ABB UNO-DM-3.3-TL-PLUS Product Manual page 15

Symbol
5
10
DC
AC
Description
Indicates a risk of electric shock. Stored energy discharge time: 5 minutes
Indicates a risk of electric shock. Stored energy discharge time: 10
minutes
Direct Current
Alternating current
With insulation transformer
Without insulation transformer
Positive pole of the input voltage (DC)
Negative pole of the input voltage (DC)
Indicates the centre of gravity of the equipment.
Indicates the requirement to wear acoustic protection devices in order to
prevent damage to hearing
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1- Introduction and general information