6
Q7 ASD Installation and Operation Manual
three or more power conductors are run in the same conduit (refer to 2005 NEC Article 310
adjustment factors).
Note:
National and local codes should be referenced when running more than three
conductors in the same conduit.
•
Ensure that the 3-phase input power is Not connected to the output of the ASD. This will damage
the ASD and may cause injury to personnel.
•
Do not install the ASD if it is damaged or if it is missing any component(s).
•
Do Not connect resistors across terminals PA – PC or PO – PC. This may cause a fire.
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Ensure the correct phase sequence and the desired direction of motor rotation in the Bypass mode
(if applicable).
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Turn the power on only after attaching and/or securing the front cover.
Protection
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Ensure that primary protection exists for the input wiring to the equipment. This protection must be
able to interrupt the available fault current from the power line. The equipment may or may not be
equipped with an input disconnect (option).
•
All cable entry openings must be sealed to reduce the risk of entry by vermin and to allow for
maximum cooling efficiency.
•
Follow all warnings and precautions and do not exceed equipment ratings.
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If using multiple motors provide separate overload protection for each motor and use V/f control.
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External dynamic braking resistors must be thermally protected.
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It is the responsibility of the person installing the ASD or the electrical maintenance personnel to
setup the Emergency Off braking system of the ASD. The function of the Emergency Off braking
function is to remove output power from the drive in the event of an emergency. A supplemental
braking system may also be engaged in the event of an emergency.
For further information on
braking systems, see
DC Injection Braking Current on pg. 57
and
.
Note:
A supplemental emergency stopping system should be used with the ASD. Emergency
stopping should not be a task of the ASD alone.
•
Follow all warnings and precautions and do not exceed equipment ratings.
System Integration Precautions
The following precautions are provided as general guidelines for the setup of the ASD within the
system.
•
The Toshiba ASD is a general-purpose product. It is a system component only and the system
design should take this into consideration. Please contact your Toshiba sales representative for
application-specific information or for training support.
•
The Toshiba ASD is part of a larger system and the safe operation of the ASD will depend on
observing certain precautions and performing proper system integration.
•
A detailed system analysis and job safety analysis should be performed by the systems designer
and/or systems integrator before the installation of the ASD component. Contact your Toshiba sales
representative for options availability and for application-specific system integration information if
required.