DOLD RN 5897/320 Переклад оригінальної інструкції - Сторінка 3
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Function
Behaviour with internal device faults
If internal device faults were detected during the test function, the status
LED flashes permanently red. The indicator relays K1 and K2 switch to
the alarm state.
Behavior on faulty connection
When detecting broken wire on terminals L1(+)/L2(-), the measurement
is disabled. The reaction time could be up to 2 min. The monitoring relays
K1 and K2 go in alarm state, the status LED shows flash code 1 in red
colour. After removing the interruption the fault is automatically reset
(max. reaction time up to 2 min) and the measurement of the insulation
resistance is continued. Stored alarm values remain stored. An interruption
of the protective earth connections PE1/PE2 causes the same reaction
as interrupting the measuring circuit, only the status LED shows flash
code 2 in red colour.
External control input
To terminals X1/X2 an external combined Test-/Reset button can be
connected. If the terminals X1/X2 are bridged for approx. > 1,5 s and <
10 s the test mode is started. This has the same function as pressing the
internal test button. When bridging X1/X2 for < 1,5 s, a stored alarm will
be reset. This has the same function as pressing the internal reset button.
If X1/X2 is activated for > 10 s, the measuring function is stopped.
The measuring function remains suspended for the duration of the control
of X1/X2.
Programming/setting of parameters/set-up of the insulation monitor
All settings are made via 3 rotational switches on the front of the device.
To avoid unauthorised manipulation of the settings, the unit has a sealable
transparent cover on the front.
With the first rotational switch "R
In addition the rotational switch has 2 sections. If the rotational switch is in the
first section the broken wire detection of the measuring circuit is continuously
on. If the rotational switch is in the second section it is continuously off. The
second rotational switch "R
" has also 2 sections and selects the pre alarm
pA
value as well as the output function. in section 1 the unit is de-energised on
trip (n.c.) in section 2 on energised on trip (n.o.).
The third rotational switch selects "UN" selects the voltage system connection
and manual or auto reset it has also 2 sections. In section one the unit is on
auto reset, in section 2 it is on manual reset. Changes of the setting the unit
accepts immediately without restart.
" the response value for Alarm is selected.
A
Function Diagram
U H
R
E
Earth fault
R
pA
R
A
Hysteresis function
21-24
Open circuit operation
21-22
21-24
De-energized on trip
21-22
11-14
Open circuit operation
11-12
11-14
De-energized on trip
11-12
Manual reset
Reset
21-24
Open circuit operation
21-22
21-24
De-energized on trip
21-22
11-14
Open circuit operation
11-12
11-14
De-energized on trip
11-12
Flashing Codes Status LED
measuring function
disabled
self test
extended
test
internal
system error
connection failure
measuring ciruit L(+)/L(-)
connection failure
protective conductor PE1/PE2
3
t
t
M11593
t
M12104
06.05.21 en / 393A