Signalling Assignment Of The Alarm Relays K1/K2; Measuring And Response Times - Bender ISOMETER isoGEN423 Manual

Function
2.3.8

Signalling assignment of the alarm relays K1/K2

The notifications for 'device error', 'insulation fault', 'undervoltage/overvoltage fault', 'device test' and 'device
start with alarm' can be assigned to the alarm relays via the 'out' menu.
An insulation fault is indicated by the messages '+R1', '–R1', '+R2' and '–R2'. Messages '+R1' and '+R2' indicate
an insulation fault assigned to conductor L1/+, and the messages '–R1' and '–R2' indicate an insulation
fault assigned to conductor L2/–. If an assignment to a conductor is not possible, e.g. due to a symmetrical
insulation fault, the respective '+' and '–' messages are set together.
The message 'test' indicates a device test.
The message 'S.AL' indicates a device start with alarm. When the parameter value is set to 'S.AL = on' and the
supply voltage U is connected, the ISOMETER® starts with the insulation measured value R
s
activated alarms. The alarms will be cleared only when the measured values are up-to-date and no thresholds
are exceeded. In the factory setting 'S.AL = off', the ISOMETER® starts without an alarm.
Recommendation: Set parameter value 'S.AL' identical for both relays.
2.3.9

Measuring and response times

Operating time t
ae
The operating time t
ae
insulation measured value R
as for the faulty conductor L1/+ or L2/- it is dependent on the insulation resistance R
capacitance C . System disturbances may lead to extended measuring times. The measuring time of the
e
nominal system voltage U
Response delay t
on
The response delay t
on
each alarm message specified in the alarm assignment has its own timer for t
interference suppression in the case of short measuring times.
An alarm will only be signalled when a threshold value of the respective measured value is violated for the
duration of t without interruption. Every time the threshold value is violated within the time t
on
delay 'ton' restarts once again.
Total response time t
The total response time t
Delay on release t
off
The delay on release t
message specified in the alarm assignment has its own timer for t
An alarm will continue to be signalled until the threshold value of the respective measured value is no longer
violated (including hysteresis) for the duration of t
longer violated during t
Start-up delay t
After connecting the supply voltage U
't' (0...10 s).
12 isoGEN423_D00221_05_M_XXEN
is the time required by the ISOMETER® to determine the measured value. For the
, the system leakage capacitance C
F
is independent of this and significantly shorter.
n
is set uniformly for all messages in the 't' menu using the parameter 'ton', while
an
is the sum of the operating time t
an
can be set uniformly for all messages using the parameter 'toff', while each alarm
off
, the delay on release 'toff' restarts once again.
off
, the alarm output is suppressed for the time set in parameter
S
, the residual voltages U
e
and the response delay t
ae
.
off
without interruption. Each time a threshold value is no
off
= 0 and sets all
F
and U
L1e L2e
and the system leakage
F
. This delay can be used for
on
, the response
on
.
on
as well