Input Phase Failure Detection; Input Phase Failure Detection Selection; Control Mode For Small Current; Small Current Detection Hysteresis - Toshiba TOSVERT VF-nC3E Instruction Manual

6.18.6 Input phase failure detection

 : Input phase failure detection selection
 Function
 =  : No tripping (Failure signal FL not activated)
 =  : Phase failure detection is enabled during operation. The inverter will trip if the abnormal voltage
[Parameter setting]

6
Note1: Setting  to  (input phase failure detection: disabled) may result in a breakage of the
Note2: When operating the inverter with DC input, set  =  : (none).

6.18.7 Control mode for small current

 : Small current detection hysteresis
 : Small current trip/alarm selection
 : Small current detection current
 : Small current detection time
 Function
 =  : No tripping (Failure signal FL not activated).
 =  : The inverter will trip (Failure signal FL activated) if a current below the current set with 
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 AC reactor .
status of main circuit capacitor persists for few minutes or more. (Failure signal FL activated)
Title Function

Input phase failure detection selection

capacitor in the inverter main circuit if operation is continued under a heavy load in spite of the
occurrence of an input phase failure.
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.
A small current alarm can be put out by setting the output terminal function selection parameter.
flows for the period of time specified with  .
Adjustment range
0: Disabled, 1: Enabled
F-52
E6582233
Default setting
1