HT COMBITEST422 User Manual page 41

Fig. 20: Connection for a 400V + N (no PE) three-phase system by means of single cables
Fig. 21: Connection for a 400V + PE (no N) system with cables and remote switch probe
1. Press the MENU key, move the cursor to RCD in the
main menu by means of the arrow keys (,) and
confirm with ENTER. Subsequently, the instrument
displays a screen similar to the one reported here to the
side.
Select "UK" as a country (see § 5.1.2), the options "TN,
TN or IT", "25 or 50V", "50Hz or 60Hz" and the reference
voltage in the general settings of the instrument (see §
5.1.3).
2. Use the ,  keys to select the parameter to be modified, and the ,  keys to
modify the parameter value:
➢ MODE → The virtual key allows setting the measuring mode of the instrument,
which may be: AUTO, x½, x1, x5,
➢ In → The virtual key allows setting the nominal value of the RCD's tripping current,
which may be: 6mA, 10mA, 30mA, 100mA, 300mA, 500mA, 650mA, 1000mA
➢ Type → The virtual key enables the selection of the RCD type, which may be: AC
( ), ACS ( S), A (
➢ Ut → The virtual key allows setting the possible visualization of the contact voltage
value at the end of measurement. Options: Ut or NoUt
and remote switch probe
), AS ( S), B ( ) with polarity positive (+) or negative (-)
EN - 41
COMBITEST422
15/10 – 18:04
R C D
TT
T = - - - ms
Ut = - - - V
FREQ. = 0.00Hz
VL-PE=0V VL-N=0V
+
X1 30mA
MODE In Type Ut