G9 Asd Characteristics; Over-Current Protection; Asd Capacity; Using Vector Control - Toshiba G9 Installation And Operation Manual

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G9 ASD Characteristics

Over-Current Protection

Each ASD model is designed for a specified operating power range. The ASD will incur a trip if the
design specifications are exceeded.
However, the G9 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
Also, the Stall Prevention Level
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 further information on this parameter, see
Overload Protection Level 1 on pg.

ASD Capacity

The 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. 81
G9 ASD Installation and Operation Manual
may be adjusted to help with nuisance over-current trips (see F601).
182.
for further information on using Vector Control.
Current/Voltage Specifications on pg. 263.
Motor
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