Safety Instructions; General Safety Instructions; Work Activities On Electrical Installations; Device-Specific Safety Information - Bender ISOMETER isoHR1685DW-925 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".

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.

2.3 Device-specific safety information

Danger as a result of excessive locating current or excessive locating
voltage!
An excessive locating current of the internal locating current injector may
damage sensitive loads (e.g. control circuits) or trigger unwanted switch-
DANGER
ing operations. Select a low locating current for these systems. In case of
doubt, please contact our service department.
Risk of an electric shock!
When opening the device, you may come into contact with live parts.
Switch off the mains voltage before opening the device!
DANGER
7
Safety instructions
Make sure that the basic settings meet the requirements of the IT system.
Persons without the necessary expertise, in particular children, must not
have access to or contact with the ISOMETER®.
WARNING
Make sure that the operating voltage is correct!
Prior to insulation and voltage tests, the ISOMETER® must be disconnected
from the IT system for the duration of the test. In order to check the correct
CAUTION connection of the device, a function test has to be carried out before start-
ing the system.
In case the ISOMETER® issues an alarm message, the insulation fault
should be eliminated as quickly as possible.
The alarm message of the ISOMETER® must be audible and/or visible even
when the device is installed inside a control cabinet.
When using ISOMETER®s in IT systems, make sure that only one active ISO-
METER® is connected in each interconnected system. If IT systems are in-
terconnected via coupling switches, make sure that ISOMETER®s not
currently used are disconnected from the IT system and deactivated. IT
systems coupled via diodes or capacitances may also influence the insu-
lation monitoring process so that a central control of the different ISOME-
TER®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 converters, ...) carry a mini-
mum current of > 10 mA.
isoHR1685DW-925_D00369_01_M_XXEN/02.2021