16
isoHV425_D00082_02_Q_DEEN /05.2018
Insulation monitoring device for unearthed
AC, AC/DC and DC systems (IT systems) up to
3(N)AC, AC 1000 V, DC 1000 V. Software version: D0453
This operating manual is designed for electrically skilled persons working in
electrical engineering and electronics! It does not replace the operating ma-
nual. Ensure that personnel has read this manual and understood all instruc-
tions relating to safety. The manual can be found at:
https://www.bender.de/en/service-support/downloads
1. Intended use
The ISOMETER® monitors the insulation resistance
R
F
of unearthed AC, AC/DC
and DC systems (IT systems) with nominal system voltages from 3(N)AC,
AC/DC 0…1000 V or DC 0…1000 V. The maximum permissible system leakage
capacitance
C
e
is 150 μF. DC components existing in AC systems do not influ-
ence the operating characteristics, when a minimum load current of
DC 100 mA flows. A separate supply voltage
U
s
allows de-energised systems
to be also monitored. In order to meet the requirements of applicable stan-
dards, customised parameter settings must be made on the equipment in or-
der to adapt it to local equipment and operating conditions. Please heed the
limits of the area of application indicated in the technical specifications.
Any use other than that described in this quickstart is regarded as improper.
To ensure that the ISOMETER® functions correctly, a mains
internal resistance of
≤
1 kΩ must exist between L1/+ and
L2/- via the source (e.g. the transformer) or the load.
ISOMETER® isoHV425
with the AGH422 coupling device
EN
