Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
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Manual, 10/2018, L1V30499596002-01
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Accessories .......................................................................................................................................... 91
3.1
Accessories for connection and insulation ............................................................................. 93
3.1.1
Insulating measures ............................................................................................................... 93
3.1.2
Connections of the fixed breaker version .............................................................................. 95
3.1.3
Connections of the withdrawable breaker version ................................................................. 97
3.2
Electromechanical accessories .............................................................................................. 99
3.2.1
Auxiliary releases for 3VA27 / 3WL10 ................................................................................... 99
3.2.2
Accessories for circuit breakers ........................................................................................... 102
3.2.3
Auxiliary, alarm, and signaling switches .............................................................................. 105
3.3
Accessories for communication link, remote switching, and I/O modules ........................... 111
3.4
Rotary operators .................................................................................................................. 114
3.4.1
Door mounted rotary operator .............................................................................................. 114
3.4.2
Front mounted rotary operator ............................................................................................. 116
3.5
External accessories ............................................................................................................ 117
3.5.1
External digital I/O module IOM300 ..................................................................................... 117
3.5.2
DSP800 display.................................................................................................................... 118
3.5.3
External current transformers .............................................................................................. 119
3.5.3.1
Rogowski CT solo external neutral ...................................................................................... 119
3.5.3.2
External CT for grounding conductors of the main power supply (grounded transformer
star point) G_ret using the ground fault return ..................................................................... 120
3.5.3.3
Summation current transformer Rc CT ................................................................................ 120
3.5.4
Locking and interlocking ...................................................................................................... 121
3.5.5
Support for floor fixation (fixed breaker) .............................................................................. 130
3.6
Breaker Data Adapters and test devices ............................................................................. 131
3.6.1
Overview .............................................................................................................................. 131
3.6.2
TD310 Activation & Trip Box ................................................................................................ 132
3.6.3
TD410 Breaker Data Adapter .............................................................................................. 133
3.6.4
TD420 test device ................................................................................................................ 134
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Application planning ............................................................................................................................. 137
4.1
Types of installation and installation locations ..................................................................... 137
4.1.1
Mounting position ................................................................................................................. 138
4.1.2
Degree of protection ............................................................................................................ 140
4.1.3
Power loss ............................................................................................................................ 141
4.1.4
Ambient conditions ............................................................................................................... 141
4.1.5
Current reduction ................................................................................................................. 142
4.1.5.1
Current reduction depending on the ambient temperature on the 3WL10 .......................... 142
4.1.5.2
Current reduction depending on the ambient temperature on the 3VA27 ........................... 143
4.1.6
Use in IT systems................................................................................................................. 146
4.1.7
Electromagnetic compatibility .............................................................................................. 147
4.1.8
Installation in the switchboard .............................................................................................. 147
4.2
Power supply, grounding, and connection ........................................................................... 150
4.2.1
Power supply, grounding, and connection ........................................................................... 151
4.2.2
Isolating distances and insulating equipment ...................................................................... 156
4.2.3
Armature plates .................................................................................................................... 159
4.3
Communication planning ..................................................................................................... 160
