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6.3
Note
Note
Note
Note
Note
Note
1)
2)
3)
4)
5)
6)
The
applicable
equipment
in
the
table
above
refers
to
Hitachi
standard
3-phase
4-pole
squirrel~-cage
motor.
Select
a circuit
breaker
while
studying
the
breaking
capacity.
Adjust
the
RC value
of
thermal
relay
to
the
rated
current
value
of
motor.
The
inverter
leak
current
is
approx.
3 mA/unit.
(Not
including
the
wiring)
No
thermal
relay
is required
when
the
standard
applicable
motor
(Hitachi
standard
3-phase
4-pole
squirrel
cage
motor)
is used
at more
than
10 Hz,
less
than
60 Hz.
Select
the
breaking
capacity
with
consideration
given
to
the
power
supply
and
wiring
system.
Wiring
precautions
For
wiring
connections,
note
the
following.
(1)
If an
electromagnetic
contactor
is
inserted
between
the
inverter
and
motor
for
start
and
stop,
a rush
start
current
flow
is
caused,
letting
excessive
current
flow,
thereby
giving
rise
to
overcurrent
tripping
of
the
inverter.
Repeated
operation
may
damage
the
element;
therefore,
avoid
inserting
an
electromagnetic
contactor
where
applicable.
When
it
is
used,
be
sure
to
turn
it
ON
after
both
the
in-
verter
and
motor
stop.
a 78s
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