Contents
139-2021.9 / 07 NXAIR M 5
10.18 Plugging on the low-voltage connector .......................................................................................................... 57
10.19 Taking the withdrawable circuit-breaker out of the panel ............................................................................... 59
10.20 Inserting the withdrawable circuit-breaker in a panel ..................................................................................... 64
11 Operating the disconnecting panel ....................................................................................................... 73
11.1 Control elements at the front side of the panel .............................................................................................. 73
11.2 Position indicators visible on high-voltage door ............................................................................................. 73
11.3 Access to compartments ............................................................................................................................... 74
11.4 Opening or closing the high-voltage door ...................................................................................................... 74
11.5 Racking the withdrawable disconnector link .................................................................................................. 74
11.6 Removing or plugging on the low-voltage connector ..................................................................................... 76
11.7 Taking the withdrawable disconnector link out of a panel or inserting in a panel ........................................... 76
11.8 Earthing or de-earthing the feeder ................................................................................................................. 76
12 Operating the metering panel ................................................................................................................ 77
12.1 Control elements at the front side of the panel .............................................................................................. 77
12.2 Position indicators visible on high-voltage door ............................................................................................. 77
12.3 Access to compartments ............................................................................................................................... 78
12.4 Opening or closing the high-voltage door ...................................................................................................... 78
12.5 Racking the withdrawable metering part ........................................................................................................ 78
12.6 Removing or plugging on the low-voltage connector ..................................................................................... 78
12.7 Taking the withdrawable metering part out of a panel or inserting in a panel ................................................ 79
12.8 Replacing protection fuse-links ...................................................................................................................... 79
13 Operating the circuit-breaker panel with HV HRC fuse ....................................................................... 83
13.1 Control elements at the front side of the panel .............................................................................................. 83
13.2 Position indicators visible on high-voltage door ............................................................................................. 84
13.3 Access to compartments ............................................................................................................................... 84
13.4 Opening or closing the high-voltage door ...................................................................................................... 84
13.5 Racking the withdrawable part ....................................................................................................................... 84
13.6 Closing or opening the circuit breaker / fuse combination ............................................................................. 85
13.7 Discharging or charging the closing spring .................................................................................................... 85
13.8 Earthing or de-earthing the feeder manually .................................................................................................. 85
13.9 Removing the low-voltage connector ............................................................................................................. 85
13.10 Plugging on the low-voltage connector .......................................................................................................... 87
13.11 Taking the withdrawable circuit-breaker / fuse combination out of a panel or inserting in a panel ................. 89
13.12 Replacement of HV HRC fuse-links ............................................................................................................... 89
14 Operating the circuit-breaker panel for double-busbar system ......................................................... 99
14.2 Position indicators visible on high-voltage door, panel A ............................................................................. 101
14.3 Position indicators visible on high-voltage door, panel B ............................................................................. 101
14.4 Access to compartments ............................................................................................................................. 101
14.5 Opening or closing the high-voltage door .................................................................................................... 102
14.6 Positions of the withdrawable circuit-breaker ............................................................................................... 102
14.7 Racking the withdrawable circuit-breaker .................................................................................................... 102
14.8 Closing or opening the circuit-breaker ......................................................................................................... 102
14.9 Discharging or charging the closing spring .................................................................................................. 102
14.10 Earthing or de-earthing the feeder ............................................................................................................... 103
14.11 Removing or plugging on the low-voltage connector ................................................................................... 103
14.12 Taking the withdrawable part out of a panel or inserting in a panel ............................................................. 103
15 Operating the removable voltage transformers ................................................................................. 104
15.2 Opening or closing the high-voltage door .................................................................................................... 104
15.3 Racking the removable voltage transformers to service position ................................................................. 105
15.4 Racking the removable voltage transformers to test position ...................................................................... 109
15.5 Taking the removable voltage transformers out of the panel ....................................................................... 113
15.6 Inserting the removable voltage transformers in a panel ............................................................................. 117
15.7 Replacing protection fuse-links .................................................................................................................... 122
16 Verifying safe isolation from supply ................................................................................................... 125
16.1 Application of voltage indicators .................................................................................................................. 125
16.2 Overview of voltage indicating systems ....................................................................................................... 125
16.3 LRM system overview .................................................................................................................................. 126
16.4 Verifying LRM-ST voltage indicator ............................................................................................................. 127
16.5 Verifying safe isolation from supply with the LRM device system ................................................................ 128
16.6 CAPDIS and VOIS systems overview .......................................................................................................... 129
16.7 Verifying safe isolation from supply with the CAPDIS or VOIS device system ............................................ 132
16.8 Supplier information ..................................................................................................................................... 132
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