Table of contents
1
Introduction ............................................................................................................................................. 9
1.1
About this documentation ......................................................................................................... 9
1.2
1.3
Reference documents ............................................................................................................. 10
1.4
Advanced training courses ..................................................................................................... 11
1.5
Safety instructions ................................................................................................................... 11
2
Description ............................................................................................................................................ 15
2.1
2.2
2.3
2.4
2.5
2.6
2.6.1
2.6.2
2.6.3
Electronic trip unit (ETU) ......................................................................................................... 25
2.6.4
2.7
Basic unit ................................................................................................................................ 31
2.7.1
2.7.2
2.7.3
Withdrawable breaker ............................................................................................................. 33
2.7.4
Technical overview ................................................................................................................. 36
2.7.5
2.8
Electronic trip unit ETU ........................................................................................................... 46
2.8.1
Description of functions........................................................................................................... 47
2.8.2
Selectivity ................................................................................................................................ 49
2.8.3
2.8.3.1
2.8.3.2
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
2.8.5.1
Metering functions ................................................................................................................... 81
2.9
Communication ....................................................................................................................... 85
2.10
Accessories overview ............................................................................................................. 89
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
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