Ad%O I::terfe~Er~Ce Sud~'Ree:i1Qn - Lenze 7812 Technical Description

ET4 6/fa
Cautic'n
In case of mains overvoltage
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
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,
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
is permissible to use the controllers wlthout radio inter-
lt
ference suppression in electrical systems within connected
operation rooms, commercial premises or industrial plants,
provided that the
dass B are not exceeded.
CENELEC HD 344). The units should only be used in compliance with
local regulations.
In order to
sensitive equipment, e.g. a PLC, the motor cables U, V, W and
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.
and be placed directly an the motor terminal board. The earth chassis
connection
resistance and as large a cross—section as possible.
Part nmnbers
14.
Ite~ns si~p~ led
15.
:-~c::~ücc1 descriptf an
jiue potentiometer
• -• •
l4ains chokes,
separately.
!
checked: 19.04.89
the TRIP indication
limit values according to VDIE 0871/6.78,
iniprove the electromag~etic compatibiuity (ENG) of
lt
should also begin as dose to the device as possible
requires special attention; lt
Inverter 7811
part no. 329 167
Inverter 7815
part na. 329 171
semiconductor fuses and fuse halders must be ordered
MB 33.0831 GB
the braking chopper
is displayed in case ot
„OLl"
publicatiens
(See
CISPR
7812
329 1681
7816
329 172j
1 k~72/1W.
page:
niay be actlvated.
resistors, lt
11,
should have as bw a
7814
7813
329 169
329 170
7817 7818
329 173
329 174
32
the