3
Used Symbols
Table 3-1 Used Symbols
No.
1
2
3
4
5
6
7
8
SIPROTEC 4, 20-Hz Band-pass Filter 7XT34, Product Information
C53000-B1174-C130-4, Edition 01.2013
Symbol
Direct current
IEC 60417-5031
Alternating current
IEC 60417-5032
Direct and alternating current
IEC 60417-5033
3-phase alternating current
Ground
IEC 60417-5017
Protective conductor
IEC 60417-5019
Caution, risk of electric shock
Caution, risk of danger
ISO 7000-0434
Description
5