Input Phase Loss Detection - Toshiba TOSVERT VF-AS3 Instruction Manual

6. 30. 6

Input phase loss detection

<F608: Input phase loss trip>
■ Function
If the phase loss on the inverter input side is detected and an abnormal ripple voltage persists in the
power circuit capacitor for a certain period of time, a trip occurs. The trip display is "EPHI".
■ Parameter setting
Title Parameter name
F608 Input phase loss trip
■ Difference between the settings
0: Disabled
A trip does not occur. (Failure signal FL disabled)
1: Enabled
If the phase loss is detected during run and an abnormal ripple voltage persists in the power circuit
capacitor for a certain period of time, a trip occurs. (Failure signal FL enabled)
• In case of light-load operation or if the motor capacity is too small for the inverter capacity, input
phase loss may not be detected.
• If the power supply capacity is too large for the inverter capacity (500 kVA or more, and 10
times or more), detection error may occur. In this case, install an input reactor.
• When <F608> = "0: Disabled", if heavy-load operation continues in the phase loss status on the
Important
input side, the power circuit capacitor of inverter may be damaged.
• To operate the inverter with DC input, set <F608: Input phase loss trip> to "0: Disabled".
• How to operate the operation panel -> Refer to [3. 1. 1].
Reference
• How to switch display mode on the operation panel -> Refer to [3. 1. 2].
• Procedure to change parameter setting -> Refer to [4. 2. 3]
F608 : Input phase loss trip
0: Disabled
1: Enabled
Adjustment range
0: Disabled
1: Enabled
6-127
E6582062
STOP 0.0Hz
13:54
Default setting
1
6. [Advanced] How to use parameters
3
4
6
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