Schrack Technik CX plus Series FRACXP06R-, Руководство пользователя

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68
P
ROBLEMS DURING THE
AI /
CANCELLATION OF THE
AI
If the automatic initialisation cannot identify the phase angle during a maximum of 4 cycles, the AI is
cancelled with error message:
The messages
Ai
and
abrt
are shown alternatingly on the display.
The control was switched off by the AI (
“OFF”): The messages “PFC” and “OFF” are shown
alternatingly on the display.
Possible causes:
1) The measuring current was too small. The current transformer ratio may be too large or the
stage sizes are too small.

Check the current transformer ratio; select a transformer with the appropriate transmission
ratio, if necessary. Start the AI gain.
2) Heavy load fluctuations during the automatic initialisation

Start the AI again when the mains is steadier.
3) No stages identified at the stage outputs. Check fuses and power contactors. Start the AI again.
If the AI is not successful after several attempts, the correct phase correction angle must be entered
manually (SETUP/206). The not occupied stage outputs can be set to the stage type
“
FOFF
” manually
(SETUP/100/OUt).
Instruction regarding the setting of the phase correction angle:
A table with the phase correction angles depending on the connection of measuring voltage and current
can be found in the
Annex, paragraph setting of phase correction angles .
If a phase angle equal to or greater than 360° results by adding 180°, subtract 180° instead.
Example:
Previously set phase correction angle = 270°
270° + 180° = 450°

greater than 360°

270° - 180° = 90°

phase correction angle to be set
NOTE: If the automatic initialisation was cancelled with error once, the control is switched off. After the
repeated start and the successful execution of the AI or by manually setting the phase correction angle
and setting the stage types of the not occupied switching outputs to
“FOFF”, the control
(SETUP/100/PFC or SETUP/310) must explicitly be switched on again by switching the setting to
“ON”.
The stage types of the individual switching outputs (SETUP/100/Out or SETUP/403) should be checked
after the AI with regard to whether all connected stages are still set to the stage type
“AUTO” and all
not connected stages are set to
“FOFF”. These may have to be corrected manually. If the automatic
initialisation was activated in the SETUP/100/AI or SETUP/207 resp. for as long as the setting is
activated (AI was not started yet) or for as long as the AI is being executed (
Ai
is shown on the display
in the top line in the main menu), the MANUAL menu remains locked. It is not possible to switch the
stages manually.