IEEE Std C37.248 pdf free download

IEEE Std C37.248 pdf free download.Common Format for Naming Intelligent Electronic Devices (COMDEV).
6. Naming convention
6.1 General
The convention described here defines the fields identified to uniquely name an installed lED. This convention could be used to also name the lED channels (both analog and digital). Information from IEEE Std C37.2TM- 2008 (as summarized in Annex B), IEC 61850 [B3] and IEC 81346 [B5] (as summarized in Annex C), and IEEE Std C37.111TM2013 (as summarized in Annex D) were used in arriving at this proposed naming convention. The intent is to produce a humanly understood name with little effort from which relevant information can be extracted, both with as-low-as-possible chance of error.
6.2 Variability of format with applications
The convention for naming lEDs constitutes a wide array of devices and applications where the names are needed.
Theoretically, an lED can be composed of one channel (such as a temperature monitor) or can contain multiple channels (such as a numerical relay used for feeder or transformer protection).An lED can contain an unlimited number of channels (such as substation automation systems including data concentrators and gateway systems used to combine channels from multiple lEDs and form large composite records for a specific substation or even region). To that extent, the lED name may become far removed from the physical locations of its channels. The lED name may become as small as a single attribute or field (such as company name), which means the burden is then on the channel name to specify all of the remaining fields needed for the user to identify the actual system component that is being sensed or monitored.
For the example of a DFR, the relationship between the lED name and the channel name is dynamic; however, the combination “lED name + channel name” should always comprise a unique sequence that identifies the specific component being monitored.
Many of the applications where names are needed already allow for company name and station identifier. Some applications have identifiers for many of the other quantities that comprise the lED name. To avoid redundancy and preserve space in file names, the lED name can vary from application to application as long as it is understood that the quantities missing from the lED name are available in other places in the application. Clause 7 addresses many of the applications where an lED name is used.
Although many quantities have been identified to name an lED, the instance of many of the quantities actually used together is rare.
6.3 Delimiter
To separate the various parameters for parsing, a delimiter is required. Underscore (_) is chosen as the delimiter in order to minimize conflicts with known applications.
IED Type is the type of the IED (such as a numerical relay, DFR, data concentrator, or virtual device). It should be unique within the substation or protection scheme. For instance, if two A21 relays are used to protect a feeder, one IED Type could be A21A, the otherA21 B. Function Type is the IEEE C37.2 function designation for the device and may also include additional information, such as first or second line protection (primary or backup). Refer to Annex B for details such as multi-function devices. Voltage Level is the kV or a company’s nomenclature for the voltage level(s) of the item(s) being monitored by the IED channels. For example, some companies use letters for voltage classes such as X, which represents 345kV. Where multiple voltage levels are represented such as for a transformer, a dash (-) should be used as the delimiter where permitted by the application.IEEE Std C37.248  pdf download.