Bender ISOMETER isoHV525, Руководство пользователя

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Function
17 isoHV525_D00297_04_M_XXEN/05.2018
3.2.2.2 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 or after restoring the factory settings, please contact Bender Service.
3.2.2.3 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
assigned to relay 2 ("K2").
3.2.2.4 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
R
F
and system leakage capacitance C
e
of
the system to be monitored. Measuring pulse is produced by the measuring pulse ge-
nerator integrated in the ISOMETER®. The measuring times for
C
e
, U
L1e
, U
L2e
and R % are
synchronous. System disturbances may lead to extended measuring times. In contrast,
the time for the nominal system voltage measurement
U
n
is independent and consi-
derably shorter.
Response delay
t
on
The response delay t
on
can be set uniformly for all messages using the parameter "ton",
whereby each alarm message specified in the alarm assignment has its own timer for
t
on
. This delay time can be used for interference suppression in the case of short measu-
ring times. An alarm will only be signalled when a threshold value of the respective
measured value is exceeded for the period of
t
on
without interruption. Every time the
threshold value is violated within the time t
on
, the response delay "ton" restarts once
again.
Operating time
t
ae
The operating time t
ae
is the time required by the ISOMETER® to determine the measu-
red value. For the measured insulation resistance value, it is dependent on the insulati-
on resistance
R
F
and the system leakage capacitance C
e
.
Total response time
t
an
The total response time t
an
is the sum of the operating time t
ae
and the response delay
time t
on
.