Annex
114/121 Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9
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:
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
Application 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
MCU version Order number
MCU-RI 953-0091.9
MCU-MH 953-0071.9
MCU-MH-MOD 953-0081.9
Fig. 67: MCU-RI Fig. 68: MCU-MH Fig. 69: MCU-MH-MOD
①
LED status indicator
②
Reset pushbutton
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