METREL MI 3125 - Page 4

MI 3125 InstaltestCOMBO Table of contents
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6 Maintenance..........................................................................................................47
6.1 Fuse replacement............................................................................................47
6.2 Cleaning ..........................................................................................................47
6.3 Periodic calibration ..........................................................................................47
6.4 Upgrading the instrument ................................................................................47
6.5 Service ............................................................................................................48
7 Technical specifications ......................................................................................49
7.1 Insulation resistance........................................................................................49
7.2 Continuity ........................................................................................................49
7.2.1 Resistance R LOW Ω ........................................................................................... 49
7.3 RCD testing .....................................................................................................50
7.3.1 General data ....................................................................................................... 50
7.3.2 Contact voltage RCD-Uc..................................................................................... 50
7.3.3 Trip-out time ........................................................................................................ 51
7.3.4 Trip-out current.................................................................................................... 51
7.4 Fault loop impedance and prospective fault current ........................................51
7.4.1 No disconnecting device or FUSE selected ........................................................ 51
7.4.2 RCD selected ...................................................................................................... 52
7.5 Line impedance and prospective short-circuit current .....................................52
7.6 Socket test (RLN, RLPE, RNPE, RPE)............................................................53
7.7 Voltage, frequency, and phase rotation...........................................................53
7.7.1 Phase rotation ..................................................................................................... 53
7.7.2 Voltage ................................................................................................................ 53
7.7.3 Frequency ........................................................................................................... 53
7.7.4 Online terminal voltage monitor .......................................................................... 54
7.8 General data....................................................................................................54
A Appendix A - Fuse table.......................................................................................55
A.1 Fuse table - IPSC ............................................................................................55
B Appendix B - Accessories for specific measurements .....................................58