Function
18
isoHV525_D00297_04_M_XXEN/05.2018
Delay-on release
t
off
The delay on release
t
off
can be set uniformly for all messages using the parameter
"toff", whereby each alarm message specified in the alarm assignment has its own timer
for
t
off
. An alarm will continuously be signalled until the threshold value of the respec-
tive measured value is not exceeded (including hysteresis) for the period of
t
off
without
interruption. Each time the threshold value is not exceeded for the period of
t
off
, the de-
lay on release "toff" restarts again.
Start-up delay
t
After connection to the supply voltage
U
S,
the alarm indication for the preset time
(0…10 s) in the parameter "t" is suppressed.
3.2.2.5
External, combined Test or reset button T/R
Reset = Press the external button < 1.5 s
Reset with subsequent test = Press the external button > 1.5 s
Stop measuring function = Press and hold the external button.
Only one ISOMETER® may be controlled via an external Test/Reset button. A galvanic
parallel connection of several test or reset inputs for testing multiple insulation moni-
toring devices is not allowed.
3.2.2.6
Fault memory
The fault memory can be activated or deactivated with the parameter "M". When the
fault memory is activated, all pending relay alarm messages remain available until they
are deleted using the reset button (internal/external), or the supply voltage
U
s
is turned
off.
The stop function can also be triggered via an interface command and in
this case it can only be reset via the interface.
Summary of Contents for ISOMETER isoHV525
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