Chapter 2 Wiring of V 810
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the protective conductors must be calculated or selected from the table (all according to
STN 33 2000-5-54). The ground point should be as close as possible to the inverter and the
wire length should be as short as possible. The following requirements must be met in TN
networks:
(5) The source resistance of the source node shall not be greater than 5 Ω. A maximum of
15 Ω is permitted in difficult soil conditions.
(6) The total ground resistance of PEN conductors (including conductors leaving the
transformed and grounded point) for networks with a voltage of 230 V AC shall not exceed
2 Ω.
(7) The PEN conductor in the TN-C network or the PE conductor in the TN-S network must
be earthed by a separate earthing switch or by connection to an existing system. The
individual groundings of the PEN and PE conductors should have a ground resistance of no
more than 15Ω. The earth resistance at the neutral point at the neutral point at the
neutral point should not exceed 5 Ω.
(8) Meet the wiring requirements of each terminal, the correct choice of accessories such
as potentiometers, voltmeters, power supplies, cables, terminals, etc.
(9) After completing the connection and checking that everything is connected correctly,
the power can be turned on.
(10) The total length of the line should be a maximum of 100 m. Especially with a more
remote connection, the current limiting function may be reduced or the device or
equipment connected on the output side of the inverter may malfunction or the charging
current may be affected due to the long electrical installation. Therefore, note the total
cable length. When dimensioning the output cables to the motor, it is recommended to
use shielded cables of the type e.g. NYCY 3 x cross section, NYCWY 3 x cross section, or
ÖLFLEX® 4G, to minimize radio frequency interference.
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