isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
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Safety instructions
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the enclosed "Safety
instructions for Bender products".
2.2 Work activities on electrical installations.
If the device is used outside the Federal Republic of Germany, the applicable local stand-
ards and regulations must be complied with. The European standard EN 50110 can be
used as a guide.
Read the operating manual before starting to install, connect and com-
mission the device. After successful commissioning, keep the manual
within easy reach for future reference.
Only
qualified personnel
are permitted to carry out the work necessary
to install, commission and run a device or system.
DANGER
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• A fatal electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing and connecting the device, make sure
that the
in-
stallation
has been
de-energised
. Observe the rules for working on elec-
trical installations.
2.3 Device-specific safety information
2.4 Intended use
The ISOMETER® iso685… monitors the insulation resistance of unearthed AC/DC main
circuits (IT systems) with nominal system voltages of AC 0…690 V or DC 0…1000 V.
DC components existing in AC/DC systems do not influence the operating characteristics.
A separate supply voltage allows de-energised systems to be monitored too. The ma-
ximum permissible system leakage capacitance is 0…1000 μF, depending on the profile.
Intended use also implies:
• Reading and observing all information in the operating manual
• Compliance with test intervals
In order to meet the requirements of applicable standards, customised parameter set-
tings must be made on the equipment in order to adapt it to local equipment and opera-
ting conditions. Please heed the limits of the area of application indicated in the technical
specifications.
Any other use than that described in this manual is regarded as improper.
Installation inside a control cabinet
If the ISOMETER® is installed inside a control cabinet, the insulation fault
message must be audible and/or visible to attract attention.
IT systems with several ISOMETER®s
Make sure that only one active ISOMETER® is connected in each intercon-
nected system. If IT systems are interconnected via coupling switches,
make sure that ISOMETER®s not currently used are disconnected from the
IT system and deactivated. For IT systems coupled via diodes or capaci-
tances a central control of the different ISOMETER®s is required.
Prevent measurement errors!
When a monitored IT system contains galvanically coupled DC circuits, an
insulation fault can only be detected correctly if the rectifier valves (e.g.
rectifier diode, thyristors, IGBTs, frequency inverters, …) carry a minimum
current of > 10 mA.
Unspecified frequency range
When connecting to an IT system with frequency components below the
specified frequency range, the response times and response values may
differ from the indicated technical data. However, depending on the ap-
plication and the selected measurement method, continuous insulation
monitoring is also possible in this frequency range.
