Safety Instructions; General Safety Instructions; Work Activities On Electrical Installations; Device-Specific Safety Instructions - Bender ISOMETER iso1685DP-425 Manual

2. Safety instructions

2.1 General safety instructions

Part of the device documentation in addition to this manual is the enclosed "Safety in-
structions for Bender products".
Read the operating manual before starting to mount, connect and com-
mission the device. After successful commissioning, keep the manual
within easy reach for future reference.

2.2 Work activities on electrical installations.

Only qualified personnel are permitted to carry out the work necessary to
install, commission and run a device or system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• An electric shock
DANGER
• 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.
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.
8
Safety instructions

2.3 Device-specific safety instructions

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.

2.4 Intended use

The device is used for monitoring the insulation resistance in large power supply systems
designed as IT systems. The specific measurement method AMP
tion resistance also in installations where extremely high system leakage capacitances to
earth exist due to interference suppression methods. Adaptation event to high leakage
capacitances is automatic.
The device generates locating current pulses required for insulation fault location. That
allows the localisation of the insulation fault using permanently installed or mobile insu-
lation fault locators.
Intended use also implies:
• The observation of all information in the operating manual
• Compliance with test intervals
In order to meet the requirements of applicable standards, the equipment must be ad-
justed to local equipment and operating conditions by means of customised parameter
settings. Please heed the limits of the range of application indicated in the technical data.
In the "Fast 2000 μF" profile, the iso1685DP can be used in photovoltaic systems.
Any other use than that described in this manual is regarded as improper.
PLUS monitors the insula-
isoxx1685Dx-x25_D00272_06_M_XXEN/04.2020