TESTBOY TV 450
Resistance of earth connection
32
5.3
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 LOW
Ω
- Earth bond resistance measurement according to EN 61557-4 (200
mA),
CONTINUITY - Continuous resistance measurement performed with 7 mA
(model TESTBOY TV 450 (TYPE B)).
See chapter
4.1 Function selection
for instructions on
key functionality.
Figure 5.8: 200 mA RLOW
Ω
Test parameters for resistance measurement
* model TESTBOY TV 450 (TYPE B)
TEST Resistance
measurement
sub-function
[R LOW
Ω
, CONTINUITY*]
Limit
Maximum resistance
[OFF, 0.1
Ω
÷ 20.0
Ω
]
