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E154713
C-7
C: Using the IEC61850 Protocol Ethernet Network Server
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
• SSD - System Specification Description: used during the specification stage of a
system to define physical equipment, connections between physical equipment,
and Logical Nodes which will be used by each piece of equipment.
• ICD - IED Capability Description: this is provided by the communication equipment
vendor to specify the features of the equipment and the data model published by
the equipment. Each of the devices in the network has an ICD file which describes
all of the information about the device, for example, IP address on the network and
Com ports. The (vendor supplied) ICD variation of the SCL file contains a Commu-
nication section specifying the lower-layer selectors and default addressing and
also an IED section containing the data model of the device. See Section C.4.2 for
information on the Nexus® 1500+ meter’s .icd file.
• SCD - System Configuration Description: a complete description of the configured
automation system including all devices (for example, meters, breakers, and
relays) and all needed inter-device communications (for example, the measured
parameters and the actions to be performed, such as turning on a relay when a
certain reading is obtained). It can also include elements of the SSD file. The SCD
file is created by a System Configurator, which is a software application that takes
the information from the various devices along with other configuration parameters
and generates the SCD file.
• CID - Configured IED Description: the file used to configure an individual device. It
is a pure subset of the SCD file and a smaller subset of the device’s ICD file. The
CID file describes the exact settings for the device in this particular IEC 61850
network. The Nexus® 1500+ meter’s IEC 61850 Protocol Ethernet Network card
uses a CID file. See Section C.2.2.2 for instructions for uploading the Nexus®
1500+ meter’s .cid file.
Each type of SCL file has different required elements with only the prologue and
Header element required in every file type.
C.1.2.1: Elements of an IEC 61850 Network
• A physical device has a name (IEDname) and consists of one or more AccessPoints.
• An AccessPoint has an IP address and consists of one or more Logical Devices
• A Logical Device contains LLN0 and LPHD1 and optional other Logical Nodes.
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