METREL MI 3122 Instruction Manual page 4

MI 3122 Smartec Z Line-Loop / RCD
6.5.2 Clearing measurement(s) in selected location ......................................................... 42
6.5.3 Clearing individual measurements ........................................................................... 43
6.6 Communication ................................................................................................................ 44
7 Maintenance ........................................................................................................................ 45
7.1 Cleaning ........................................................................................................................... 45
7.2 Periodic calibration .......................................................................................................... 45
7.3 Service ............................................................................................................................. 45
8 Technical specifications .................................................................................................... 46
8.1 RCD testing ..................................................................................................................... 46
8.1.1 General data ............................................................................................................ 46
8.1.2 Contact voltage RCD-Uc .......................................................................................... 46
8.1.3 Trip-out time ............................................................................................................. 47
8.1.4 Trip-out current ........................................................................................................ 47
8.2 Fault loop impedance and prospective fault current ........................................................ 47
8.2.1 No disconnecting device or FUSE selected ............................................................. 47
8.2.2 RCD selected ........................................................................................................... 48
8.3 Line impedance and prospective short-circuit current ..................................................... 48
8.4 Voltage, frequency, and phase rotation ........................................................................... 49
8.4.1 Phase rotation .......................................................................................................... 49
8.4.2 Voltage ..................................................................................................................... 49
8.4.3 Frequency ................................................................................................................ 49
8.5 Online terminal voltage monitor ....................................................................................... 49
8.6 General data .................................................................................................................... 50
A Appendix A - Fuse table .................................................................................................... 51
A.1 Fuse table - IPSC ............................................................................................................ 51
A.2 Fuse table - impedances (UK) ......................................................................................... 53
A.3 Fuse table - Impedances at 230 V a.c. (AS/NZS 3017) ................................................... 54
B Appendix B - Accessories for specific measurements................................................... 56
C Appendix C - Country notes ............................................................................................. 57
C.1 List of country modifications ............................................................................................ 57
C.2 Modification issues .......................................................................................................... 57
C.2.1 AUS / NZ modification - Fuse types according to AS/NZS 3017 ............................ 57
4
Table of contents