Lenze EDB9300UES - Manual (Page 89)

Transport, Installation and Connection
84 BA8230
•
If a RFI filter is used it should be installed as close as physically possible to the
cubicle feed point, taking the cooling air requirements into account. With this
installation the inverter cubicle may not contain any other unfiltered current circuits
to the motor, e.g. cables for external fans, as otherwise the inverter radio
interference suppression will be limited.
The filtered sections of the cable between the RFI filter and the commutation choke
/ supply terminals in the cubicle are to be screened or laid in armoured steel pipes
or metal ducts (see Fig. 39) to avoid extraneous interference, for example through
the motor cable if closely spaced and
≥
30 cm in length. Under no circumstances
may the RFI filter supply and return leads be placed in the same cable duct. RFI
filters generate currents. According to prEN50178/VDE0160 a PE connection of at
least 10 mm² is required. If other unswitched auxiliary power circuits are included,
separate filtering is to be provided (Example: Uninterruptable auxiliary voltage,
auxiliary supply).
•
To prevent bridging of the RFI filter in the HF range the protective conductor may
not be laid past the RFI filter to PE1 on the 8230 frequency inverter mains
connection. The protective conductor is then connected to the lower terminal PE2
(see Fig. 39).
•
If a mains contactor is fitted, the contactor control cables must be laid separately
from other control cables in the cubicle.
•
The 8230 frequency inverter has a built-in mains rectifier. After a short circuit a DC
fault current can prevent the ELCB-protection switch from being triggered.
Additional measures such as zeroing are therefore necessary or ELCB-protection
switches which are sensitive to all currents can be used (VDE 0160 5.88). When
rating the release current it is important to note that capacitive compensation
currents occurring during operation can cause the interference suppression filters
and cable screens to produce triggers in error. Depending on the filters involved,
currents of up to approx. 300 mA can occur.
Important!
Operation of radio transmitters and radio telephones with a transmitter output capacity
of >2 W is not permitted in the direct proximity of 8230 frequency inverter.
With lower power radio communication equipment and radio telephones operation is
permitted when the 8230 frequency inverter is not open.
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