Siemens SENTRON 3WA1 - Table of Contents

3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
3
Table of contents
1 Introduction ........................................................................................................................................ 17
1.1 Scope of validity of this document ............................................................................................... 17
1.2 Target readers of this documentation ......................................................................................... 17
1.3 Technical Support ............................................................................................................................ 17
1.4 Reference documents ..................................................................................................................... 18
1.5 Advanced training courses ............................................................................................................. 18
1.6 Safety instructions ........................................................................................................................... 19
1.6.1 Security information ........................................................................................................................ 20
1.6.2 Open Source Software .................................................................................................................... 20
1.6.3 More information on Open Source software for 3WA circuit breakers ................................. 21
1.7 Standards ........................................................................................................................................... 22
1.8 Abbreviations .................................................................................................................................... 22
2 Description.......................................................................................................................................... 23
2.1 Overview - applications and portfolio .......................................................................................... 23
2.1.1 Properties........................................................................................................................................... 23
2.1.2 Portfolio of the 3WA1 circuit breaker ........................................................................................... 25
2.1.3 Advantages ........................................................................................................................................ 26
2.2 Circuit breakers and non-automatic circuit breakers ............................................................... 27
2.2.1 Distinction between circuit breakers and non-automatic circuit breakers .......................... 27
2.2.2 Design ................................................................................................................................................. 28
2.2.2.1 Circuit breakers ................................................................................................................................ 28
2.2.2.2 Guide frame ....................................................................................................................................... 29
2.2.2.3 Secondary disconnect terminals ................................................................................................... 34
2.2.3 Circuit breaker identification .........................................................................................................
36
2.2.3.1 Rating und accessory labels of circuit breaker .......................................................................... 36
2.2.3.2 Guide frame rating label ................................................................................................................. 38
2.2.4 Operation ........................................................................................................................................... 39
2.2.4.1 Charging the stored-energy spring ............................................................................................... 39
2.2.4.2 Closing and opening ........................................................................................................................ 40
2.2.4.3 Racking the circuit breaker in the guide frame .......................................................................... 42
2.2.4.4 Commissioning checklist ................................................................................................................ 43
2.3 Protection system ............................................................................................................................ 45
2.3.1 General description of function ..................................................................................................... 45
2.3.2 Option plug ........................................................................................................................................ 46
2.3.3 Guideline for setting the protection parameters ....................................................................... 48
2.3.4 Time-current characteristic ........................................................................................................... 48
2.3.5 Description of the protective functions ....................................................................................... 50
2.3.5.1 General description .......................................................................................................................... 50
2.3.5.2 Long time LT ..................................................................................................................................... 50
2.3.5.3 Short time ST .................................................................................................................................... 54