Toshiba TOSVERT VF-S11 Instruction Manual page 166

6.19.6 Input phase failure detection
• Function
6
Note:
: Input phase failure detection mode selection
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.
Therefore, input phase failures cannot always be detected. A trip information
played.
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 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 ten minutes or more. (Failure signal FL activated)
Title Function
Input phase failure detection mode
selection
Setting to (input phase failure detection: disabled) may result in a breakage of the ca-
pacitor in the inverter main circuit if operation is continued under a heavy load in spite of the occur-
rence of an input phase failure.
Adjustment range
0: Disabled, 1: Enabled
F-64
E6581158
will be dis-
Default setting
1