Air-cooled units

The SINAMICS S120 Cabinet Modules‑2 system comprises Active Line Connection Modules and Motor Modules in chassis‑2 format.

Active Line Connection Modules‑2

Active Line Connection Modules‑2 comprise a Line Connection Module, an Active Interface Module, and an Active Line Module installed in a cabinet system.

Active Line Connection Modules‑2 can supply energy to the intermediate DC circuit and return regenerative energy to the line supply (energy recovery).

Active Line Connection Modules‑2 generate a regulated DC voltage which remains constant despite fluctuations in the line voltage. However, in this case, the line voltage must remain within the permissible tolerance range. Active Line Connection Modules‑2 draw a virtually sinusoidal current from the supply system. Almost no harmonics occur. The total harmonic distortion factors of the current THD(I) and voltage THD(U) are typically in the range of approx. 3 % for rated current. THD(I) is calculated according to IEEE 519 (2014) and THD(U) according to IEC 61000-2-4 (2002). The stringent limit values of IEEE 519 (2014) are typically complied with.

Active Line Connection Modules‑2 always also contain a Clean Power Filter and the required pre-charging input circuit for the Active Line Module.

Active Line Connection Module-2 with Active Interface Module and Active Line Module ≤800 A

Active Line Connection Module-2 with Active Interface Module and Active Line Module >800 A

Motor Modules

Each SINAMICS S120 Cabinet Module‑2 is equipped with a Motor Module in chassis‑2 format and covers the power range from 315 kW to 800 kW (380 V to 480 V). The power rating can be extended up to approx. 4560 kW by connecting up to six Motor Modules in parallel.

General technical specifications

¹⁾ Higher output frequencies available on request.

²⁾ In transport packaging.

Deviations from the specified class are underlined.

Derating data

SINAMICS S120 Cabinet Modules‑2 and the associated system components are rated for an ambient temperature of 40 °C and installation altitudes up to 1000 m above sea level.

At ambient temperatures > 40 °C, the output current must be reduced. Ambient temperatures above 50 °C are not permissible.

At installation altitudes > 1000 m above sea level, it must be taken into account that the air pressure, and therefore air density, decreases as the height increases. As a consequence, the cooling efficiency and the insulation capacity of the air also decrease.

Due to the reduced cooling efficiency, it is necessary to both reduce the ambient temperature and lower heat loss in the Cabinet Module by reducing the output current, whereby ambient temperatures lower than 40 °C may be offset to compensate.

The following table specifies the permissible output currents as a function of the installation altitude and ambient temperature for the various degrees of protection. (The permissible compensation between installation altitude and the ambient temperatures < 40 °C – air intake temperature at the entry to the Cabinet Module – has been taken into account in the specified values.)

The values apply under the precondition that it is guaranteed that the cooling air, as specified in the technical data, flows through the units as a result of the cabinet arrangement.

As an additional measure for installation altitudes from 2000 m up to 5000 m, an isolating transformer is required in order to reduce transient overvoltages according to EN 60664‑1.
For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.

Current derating factors for Cabinet Modules‑2 as a function of the ambient/air intake temperature, the installation altitude and the degree of protection

Current derating for SINAMICS S120 Motor Modules in chassis‑2 format as a function of the pulse frequency

To reduce motor noise or to increase output frequency, the pulse frequency can be increased relative to the factory setting (2.5 kHz). When the pulse frequency is increased, the derating factor of the output current must be taken into account. This derating factor must be applied to the currents specified in the technical specifications.
For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.

Derating factor of the output current as a function of the pulse frequency

Maximum output frequencies achieved by increasing the pulse frequency

The adjustable pulse frequencies – and therefore the output frequencies that can be achieved with the factory-set current controller clock cycles – are listed below.

¹⁾ Higher frequencies on request. For more information, see https://support.industry.siemens.com/cs/document/104020669

Overload capability

SINAMICS S120 Cabinet Modules‑2 have an overload reserve, e.g. to handle breakaway torques. If larger surge loads occur, this must be taken into account in the configuration. For drives with overload requirements, the appropriate base-load current must therefore be used as a basis for the required load.

Permissible overload assumes that the converter is operated at its base-load current before and after the overload occurs, based on a duty cycle duration of 300 s (low overload, high overload) or 60 s (duty cycle S6).

Another precondition is that the Motor Modules are operated at their factory-set pulse frequency at output frequencies >10 Hz.

For temporary, periodic duty cycles with high variations of load within the duty cycle, the relevant sections of the SINAMICS Low Voltage Engineering Manual must be observed.

Motor Modules in chassis‑2 format

Motor Modules with power units in chassis‑2 format can be configured on the basis of different base-load currents.

The base-load current for low overload I_L is based on a duty cycle of 110 % for 60 s.

Low overload

The base-load current for a high overload I_H is based on a duty cycle of 150 % for 60 s.

High overload

The base-load current I_S6 is based on a duty cycle of 200 % for 6 s.

Duty cycle S6 with initial load with a duty cycle duration of 60 s

Active Line Connection Modules‑2

The base-load current I_L is based on a load cycle of 115 % for 60 s with a duty cycle duration of 300 s.

Low overload

The duty cycle with maximum current I_{max_DC} is based on a duty cycle of 150 % for 5 s with a duty cycle duration of 300 s.

Duty cycle with maximum current