• Protective function
The following
protection
functions
are
built in to
protect
the inverter. If the
protective
circuit
functions.
the
inverter
output
will stop,
alarm
will
display,
and
alarm
signal
will be
output
The
motor
will
coast
to a stop. The inverter
must
be
reset to
resume
operations.
Function name
Details
Display
(Key pad)
The protective circuit functions during
During acceleration
~,~
,
(OCl)
acceleration, deceleration or
constant
""
Overcurrent speed when the motor
output
current
During
constant
speed
cr,
(OC,)
shut
down exceeded approximately 200% of the
rated current, and the inverter
output
During deceleration
"n
(OC3)
stops. "
....
Regenerative
The protective circuit functions when the DC voltage in the main
overvcltaae
circuit of the inverter exceeds the
trip
point with the regenerative
n
r
(OVT)
c c ,
shut
down
energy during braking, and the inverter
output
stops.
Overload
The electronic thermal relay in the inverter detects overheating of
shut down
the
motor
caused by overload or the additional heating
at
low
(
Electronic
Motor
speeds due to fan action, and stops the inverter
output.
Install
f:.:r:
(THM)
thermal
a thermal relay on the
output
side of the inverter when Using a 6
relay)
or more pole motor Or when groups of motors are connected to
(*
1)
one drive.
-56-
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