Table of contents
3WA1 air circuit breaker
4 Equipment Manual, 02/2023, 92310000002-06
2.3.5.4 Instantaneous short-circuit protection INST .............................................................................. 55
2.3.5.5 Neutral protection N......................................................................................................................... 56
2.3.5.6 Ground-fault alarm ........................................................................................................................... 57
2.3.5.7 Ground-fault protection GF ............................................................................................................ 58
2.3.5.8 Ground-fault protection GF Hi-Z ................................................................................................... 61
2.3.5.9 Directional short time dST .............................................................................................................. 64
2.3.5.10 Reverse power protection RP ......................................................................................................... 66
2.3.5.11 Enhanced protective functions EPF .............................................................................................. 67
2.3.6 Tolerances for protection functions .............................................................................................. 68
2.3.7 DAS+ maintenance mode ............................................................................................................... 72
2.3.8 Activation limits and power supply ............................................................................................... 76
2.4 ETU300 electronic trip unit ............................................................................................................. 77
2.4.1 Overview of variants ......................................................................................................................... 77
2.4.2 Operator controls and displays ...................................................................................................... 78
2.4.2.1 Overview ............................................................................................................................................. 78
2.4.2.2 Operating keys................................................................................................................................... 79
2.4.2.3 LED displays ...................................................................................................................................... 79
2.4.2.4 Rotary coding switches .................................................................................................................... 81
2.4.3 Interfaces............................................................................................................................................ 81
2.4.3.1 Interface for external voltage supply via the TD400.................................................................. 81
2.4.3.2 Digital input and output ................................................................................................................... 82
2.4.3.3 External current sensor ................................................................................................................... 83
2.4.3.4 Rear interfaces ..................................................................................................................................
84
2.4.4 Protection parameters ..................................................................................................................... 84
2.4.4.1 Introduction ........................................................................................................................................ 84
2.4.4.2 Setting range...................................................................................................................................... 85
2.4.4.3 Parameter DAS+ maintenance mode ........................................................................................... 86
2.4.5 DAS+ maintenance mode ............................................................................................................... 86
2.5 Electronic trip unit ETU600 ............................................................................................................. 87
2.5.1 Overview of variants ......................................................................................................................... 87
2.5.2 Operator controls, displays and voltage tap module ................................................................. 88
2.5.2.1 Overview ............................................................................................................................................. 88
2.5.2.2 Display and operating keys F1 to F4 ............................................................................................ 89
2.5.2.3 LED displays ...................................................................................................................................... 89
2.5.2.4 Rotary switch ..................................................................................................................................... 91
2.5.2.5 Voltage tap module .......................................................................................................................... 91
2.5.3 Display and menu structure ........................................................................................................... 93
2.5.3.1 Operating philosophy ....................................................................................................................... 93
2.5.3.2 Menu structure .................................................................................................................................. 95
2.5.3.3 Start screen ........................................................................................................................................ 96
2.5.3.4 Display after a trip ............................................................................................................................ 99
2.5.3.5 Display in case of a warning.........................................................................................................101
2.5.3.6 Display of an error message .........................................................................................................102
2.5.4 Interfaces..........................................................................................................................................103
2.5.4.1 Bluetooth and USB-C interface ...................................................................................................103
2.5.4.2 Digital input and output .................................................................................................................107
2.5.4.3 Digital output for ground-fault alarm REF .................................................................................
109
2.5.4.4 External current sensors ...............................................................................................................110
2.5.4.5 Battery ...............................................................................................................................................111
2.5.4.6 Rear interfaces ................................................................................................................................112
2.5.5 Protection parameters ...................................................................................................................113
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