E6581595
F-47
6
6.16.6 Input phase failure detection
: Input phase failure detection selection
Function
This parameter detects inverter input Phase failure. If the abnormal voltage status of main circuit
capacitor persists for few minutes or more, the tripping function and the FL relay will be activated.
Trip display is
. Detection may not be possible when operating with a light load, or when the
motor capacity is smaller than the inverter capacity.
If the power capacity is larger than the inverter capacity (more than 200kVA or more than 10 times),
detection errors may occur. If this actually happens, install an input AC or DC reactor .
=
: No tripping (Failure signal FL not activated)
=
: Phase failure detection is enabled during operation. The inverter will trip if the abnormal voltage
status of main circuit capacitor persists for few minutes or more. (Failure signal FL activated)
[Parameter setting]
Title
Function
Adjustment range
Default setting
Input phase failure detection selection
0: Disabled, 1: Enabled
1
Note1: Setting
to
(input phase failure detection: disabled) may result in a breakage of the
capacitor in the inverter main circuit if operation is continued under a heavy load in spite of the
occurrence of an input phase failure.
Note2: Parameter
f608
is invalid for single-phase input model.
Note3: When operating the inverter with DC input, set
=
: (none).
6.16.7 Control mode for small current
: Small current detection hysteresis
: Small current trip/alarm selection
: Small current detection current
: Small current detection time
Function
If the output current falls below the value set at
and doesn’t return above
+
for a time that exceeds the value set at
, tripping or output alarm will be activated.
is displayed in the event of a trip.
=
: No tripping (Failure signal FL not activated).
A small current alarm can be put out by setting the output terminal function selection parameter.
=
: The inverter will trip (Failure signal FL activated) if a current below the current set with
flows for the period of time specified with
.
