Annex; Mcu (Motor Control Unit); Extract From The Technical Description; Application - Siemens 8DJH Installation And Operating Instructions Manual

Annex

Application

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Annex
23

MCU (Motor Control Unit)

23.1

Extract from the Technical Description

The 8DJH can be equipped with different versions of the electrical motor control unit (MCU).
The following sections are an extract from the Technical Description of the electrical motor
control unit.
The complete Technical Description of the different versions is available under the following
order numbers:
MCU version
MCU-RI
MCU-MH
MCU-MH-MOD
23.2 Application
The MCU controls the following motor operating mechanisms for three-position switches in
medium-voltage load-break switchgear:
• Spring-operated mechanism
• Spring-operated/stored-energy mechanism
The MCU is equipped with a universal wide voltage range. It can optionally be connected to
different auxiliary and motor voltages. The auxiliary and motor voltages can be combined and
do not necessarily have to be identical.
23.3

Design, function

Fig. 67: MCU-RI
①
LED status indicator
② Reset pushbutton
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9
Order number
953-0091.9
953-0071.9
953-0081.9
Fig. 68: MCU-MH Fig. 69: MCU-MH-MOD