Fluke 1650B [37/62] Measuring earth resistance model 1653b only

Fluke 1650B [37/62] Measuring earth resistance model 1653b only
Electrical Installation Tester
Making Measurements
29
RCD
Mains Supply
PE (L2/Green)
L (L1/Red)
N (L3/Blue)
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Figure 17. Connection for RCD Testing on IT Electrical Systems
The test current flows through the upper side of the RCD, into the L terminal,
and returns though the PE terminal.
Measuring Earth Resistance (Model 1653B Only)
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Figure 18. Earth Resistance Display/Switch and Terminal Settings
The earth resistance test is a 3-wire test consisting of two test stakes and the
earth electrode under test. This test requires an accessory stake kit. Connect
as shown in Figure 19.
Best accuracy is achieved with the middle stake at 62 % of the distance to
the far stake. The stakes should be in a straight line and wires separated to
avoid mutual coupling.
The earth electrode under test should be disconnected from the electrical
system when conducting the test. Earth resistance testing should not be
performed on a live system.

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