METREL MI 3399, Instruction Manual With Exercises

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Electrical Installation Safety Trainer AD 1 - MI 3399
32
Figure 2-5: Short circuit current between Line and Neutral....................................... 50
Figure 2-6: Short circuit current between two Phase conductors .............................. 51
Figure 2-7: Topology in a 1-phase TN system on the supply side ............................ 52
Figure 2-8: Topology in a 3-phase TN system on the outlet side .............................. 55
Figure 2-9: Simulated error on a 3-phase TN or TT system ..................................... 58
Figure 2-10: Chart reference for fault loop impedance measurements
– TN system 62
Figure 2-11: Chart reference for fault loop impedance measurements
– TT system 62
Figure 2-12: Measuring Z
Loop
in Application Trainer’s switchboard with cables on the
supply side (before the RCD) ................................................................................... 62
Figure 2-13: Measuring Z
Loop
in the Application Trainer with the schuko commander
................................................................................................................................. 63
Figure 2-14: Fault loop in 1 phase TN system .......................................................... 64
Figure 2-15: Fault loop in TT system ........................................................................ 65
Figure 2-16: Loop impedance measurement in a RCD protected system ................ 66
Figure 2-17: Topology in a 1-phase TN system on the supply side .......................... 66
Figure 2-18: Topology in a 1-phase TN system on the circuit side ........................... 69
Figure 2-19: Topology in a 3-phase TN system on the circuit side ........................... 70
Figure 2-20: Simulated error on PE conductor in a 1-phase TN system ................... 72
Figure 2-21: Simulated errors on the line conductor ................................................. 73
Figure 2-22: Chart reference for line impedance measurements .............................. 75
Figure 2-23: Chart reference for fault loop impedance measurements
– TT system 75
Figure 2-
24: RCD measurement in Application Trainer’s switchboard with cables on
the supply side .......................................................................................................... 75
Figure 2-25: RCD measurement in the Application Trainer with the schuko commander
................................................................................................................................. 76
Figure 2-26: RCD measurement in an IT earthing system........................................ 76
Figure 2-27: RCD measurement in a 1-phase TT system ........................................ 78
Figure 2-28: Chart reference for IMD and single fault leakage current measurements
................................................................................................................................. 84
Figure 2-29: Measuring I
SFL
and IMD in an IT system .............................................. 84
Figure 2-30: ISFL simulated errors on an IT system ................................................. 87
Figure 2-31: IMD simulated errors on an IT system .................................................. 89
Figure 2-32: Chart reference for insulation resistance measurements ..................... 90
Figure 2-33: Insulation resistance measurement at the switchboard
– all circuits on 90
Figure 2-34: Insulation resistance measurement at the switchboard
– disabling circuits
during measurement ................................................................................................. 91
Figure 2-35: Insulation test performed on switchboard and outlet ............................ 92
Figure 2-36: R
ISO
simulated error between phase and PE conductors ..................... 94
Figure 2-37: R
ISO
simulated error between phase and neutral conductors ............... 96
Figure 2-38: R
ISO
simulated error between phase conductors in an IT system ......... 98
Figure 2-39: Insulation resistance measurement at the varistor ............................. 100
Figure 2-40: R
ISO
simulated error on the varistor cabling ........................................ 101
Figure 2-41: Chart reference for continuity measurements .................................... 102
Figure 2-42: Continuity measurement between MPE and socket ........................... 102
Figure 2-43: Continuity measurement between switchboard and socket ................ 103
Figure 2-44: Standard continuity test ...................................................................... 104
Figure 2-45: Simulated continuity error ................................................................... 106