Re-Cooling Unit Requirements - Siemens SINAMICS GL150 Operating Instructions Manual

The value in the reference for the capacitance per unit length is specified in relation to ground.
During commutation, the capacitances subsequently switch in series via ground, and
capacitances switched in series produce a total capacitance of 1/2 (factor 0.5). C' refers to the
operating cable capacitance.
Effective cable inductance in the case of commutation:
L = L' (in mH/km) * cable length / number of parallel cables
The value in the reference for the conductor inductance refers to one phase. L' refers to the
inductance per unit length of a conductor in a single-phase alternating current system. The
inductance per unit length can be calculated with the assumption that one conductor is used as
the forward line and the other is used as the return line.
You can connect the following maximum number of cables:
● Six parallel cables per phase with 630 mm
● Four parallel cables per phase with 240 mm
Signal cables and other cables
Complete, pre-assembled cable sets are supplied as standard for cabling the power unit, static
excitation equipment, and closed-loop control. The cable-related cabinet distances can be
specified for the project.
Shield support
Observe the notes in Chapter "Connecting the power unit (Page 97)".
Reference
Heinold, Lothar (publ.): Kabel und Leitungen für Starkstrom I. Publicis Corporate Publishing
1987
4.1.5

Re-cooling unit requirements

The re-cooling unit must comply with the following requirements:
● The raw water to be supplied by the plant flows through the heat exchanger that cools the
● The design of the re-cooling unit is part of the system integration. This affects, in particular,
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE
deionized water. To limit the volume of the deionized water, a re-cooling unit with a dual-
circuit system is required. Limit the deionized water circuit to the re-cooling unit and the
drive.
deviations from the required environmental conditions, such as aggressive cooling water.
Use heat exchanger plates made of titanium for aggressive cooling water, such as sea
water or high chloride content. If necessary, also consider an increased corrosion for the
design.
4.1 Notes for system integrators
at one water-cooled converter
2
at one air-cooled converter
2
Preparations for use
67