Installation, connection and commissioning
25
isoHV525_D00297_04_M_XXEN/05.2018
4.3 Commissioning
1. Check that the ISOMETER® is properly
connected
to the system to be
monitored.
2.
Connect the supply voltage
U
s
to the ISOMETER®
.
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 proce-
dure may take up to 4 min.
3.
Start a manual self test
by pressing the Test/Reset button.
Relay 1 ("K1") is switched during the self test.
4.
Check the function using a genuine insulation fault
.
Check the ISOMETER® in the system being monitored against earth by using a
suitable resistance, for example.
Wire number
Terminal
Connection
1
2
A1
A2
Connection to the supply voltage
U
s
via fuses (line protec-
tion):
If supplied from an IT system, both lines have to be protected
by a fuse.
3 and 4
5
E
KE
Connect each terminal separately to PE.
6
T/R
Connection for the external combined Test/Reset button
7
8
A
B
Serial communication interface
Example: connection of a BMS Ethernet gateway COM465IP
9
10
11
11
14
24
Common connection for
"
K1
"
and
"
K2
"
Connection to alarm relay
"
K1
"
Connection to alarm relay
"
K2
"
Red
Blue
L1/+
L2/-
Connection to the IT system to be monitored
Summary of Contents for ISOMETER isoHV525
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