3RH, 3TX, LZX coupling links
SIRIUS System Manual
GWA 4NEB 430 0999-02b
6-11
Mechanical require-
ments
• Construction type, width
• Mounting type
• Indicators
• Connection type
• Replaceability
Selection table
The following table provides an overview of the main criteria for selection
from different device groups:
Device group Criteria for selection
Two-tier coupling links • Space-saving due to narrow housing width
• Test switches
Coupling links in box terminal
format
• Low device height
• For installation given narrow tier spacing
Contactor relays for switching
main and auxiliary circuits
• High switching currents
• Direct switching of motors up to 11 kW
• Up to 4 auxiliary contacts
Plug-in relay coupling links • High switching currents
• Quickly interchangeable
• Up to 4 changeover contacts
Coupling links for attachment
to contactors
• Attachable directly onto the contactor
• Technical specifications of the contactor to be con-
trolled
Table 6-4: Selection criteria for the 3RH, 3TX, and LZX coupling links
To Next Page
General
