Screws And Tightening Torques - Siemens SINAMICS S120 Instruction For Installation In Cabinets For Marine Drive Applications

Mechanical design
Installation of the Active Interface Modules:
The filter modules of the Active Interface Modules have to be mounted to the backside
of a mounting plate (resp. to mounting rails), in correspondence with their fixing holes.
The mounting plate / mounting rails can be mounted to the backside of the cabinet, as
shown in Fig. 1. If installation of the mounting plate / mounting rails to the backside of
the cabinet is not possible, spcial attention has to be paid on a stable mounting of the
mounting plate / mounting rails (see Fig. 2).
Additionally, a fixation of the filter module will be required in the front zone. For that,
the laterally provided fixation bores with diameter 7mm can be used.
The reactor of the Active Interface Module is prepared for installation underneath the
filter module. The reactor has to be mounted underneath on a mounting base or
mounting plate, acc. to their fixation holes. A stable setup and a uniform load
distribution over a large area are essential, owing to the mass of the reactor.
Therefore, the reactor support area on the mounting base or mounting plate on the
reinforced cabinet frame should be as large as possible.
An additional fixation of the reactor in the top zone, with a stable fixation in the bottom
ares is not required .
3.3

Screws and tightening torques

For fabric-base laminates, synthetics, aluminium, copper, captive nuts, welding nuts,
blind rivet nuts, rivet nuts and hard materials (steel), screws of strength class
≥ 8.8 have to be used.
Insofar, as there are no differing specifications mentioned in the technical
documentation, the tightening torques indicated in table 1 shall apply for electrical
and mechanical connections.
Table 1: Tightening torques
Instruction for installation of the liquid-cooled chassis of Sinamics S120 power units into cabinets for marine drive applications,
10
Thread Earth connections, PE-
conductor connection, steel
connections
M3 1.3 Nm
M4 3 Nm
M5 6 Nm
M6 10 Nm
M8 25 Nm
M10 50 Nm
M12 88 Nm
M16 215 Nm
Aluminium connections,
synthetics, conductor rails,
cable shoes
0.8 Nm
1.8 Nm
3 Nm
6 Nm
13 Nm
25 Nm
50 Nm
115 Nm
12/2016, 4BS0808-003