IEC TR 61850-90-30:2025

IEC TR 61850-90-30 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Communication networks and systems for power utility automation –
Part 90-30: IEC 61850 Function Modelling in SCL

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IEC TR 61850-90-30 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Communication networks and systems for power utility automation –

Part 90-30: IEC 61850 Function Modelling in SCL

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200  ISBN 978-2-8327-0068-6

– 2 – IEC TR 61850-90-30:2025 © IEC 2025
CONTENTS
FOREWORD . 11
INTRODUCTION . 13
1 Scope . 14
1.1 General . 14
1.2 Published versions of this standard and related namespace name . 14
1.3 Identification of the Code Components . 15
1.3.1 IEC 61850-6-100 XML namespace compliant with IEC 61850-6:2018
edition 2 amendment 1 . 15
1.3.2 IEC 61850-6-100 XML namespace compliant with IEC 61850-6:2024
edition 2 amendment 2 . 16
1.3.3 IEC/TR 61850-90-30 SSD example . 16
1.4 Code Component Distribution . 16
1.4.1 General . 16
1.4.2 SCL extension namespace code component . 17
1.4.3 SSD example code component . 17
2 Normative references . 17
3 Terms and definitions . 18
4 Functions and Applications . 19
4.1 General . 19
4.2 Functions . 19
4.3 Application Schemes . 19
4.4 Examples of Functions and Applications . 21
4.4.1 General . 21
4.4.2 1 ½ Breaker Control Application . 21
4.4.3 Breaker Failure Application . 21
4.4.4 Power Measurement Application . 22
4.4.5 Power Transformer Applications . 23
5 SCL extension representation concepts . 26
5.1 General . 26
5.2 PathName . 26
5.3 SCL Location . 27
5.4 Condition for attribute presence . 27
6 Data Flow inside and between Functions . 28
6.1 General . 28
6.2 Data Flow . 28
6.2.1 General . 28
6.2.2 SCL Location . 28
6.2.3 SourceRef . 28
6.2.4 ControlRef . 31
6.2.5 SourceRef and ControlRef connection . 32
6.3 Data flow resolution . 35
6.3.1 General . 35
6.3.2 SCL Location . 37
6.3.3 SubscriberLNode . 37
6.3.4 ControllingLNode . 37
6.4 Service-related Elements . 38
6.4.1 SpecServiceType . 38

6.4.2 ServiceSpecifications . 40
7 LNode Data specification . 53
7.1 SCL Location . 53
7.2 General . 53
7.3 Specification of Data Objects and Attributes . 53
7.3.1 General . 53
7.3.2 DOS/SDS/DAS Definition . 53
7.4 LNode Mapping Documentation . 57
8 LNodeSpecNaming . 58
8.1 SCL Location . 58
8.2 Definition . 58
9 ProcessResource . 60
9.1 SCL Location . 60
9.2 Definition . 60
9.3 SCL representation . 67
9.3.1 General . 67
9.3.2 ProcessResources . 67
9.3.3 ProcessResource . 67
9.3.4 Resource . 68
10 PowerSystemRelation . 70
10.1 SCL Location . 70
10.2 Definition . 70
10.3 SCL representation . 72
10.3.1 General . 72
10.3.2 PowerSystemRelations . 72
10.3.3 PowerSystemRelation . 72
11 SCL elements reference and categorisation . 73
11.1 General . 73
11.2 Function Reference . 73
11.2.1 General . 73
11.2.2 FunctionRef . 73
11.2.3 FunctionCatRef. 74
11.3 FunctionCategory. 74
11.3.1 SCL Location . 74
11.3.2 General . 74
11.3.3 SCL representation . 75
11.4 Allocation Role . 76
11.4.1 SCL Location . 76
11.4.2 Definition . 76
11.4.3 Example 1 . 77
11.4.4 Example 2 . 79
11.4.5 Example 3 . 81
12 Variables . 82
12.1 SCL Location . 82
12.2 Definition . 82
12.3 SCL representation . 84
12.3.1 General . 84
12.3.2 Variable . 84

