iso1685P_D00003_01_M_XXEN / 12.2016
22
Settings
7. Settings
7.1 Setting the BMS bus adress
See
7.2 Alarm for insulation faults
The ISOMETER®s limit values for alarm 1 and alarm 2 can be set via a BMS gateway (e. g.
COM460IP) or a terminal tool and the BMS bus. Activation or deactivation of the two
alarm levels Ran1 (alarm 1) and Ran2 (alarm 2) are illustrated in the following graphic:
An alarm will become inactive as soon as the hysteresis of the set operating value is
exceeded.
For alarm 1 and alarm 2 an insulation resistance of 200 Ω…1 MΩ can be set.
Condition: alarm 1 ≥ alarm 2.
t
R
R
an1
R
an2
Alarm 1
active
Alarm 2
active
Alarm 2
inactive
Alarm 1
inactive
hysteresis
hysteresis
7.3 Setting the permissible system leakage capacitance
or measurement speed
Segments 6 and 7 of the DIP switch SS8103 are used to select the maximum system leaka-
ge capacitance
C
e max
and to set the measurement speed. The measurement speed, for
example, can be set to "Slow" in the event of frequently occurring false alarms caused by
transients in the system. In the Slow mode, the measuring time doubles. Segment 8 is
reserved.
Before changing the settings on the DIP switch make sure that the supply
voltage is switched off.
When the maximum system leakage capacity C
e
max is set to 500 µF the
upper limit of measuring range for the insulation resistance decreases
from 1 MΩ to 200 kΩ. Therefore, check the setting of the response values
R
an
.
DIP switch SS8103, segment 6:
OFF = 150 µF =
C
e max
ON = 500 µF =
C
e max
Switch position:
Up = Off
Down = On
DIP switch SS8103, segment 7:
OFF = Fast
ON = Slow
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
SS8103
