HT 400 Series, User Manual

Page: 39 / 88

400 Series
EN - 37
Fig. 18: Instrument connection for 400V + N + PE three-phase P-P line impedance
measurement by means of single cables and remote probe
Fig. 19: Instrument connection for 400V + PE (no N) three-phase P-PE fault loop
impedance measurement through single cables and remote probe
1.
Press the
MENU
key, move the cursor to
LOOP
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.
L O O P
0°
----

- - - - A
FRQ=50.0Hz
VP-N=228V
VP-Pe=228V
P-PE STD
Func Mod.
2.
Use the

,

keys to select the parameter to be modified, and the

,

keys
to modify the parameter value.
It is not necessary to confirm the selection with ENTER
.
Func
The virtual Func key allows setting the measuring mode of the
instrument, which may be:
P-N, P-P, P-PE
UL
The virtual UL key, active only when an IT electrical system and the
P-PE mode have been set (§ 5.2.5), allows setting the limit value of
contact voltage for the system being tested, which may be:
50V,
25V
Mod.
The virtual UL key, not active when an IT electrical system and the
P-PE mode have been set (§ 5.2.5), allows setting the instrument’s
operating mode, which can be:
STD, Z2

ICAL
The virtual ICAL key, active only when the Z2 Ω mode has been
selected with the MOD key, allows selecting the assumed short-
circuit or fault current displayed. Following values are available:
IkMax3Ph, IkMin3Ph, IkMax2Ph, IkMin2Ph, IkMaxP-N, IkMinP-
N, IkMaxP-PE, IkMinP-PE, IkSTD