| name | iec61850-domain |
| description | IEC 61850 standard domain knowledge. ALWAYS use when working with IEC 61850 concepts, hierarchy, data model, logical nodes, logical devices, data objects, data attributes, SCL, MMS, or substation automation terminology.
|
| user-invocable | false |
IEC 61850 Domain Knowledge
Product Model (IED hierarchy)
IED → Server → LDevice → LNode (LN) → DataObject (DO) → DataAttribute (DA)
- IED: physical device (relay, controller)
- Server: communication entity exposing data via MMS
- LDevice: logical grouping within a server; must contain LN0
- LNode: fundamental function unit (e.g. PTOC=overcurrent, MMXU=measurement)
- DataObject (DO): specific information within LN; may contain sub-dataobjects (SDOs)
- DataAttribute (DA): leaf level — holds value, quality, timestamp; may be basic (BDA) or structured
Substation Model (functional hierarchy)
Substation → VoltageLevel → Bay → Equipment/Function → SubEquipment/SubFunction
Describes electrical topology independently of which IED hosts the data.
SCL DataTypeTemplates
- LNodeType: template defining which DOs a LN must contain
- DOType: DO structure based on Common Data Classes (CDC)
- DAType: composite DA structure
- EnumType: enumerated value lists
Signal identification (pathname or Reference)
LDName / LNPrefix + LNClass + LNInst . DataName . DataAttributeName
Example: DemoMeasurement/MMXU1.PhV.phsA.cVal.mag
Key concepts
- Hierarchy ensures interoperability across vendors via SCL
- CDC (Common Data Classes) standardize DO structures
Common Logical Nodes (LNode or LN)
- XCBR — Circuit Breaker
- XSWI — Switch
- MMXU — Measurements (voltage, current, power)
- CSWI — Switch Controller
- PTOC — Overcurrent Protection
- LN0 — Logical Node Zero (device management)
