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1. PRECAUTIONS
Use ttte inverter within
the
permissible
Do not attempt Megger test on inverter
ambient temperature range
control circuit
Temperature has a critical influence
on
the ser-
If
insulation reSiStanCe is to
be
measured for the
vice
life of
the
inverter. Ambient tempereture power supply lines and the motor, either discon-
must
be
controll%d.
so
that the inverter is
operated within the permissible temperature
nect the wire at the inverter terminals
or short
the terminals as shown in the illustration below.
range. ~ t s o
see
inverter instakation i n s t ~ t i o n s
and environment.
(Refer
to
page 10.)
{
\.
'
: ? - : A
4 P
i c
Connecting input power to
Uw
output
twninals
of
Uw
inverter, will drmage
the output transistors.
If power supply vonage is
applied
to terminals
U,
V,
and W, the inverter will
be
damaged. Check
the wiring and operation sequence (commercial
power
supply
switching, for
example)
carefully.
Power
supply
a
Do not touch the Inside of the inverter
during
opemtion
The inverter has hgh vokage circuits. Before at-
tempting inspection inside the inverter, discon-
nect power supply
and
be
that the POWER
i m i n e
lamp is
P~~~~
OFF.
(also used
i G G t i n g !amp
as
the
charge
;o:
+H
I# it i n d i t e s
indicating lamp)
hlgh-voltage
remalns
H O W
It takes more than
60
sec
for
discharge
of
the internal capacitor
after disconnecting power supply.
Radio Noiws
The inverter input/ouput circuits (main circuits)
contain high hannonics which may
cause
inter-
ference
Lo
cnmmunicaticm equipment (AM radio)
b3ing
u s e d
near the irrverter.
If
mteriarence oc-
c u m , use
a
noise
f i k r (FR-EIF(-H) option, only
foc
i n p r t
circuit), or line noise filter (FR-BSFO1
optron)
to
reduce radio noise. (For details, refer
to
page
110 to 116).
Inverter
- .
Do not use disconnect switch magnetic
contactor at the inverter output to start
or stop
the
motor (inverter).
If
starYstop of the motor (inverter)
is
repeated
frequently,
it
will
cause
failure of the inverter.
Use
the start slgnal at the inverter.
ON OFF ON OFF
/ , O N
O F &
Power
supply
- . -
-
(
)
Magnetic
mntmor
A
(MC)
U J
Do not connect PF correction capacttor,
surge suppressor, or radio noise filter
(option, FR-BIF) at the output side.
If any of these equipments
is
connected to the
output side
of
the inverter,
it
will damage
the
in-
verter or damage the capacitor or surge
sup-
pressor.
Inverter
%jiE!Oml
capadtor
Grounding
Due to hgh-speed switching operation
of
the
i n -
verter, leakage current will
be increased
corn
pared to conventional inverters. Always ground
the inverter and the motor. When ~~ounding
fhe
invertsr. use
t h e
grounding twmiml
provided
EstaMisk e low
resistawe earlh g m d
8s
close
to
the drive as possible.
Do
not
connect through
pipe threads, slip joints, or other high
resblsnce
paths
to
ground.
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