Metering Equipment Symbols - Siemens US2:9810T24V User Manual

Metering equipment symbols

The following IEC 60417 and ISO 7000 symbols may be used on the metering equipment:
Symbol
* There may be national differences concerning the use of this symbol.
** Protective class equipment requirements are outlined in IEC 61140.
Reference Title and description
Earth; ground
IEC 60417-5017
To identify an earth (ground) terminal in cases where
neither the symbol 5018 nor 5019 is explicitly required.
Functional earthing; functional grounding (US) *
To identify a functional earthing (grounding) terminal, for
IEC 60417-5018
example, of a specially designed earthing (grounding)
system to avoid causing malfunction of the equipment.
Protective class I; Protective earth/ground
To identify any terminal which is intended for connection
IEC 60417-5019
to an external conductor for protection against electric
shock in case of a fault, or the terminal of a protective
earth (ground) electrode.
Protective class II equipment **
To identify equipment meeting the safety requirements
IEC 60417-5172
specified for Class II equipment (double or reinforced
insulation).
Caution, refer to accompanying documents
To indicate that caution is necessary when operating the
device or control close to where the symbol is placed. To
ISO 7000-0434B
indicate that the current situation needs operator
awareness or operator action in order to avoid
undesirable consequences.
Operator's manual; operating instructions
To identify the location where the operator's manual is
stored or to identify information that relates to the
ISO 7000-1641
operating instructions. To indicate operating instructions
should be considered when operating the device or
operating controls close to where the symbol is placed.