184
H9 ASD Installation and Operation Manual
Overload Reduction Starting Frequency
Program
Protection
Overload
This parameter is primarily used with V/f motors. It is used to reduce the
starting frequency at which the
Overload Reduction
function begins and is
useful during extremely low-speed motor operation.
During very low-speed operation the cooling efficiency of the motor decreases.
Lowering the start frequency of the
Overload Reduction
function aides in
minimizing the generated heat and precluding an
Overload
trip.
This function is useful in loads such as fans, pumps, and blowers that have the
square reduction torque characteristic.
Set parameter
F607
to the desired
Overload Time Limit
.
Direct Access Number — F606
Parameter Type —
Numerical
Factory Default —
6.00
Changeable During Run —
Yes
Minimum — 0.00
Maximum — 30.00
Units — Hz
Motor 150% Overload Time Limit
Program
Protection
Overload
This parameter establishes a time that the motor may operate at 150% of its
rated current before tripping. This setting applies the time/150% reference to
the individual settings of each motor (e.g., this setting references 150% of the
F600
setting for the 1 motor).
The unit will trip sooner than the time entered here if the overload is greater
than 150%.
Direct Access Number — F607
Parameter Type —
Numerical
Factory Default —
300
Changeable During Run —
Yes
Minimum — 10
Maximum — 2400
Units — Seconds
ASD Input Phase Failure Detection
Program
Protection
Phase Loss
This parameter enables the 3-phase input power phase loss detection feature. A
loss of either input phase (R, S, or T) results in a trip.
Settings:
0 — Disabled
1 — Enabled
Direct Access Number — F608
Parameter Type —
Selection List
Factory Default —
Enabled
Changeable During Run —
No
Low-Current Detection Current Hysteresis Width
Program
Protection
Low-Current Settings
During a momentary low-current condition, this parameter provides a current
threshold level to which the low-current condition must return within the time
setting of
F612
or a
Low-Current Trip
will be incurred.
Direct Access Number — F609
Parameter Type —
Numerical
Factory Default —
10
Changeable During Run —
Yes
Minimum — 1
Maximum — 20
Units — %
Low-Current Trip
Program
Protection
Low-Current Settings
This parameter
Enables/Disables
the low-current trip feature.
When enabled, the drive will trip on a low-current fault if the output current of
the drive falls below the level defined at
F611
and remains there for the time set
at
F612
.
Settings:
0 — Disabled
1 — Enabled
Direct Access Number — F610
Parameter Type —
Selection List
Factory Default —
Disabled
Changeable During Run —
No
F606
F610
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