Table of contents
3VL IEC molded case circuit breakers
6 System Manual, 11/2013, 110 0110 - 02 DS 03
5 Application planning .............................................................................................................................. 57
5.1 Use with frequency converters .................................................................................................... 57
5.2 Use of capacitor banks ................................................................................................................ 58
5.3 Transformer protection on the primary side ................................................................................ 59
5.4 Use in DC systems ...................................................................................................................... 60
5.5 Use in IT systems ........................................................................................................................ 62
5.6 Use in motor protection ............................................................................................................... 64
5.7 Use in unusual environments: ..................................................................................................... 67
5.8 Use in series connection ............................................................................................................. 69
5.9 Use in transfer control system .................................................................................................... 71
5.10 Use in communication environment ............................................................................................ 74
6 Installing/mounting ................................................................................................................................ 77
6.1 Installation methods .................................................................................................................... 77
6.2 Mounting and safety clearances ................................................................................................. 80
6.3 Locking devices ........................................................................................................................... 84
6.3.1 Locking devices for a padlock ..................................................................................................... 84
6.3.2 Locking device with a safety lock ................................................................................................ 86
6.3.3 Mutual interlocking of two molded case circuit breakers ............................................................ 86
7 Connecting ........................................................................................................................................... 89
7.1 Cables and busbars .................................................................................................................... 89
7.2 Main connection types for fixed mounting ................................................................................... 99
7.3 Main connection methods for plug-in and withdrawable version .............................................. 106
8 Displays and operator controls ............................................................................................................. 109
8.1 Overcurrent trip unit without LCD display ................................................................................. 109
8.2 Overcurrent trip unit with LCD display ...................................................................................... 114
9 Parameter assignment / addressing ..................................................................................................... 119
9.1 Setting the parameters .............................................................................................................. 119
9.2 Setting the protection parameters for motor protection (ETU10M, ETU30M and LCD-ETU
40M) .......................................................................................................................................... 123
10 Service and maintenance ..................................................................................................................... 125
10.1 Preventive measures ................................................................................................................ 125
10.2 Troubleshooting ........................................................................................................................ 127
11 Technical data ..................................................................................................................................... 129
11.1 General data - 3VL molded case circuit breakers ..................................................................... 129
11.2 Technical overview .................................................................................................................... 132
11.3 Configuration of main connections ............................................................................................ 136
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