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Safety Information and Precautions
W7B ASD Installation & Operation Manual
purposeful or inadvertent actions of workers.
Insulators, machine guards, and electrical
safeguards are to be inspected (and tested
where possible) at installation and periodically
after installation for potential hazardous
conditions.
• DO NOT allow personnel near rotating
machinery. Warning signs to this effect shall be
posted at or near the machinery.
• DO NOT allow personnel near exposed
electrical conductors. Contact with electrical
conductors can be fatal. Warning signs to this
effect shall be posted at or near the hazard.
• Personal Protection Equipment (PPE) shall
be provided and used to protect employees
from any hazards inherent to system operation.
System Setup Requirements
DANGER
• When using the ASD as an integral part of a
larger system, it is the responsibility of the
ASD installer/maintenance personnel to ensure
that there is a fail-safe in place (i.e., an
arrangement designed to switch the system to
a safe condition if there is a fault or failure).
• The failure of external or ancillary
components may cause intermittent system
operation (i.e., the system may start the motor
without warning).
• Power factor improvement/correction
capacitors or surge absorbers MUST NOT be
installed on the output of the ASD.
• Use of the built-in system protective features
is highly recommended (i.e., E-Off, Overload
Protection, etc.).
• The operating controls and system status
indicators should be clearly readable and
6
positioned where the operator can see them
without obstruction.
• Additional warnings and notifications shall be
posted at the equipment installation location as
deemed required by
Qualified
CAUTION
• System safety features should be designed
and employed into the integrated system in a
manner such that system operation, even in the
event of system failure, will not cause harm or
result in system damage or injury to personnel
(i.e., E-Off, Auto-restart settings, System
Interlocks, etc.)
• The programming setup and system
configuration of the ASD may allow it to start
the motor unexpectedly. A familiarity with the
Auto-restart and the Hand/Auto settings and
function is a requirement to use this product.
• There may be thermal or physical properties,
or ancillary devices integrated into the overall
system that may allow for the ASD to start the
motor without warning. Signs to this effect must
be posted at the equipment installation
location.
• If a secondary magnetic contactor (MC) or
an ASD output disconnect is used between the
ASD and the load, it should be interlocked to
halt the ASD before the secondary contact
opens. If the output contactor is used for
bypass operation it must be interlocked such
that commercial power is never applied to the
ASD output terminals (U, V, W).
• When using an ASD output disconnect, the
ASD and the motor must be stopped before the
disconnect is either opened or closed. Closing
the output disconnect while the 3-phase output
of the ASD is active may result in equipment
damage or injury to personnel.
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Personnel.
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