Toshiba Q9 Plus ASD, Installation & Operation Manual

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E6581611
F-105
6
6.29.6 Input phase failure detection
f608
: 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 failure signal FL will be
activated. Trip display is
eph1 . 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 500kVA or more than 10 times),
detection errors may occur. If this actually happens, install an AC reactor .
f608
=
0
: No tripping. (Failure signal FL not activated)
f608 = 1 : 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
f608 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 f608 = 0 (none).