Ht Instruments COMBI G2VDE-tester 1009990 Data Sheet
Product codes
1009990
Gx
Series
EN - 2
6.7.2.
3-wire or 2-wire earth measure – USA, Extra Europe and Germany countries .................... 68
6.7.3.
Earth measurement with optional clamp T2100 .................................................................... 71
6.7.4.
Anomalous situations in 3-wire and 2-wire earth measurements .......................................... 74
6.8.
AUX: Measure of ambient parameters through external probes ..................................... 75
6.9.
ΔV%: Voltage drop of main lines ..................................................................................... 77
6.9.1.
Anomalous situations ............................................................................................................. 81
6.10. PQA: Real time measurement of main parameters ......................................................... 83
7.
OPERATIONS WITH THE MEMORY ......................................................................... 86
7.1.
Saving measurements ..................................................................................................... 86
7.2.
Recalling measurements and deleting the memory ........................................................ 87
7.2.1.
Anomalous situations ............................................................................................................. 88
8.
CONNECTING THE INSTRUMENT TO A PC OR MOBILE DEVICES ...................... 89
8.1.
Connection to iOS/Android devices through WiFi ........................................................... 89
9.
MAINTENANCE .......................................................................................................... 90
9.1.
General information ......................................................................................................... 90
9.2.
Replacement of the batteries .......................................................................................... 90
9.3.
Cleaning the instrument .................................................................................................. 90
9.4.
End of life ........................................................................................................................ 90
10.
TECHNICAL SPECIFICATIONS ................................................................................. 91
10.1. Technical characteristics ................................................................................................. 91
10.2. Reference guidelines ....................................................................................................... 96
10.3. General characteristics .................................................................................................... 96
10.4. Environment .................................................................................................................... 96
10.4.1.
Environmental conditions for use ........................................................................................... 96
10.5. Accessories ..................................................................................................................... 96
11.
SERVICE .................................................................................................................... 97
11.1. Warranty conditions ......................................................................................................... 97
11.2. Service ............................................................................................................................ 97
12.
THEORETICAL APPENDIXES ................................................................................... 98
12.1. Continuity of protective conductors ................................................................................. 98
12.2. Insulation resistance........................................................................................................ 99
12.3. Checking circuit separation ........................................................................................... 100
12.4. Test on differential switches (RCD) ............................................................................... 102
12.5. Verify of the breaking capacity of protection devices .................................................... 103
12.6. Verify of protection against indirect contacts in TN systems ......................................... 104
12.7. Verify of protection against indirect contacts in TT systems ......................................... 106
12.8. Verify of protection against indirect contacts in IT systems ........................................... 107
12.9. Verify of protection coordination L-L, L-N and L-PE ...................................................... 108
12.10. Verify of the protection against short circuits – Test I2t ................................................. 110
12.11. Verification of voltage drop on main lines ...................................................................... 111
12.12. Measurement of earth resistance in TN systems .......................................................... 112
12.12.1.
Measurement of earth impedance by voltammetric method ............................................... 113
12.12.2.
Ground resistivity measurement .......................................................................................... 115
12.13. Voltage and current Harmonics ..................................................................................... 117
12.13.1.
Limit values for harmonics ................................................................................................... 117
12.13.2.
Presence of harmonics: causes ........................................................................................... 118
12.13.3.
Presence of harmonics: consequences ............................................................................... 119
12.14. Calculation of powers and power factors ...................................................................... 120