Siemens SIMOTICS FD 1LL1, Operating Instructions & Installation Instructions

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6.4 Preparation
6.4.1 Terminal designation
According to IEC / EN 60034‑8, the following basic definitions apply to the terminal
designations for 3-phase machines:
Table 6-1 Terminal designations using the 1U1-1 as an example
1 U 1 - 1 Designation
x
Index for pole assignment for pole-changing machines where applicable. A lower
index signifies a lower speed. Special case for split winding.
x Phase designation U, V, W
x Index for winding start (1) or end (2) or if there is more than one connection per
winding
x Additional indices for cases in which it is obligatory to connect parallel power feed
cables to several terminals with otherwise identical designations
6.4.2 Selecting cables
Take the following criteria into account when selecting the connecting cables:
● Rated current
● Rated voltage
● Possibly a service factor
● System-dependent conditions, such as ambient temperature, routing type, cable cross-
section as defined by required length of cable, etc.
● Requirements according to IEC/EN 60204‑1
● Dimensioning for bundled cable routing, e.g. according to DIN VDE 0298 Part 4 or
IEC 60364-5-52
● Requirements according to IEC/EN 60079-14
● Configuration notes
6.4.3 Connecting the grounding conductor
The grounding conductor cross-section of the machine must be in full conformance with the
installation specifications, e.g. in accordance with EN 60204‑1.
Table 6-2 Determining the cross-section of the grounding conductor
Phase conductor cross-section S
[mm²]
Cross-section of grounding conductor
[mm²]
S > 35 S/2
Electrical connection
6.4 Preparation
SIMOTICS FD 1MH1
Operating Instructions 08/2017
89