isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
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14. Technical data
14.1 Device profiles isoHR685W-x-I-B
Adjustment to different applications can be carried out very easily by selecting a device profile.
For response times, refer „Device profiles“ at the follwing sections.
Nominal system
voltage
System
frequency
System
leakage
capacitance
Measurin
g voltage
Measuring
range
Response
values
Description
Power cirquit
AC 0…1000 V
3AC 0…690 V
DC 0…1300 V
15…460 Hz
0…150 μF
± 50 V
0,1 k
Ω
…10 G
Ω
1 k
Ω
…3 G
Ω
Main circuits without dynamic frequency changes.
The universal profile is suitable for all systems primarily with constant
mains frequencies and extraneous DC voltages. When using inverters and
dynamic frequency control, select inverters > 10 Hz or inverters < 10 Hz.
Control cirquit
AC 0…230 V
3AC 0…230 V
DC 0…230 V
15…460 Hz
0…150 μF
± 10 V
0,1 k
Ω
…<1
M
Ω
1 k
Ω
…950 k
Ω
This profile is used to reduce the measurement voltage to ±10 V in con-
trol systems with lower nominal voltages in order to reduce the impact
by the ISOMETER® on sensitive switching elements.
Generator
AC 0…690 V
3AC 0…690 V
50…60 Hz
0…5 μF
± 50 V
0,1 k
Ω
…1 M
Ω
1 k
Ω
…950 k
Ω
This profile allows the realisation of a very fast measuring time, e.g. as
required for generator monitoring. Furthermore, this profile can be used
to support fast fault localisation in an IT system. The generator profile is
suitable for AC systems containing DC components.
High capacitance
AC 0…1000 V
3AC 0…690 V
DC 0…1300 V
15…460 Hz
0…1000 μF
± 50 V
0,1 k
Ω
…10 G
Ω
1 k
Ω
…3 G
Ω
For systems with high leakage capacitances, e.g. ship applications, the
impact of leakage capacitances on the measuring result can be signifi-
cantly reduced by selecting this profile.
Inverter > 10 Hz
AC 0…1000 V
3AC 0…690 V
DC 0…1300 V
10…460 Hz
0…20 μF
± 50 V
0,1 k
Ω
…1 M
Ω
1 k
Ω
…950 k
Ω
This profile is used for systems with dynamic frequency control by invert-
ers in the range 10 to 460 Hz in order to optimise the measurement with
respect to the measuring time and quality.
Inverter <10 Hz
AC 0…1000 V
3AC 0…690 V
DC 0…1300 V
0,1…460 Hz
0 …20 μF
± 50 V
0,1 k
Ω
…1 M
Ω
1 k
Ω
…950 k
Ω
For systems involving extremely low frequency control in the range of up
to 0.1...460 Hz and very low and continuously changing extraneous DC
voltages due to dynamic load conditions in an IT system, continuous
insulation monitoring can be optimised using this profile.
*
Customer specific
–
–
–
–
–
–
Allows Bender service to make customer-specific settings. If no settings
are made by Bender service, then the profile has the same parameters as
the "Power circuits" profile.
Switching between profiles
When another profile is selected, the value of R
min
is reset.
Switching between profiles can result in longer measuring times.
* Low frequency mains voltage
For very low frequency networks, the nominal system voltage is reduced
according to the specifications in the chapter "Technical data" .
