from iec 60439 to iec 61439

www.eastmed.schneider-electric.com

Low Voltage Systems Newsletter

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The Low Voltage Switchgear & Controlgear

Assembly standardsThe move from IEC 60439-X to 61439-X

Schneider Electric East MediterraneanLow Voltage Systems Newsletter Issue #1 - April 2011


> 1www.eastmed.schneider-electric.com


Content

The International ASSEMBLY Standards ................................... 2From 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 ......................................... 5Strength 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 StandardsFrom IEC 60439-1 to IEC 61439-1&2

OLD IEC 60439-XLV switchgear& controlgearAssemblies(ASSEMBLIES)

NEW IEC 61439-XLV switchgear& controlgearAssemblies(ASSEMBLIES)

Power switchgear and controlgear assembliesTTA and PTTA (Also used as a general rules standard) 60439-1

General rules61439-1 (2009)

Power switchgearand controlgear

assemblies61439-2 (2009)

Busbar Trunkings Systems 60439-2

ASSEMLIESfor construction

sites60439-4

Distribution Boards for

unskilled pers.60439-3

ASSEMBLIESfor publicnetworks60439-5

ASSEMLIESfor construction

sites61439-4

DistributionBoards for

Ordinary pers.61439-3

ASSEMBLIESfor publicnetworks61439-5

BusbarTrunkingsSystems61439-6

• 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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Why a New Standard?• 80% of the ASSEMBLIES worldwide do not comply with the standard • Requirements not always clear • Role of Switchboard System manufacturer and Panel Builder not clear enough

• A Partially Type Tested ASSEMBLY (PTTA) concept abused and misused

Main Changes• Recognition of Original Manufacturer (Switchboard System manufacturer)

and ASSEMBLY Manufacturer (Panel Builder)

• PTTA/TTA concepts replaced with (tested) ASSEMBLY• Clarified & reinforced requirements

IEC61439-1 & 2 Standard

Clear Definitions of Roles• ASSEMBLY Manufacturer (Panel Builder) • Takes the responsibility for the final Assembly • Carries out routine verifications• 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,…)

• ASSEMBLY System• Full range of mechanical & electrical components(functional units, switching devices, enclosures…) designed by the Original Manufacturer to be assembled according to his instructions

• Specifier (design office, End user,…)• Specifies or selects the ASSEMBLY

OriginalAssembly

Manufacturer(Panel Builder)Manufacturer

Specifier

Project Specification

Assemblysystem

Tested assembly

User

Certificationbody

Elimination of TTA and PTTA concepts

Design verifications• Mainly type-tests• Or possibility for only some of the verifications under clear and strictconditions to do • Comparison with a tested reference design (Design Rules) • Calculations including safety margins

Routine verifications• Same as TTA in 10 items instead of 3

Tested ASSEMBLIES

TTA• 7 type tests on the design• 3 routine tests on the realization of each panel

Type Tested Assemblies

Partially Type Tested Assemblies

PTTA• Calculations not clearly defined to justify not to do some type-tests• 3 same routine tests



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IEC61439-1 & 2 Standard

No. Characteristic to be verifiedClauses or Subclauses

Verification options available

Verification by testing

Verification by calculation

Verification by design rules

1 Strength of Material and Parts: 10.2Resistance to corrosion 10.2.2 Yes No No

Properties of Insulating Materials: 10.2.3

Thermal stability 10.2.3.1 Yes No No

Resistance of insulatingMaterials to normal heat

10.2.3.2 Yes No No

Resistance to abnormal heat and fire due to internal electric effects

10.2.3.3 Yes No No

Resistance to ultra-violet (UV) radiation 10.2.4 Yes No No

Lifting 10.2.5 Yes No No

Mechanical impact 10.2.6 Yes No No

Marking 10.2.7 Yes No No2 Degree of Protection of Enclosures 10.3 Yes No Yes3 Clearance and Creepage Distances 10.4 Yes Yes Yes4 Protection against electric shock

and integrity of protective circuits:10.5

Effective continuity between the exposed conductive parts of the ASSEMBLY and the protective circuit

10.5.2 Yes No No

Effectiveness of the assembly for external faults 10.5.3 Yes Yes Yes

5 Incorporation of switching devices and Components

10.6 No No Yes

6 Internal electrical circuits and connections 10.7 No No Yes7 Terminal for external conductors 10.8 No No Yes8 Dielectric properties: 10.9

Power-frequency withstand voltage 10.9.2 Yes No No

Impulse withstand voltage 10.9.3 Yes Yes

9 Temperature-rise limits 10.10 Yes Yes Yes10 Short-circuit withstand strength 10.11 Yes Yes Yes11 Electromagnetic compatibility (EMC) 10.12 Yes No Yes12 Mechanical operation 10.13 Yes No No



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Clarified & Reinforced Requirements:Strength of materials and parts

• Following tests are compulsoryThis looks at the suitability of plastic and metal parts to prove the long term capabilities of the equipment. • 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

• The tests have to be made • for each circuit alone to its rated current • and the complete assembly (including diversity factor)

• The verification by calculation is limited • maximum 1600A and all components de-rated to 80%



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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 VerificationsRoutine Verification Visual inspection Tests

Degree of protection of enclosures X

Clearances X 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

Creepage distances X or measurement if visual inspection not applicable

Protection against electric shock and integrity of protective circuits

X Random verification of tightness of the connections of protective circuit

Incorporation of built-in components X

Internal electrical circuits and connections X Or Random verification of tightness

Terminals for external conductors Number, type and identification of terminals

Mechanical operation X effectiveness of mechanical actuating elements locks and interlocks, including those associated with removable parts

Dielectric properties Power-frequency dielectric test or verification of insulating resistance (with incoming up to 250A only)

Wiring, operational performance and function X Verification of completeness of information & markings, inspection of wiring and Function test where relevant



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Schneider Electric East Mediterranean s.a.l.Ashadia Building, 10th Floor, Tabaris, AchrafiehP.O. Box : 166223 - Beirut, LebanonTel. +961 1 204 502Fax +961 1 204 458www.eastmed.schneider-electric.com

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