HT instruments EQUITEST5071 - Manual (Page 25)

EQUITEST 5071
EN - 23
CAUTION
The following test entails the circulation of a maximum current of approx. 6A
between phase and neutral. This could cause the tripping of possible
magnetothermal protections with lower tripping currents. In this case, carry
out the measurement upstreams of the protections.
CAUTION
When message "MEASURING…" is displayed, this indicates that the
instrument is carrying out the test. Never disconnect the instrument’s leads
during this phase.
At the end of the test,
the instrument gives out
a double sound to
indicate that test has
been correctly
performed and the
following screen
appears on the display.
Value of Phase-Neutral Line
impedance expressed in
Ohm
LOOP 30.11.12
1.07

215A
FRQ=50.0HZ
VP-N=231V VP-PE=231V
P-N

Value of the assumed Phase-
Neutral short-circuit current
calculated using the formula
reported below
FUNC Z2

Formula used for calculating the assumed short-circuit current:
PN
N
CC
Z
U
I

where U
N
= Phase-Neutral voltage 127 if V
mis
 150
230 if 150V< V
mis
260
Z
PN
= measured Phase-Neutral impedance
6. The results can be saved by pressing the SAVE key twice (see § 7.1).