34
isoUG425_D00220_02_Q_DEEN / 05.2018
IT system being monitored
Nominal system voltage
U
n
................................................................................................................... DC 12…120 V
Tolerance of
U
n
........................................................................................................................................................ 20%
Measuring circuit
Internal resistance
R
i
.........................................................................................................................................≥ 115 kΩ
Permissible leakage capacitance
C
e
................................................................................................................... ≤ 50 μF
Response values
Response value
R
an1
...................................................................................................................... 2…100 kΩ (50 kΩ)*
Response value
R
an2
........................................................................................................................ 1…95 kΩ (25 kΩ)*
Operating uncertainty
R
an
......................................................................................................... ± 15 %, at least ±2 kΩ
Hysteresis
R
an
.................................................................................................................................... 25 %, at least 1 kΩ
Undervoltage detection
U
DC
................................................................................................................ 8…143 V (off)*
Overvoltage detection
U
DC
................................................................................................................ 8.1…144 V (off)*
Operating uncertainty
U
DC
........................................................................................................ ± 5 %, at least ± 0.5 V
Hysteresis
U
DC
....................................................................................................................................... 5 %, at least 1 V
Time response
Response time
t
an
at
R
F
= 0.5 x
R
an
and
C
e
=1 μF acc. to IEC 61557-8 ................................................................ ≤ 1 s
Start-up delay
t
..................................................................................................................................... 0…10 s (0 s)*
Response delay
t
on
................................................................................................................................ 0…99 s (0 s)*
Delay on release
t
off
............................................................................................................................... 0…99 s (0 s)*
Displays, memory
Display..................................................................................................... LC display, multi-functional, not illuminated
Display range measured value insulation resistance (
R
F
)........................................................................ 1 kΩ…1 MΩ
Operating uncertainty............................................................................................................... ± 15 %, at least ±2 kΩ
Display range measured value nominal system voltage (
U
n
)....... 0…150 V (
R
F
=∞ : 300 V
P
;
R
F
= 0 kΩ : 150 V
P
)
Operating uncertainty
U
DC
........................................................................................................ ± 5 %, at least ± 0.5 V
Operating uncertainty
U
RMS
..................................................................................................... ± 5 %, at least ± 1.5 V
Password ....................................................................................................................................... off/0…999 (0, off)*
Fault memory alarm message........................................................................................................................ on / (off)*
