HT Italia GSC53N, Instruction Manual

Page: 45 / 152

GSC53N - GSC57 - ZG47
EN - 43
6.4.3. Measurement procedure and results of "P-P" mode
1. Select P-P mode by means of the F1 key.
2. Connect the Black, Green and Blue connectors of the three-terminal shuko cable or
of the split cables to the corresponding input terminals of the instrument B1 , B3 , B4
B2 B3
B4
B1
I1 I2 I3
1
3
N
Instrument connection for P-P test in a 400V three-phase system
3. Connect the shuko plug into a 230V 50Hz socket or the crocodiles to the
conductors of the three-phase system (see previous pictures).
4. If possible disconnect all low impedance loads downstream the point at which
the measurement is to be taken, as such impedance would be in parallel with
the line impedance to be measured.
5. Press the START key. The instrument starts the test.
WARNING
The P-P measurement in a 400V system make flow a test current of 11.5A
approx. This may cause the tripping of magnetic protection switch with
nominal value lower than 10A. If necessary effect the test upstream the
switch.
 At the end of the test
the instrument emits a
double sound signal
indicating that the test
is
correctly
terminated and
displays the values
alongside.
LOOP 05.06.01
Value of phase to phase
impedance expressed in .
0.57
701A
FRQ=50.0HZ
VP-P=402V VP-PE=231V
P-P

Value of the phase to phase
prospective
short circuit
current expressed in Ampere
calculated according to the
following formula.
FUNC Z2
Working mode
START
STOP