isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
17
Connection
6. Connection
6.1 Connection conditions
In accordance with VDE 0100, 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
ins-
tallation
has been
de-energised
. Observe the rules for working on elec-
trical installations.
DANGER
Risk of electric shock!
High voltages may be present at terminals "L1/+" to "L3/-". Direct contact
with these will likely result in electrocution.
• Therefore, the device is only to be operated with mounted and locked
terminal covers.
• If the device is connected to a live IT system via terminals "L1/+", "L2",
"L3/-", do not disconnect terminals "KE" and "E" from the protective
conductor ("PE").
• Connect terminals "KE" and "E" individually to the protective earth con-
ductor "PE".
WARNING
Injury, fire and damage to property due to a short circuit!
According to DIN VDE 0100-430, devices used to protect against short cir-
cuits when terminals "L1/+", "L2" und "L3/-" are coupled to the IT system to
be monitored can be omitted if the wiring is designed in such a manner
that the risk of a short circuit is reduced to a minimum. Ensure short-cir-
cuit-proof and earth-fault-proof wiring.
CAUTION
Provide line protection!
According to DIN VDE 0100-430, line protection shall be provided for the
supply voltage.
Risk of injury from sharp-edged terminals!
Risk of lacerations.
Touch the enclosure and the terminals with due care.
Ensure disconnection from the IT system!
When insulation or voltage tests are to be carried out, the device must be
isolated from the system for the test period. Otherwise the device may be
damaged.
Property damage due to improper installation!
Make sure that only
one
insulation monitoring device is connected in
each conductively connected system. If several devices are connected, the
device does not work and does not signal insulation faults. This can da-
mage the installation.
High load currents can result in property damage and injury. Therefore,
do not apply any load current to the terminals. The connecting lines "L1/
+", "L2", "L3/-" to the system to be monitored must be designed as spur li-
nes.
Failure to connect the device as illustrated in the manual leads to deviating
technical data and function restrictions.
Check proper connection!
Prior to commissioning the installation, check that the device has been
properly connected and check the device functions. Perform a functional
test using an earth fault via a suitable resistance.
Prevent measurement errors!
When a monitored AC system contains galvanically coupled DC circuits,
the following applies: An insulation fault can only be detected correctly
when the rectifier valves carry a minimum current of > 10 mA.
For UL applications:
Use 60/75 °C copper lines only!
For UL and CSA applications, the supply voltage must be protected via 5 A
fuses.
