HT EQUITEST 5071 User Manual page 28

At the end of the test,
the instrument gives out
a double sound to
indicate that test has
been
performed and
following
appears on the display.
Operating mode
N.B.: In TT systems, the value of impedance measured by the instrument may only be
attributed to the value of overall earth resistance. Therefore, in compliance with
standard CEI 64-8, the measured value may be taken as the value of the system's
earth resistance.
Formula used for calculating the assumed short-circuit current:
where:
100< V
6. The results can be saved by pressing the SAVE key twice (see § 7.1).
LOOP
correctly
the
screen
Freq=50.0HZ
VP-N=231V
P-PE
FUNC
 150
mis
Z = measured Phase-Earth impedance
PE
30.11.12
1.07

215A
Vp-PE=231V
Z2
U = Phase-Earth voltage 127 if
N
230 if 150V< V
EN - 26
EQUITEST 5071
Value of Phase-Earth
impedance expressed in .
Value of the assumed Phase-
Phase short-circuit current
calculated using the formula
reported below
 260
mis
U

N
I
CC
Z
PE