Commissioning - Bender ISOMETER isoES425 Manual

Installation, connection and commissioning
Wiring diagram legend:
Terminal
Connection to the supply voltage U
A1, A2
If being supplied from an IT system, both lines have to be protected by a fuse.*
Connect each terminal separately to PE:
E, KE
The same wire cross section as for "A1", "A2" is to be used.
L1/+, L2/– Connection to the AC or DC system to be monitored
T/R Connection for the external combined test and reset button
11, 14 Connection to alarm relay "K1"
11, 24 Connection to alarm relay "K2"
RS-485 communication interface with connectable terminating resistor
A, B
Example: Connection of a BMS Ethernet gateway COM465IP
* For UL applications:
Use 60/75 °C copper lines only!
For UL and CSA applications, the supply voltage U
5 A fuses.
Connect the device according to the wiring diagram.
14
Connections
via fuse (line protection):
s
must be protected via
s
Installation, connection and commissioning

4.3 Commissioning

1. Check that the ISOMETER® is properly connected to the system to be monitored.
2. Connect the supply voltage U
s
The device carries out a calibration, a self test and adjusts itself to the IT system to be
monitored. When high system leakage capacitances are involved, this procedure
may take up to 4 min. The standard display then appears showing the present insu-
lation resistance R , e.g.:
F
The pulse symbol signals an error-free update of the resistance measured value. If
the measuring value cannot be updated due to disturbances, the pulse symbol will
be blanked.
3. Start a manual self test by pressing the test button "T". Whilst the test button is
pressed and held down, all display elements available for this device are shown.
During the test, the "tES" symbol flashes. Any internal malfunctions detected are
shown on the display as error codes (refer to
checked during the test (factory setting). The setting can be changed in the "out"
menu so that the relays switch to the alarm state during the manual self test.
4. Check the factory settings for suitability.
Are the settings suitable for the installation to be monitored?
The list of factory settings are shown in the tables from
5. Check the function using a genuine insulation fault.
Check the ISOMETER® in the system being monitored against earth, e.g. via a suita-
ble resistance.
to the ISOMETER®.
Page 9). The alarm relays are not
Page 16.
isoES425_D00214_00_M_XXEN/01.2019