Bender ISOMETER isoES425 Kurzanleitung Seite 35

IT system being monitored
Nominal system voltage
Tolerance of ....................................................................................................................................................... 25 %
n
Frequency range of .........................................................................................................................DC, 15...460 Hz
n
Measuring circuit
Measuring voltage ......................................................................................................................................... ±12 V
m
Measuring current at
m
Internal resistance .........................................................................................................................................≥ 115 kΩ
i
Permissible leakage capacitance
Permissible external DC voltage
Response values
Response value ..................................................................................................................... 2...990 kΩ (69 kΩ)*
an1
Response value ..................................................................................................................... 1...980 kΩ (23 kΩ)*
an2
Operating uncertainty
Hysteresis .................................................................................................................................... 25 %, at least 1 kΩ
an
Undervoltage detection .................................................................................................................. 10...499 V (off)*
Overvoltage detection .................................................................................................................... 11...500 V (off)*
Operating uncertainty ............................................................................................................... ± 5 %, at least ±5 V
Frequency dependent operating uncertainty ≥ 400 Hz ........................................................................... -0.015 %/Hz
Hysteresis ........................................................................................................................................... 5 %, at least 5 V
Time response
Response time at = 0.5 x
an F
Start-up delay ...................................................................................................................................... 0...10 s (0 s)*
Response delay ................................................................................................................................ 0...99 s (0 s)*
on
Delay on release ............................................................................................................................... 0...99 s (0 s)*
off
Displays, memory
Display..................................................................................................... LC display, multi-functional, not illuminated
Display range measured value insulation resistance (
Operating uncertainty................................................................................................................ ±15 %, at least ±1 kΩ
Display range measured nominal system voltage value (
Operating uncertainty ................................................................................................................ ±5 %, at least ±5 V
isoES425_D00214_00_Q_DEEN/08.2017
...............................................................................3(N)AC, AC 0...400 V/DC 0...400 V
n
............................................................................................................................. ≤ 110 μA
F
................................................................................................................ ≤ 100 μF
e
...................................................................................................................≤ 700 V
fg
......................................................................................................... ±15 %, at least ±1 kΩ
an
and =1 μF acc. to IEC 61557-8 .............................................................. ≤ 10 s
an e
) ........................................................................ 1 kΩ...4 MΩ
F
)................................................................ 0...500 V
n RMS
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