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System Characteristics
W7B ASD Installation & Operation Manual
system should be used. A common type of motor
braking systems used with the ASD are DC
Injection Braking and Dynamic Braking.
For additional information on braking systems, see
DC Injection Braking on pg.
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 ASD may be operated at 100% of the
specified output-current range continuously or at
120% for a limited time as indicated in the section
titled
Current/Voltage Specifications on pg.
Also, the
Stall Prevention Level on pg. 143
may be adjusted to help with nuisance over-current
trips.
12
99.
194.
setting
When using the ASD for an application to control a
motor which 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.
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 if required with
the use of a step-down transformer or some other
type of voltage-reduction system.
https://www.toshiba.com/tic/
143.
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