Hfd Reactor - Siemens Simodrive 611 Configuration Manual

6 Infeed Modules

6.5 HFD reactor

6.5 HFD reactor
General
information
!
6-174
For the unregulated 5 kW and 10 kW infeed modules, the commutating reactor
is integrated. With 28 kW, it must be external.
For connection of the regulated infeed/regenerative feedback modules to the
line supply, the HF/HFD reactor tuned to 7 kHz is required (see selection Table
6-12).
The HFD reactors perform the following functions:
S
To limit the harmonics fed back into the line supply
S
Energy store for the step–up operation of the infeed units
S
Current limiting for line supply oscillations
S
Together with a damping resistor, the HFD reactors dampen the system os-
cillations of the converter system. The HF reactors are replaced with the
HFD reactors with damping resistor because they provide increased oper-
ational reliability and a longer lifetime.
The HFD reactor should be mounted as close as possible to the line supply
infeed module.
Caution
The surface of the reactors can reach high temperatures.
The 100 mm clearance above and below the components to ensure air
circulation and cooling must be carefully maintained. If this is not observed,
then the components could prematurely age.
Temperature–sensitive components must be located a sufficient distance away
or thermally partitioned off!
Note
The connecting cables to the NE module must be kept as short as possible
(max. 5 m). For lengths exceeding 1 m, twisted shielded connection lines, with
the shielding contacting ground on both side, should be used. It is preferable
that the cable shield is connected close to the reactor footplate, using a clamp
that completely encompasses the shield
Notice
It is not permissible to use HFD reactors in the motor cable. Operation without a
damping resistor is not permissible, as high voltages (several kV) can occur if
the system oscillates
Note
If commutating reactors are used that have not been released by SIEMENS for
SIMODRIVE 6SN11, harmonics or switching edges not permitted for the
semiconductors can occur that can damage, disturb or early age other
equipment connected to the particular line supply.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
© Siemens AG 2012 All Rights Reserved
02.12
05.01