1
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Increasing propagation of disturbance :
• interconnection and complexity of power and telecommunication networks.
• switching operations of power electronics.
Why to protect against overvoltage?
Decreasing robustness of equipment :
• sensitive electronic equipments
• telecommunication equipments
Why to protect against overvoltage?
Statistics from insurance shows high percentage of damage to electronics due to overvoltages
Damage to semiconductor device due to overvoltage
Loss of operation
Loss of service
Loss of data
Loss of production
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Lightning surge
Switching surge
Purpose of SPD
What is an overvoltage?
Enemy of SPD
Vrms230V 50Hz
8000V during 140µs8000V during 140µs
Transient overvoltage
460V during 10s460V during 10s
Temporary overvoltage
Lightning strikes direct lightning strike
Direct lightning strike on a lightning rod
Close lightning strike on aerial line
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T IM E
V A LU Ein kA
Lightning strikes 10/350 waveshape
(µµµµs)
50%
350µµµµs
Iimp
90%
10%
10µµµµs
10/350
10/350 wave shape
10/350 is used to testType 1
Inductive coupling Earth potential rise
Lightning strikes indirect lightning strike
Distant lightning strike on aerial line
+ switching
operations
• Capacitive and inductive equipments are switched on or off
• Fuse or breaker operations
• Power electronics
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Lightning strikes 8/20 waveshape
8/20 wave shape
TIME
VALUE
(µµµµs)
I
Imax
50%
20µµµµs
90%
10%
8µµµµs
8/20
8/20 is used to testType 2 and Type 3
Comparison of the energy
T IM E in us
V A LU Ein kA
10/350
8/20
10/350 energy >> 8/20 energy
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Data from Meteorage. Measurement campaign on 5.4Million strokes between 1995-2005
Amplitude of Lightning Strokes (kA)
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100 120 140 160 180 200
Amplitude of lightning strokes (kA)
Cum
ulat
ive
freq
uenc
y
40% of lightning strikes are higher than 20kA (or 60% of lightning strikes are below 20kA)
5 % of lightning strikes are higher than 60kA (or 95% of lightning strikes are below 60kA)
0.1 % of lightning strikes are higher than 200kA
Strike size and frequency
Cumulative frequency of lightning strikes –positive and negative- versus their amplitude.
200 kA
4××××8,3 kA
PE TVnetwork
water and gas pipespower network
10 Ω
100 kA
100 kA
33 kA33 kA
33 kA
Typical current sharing on direct strike (10/350)
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OVR … Over Voltage Range
IEC EN NFC VDE UL
CLASS A
TYPE I TYPE I CLASS B
TYPE II TYPE II “SPD” CLASS C
TYPE III TYPE III CLASS D “TVSS”
International Europe France Germany United states
Withstand of equipment
Overvoltage value due to lightning or switching : 500V to 200 000V
Equipments are divided into withstand categories :
Category IV : Industrial equipment, meters overvoltage < 6000V
Category III : Distribution panels, switchgear overvoltage < 4000V
Category II : Domestic electrical equipment overvoltage < 2500V.
Category I : Sensitive electronic circuits overvoltage < 1500V
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Level of protection = Up
SPDUp=1,2kV
UnetworkEquipment
UProtected
Iimp: OVR T1 25-255
T IM E
V A LU Ein kA
(µµµµs)
50%
350µµµµs
Iimp
90%
10%
10µµµµs
10/350
15kA 10/350Iimp
7kA 10/350
25kA 10/350
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Imax: OVR T2 40-275 s P TS
8/20 wave shape
TIME
VALUE
(µµµµs)
I
Imax
50%
20µµµµs
90%
10%
8µµµµs
8/20
40kA 8/20Imax
15kA 8/20
70kA 8/20
Type I+II / Combined SPD
OVR T1+2 25 255 TS OVR T1+2 7 275s P
Wave shape 10/350 10/350 & 8/20
Techno Spark Gap + MOV MOV
Iimp 25kA 7kA
Imax - 70kA
Up 1,5kV 1,5kV
Reason to call the SPD T1+2
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When the surge comes, the electronic will detect and
amplify it
At this stage, a little spark is
generated at the needle head
Once the surge is earthed, arc enters
in the arc chamber. this is
self extinguishingtime
Hot gas exit passing through
the exhaust channel that avoid
any fire risks
Little spark commutes the air gap, thus surge
energy is driven to ground
OVR T1 25-255
Type I+II / Combined SPD
© ABB Group August 18, 2009 | Slide 75
IEC 61439 seriesNow and the future
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Towards the future - IEC 61439
What would it be IEC 61439?
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Part 1 General rules
Part 2Power
switchgear & Controlgear Assemblies
Part 4Assemblies
for Construction
Sites
Part 5Assemblies for Power
Distribution
Part 3Distribution
Boards
Part 6Busbar trunking Systems
IEC 61439 – Structure
• IEC 61439 provides detail guidelines on how to
prove that assemblies derived from fully type-
tested assemblies comply with the new standard.
• IEC 60439 standard was not so easy to assess
whether partially type tested assemblies are
compliant.
• IEC 61439 standard will specify:
• by testing
• by calculations
• by design rules
New world standard
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IEC 60439 – Future classification – IEC 61439
Today, due to a lack of clarity of IEC 60439 there is wide
range of interpretations on:
• How to carry out the verification,
• What is the acceptance criteria, and
• How many required number of verifications on
different specimen.
