184 H9 ASD Installation and Operation Manual

Overload Reduction Starting Frequency

Program ⇒ Protection ⇒ Overload
This parameter is primarily us ed w ith V /f m o to rs . It is use d to re du c e th e
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 Over load Reduction function aides in
minimizing the generated heat and precluding an Overload trip .
This function is useful in loads such as fans, pum ps, and blowers that have the
square reduction t orque characteri stic.
Set parameter F607 to the desired Overload Time Limit.
Direct Access Number — F606
Parameter Type — Numeri cal
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 mot or 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 overlo ad is greater
than 150%.
Direct Access Number — F607
Parameter Type — Numeri cal
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) resu lts 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 condi tion, 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 — Numeri cal
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 dr ive will trip on a lo w-current fault if the output current of
the drive falls below the l e vel 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