25
isoHV425_D00082_02_Q_DEEN /05.2018
Measuring circuit
Permissible system leakage capacitance C
e
for an insulation value ≤ 300 kΩ .............................................. ≤ 150 μF
Extraneous DC voltage
U
fg
............................................................................................................................... ≤ 1600 V
Response values
Response value
R
an1
................................................................................................................... 11…500 kΩ (50 kΩ)*
Response value
R
an2
................................................................................................................... 10…490 kΩ (25 kΩ)*
Operating uncertainty
R
an
......................................................................................................... ±15 %, at least ±3 kΩ
Hysteresis
R
an
................................................................................................................................... 25 %, at least 1 kΩ
Undervoltage detection.................................................................................................................. 30…1.09 kV (off)*
Overvoltage detection .................................................................................................................... 31…1.10 kV (off)*
Operating uncertainty
U
.............................................................................................................. ± 5 %, at least ± 5 V
Frequency dependent response uncertainty
≥
200 Hz ............................................................................ -0,075 %/Hz
Hysteresis
U
.......................................................................................................................................... 5 %, at least 5 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 .............................................................. ≤ 20 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…4 MΩ
Operating uncertainty (
R
F
) ....................................................................................................... ±15 %, at least ±3 kΩ
Display range measured value nominal system voltage (
U
n
)........................................................... 30…1.15 kV
RMS
Operating uncertainty.................................................................................................................... ±5 %, at least ±5 V
Display range measured value system leakage capacitance at
R
F
> 10 kΩ .............................................. 0…200 μF
Operating uncertainty................................................................................................................ ±15 %, at least ±2 μF
Password....................................................................................................................................... off/0…999 (0, off)*
Fault memory alarm message.......................................................................................................................... on/(off)*
