Option L04 (Infeed Module Dimensioned One Rating Class Lower) - Siemens SINAMICS G130 Engineering Manual

SINAMICS S150
Engineering Information
When two motor reactors are connected in series, the permissible cable lengths can be increased even further to
525 m with shielded cables and 787 m with unshielded cables.
A second motor reactor is not a standard option and may require an additional cabinet. A second motor reactor is
therefore available only on request.

8.9 Option L04 (Infeed Module dimensioned one rating class lower)

The purpose of option L04 is to allow the selection of an Infeed Module (Active Line Module ALM + Active Interface
Module AIM) for the SINAMICS S150 cabinet unit which is dimensioned one rating class lower than the Motor
Module.
This option is available for power outputs 160 kW, 250 kW, 315 kW, 400 kW and 560 kW in the line voltage range
380 V to 480 V 3AC.
Option L04 can be employed meaningfully for applications where the Infeed Module of the SINAMICS S150 would
have an unnecessarily high current or power reserve in the standard design. Examples of these are:
·
Applications in which the Motor Module of the S150 is operated at higher pulse frequencies. In this instance,
the output current and output power are reduced according to the unit-specific current derating factor k
which means that the input power can be reduced accordingly. Generally speaking, option L04 can be
meaningfully employed for pulse frequencies that are twice the factory setting or higher.
·
Applications in which the S150 works only in generator mode and the system losses are not covered by the
mains supply, but by the generator operating on the Motor Module. In this case, the input power is reduced
by an amount corresponding to the system losses.
·
Applications with motors which have a very low power factor as compared to typical 2-pole and 4-pole
asynchronous motors. In this case, the reactive component in the motor current covered by the DC link is
relatively high, while the active component in the motor current covered by the Infeed Module becomes
relatively small. The input power can therefore be reduced accordingly. As a general rule, option L04 can be
meaningfully employed on motors with 8 poles or more.
·
Applications which only require a high torque and thus a high motor current below the rated point of the
motor. A typical example are drives which require a high breakaway torque.
When option L04 is selected, the S150 should only be operated with a line-side power factor of cosφ
only draws active power from the supply system. This power factor is provided with the factory setting. It is not
meaningful to provide additional reactive power compensation on the supply system because the input power is
reduced by option L04.
Because the Infeed Module of the S150 (Active Line Module ALM + Active Interface Module AIM) represents the
component which limits the achievable output power of the S150 when option L04 is selected, the Motor Module's
output currents stated in the technical data can be fully utilized only as long as the Infeed Module can supply the
required power or current from the supply system.
The calculation formulae by which the line current required by the S150 can be calculated from the required
mechanical shaft power of the motor can be found in section "Active Infeed" in chapter "Fundamental Principles and
System Description". These formulae can be used to determine whether it is possible to use option L04.
The following table states the permissible input and output currents of a standard model of SINAMICS S150 and a
SINAMICS S150 on which option L04 is selected.
Output power of SINAMICS S150
standard model at 400 V
[kW]
160
250
315
400
560
SINAMICS S150: Permissible output currents and input currents on standard models and with option L04
SINAMICS Engineering Manual – November 2015
492/528
Ó Siemens AG
Permissible output current
[A]
310
490
605
745
985
Permissible input current
Standard model
[A]
310
490
605
745
985
Pulse
= 1, so that it
Line
With option L04
[A]
260
380
490
605
840