MARTINDALE ET4500 - Page 4

Martindale ET4000 / ET4500 Table of contents
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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