Lenze 7812 User Manual

checked: 19.04.89 MB 33.0831 GB
page: 32
Cautic‘n
!
In case of mains overvoltagethe 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 interferencesuppression
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

Lenze 7812 Specifications

General

Brand	Lenze
Model	7812
Category	DC Drives
Language	English