Siemens siprotec SJ62 User Manual page 705

Glossary
GPS
Ground
Grounding
Grounding
Hierarchy level
HV field description
HV project descrip-
tion
ID
ID_S
IEC
IEC Address
IEC communication
branch
IEC61850
Initialization string
703
Global Positioning System. Satellites with atomic clocks on board orbit the earth twice
a day in different parts in approx. 20,000 km. They transmit signals which also contain
the GPS universal time. The GPS receiver determines its own position from the
signals received. From its position it can derive the running time of a satellite and thus
correct the transmitted GPS universal time.
The conductive ground whose electric potential can be set equal to zero in any point.
In the area of ground electrodes the ground can have a potential deviating from zero.
The term "Ground reference plane" is often used for this state.
Grounding means that a conductive part is to connect via a grounding system to →
ground.
Grounding is the total of all means and measured used for grounding.
Within a structure with higher-level and lower-level objects a hierarchy level is a con-
tainer of equivalent objects.
The HV project description file contains details of fields which exist in a ModPara
project. The actual field information of each field is memorized in a HV field description
file. Within the HV project description file, each field is allocated such a HV field de-
scription file by a reference to the file name.
All data are exported once the configuration and parameterization of PCUs and sub-
modules using ModPara has been completed. This data is split up into several files.
One file contains details about the fundamental project structure. This also includes,
for example, information detailing which fields exist in this project. This file is called a
HV project description file.
Internal double-point indication → Double-point indication
Internal double point indication intermediate position 00 → Double-point indication
International Electrotechnical Commission
Within an IEC bus a unique IEC address has to be assigned to each SIPROTEC 4
device. A total of 254 IEC addresses are available for each IEC bus.
Within an IEC communication branch the users communicate on the basis of the
IEC60-870-5-103 protocol via an IEC bus.
Worldwide communication standard for communication in substations. This standard
allows devices from different manufacturers to interoperate on the station bus. Data
transfer is accomplished through an Ethernet network.
An initialization string comprises a range of modem-specific commands. These are
transmitted to the modem within the framework of modem initialization. The com-
mands can, for example, force specific settings for the modem.
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015