Current Hardware Protection Settings; Oc Suppression Function; Led “00” Digit: Oc Protection Disturbing Suppression; Led “00” Digit: Overexcitation Control - Veichi AC300 Series Technical Manual

AC300 Series Vector Control Inverter Manual

OC suppression function:

The OC suppression function can monitor the real-time load current, and automatically limit it below the set of OC
suppression point, to prevent the fault trip caused by excessive current.To some large inertia or sharp changing load,
the function is especially valid..
0: Suppression valid
1: ACC/DEC valid, constant speed invalid
OC suppression point:
Set current limit level(By stopping ACC/DEC or decreasing/ increasing output frequency to control the output
current).
OC suppression gain:
Adjust the response speed of OC suppression.
Note: Using this function might prolong ACC/DEC time.During the process of inverter start/ stop , if in the case
of high current,the output frequency will not ACC/DEC to the given frequency as expected d,which shows that
the limiting function,.At that time, please reduce the load or adjust relevant parameters.
F10.03

Current hardware protection settings

Setting range: 0000-0221
LED "0"digit: cycle-by-cycle current limit:
cycle-by-cycle current limit can limit current rise to a certain extent by hardware protection so that the current does
not exceed the protection value of the inverter and avoid skipping flow fault shutdown.
0: Close
1: Open
LED "00" digit: OC protection disturbing suppression
While this function is valid, invert will judge the E. OC alarm intelligently to eliminate the disturbance, and only make
the alarm to the real fault signal. This function may delay the alarm time, and please use it cautiously.
0: Off
1: First grade disturbing suppression
2: Second grade disturbing suppression
LED "000" digit: SC protection First grade disturbing suppression
While this function is valid, invert will judge the E. SC alarm intelligently to eliminate the disturbance, and only make
the alarm to the real fault signal. This function may delay the alarm time, and please use it cautiously.
0: Off
1: First grade disturbing suppression
2: Second grade disturbing suppression
LED "0000" digit: Reserved
F10.04-F10.05 Reserved
Function Parameter Specifications
Factory set: 0001
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AC300 Series Vector Control Inverter Manual
F10.06 Bus over voltage suppression protection
LED "0" digit: Over voltage suppression control
0: Prohibited
1: Valid in DEC
2: Valid both in ACC/DEC
Select whether DEC OV suppression is valid :If this function is valid,when bus voltage reaches or exceeds
[F10.07] when inverter DEC running, the inverter will slow down or stop DEC, thus ensuring there's no OV protection
due to high bus voltage.
Select whether ACC OV suppression is valid :If this function is valid,when bus voltage reaches or exceeds
[F10.07] when inverter ACC running, the inverter will automatically adjust the operating frequency and suppress the bus
voltage from increasing, thus ensuring there's no OV protection due to high bus voltage. This function is special valid to
eccentric load.
LED "00" digit: Overexcitation control
0: Off
1: On
LED "000" digit: Reserved
LED "0000" digit: Reserved
Note: When using the energy consumption setting functions, please turn off or turn on the overvoltage
suppression control according to the site conditions.
T3: 650-780 (default 750)
F10.07 Bus over voltage suppression point
T2/S2: 340-380 (default 365)
F10.08 Bus over voltage suppression gain Setting range: 0.0-500.0%
When bus voltage reaches or exceeds [F10.07] when inverter running, the inverter will automatically adjust the
operating frequency and suppress the bus voltage from increasing, thus ensuring there's no OV protection due to high
bus voltage. Adjusting [F10.08] can promote OV suppression effect; set [F10.08] = 0: cut-off OV suppression function
and OV suppression is valid for any motor control mode.
Function Parameter Specifications
Setting range: 0000-0012 Factory set: 0012
Factory default: 128.0%
Factory default: 100.0%
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