Verification by
• Type test
• Calculation
• Design rules
IEC 60439 – Future classification – IEC 61439
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IEC 60439 – Future classification – IEC 61439
Previous ambiguities have been addressed, e.g. diversity, rating of circuits and substitution of devices.
The standard requires that the performance of every assembly is demonstrated at design and manufacturing stages by a combination of stringent and defined verification processes :–
• proving tests, • inspection, • design rules and/or calculation.
The new structure
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• Tests carried out on devices to their own product
standard do not need to be duplicated when installed in
an assembly.
• The new standard fully recognises the use of
switchboards assembled from kit systems in accordance
with the original manufacturer’s instructions.
• The verification process no longer recognizes the
classifications of TTA. and PTTA., alternative and
equivalent methods to type tests are included
The new structure
• Tests carried out on devices to their own product
standard do not need to be duplicated when installed in
an assembly.
• The new standard fully recognises the use of
switchboards assembled from kit systems in accordance
with the original manufacturer’s instructions.
• The verification process no longer recognizes the
classifications of TTA. and PTTA., alternative and
equivalent methods to type tests are included
The new structure
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ArTu K
The completely type tested assembly (TTA) and competitive solution
designed to be assembled by an Authorized Panel builder
In kit form
mainly for power distribution.
A pre-engineered product from to be assembled by Authorized Panel builder
Main characteristics
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Integrated range of structures up to 4000A with common accessories
Possibility of fullfilling all application requirements in terms of installation and degree of protection (IP31, IP41, IP42, IP65)
Maximum integration with the ABB Components
Segregations in kits up to Form 4
Main characteristics
ArTu complies with the CEI EN60439 Standards
ArTu has obtained ACAE/LOVAG & ASTA Certification
Production system certified ISO 9001 and ISO 14000
ArTu is in accordance with UL50 and UL891
Main characteristics
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Rated service voltage: up to 690VRated insulation voltage: up to 1000VRated impulse withstand voltage: 8KV
Dielectric properties (ref. para. 8.2.2 of the standard)
Temperature limits are within the limits specified in the standard and tested for rated current 4000A
Temperature rise (ref. para. 8.2.1 of the standard)
ArTu K Switchboards have undergone TTA tests foreseen by IEC 439-1 in the ABB & Falcon laboratories. The results guarantee the performance of ArTu K by using the structures and ABB SACE circuit breakers, therefore the assembler does not have to carry out any further type test by following the selection criteria and the assembly instruction for the various components
Compliance with IEC 60439-1 Standard
Rated short time short circuit current: 105 KA (1s) & 50 KA (3s)Rated max. Pick short circuit current: 254 KA
Short circuit withstand current (ref. para. 8.2.3 of the standard)
Protection circuit short circuit withstand current:Phase-earthing busbar: 60 KA (1s)
Short circuit efficiency (ref. para. 8.2.4 of the standard)
Main characteristics
Mechanical operation (ref. para. 8.2.6 of the standard)
Without door : IP 31Without door : IP 41With door: IP 65
Degree of protection (ref. para. 8.2.7 of the standard) & to IEC 529
Mechanical operation is verified by following the assembly and mounting instruction of the metal workstructures and ABB SACE circuit breaker
The insulation distances are guaranteed by following the ABB SACE assembly & mounting instructions, and those for ABB SACE circuit breakers
Insulation distances (ref. para. 8.2.5 of the standard)
Impact resistance IKStrong structure and tempered glass
Impact energy in Joules: 20.00
40c
m 5kg
ABB Declaration of conformity
We confirm that ArTu K has undergone all the above tests and declared TTA by ACAE-LOVAG certification authority
Main characteristics
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ArTu K Modular Switchboards
Distribution Systems
A complete system:
Busbars with shaped section up to 3200A
Flat Drilled Busbars up to 4000A
Compliance to IEC60439-1
Simple to assemble
ArTu K Modular Switchboards
Rapid coupling
Advantages of the Busbar Systems
Easy & fast in mounting
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ArTu Distribution Switchboards
Segregations
ArTu is available with or without segregations
Comply with IEC 60439-1
Segregation Compartments available as:- Form 2- Form 3A and 3B- Form 4
Simple kit to convert from Form 3 to Form 4 Form 4 available both for MCCBs and ACBS Maintenance without Service Interruption
IEC 61439 – the new standard for low-voltage
switchgear and controlgear assemblies – was
issued Jan 2009.
One of the main improvements is that the
definition of fully Type Tested Assemblies (TTA)
and Partially Type Tested Assemblies (PTTA)
have been removed from the standard.
New world standard
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IEC 61439 provides detail guidelines on how to
prove that assemblies derived from fully type-
tested assemblies comply with the new standard.
IEC 60439 standard was not so easy to assess
whether partially type tested assemblies are
compliant.
IEC 61439 standard will specify:
by testing
by calculations
by design rules
New world standard
If we have existing products that have already
been tested properly, this will not affect your IEC
60439 certification.
Tendency to provide more proof that their
product families follow the correct design
guidelines and rules to comply with IEC 61439.
It is no longer acceptable to provide an assembly
without a full design being fully proven.
It is difficult to make substitutions of one
component or product for another without
stringent assurances
How it affects us?
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Certification and acceptance of products from IEC 60439 to
IEC 61439.
Moving our MS to IEC 61439
It is no longer acceptable to provide an assembly without a
full design being fully proven.
It is difficult to make substitutions of one component or
product for another without stringent assurances.
How it affects us?
Smissline
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© ABB Group August 18, 2009 | Slide 102