Fuji Electric FRENIC-AQUA series, User Manual

Page: 123 / 751

4-16
(4) Protective functions
Item
LED
monitor
displays:
Description Remarks
AC fuse blown ACF Stops the converter output if the AC fuse
(R-/T-phase only) is blown.
AC overvoltage AOV Stops the converter output upon detection of an
AC overvoltage condition.
AC undervoltage ALV Stops the converter output upon detection of an
AC undervoltage condition.
AC overcurrent AOC Stops the converter output if the peak value of
the input current exceeds the overcurrent level.
AC input current error ACE Stops the converter output upon detection of the
excessive deviation of the AC reactor from the
AC input.
Input phase loss LPV Stops the converter output upon detection of an
input phase loss.
Synchronous power
frequency error
FrE After the MC for charging circuit (73) is turned
on, the converter checks the power frequency. If
it detects a power frequency error, this function
stops the converter output. An error during
converter running (e.g., momentary power
failure) triggers no alarm.
DC fuse blown dCF Stops the converter output if the DC fuse (P
side) is blown.
18.5 kW or above
DC overvoltage dOV Stops the converter output upon detection of a
DC overvoltage condition.
If a power failure continues for a long time and
the control power source is shut down, this
alarm is automatically reset.
400 V class series:
800 V
±
5 V
DC undervoltage dLV Stops the converter output upon detection of a
DC undervoltage condition.
If a power failure continues for a long time and
the control power source is shut down, this
alarm is automatically reset.
400 V class series:
Stops at 371 V,
restarts at 417 V.
Charging circuit fault PbF Stops the converter output upon detection of a
charging circuit fault, provided that the
answerback signal from 73 is enabled.
Condition:
73ANS
(Answerback from 73)
is assigned to terminal
[X1].
Heat sink overheat OH1 Stops the converter output upon detection of a
heat sink overheat.
External alarm OH2 Stops the converter output upon receipt of an
external signal THR .
Condition: THR
(Enable external alarm
trip) is assigned to
terminal [X1].
Converter internal
overheat
OH3 Stops the converter output upon detection of an
internal overheat of the converter.
Converter overload OLU Stops the converter output with the inverse-time
characteristics due to the input current.
Activate at 105%,
150% for 1 min