44 45
We can calculate that:
Oil tank ground resistance RA= R1+R2-R3 2
Loading point ground resistance RC=R2-RA
Auxiliary polarity ground resistance RB=R1-RA
(2) Measurement of the oil-filling ground resistance
Loading point polarity C
Test line
As shown in the above picture, find a ground polarity independent from the
oil-filling machine, for instance, loading point polarity . Connect them with test line
and read RT with the clamp meter . We can calculate that:
Oil-filling machine ground resistance: R=RT-RC
Of which, RT is the resistance value measured by clamp meter , and RC is the
loading point ground resistance.
(3) Measurement of the oil-filling machine oil hose connection resistance
Hose
Test line
Oil-filling machine
Oil stopper
UT276A/278A OPERATING MANUALUT276A/278A OPERATING MANUAL
Notes: in measuring R1, there should be no leading wire between BC and AC and
by analogy to R2 and R3.
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