Size 3 .................................................................................................................................................502

6.3.4.1

Basic data .........................................................................................................................................502

6.3.4.2

Breaking capacity ...........................................................................................................................503

6.3.4.3

Ampacity, power loss .....................................................................................................................504

6.3.4.4

Switching times, endurance (operating cycles) .......................................................................504

6.3.4.5

Minimum cross-sections of main conductors ...........................................................................506

6.3.5

Connection options for auxiliary conductor plug-in system...................................................506

6.4

Ambient conditions .........................................................................................................................507

6.5

Installation altitudes.......................................................................................................................508

6.6

Standards .........................................................................................................................................508

6.7

Approvals ..........................................................................................................................................509

6.8

Failure probability acc. to B10 and B10d ...................................................................................510

6.9

Electromagnetic compatibility ......................................................................................................514

Integration in power distribution equipment ................................................................................. 515

7.1

Compact design...............................................................................................................................515

7.2

Influencing factors ..........................................................................................................................516

7.3

Derating in the power distribution equipment ..........................................................................517

7.3.1

Overview ...........................................................................................................................................517

7.3.2

Derating 3WA11 ..............................................................................................................................517

7.3.3

Derating 3WA12 ..............................................................................................................................522

7.3.4

Derating 3WA13 ..............................................................................................................................524

7.4

Requirement according to IEC 61439 .........................................................................................526

7.4.1

Standard IEC 61439 ........................................................................................................................526

7.4.2

Simplified integration .....................................................................................................................527

7.4.2.1

Structural integration in power distribution equipment..........................................................527

7.4.2.2

Using 3WA circuit breakers in 3WL guide frames....................................................................528

7.4.2.3

Retrofit: Simple replaceability in existing power distribution equipment ...........................529

7.4.2.4

Checklist for replacing 3WL with 3WA circuit breaker according to IEC 61439-2 ............535

7.5

Phase barriers and horizontal partitions ....................................................................................537

7.6

Insulation test of the power distribution equipment ...............................................................539

7.7

Main connection..............................................................................................................................540

Troubleshooting ............................................................................................................................... 541

8.1

Troubleshooting for circuit breaker.............................................................................................541

8.2

Troubleshooting for the ETU600 electronic trip unit ...............................................................543

8.3

Troubleshooting for COM150 / COM 190 communications module ....................................547

Disposal ............................................................................................................................................ 549

9.1

End of maximum service life ........................................................................................................549

9.2

Disposal of low-voltage circuit breakers....................................................................................549

9.3

Disposal of waste electronic equipment ....................................................................................549

3WA1 air circuit breaker

Equipment Manual, 02/2023, 92310000002-06

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