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Terminal Box 1xb1634; Preparation; Checking Winding Connections - Siemens 1LA8 Operating & Installation Instructions Manual

Low-voltage motor simotics tn series n-compact.
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6.2.3

Terminal box 1XB1634

Figure 6-4
The connecting cables are introduced into the terminal box 1XB1634 through cable glands
with threaded holes 4 x M80 x 2 and 2 x M25 x 1.5. The cable glands are not included in the
standard scope of supply. The version with onion sealing ring is optional.
For more information, see:
● Inserting the cable into the 1XB16... terminal box with cable gland (Page 75)
● Inserting the cable into the 1XB.. terminal box with ring seal (Page 77)
● Connecting cables with cable lugs (Page 78)
● Connection without cable lugs (Page 79)
6.3

Preparation

6.3.1

Checking winding connections

With an open winding design, i.e. when the windings start and end directly at the terminal box
(see the "Terminal marking" (Page 72) section), the connections are made using jumpers in
the terminal box. The jumpers for the open connection must not be removed when testing the
winding; refer to the relevant circuit diagram.
● Check that the connections (star or delta) comply with the specifications on the rating
● Ensure that the connection values correspond to the information on the rating plate.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017
Terminal box 1XB1634
plate.
Electrical connection
6.3 Preparation
71

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