Toshiba W7 - Manual (Page 13)

W7 ASD Installation and Operation Manual 7
Protection
• 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.
• If using multiple motors provide separate overload protection for each motor and use V/f control.
• External dynamic braking resistors must be thermally protected.
• 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. 65 and Dynamic Braking Enable on pg.
68 .
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.