WX9 ASD Installation and Operation Manual
13
WX9 ASD Characteristics
Over-Current Protection
Each
WX9 ASD
model was designed for a specified operating power range. The WX9 ASD will incur
a trip if the design specifications are exceeded.
However, the
WX9 ASD
may be operated at 120% of the specified output-current range for a limited
amount of time as indicated in the section titled
Voltage/Current Specifications on pg. 202
. Also, the
(
) may be adjusted to help with nuisance over-current trips.
When using the
WX9 ASD
for an application that controls a motor which is rated significantly less than
the maximum current rating of the WX9 ASD, the over-current limit setting will have to be changed to
match the application. See
Motor Overload Protection Level 1
for additional information on this ASD/
motor configuration.
WX9 ASD Capacity
The
WX9 ASD
must not be used with a motor that has a significantly larger capacity, even if the motor
is operated under a small load. A WX9 ASD being used in this way will be susceptible to a high-output
peak current which may result in nuisance tripping.
DO NOT
apply a level of input voltage to a
WX9 ASD
that is beyond that which the WX9 ASD is
rated. The input voltage may be stepped down when required with the use of a step-down transformer or
some other type of voltage reduction system.
Using Vector Control
Using
Vector Control
enables the system to produce very high torque over the entire operating range
even at extremely low speeds.
Vector Control
may be used with or without feedback. However, using
feedback increases the speed accuracy for applications requiring precise speed control. Enabling the
Automatic Energy Savings
further increases the efficiency of the
WX9 ASD
while maintaining its
robust performance.
Vector Control
is not capable of operating multiple motors connected in parallel.
for additional information on using
Vector Control
.
Hand
/
Auto Operation
While running in the
Hand
mode at a non-zero speed, if the RJ45 connector is removed from the
EOI
,
the
WX9 ASD
remains in the
Hand
mode running at the last commanded speed even though the
Hand/
Auto
LED is off. The WX9 ASD output remains at the frequency of the
field at
the time of the disconnect for the duration of the disconnect.
Once reinserted, the reference frequency goes to 0 Hz.
To prevent this condition, before disconnecting the RJ45 connector, ensure that the
WX9 ASD
is off.
CAUTION
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