BENNING IT 115
Content
- 4 -
5.8
Testing the protective conductor connection (PE) ..................................................... 49
6
Maintenance .................................................................................................................... 51
6.1
Fuse replacement ..................................................................................................... 51
6.2
Cleaning .................................................................................................................... 51
6.3
Periodic calibration .................................................................................................... 51
6.4
Service ...................................................................................................................... 52
7
Technical data ................................................................................................................. 53
7.1
Insulating resistance.................................................................................................. 53
7.2
Low-impedance resistance / continuity test ............................................................... 54
7.2.1
Low-impedance resistance R LOW ................................................................... 54
7.2.2
Continuity test .................................................................................................... 54
7.3
Residual current protection devices (RCDs) .............................................................. 55
7.3.1
General data ...................................................................................................... 55
7.3.2
Contact voltage (Uc) .......................................................................................... 55
7.3.3
Tripping time (RCD t) ......................................................................................... 56
7.3.4
Tripping current (RCD I) .................................................................................... 56
7.4
Loop impedance and prospective short-circuit current ............................................... 57
7.4.1
Zs function (for systems without RCD) ............................................................... 57
7.4.2
Zsrcd function (for systems with RCD) ............................................................... 57
7.5
Line impedance and prospective short-circuit current / voltage drop ......................... 58
7.6
Earthing resistance ................................................................................................... 58
7.7
TRMS voltage, frequency and phase sequence ........................................................ 59
7.7.1
TRMS voltage (AC/DC) ..................................................................................... 59
7.7.2
Voltage of the connection monitor ..................................................................... 59
7.7.3
Frequency ......................................................................................................... 59
7.7.4
Phase sequence (rotary field) ............................................................................ 59
7.8
General data ............................................................................................................. 60
Appendix A
Fuse table – Prospective short-circuit current .......................................... 61
Appendix B
Standard and optional accessories for specific measuring functions .... 64
Appendix C
"Commander" test probe, "Commander" test plug ................................... 65
C.1
Safety warnings ................................................................................................ 65
C.2
Batteries ................................................................................................................... 65
C.3
Description of the optional "Commanders" .......................................................... 66
C.4
LED indications of the "Commanders" .................................................................. 67
