ACE-tronics G9 ASD Installation and Operation Manual
13
ASD Characteristics
Over-Current Protection
Each ACE-tronics G9 ASD is designed for a specified operating power range. The ASD will incur a trip if
the design specifications are exceeded.
However, the ASD may be operated at 115% of the specified output-current range continuously (or 110%
continuously if
≥
60 HP for the 230-volt system or if
≥
125 HP for the 460-volt system) or at 150% for a
limited amount of time as indicated in the section titled
Current/Voltage Specifications on pg. 270
. Also,
the
Stall Prevention Level
may be adjusted to help with nuisance over-current trips (see
F601
).
When using the ASD for an application to control a motor that is rated significantly less than the
maximum current rating of the ASD, the over-current limit (Thermal Overload Protection) setting will
have to be changed to match the FLA of the motor. For additional information on this parameter, see
Motor Overload Protection Level 1 on pg. 175
.
ASD Capacity
The ACE-tronics G9 ASD must not be used with a motor that has a larger capacity than the ASD, even if
the motor is operated under a small load. An 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 an ASD that is beyond that which the 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.
See
F015 on pg. 85
for additional information on using Vector Control.
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