TAVRIDA ELECTRIC ISM Shell_2 Series, Руководство по применению

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6
Malfunction Indication Table
The self-monitoring system inside the CM detects eventual malfunctions and report them via the MALFUNCTION
LED with various blink signals. The meaning of the blink codes and the variations per type of malfunction are
shown in the following table.
Error
group
Malfunction
LED blinks
Function, type
of malfunction
Description of malfunction
variants
Recommendation
for malfunction
elimination
Affected
CM
External
error
1 blink signal,
then 1.5 s
pause, periodic
(about 4 mi
The power supply
has failed for
>1.5 s
The operating range of the power
supply of the CM, depending on the
type of voltage, its value and switch
command, is between 65-70% and
125% (Trip commands) and 80-125%
(Close commands) of the nominal
voltage. With continuous failure of
the power supply, the blink signals
continue until the capacitors are
unloaded.
- Switch on MCB
- Check for cable
break
- Check terminal
connections
All CM
2 blink signals,
then 1.5 s
pause, periodic
The Close or Trip-
command of the
CM is carried out
but the correspon-
ding ISM position
signal is missing.
Malfunction variant 1: The Close
command of the CM is carried out
by the ISM. The normally open ISM
auxiliary switch S13 has been brid-
ged already due to a malfunction be-
fore the Close command was given
(despite the existing malfunction,
the ISM can be switched off again by
the CM. This deletes the malfunction
indication although the malfunction
still exists).
- Check for short
circuit in the
cable
- Check for short
circuited terminals
- Check ISM posi-
tion switch S13
All CM
Malfunction variant 2: The Trip
command of the CM is carried out
by the ISM. The normally closed ISM
auxiliary switch S13 has been inter-
rupted due to a malfunction (the
ISM can only be placed in the close
position after the malfunction has
been eliminated).
- Check for cable
break
- Check terminal
connections
- Check ISM posi-
tion switch S13
The Close com-
mand of the CM is
not carried out as
the ISM is electri-
cally locked in OFF
position.
Malfunction variant 3: The Close
command of the CM is not carried
out by the ISM as the closing lock-
out contact in ISM S13 auxiliary
switch circuit is open. The malfunc-
tion indication has been purposely
taken into account.
Closing of the ISM
is only possible if
closing lock-out
contact is closed.
The Close or Trip
command of the
CM is not carried
out by the ISM as
the ISM is mecha-
nically
locked in the
particular position.
Malfunction variant 4: The Close
command of the CM is not carried
out by the ISM as it is mechanically
locked in the OFF position.
Delete malfunction
with Trip command.
The ISM can only
be closed when the
mechanical lock has
been removed.
Malfunction variant 5: The Trip
command of the CM is not carried
out by the ISM as it is mechanically
locked in the ON position.
Remove the
mechanical lock
of the ISM.