SIEMENS
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Siemens D 15.1 · 2017
Description of Options
Description of options
4
■
Options
(continued)
L03
EMC filter
Drives with CE mark require an EMC line filter. With option
L03
,
the filter will be installed downstream from the 3-phase control
power disconnect switch. Control power cables from the cus-
tomer's system are routed inside the metal cable duct and are
connected at the control power disconnect switch.
Note:
Option
L03
is required for the CE mark, and is included in option
U02
. For drive units supplied from Nuremberg, Germany, these
must be ordered with CE mark. As a consequence, option
L03
is not
separately available.
L09
Output reactor (only for sync.)
Air-cooled drives are supplied with a reactor cabinet included in
the drive lineup with the same degree of protection as the drive.
L29
Bidirectional synchronized bypass operation
Option
L29
offers automatic synchronization with seamless
transfer of the motor to the line and take-over of the motor from
the line. The drive synchronizes the motor to the line voltage
(phase, frequency and amplitude). The motor is then connected
in parallel to the line with the S3 circuit breaker before the output-
side S2 circuit breaker opens.
Circuit breakers
The response time constants of the two circuit breakers (opening
and closing times) are approximately 100 ms. The motor is trans-
ferred from the drive to the line within this time. This ensures a
bumpless transfer of the motor to the line.
If the motor is to be subsequently transferred from the line back
to the drive, the transfer process is executed in the reverse order.
The drive is first run up in no-load operation and its output
voltage is synchronized to the line voltage with respect to phase,
frequency and amplitude. Then S2 circuit breaker is closed
before S3 is opened and the motor is isolated from the line. This
means that the drive bumplessly takes over the motor, which can
either be operated with closed-loop speed control or shut down
in a controlled fashion. As a result of the variable-speed opera-
tion while starting or shutting down, no high starting torques or
torque fluctuations are generated, which could damage the
drive train or cause e.g. pressure fluctuations in the process. The
S3 circuit breaker must be configured to protect the motor
against overcurrents and overvoltages during line operation.
If the motor has integrated temperature sensors, these must be
monitored independently (plant-side) during line operation.
An output reactor (option
L09
) is additionally required to
decouple the drive output during the commutation process.
Note:
The circuit breakers are not included in the scope of delivery.
Contact the factory or your local Siemens sales representative
when it comes to dimensioning the output reactor (option
L09
)
and the circuit breakers. A motor protection relay should also be
installed in the bypass circuit.
L50
Cabinet lighting and service socket outlet
If option L50 is chosen, a universal lamp and a service socket
outlet (Schuko version) are installed in the control cabinet.
The power supply for the cabinet lighting and socket outlet is
provided externally. The cabinet lighting is switched on manually
using a switch.
M
S1
S3
S2
G_D012_XX_00024
© Siemens AG 2017