MI 3101 EurotestAT: Measurements
Resistance to earth
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5.7 Resistance to earth
Resistance to earth is important for protection against electric shock. This function is
intended for verification of earthing of house installation and other earthings, e.g., earthing
for lighting. The measurement conforms to the EN 61557-6 standard. The following
resistance to earth sub-functions are available:
Standard 3-wire, for standard resistance to earth measurements.
Specific earth resistance by using optional external adapter.
See
4.2 Single test
for keys functionality.
Figure 5.31: Resistance to earth
Test parameters for earth resistance measurement
TEST
Test configuration
[3-wire,
]
Limit
Maximum resistance
[OFF, 1
÷ 5 k
]
If
selected:
Distance
Distance between probes
[0.1 m ÷ 30.0 m] or [1 ft ÷ 100 ft]
5.7.1 Standard 3-wire measurement
Circuits for measuring resistance to earth
MPEC
Rc
Rp
R
E
d
>5d
E
H
S
bl
u
e -
N
b -
L
la
c
k
g
ree
n -
P
E
Figure
5.32
: Resistance to earth measurement – PE grounding
