Siemens SIPROTEC 4 7XT71 Manual page 67

When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper
action is not taken, death, severe injury or property damage can result:
•
The equipment must be grounded at the grounding terminal before any connections are made.
•
All circuit components connected to the power supply may be subject to dangerous voltage.
•
Hazardous voltages may be present in equipment even after the supply voltage has been disconnected
(capacitors can still be charged).
•
Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the
equipment, ensure that the current-transformer circuits are short-circuited.
•
The limiting values stated in the document must not be exceeded. This must also be considered during
testing and commissioning.
Selection of Used Symbols on the Device
No. Symbol
1
2
3
4
5
6
7
8
9
10
SIPROTEC 4/5, Injection unit 7XT71, Manual
C53000-B1174-C128-8, Edition 05.2020
Description
Direct current, IEC 60417, 5031
Alternating current, IEC 60417, 5032
Direct and alternating current, IEC 60417, 5033
Earth (ground) terminal, IEC 60417, 5017
Protective conductor terminal, IEC 60417, 5019
Caution, risk of electric shock
Caution, risk of danger, ISO 7000, 0434
Protective Insulation, IEC 60417, 5172, Safety Class II devices
Guideline 2002/96/EC for electrical and electronic devices
Guideline for the Eurasian Market
Preface
5