Siemens SIPROTEC 4 7XT71 Series, Руководство пользователя, Страница: 67 / 122

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 Description
1 Direct current, IEC 60417, 5031
2 Alternating current, IEC 60417, 5032
3 Direct and alternating current, IEC 60417, 5033
4 Earth (ground) terminal, IEC 60417, 5017
5 Protective conductor terminal, IEC 60417, 5019
6 Caution, risk of electric shock
7 Caution, risk of danger, ISO 7000, 0434
8 Protective Insulation, IEC 60417, 5172, Safety Class II devices
9 Guideline 2002/96/EC for electrical and electronic devices
10 Guideline for the Eurasian Market
Preface
SIPROTEC 4/5, Injection unit 7XT71, Manual 5
C53000-B1174-C128-8, Edition 05.2020