Connection Without Terminal Box; Connecting The Machine For A Specific Direction Of Rotation - Siemens SIMOTICS FD 1MH1 Operating Instructions & Installation Instructions

6.4.5

Connection without terminal box

If the machine was ordered without terminal box (where the cables are simply brought out of
the motor), then the proper connection must be made in an external terminal box.
Incorrect dimensioning
Faults can occur if the appropriate technical data is not complied with when connecting up.
For instance, degree of protection, minimum air and creepage distances. These faults can
result in eventual or immediate death, serious injury or material damage.
● Ensure that the external terminal box is dimensioned according to the data on the rating
If the motor has been ordered with brought-out leads, in this case you must comply with the
relevant conditions for Zone 2. It is assumed that the buyer, the installer and users of the
installation are familiar with these conditions and will carefully observe them.
6.4.6

Connecting the machine for a specific direction of rotation

If the machine has one shaft extension or two shaft extensions with different diameters, the
direction of rotation when looking at the front of the single or the thicker shaft extension is
defined as follows:
● If you connect the power cables in the phase sequence L1, L2, L3 to U, V, W, the resulting
● If you interchange two connections, e.g. L1, L2, L3 to W, V, U, the resulting rotation will be
● On machines which are only allowed to run in one direction, the rating plate shows an arrow
NOTICE
Incorrect direction of rotation
The machine will not be adequately cooled if it is operated other than how it was originally
ordered or with the incorrect direction of rotation. This can result in machine damage.
Observe the direction of rotation data on the nameplate.
SIMOTICS FD 1MH1
Operating Instructions 08/2017
WARNING
plate and is suitable for the respective use.
rotation will be clockwise.
counter-clockwise.
which indicates the permitted direction of rotation, and it also specifies the terminal
connections in the required phase sequence.
Electrical connection
6.4 Preparation
91