METREL MI 3125 - Earth Connection and Equipotential Bonding Resistance

MI 3125 InstaltestCOMBO Resistance of earth connection
30
5.4 Resistance of earth connection and equipotential
bonding
The resistance measurement is performed in order to ensure that the protective
measures against electric shock through earth connections and bondings are effective.
Two sub-functions are available:
 R LOWΩ - Earth bond resistance measurement according to EN 61557-4 (200
mA),
See chapter 4.1 Function selection for instructions on
key functionality.
Figure 5.12: 200 mA RLOW Ω
Test parameters for resistance measurement
TEST Resistance measurement sub-function [R LOWΩ]
Limit
Maximum resistance [OFF, 0.1 Ω ÷ 20.0 Ω]