From Iec 60439 To Iec 61439

Low Voltage Systems Newsletter
The Low Voltage Switchgear & Controlgear
Assembly standards
The move from IEC 60439-X to 61439-X
Schneider Electric East Mediterranean Low Voltage Systems Newsletter Issue #1 - April 2011
www.eastmed.schneider-electric.com
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Content
The International ASSEMBLY Standards ................................... 2
From IEC 60439-1 to IEC 61439-1&2
Why a New Standard?....................................................................... 3 Clear Definitions of Roles ............................................................... 3 Elimination of TTA and PTTA Concepts .................................... 3 Clarified & Reinforced Requirements ......................................... 5
Strength of materials and parts
Overview of the Design Verifications ......................................... 5

(according to IEC 61439-2, in order of appearance)
Overview of the Routine Verifications ....................................... 6
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The International ASSEMBLY Standards

From IEC 60439-1 to IEC 61439-1&2
OLD IEC 60439-X LV switchgear & controlgear Assemblies (ASSEMBLIES) Power switchgear and controlgear assemblies TTA and PTTA (Also used as a general rules standard) 60439-1 Busbar Trunkings Systems 60439-2 Distribution Boards for unskilled pers. 60439-3 ASSEMLIES for construction sites 60439-4 ASSEMBLIES for public networks 60439-5
NEW IEC 61439-X LV switchgear & controlgear Assemblies (ASSEMBLIES)
General rules 61439-1 (2009) Power switchgear and controlgear assemblies 61439-2 (2009) Distribution Boards for Ordinary pers. 61439-3 ASSEMLIES for construction sites 61439-4 ASSEMBLIES for public networks 61439-5 Busbar Trunkings Systems 61439-6
IEC 61439-2 is to be read in conjunction with IEC 61439-1, instead of IEC 60439-1 alone Structure aligned with Standard for protection devices IEC60947 Tests identical to those in IEC 60439-1 do not need to be repeat
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IEC61439-1 & 2 Standard
Why a New Standard?

80%
Requirements not always clear Role of Switchboard System manufacturer and Panel Builder not clear enough
of the ASSEMBLIES worldwide do not comply with the standard concept abused and misused
A Partially Type Tested ASSEMBLY (PTTA)
Original Manufacturer (Switchboard System manufacturer) and ASSEMBLY Manufacturer (Panel Builder) PTTA/TTA concepts replaced with (tested) ASSEMBLY
Recognition of Clarified & reinforced requirements
Main Changes
Clear Definitions of Roles

ASSEMBLY Manufacturer (Panel Builder) Original Manufacturer (System manufacturer)
Carries out the original design Carries out the design verifications that can be certified through a certification body (ASEFA, ASTA, KEMA,) Takes the responsibility for the final Assembly Carries out routine verifications
Specier Certication body Project Specication
ASSEMBLY System
Original Manufacturer
Assembly system
Assembly Manufacturer (Panel Builder)
Specifier (design office, End user,)

Specifies or selects the ASSEMBLY
Full range of mechanical & electrical components (functional units, switching devices, enclosures) designed by the Original Manufacturer to be assembled according to his instructions
Tested assembly
User
Elimination of TTA and PTTA concepts

Type Tested Assemblies Tested ASSEMBLIES Partially Type Tested Assemblies TTA Design verifications
7 type tests on the design 3 routine tests on the realization of each panel
Mainly type-tests Or possibility for only some of the verifications under clear and strict conditions to do Comparison with a tested reference design (Design Rules) Calculations including safety margins
PTTA
Calculations not clearly defined to justify not to do some type-tests 3 same routine tests
Routine verifications
Same as TTA in 10 items instead of 3
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IEC61439-1 & 2 Standard
No.
Characteristic to be verified
Verification options available Clauses or Subclauses Verification Verification Verification by testing by calculation by design rules
Strength of Material and Parts:

Resistance to corrosion
10.2
10.2.2 10.2.3 10.2.3.1 10.2.3.2 10.2.3.3 Yes Yes Yes No No No No No No Yes No No
Properties of Insulating Materials:

Thermal stability Resistance of insulating Materials to normal heat Resistance to abnormal heat and fire due to internal electric effects
2 3 4
Resistance to ultra-violet (UV) radiation Lifting Mechanical impact Marking Degree of Protection of Enclosures Clearance and Creepage Distances Protection against electric shock and integrity of protective circuits:
10.2.4 10.2.5 10.2.6 10.2.7 10.3 10.4 10.5
Yes Yes Yes Yes Yes Yes
No No No No No Yes
No No No No Yes Yes
Effective continuity between the exposed conductive parts of the ASSEMBLY and the 10.5.2 protective circuit Effectiveness of the assembly for external faults 10.5.3
Yes Yes
No Yes
No Yes
5 6 7 8
Incorporation of switching devices and Components Internal electrical circuits and connections Terminal for external conductors Dielectric properties:
Power-frequency withstand voltage Impulse withstand voltage
10.6 10.7 10.8 10.9

10.9.2 10.9.3
No No No
Yes Yes
No No No
No
Yes Yes Yes

No Yes
9 10 11 12
Temperature-rise limits Short-circuit withstand strength Electromagnetic compatibility (EMC) Mechanical operation
10.10 10.11 10.12 10.13
Yes Yes Yes Yes
Yes Yes No No
Yes Yes Yes No
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Clarified & Reinforced Requirements:

