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Function
13
isoHV525_D00297_04_M_XXEN/05.2018
3.1.2.2
Malfunction
In addition to the described self test, several functions in the insulation monitoring de-
vice are continuously checked during operation. If the error occurs again after restar-
ting the device, then contact Bender Service.
3.1.2.3
Signalling assignment of the alarm relays K1/K2
Pre-alarm and test are assigned to relay 1 ("K1"). The main alarm and device fault are as-
signed to relay 2 ("K2").
3.1.2.4
Measuring and response times
The measuring time is the period essential for the detection of the measured value. The
measuring time is reflected in the operating time
t
ae
. The measuring time for the insu-
lation resistance value is mainly determined by the required measuring pulse duration,
which depends on the insulation resistance and system leakage capacitance of the sys-
tem to be monitored. The measuring pulse is produced by the measuring voltage ge-
nerator, which is integrated in the ISOMETER®. System disturbances may lead to
extended measuring times.
Operating time
t
ae
The operating time
t
ae
is the time required by the ISOMETER® to determine the meas-
ured value. For the measured insulation resistance value, it is dependent on the insula-
tion resistance and the system leakage capacitance.
3.1.2.5
External, combined Test or Reset button T/R
Reset= Press the external button < 1.5 s
Reset followed by a 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 monito-
ring devices is not allowed.
Содержание ISOMETER isoHV525
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