Siemens SENTRON 3WL10 - Default Chapter; Table of Contents

3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
3
Table of contents
1 Introduction ............................................................................................................................................. 9
1.1 About this documentation ......................................................................................................... 9
1.2 Product-specific information ..................................................................................................... 9
1.3 Reference documents ............................................................................................................. 10
1.4 Advanced training courses ..................................................................................................... 11
1.5 Safety instructions ................................................................................................................... 11
2 Description ............................................................................................................................................ 15
2.1 Current-carrying 3WL10 circuit breakers ................................................................................ 15
2.2 Current-limiting 3VA27 molded case circuit breakers ............................................................. 15
2.3 Advantages of the platform approach ..................................................................................... 15
2.4 Overview - applications and portfolio ...................................................................................... 16
2.5 Basic properties of the circuit breaker (3WL10 / 3VA27) ........................................................ 16
2.6 Possible uses and portfolio ..................................................................................................... 21
2.6.1 Portfolio of 3WL10 air circuit breakers .................................................................................... 23
2.6.2 Portfolio of 3VA27 molded case circuit breakers .................................................................... 24
2.6.3 Electronic trip unit (ETU) ......................................................................................................... 25
2.6.4 3VA27 / 3WL10 for motor protection applications .................................................................. 26
2.7 Basic unit ................................................................................................................................ 31
2.7.1 Product and mounting versions .............................................................................................. 31
2.7.2 Design of the circuit breaker ................................................................................................... 32
2.7.3 Withdrawable breaker ............................................................................................................. 33
2.7.4 Technical overview ................................................................................................................. 36
2.7.5 Circuit breaker identification ................................................................................................... 43
2.8 Electronic trip unit ETU ........................................................................................................... 46
2.8.1 Description of functions........................................................................................................... 47
2.8.2 Selectivity ................................................................................................................................ 49
2.8.3 Design of the electronic trip units ............................................................................................ 52
2.8.3.1 Electronic trip units of the 3-series .......................................................................................... 52
2.8.3.2 Electronic trip units of the 6-series .......................................................................................... 53
2.8.4 Characteristics of the ETU ...................................................................................................... 55
2.8.4.1 Characteristic curves ..............................................................................................................
66
2.8.4.2 Features and options .............................................................................................................. 69
2.8.5 Parameters of the trip units ..................................................................................................... 72
2.8.5.1 Metering functions ................................................................................................................... 81
2.9 Communication ....................................................................................................................... 85
2.10 Accessories overview ............................................................................................................. 89