Page, Jiue potentiometer – Lenze Range 7800 User Manual
Page 33
checked:
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32
Cautic‘n
!
In
case
of
mains
overvoltage
the
braking
chopper
niay be
actlvated.
When USlflg resistors without overload protection the reslstor(s)
may
burn-out.
Theretore
only
resistars
with
integrated
er
external
bemperature surveillance devices must be lnstalled.
Since
temperatures
approaching
350C
may occur
at the surfaces of
the. brake
resistors,
lt
is recom~ended that the resistors be additionally installed into a
flreproot hous Ing.
lt the external brake resistor is connected according to the diagram
an
page
11,
the
TRIP
indication
„OLl“
is displayed in case ot
overload.
Since
the interterence niay have been
caused by
mains
overvoltage,
the inverter must
be
disconnected
from the mains
within
20 seconds.
13.
Radio
interference
suppression
lt
is permissible to use the controllers wlthout radio
inter-
ference
suppression in electrical systems within connected
operation rooms,
commercial premises or
industrial plants,
provided that the
limit values
according to VDIE 0871/6.78,
dass
B are not exceeded.
(See
CISPR
publicatiens
11,
CENELEC
HD
344).
The units
should only be
used
in
compliance
with
local regulations.
In
order
to
iniprove the electromag~etic
compatibiuity
(ENG)
of
sensitive equipment,
e.g.
a PLC,
the motor cables
U,
V,
W and
the
cantrol
cables
should be screened.
Apply the screen
to
both
ends.
Ta
ensure
that the screening is
effeotive
lt should not be
opened
or
interrupted.
lt
should also begin
as
dose
to
the device
as
possible
and be
placed directly an
the motor
terminal board.
The earth
chassis
connection
requires
special attention;
lt
should
have as
bw
a
resistance
and
as
large a cross—section
as possible.
14.
Part nmnbers
Inverter
7811
7812
7813
7814
part
no.
329
167
329
1681
329
169
329
170
Inverter
7815
7816
7817
7818
part
na.
329 171
329 172j
329
173
329
174
15.
Ite~ns
si~p~ led
:-~c::~ücc1 descriptf an
•
-•
•
jiue potentiometer
1
k~72/1W.
l4ains chokes,
semiconductor fuses
and fuse halders
must be ordered
separately.
ET4 6/fa