Commissioning - Bender ISOMETER isoGEN423 Manual

Installation, connection and commissioning
E
L1/+ L2/-
L1/+
Test / Reset
ON
T
T/R
T/R
Figure: Wiring diagram
* For UL applications:
Use 60/70 °C copper lines only!
For UL and CSA applications, using 5 A fuses for the protection of the supply voltage U
3.4

Commissioning

1. Check that the ISOMETER® is properly connected to the system to be monitored.
2. Connect supply voltage U
The device carries out a calibration, a self test and adjusts itself to the IT system to be monitored. With
high system leakage capacitances this process may take up to 4 min. The standard display then appears
showing the present insulation resistance, e.g.:
The pulse symbol signals an error-free update of the resistance and capacitance measured values. If the
measured value cannot be updated due to disturbances, the pulse symbol will be blanked.
The voltage of the IT system to be monitored can also be selected as standard display: Select measured
value display U
L1L2
16 isoGEN423_D00221_05_M_XXEN
U
S
6 A 6 A
KE A1 A2
E KE A1 A2
L2/-
k
AL1 AL2
R MENU
R
14 24 11
on
off
A B
R
K1 K2
14 24 11 A
to the ISOMETER®.
s
with the up and down buttons and accept with ENTER.
L1/+
Terminal
L2/-
L3
A1, A2
PE
E, KE
L1/+,
L2/–
T/R
11, 14
11, 24
A, B
COM465IP
B
RS-485
Connections
Connection to the supply voltage U
fuse (line protection):
If supplied from an IT system, both lines
have to be protected by a fuse.*
Connect each terminal separately to PE:
The same wire cross section as for 'A1', 'A2'
is to be used.
Connection to the 3(N)AC, AC or DC system
to be monitored
Connection for the external combined test
and reset button
Connection to alarm relay 'K1'
Connection to alarm relay 'K2'
RS-485 communication interface with
connectable terminating resistor
Example: Connection of a BMS Ethernet
gateway COM465IP
is mandatory.
s
via
s