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