ACE-tronics G9 ASD Installation and Operation Manual 177
ASD Output Phase Failure Detection
Program Protection Phase Loss
This parameter Enables/Disables the monitoring of each phase of the 3-phase
output signal (U, V, or W) of the ASD. If either line is missing, inactive, or not
of the specified level for one second or more, the ASD incurs a trip.
Note: Autotune checks for phase failures regardless of this setting.
Settings:
Disabled (No Detection)
Enabled (Run at Startup and Retry)
Enabled (Every Run Command and Retry)
Enabled (During Run)
Enabled (At Startup and During Run)
Enabled (Detects an ALL-PHASE Failure ONLY - Will Not Trip, Restarts at
Reconnect)
Direct Access Number — F605
Parameter Type — Selection List
Factory Default — Disabled
Changeable During Run — No
Overload Reduction Start 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:
Disabled
Enabled
Direct Access Number — F608
Parameter Type — Selection List
Factory Default — Enabled
Changeable During Run — No
F605 F608
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