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Martindale ET4000 / ET4500
9.3.3
Trip-out time ............................................................................................. 71
9.3.4
Trip-out current ......................................................................................... 71
9.4
Fault loop impedance and prospective fault current ........................................ 72
9.4.1
No disconnecting device or FUSE selected ............................................. 72
9.4.2
RCD selected ........................................................................................... 72
9.5
Line impedance and prospective short-circuit current / Voltage drop .............. 73
9.6
Resistance to earth (ET4500 only) .................................................................. 74
9.6.1
Standard earth resistance measurement - 3-wire measurement ............. 74
9.7
Voltage, frequency, and phase rotation ........................................................... 75
9.7.1
Phase rotation .......................................................................................... 75
9.7.2
Voltage ..................................................................................................... 75
9.7.3
Frequency ................................................................................................ 75
9.7.4
Online terminal voltage monitor ................................................................ 75
9.8
General specifications ..................................................................................... 76
10
Warranty and limitation of liability .................................................................. 79
Appendix A - Impedance tables ................................................................................. 80
A.1 Impedance tables - for fuses, circuit-breakers and RCBO's ................................ 80
Fuses to BS 88-2 - fuse systems E & G Fuses to BS 88-3 - fuse system C ............ 80
Type B circuit-breakers to BS EN 60898 and RCBO's to BS EN 61009-1 .................... 81
Appendix B - Measurement categories ..................................................................... 82
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