Strength of materials and parts
Following
This looks at the suitability of plastic and metal parts to prove the long term capabilities of the equipment.
tests are compulsory
Resistance to corrosion Properties of insulating materials Thermal stability Resistance of insulating materials to normal heat Resistance to abnormal heat and fire due to internal electric effects Resistance to ultra-violet (UV) radiation Lifting Mechanical impact (IK) Marking
Current carrying All the tests (also short circuit) have to be made with the devices inside the assembly
No more possibility to make a temperature rise with a heating resistance No device substitution for each circuit alone to its rated current and the complete assembly (including diversity factor) maximum 1600A and all components de-rated to 80%
The tests have to be made
The verification by calculation is limited
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Overview of The Design Verifications

(according to IEC 61439-2, in order of appearance)
Construction
Resistance to corrosion Thermal stability of insulating materials (dry heat test) (a new ball pressure test will be withdrawn from Edition 2) Resistance to abnormal heat due to internal electric effects (glow-wire test) (8) UV radiation test (outdoor ASSEMBLIES only) Lifting test IK test, where specified Marking Degree of protection of enclosures (7) Clearances (higher minimums) and creepage distances (5) Continuity between exposed conductive parts and the protective circuit (4.1) Effectiveness of the protective circuit for external faults (4.2) Incorporation of switching devices and components Internal circuits and connections Terminals for external conductors
Performance
Power-frequency voltage test (2) (complying with IEC60947) Impulse withstand voltage test (no more optional) Temperature rise limits (1) Short-circuit withstand strength (3) Electro-Magnetic Compatibility (9) Mechanical operation (6) (200 operating cycles instead of 50)
NOTE
(1) to (7) show the 7 type-tests according to table 7 of IEC 60439-1 (items 1 to 7) (8) and (9) were also required but not in table 7
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Overview of The Routine Verifications

Routine Verification
Degree of protection of enclosures Clearances
Visual inspection
X X
Tests
or measurement if specified values (in 1st Ed (2009) of IEC 61439 -1 these values are 1,5 times the values in Ed 2 to be published in 2011 (and in IEC 60439- 1) or impulse withstand voltage test or measurement if visual inspection not applicable Random verification of tightness of the connections of protective circuit
Creepage distances Protection against electric shock and integrity of protective circuits Incorporation of built-in components Internal electrical circuits and connections Terminals for external conductors Mechanical operation Dielectric properties Wiring, operational performance and function
X X X X
Or Random verification of tightness Number, type and identification of terminals
effectiveness of mechanical actuating elements locks and interlocks, including those associated with removable parts Power-frequency dielectric test or verification of insulating resistance (with incoming up to 250A only) Verification of completeness of information & markings, inspection of wiring and Function test where relevant
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To find out more: www.eastmed.schneider-electric.com
Ashadia Building, 10th Floor, Tabaris, Achrafieh P.O. Box : 166223 - Beirut, Lebanon Tel. +961 1 204 502 Fax +961 1 204 458
Schneider Electric East Mediterranean s.a.l.
Cyprus Iraq Jordan Syria
+ 357 24 812 649 customercare.cy@schneider-electric.com + 962 6 516 6260 customercare.iq@schneider-electric.com + 962 6 516 6465 customercare.jo@schneider-electric.com customercare.lb@schneider-electric.com + 963 11 6124799 customercare.sy@schneider-electric.com
Lebanon + 961 1 321 645
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Low Voltage Systems Newsletter

The Low Voltage Switchgear & Controlgear

Low Voltage Systems Newsletter

Overview of the Design Verifications ......................................... 5

Overview of the Routine Verifications ....................................... 6

Low Voltage Systems Newsletter

The International ASSEMBLY Standards

NEW IEC 61439-X LV switchgear & controlgear Assemblies (ASSEMBLIES)

IEC61439-1 & 2 Standard

Low Voltage Systems Newsletter

Why a New Standard?

A Partially Type Tested ASSEMBLY (PTTA)

Clear Definitions of Roles

Assembly Manufacturer (Panel Builder)

Specifier (design office, End user,)

Elimination of TTA and PTTA concepts

Same as TTA in 10 items instead of 3

IEC61439-1 & 2 Standard

Low Voltage Systems Newsletter

Strength of Material and Parts:

Properties of Insulating Materials:

10.2.4 10.2.5 10.2.6 10.2.7 10.3 10.4 10.5

Yes Yes Yes Yes Yes Yes

10.6 10.7 10.8 10.9

Yes Yes Yes

10.10 10.11 10.12 10.13

Yes Yes Yes Yes

Yes Yes Yes No

Low Voltage Systems Newsletter

Clarified & Reinforced Requirements:

tests are compulsory

The tests have to be made

The verification by calculation is limited

Low Voltage Systems Newsletter

Overview of The Design Verifications

Low Voltage Systems Newsletter

Overview of The Routine Verifications

Or Random verification of tightness Number, type and identification of terminals

Become A Champion of Energy Efficiency.

Low Voltage Systems Newsletter

Energy University courses are:

Low Voltage Systems Newsletter

To find out more: www.eastmed.schneider-electric.com

Schneider Electric East Mediterranean s.a.l.

Cyprus Iraq Jordan Syria

Lebanon + 961 1 321 645

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