HT Italia GSC53N, Instruction Manual

Page: 49 / 152

GSC53N - GSC57 - ZG47
EN - 47
6.4.5. Measurement procedure and results of " R
A
" mode
1. Select R
A
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 .
P
B2
B3
B4 B1
I1 I2 I3
Instrument connection for P-PE test in a 230V
single-phase System
B2 B3 B4 B1
I1 I2 I3
1
3
N
Instrument connection for P-PE 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. The key F4 permits to select one of the following limit values for the contact
voltage (which can be shown cyclically when pressing the key):
 50V (default)
 25V.
6. Press the START key to execute a test.
WARNING
The R
A
measurement make flow a test current of 15mA. This may cause
tripping of 10mA. If necessary effect the test upstream the switch.
WARNING
Never disconnect the test leads from the circuit under test when the
message
" MEASURING " is displayed.
START
STOP