Information model - Arc protection - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Grid automation - Busbar differential protection (high impedance) - Line differential protection - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Interconnection protection - Generator protection - Power management/Load shedding - IEC 61850 Engineering Guide - REX615 Protection and control - PCL1 - IEC - ANSI

The IEC 61850 data model can include up to four logical devices where different logical nodes, representing protection and control functionality, are located. Depending on the selected functionality in the protection relay, different configurations have different sets of logical devices and logical nodes. Data models also include modelling and functionality of settings, setting groups and configuration according to the IEC 61850 concept.

Control logical device, CTRL
Disturbance recorder logical device, DR
Protection logical device, LD0
Sampled measured values sending logical device, MU01, if configured

All generic functionality, such as modelling of physical inputs and outputs as well as the alarming LED functionality, resides under logical device LD0. A full description of the protection relay's data model is available in the parameter list.

CAUTION: During system engineering in the system configuration tool, do not delete or rename logical devices, logical nodes, data objects or data attributes in the IEC 61850 data model.

Figure 1. Example of an IEC 61850 data model of a protection relay

In the IEC 61850 standard, communication services are configured through a number of data structures including data sets, report control blocks, GOOSE control blocks and setting group control blocks. As these data structures pertain to the entire logical device, the standard indicates that they are to be modeled under LLN0, which is a special logical node that describes the common functionality of the logical device. All these data structures are located in logical device LD0 logical node LLN0.

The data model can be exported from PCM600 to an SCL file.