– 4 – IEC TR 61850-90-30:2025 © IEC 2025
12.3.3 VariableApplyTo . 85
13 Behavior description . 88
13.1 SCL Location . 88
13.2 Definition . 88
13.3 SCL representation . 89
13.3.1 General . 89
13.3.2 BehaviorDescription . 89
13.3.3 InputVar and OutputVar . 91
13.3.4 IEC 61131 BehaviorDescription use cases . 93
14 Process Echo . 95
14.1 SCL location . 95
14.2 Definition and rules . 95
14.3 Use cases . 96
14.3.1 Use case 1: circuit breaker position transmission . 96
14.3.2 Use case 2: measurement transmission . 97
15 Bay Type . 98
15.1 SCL location . 98
15.2 Definition . 98
16 Specification Workflow, tools and file types . 98
16.1 FSD . 98
16.1.1 Definition and rules . 98
16.1.2 SCL content . 99
16.1.3 FunctionTemplate . 99
16.1.4 Usage . 100
16.2 SSD Template . 101
16.3 S-IED . 101
16.3.1 General . 101
16.3.2 Logical Node and Function Allocation . 101
16.3.3 S-IED as formal Specification . 102
16.3.4 S-IEDs for Testing and Simulation . 102
16.3.5 S-IED identification inside an SCL file. 103
16.3.6 From Functional Specification to the S-IED . 103
16.3.7 ISD . 104
16.4 Process SCL files . 107
16.4.1 General . 107
16.4.2 Process ICD . 107
16.4.3 Process IID . 110
16.4.4 Instantiating a process ICD/IID in an SCD – Implementation rules . 112
16.4.5 Documenting the implementation of the IED to the specification . 114
16.5 Engineering Rights applied to functions . 131
16.5.1 Definition . 131
16.5.2 Rules from IEC 61850-6 . 131
16.5.3 The SCC file format . 132
16.5.4 The project ID . 133
16.5.5 The checkout ID . 134
16.5.6 Combining SCC and SED workflows . 143
16.5.7 Additional example adding SCL references . 144
16.5.8 Use cases . 146

16.5.9 Rules regarding engineering rights on process section elements . 150
16.6 Information flow between tools . 151
16.6.1 General . 151
16.6.2 Response of a process ICD to a system specification or IED
specification template . 151
16.6.3 Response of a process IID to a project SCD . 151
16.6.4 Response of a process IID to a project specific ISD/SSD . 152
16.6.5 Response of a process ICD to an SSD with allocation roles . 152
16.6.6 Global overview of tools and interfaces . 152
17 SclFileReferences extension . 153
17.1 General . 153
17.2 Use of the SclFileReference for FSD . 154
17.3 Use of SclFileReference for ASD . 154
17.4 Use of other references . 155
17.4.1 General . 155
17.4.2 SclFileReference for SSD in ISD . 155
17.4.3 SclFileReference for ISD in ICD . 156
17.4.4 SclFileReference for ISD in SCD . 156
17.4.5 SclFileReference for ISD in IID . 156
17.4.6 SclFileReference for ICD in IID . 156
17.4.7 SclFileReference for ICD in SCD . 156
17.4.8 SclFileReference for IID in SCD . 157
17.4.9 SclFileReference for SCD in IID. 157
17.4.10 SclFileReference for SSD in SCD . 157
17.4.11 SclFileReference for SCD in SED/SCC . 157
17.4.12 CheckoutID from SED/SCC in SCD/SED/SCC . 157
17.4.13 SclFileReference for SSD in ICD . 157
17.4.14 SclFileReference for IID in SSD . 158
17.4.15 SclFileReference for SSD in SSD . 158
18 UUIDs . 158
18.1 General . 158
18.2 Scenario 1: . 160
18.2.1 General . 160
18.2.2 Subscenario 1: zoom on ASD . 160
18.2.3 Subscenario 2: creating the project SSD . 162
18.2.4 Subscenario 3: creating the process ICD . 163
18.2.5 Subscenario 4: creating SCD . 164
18.3 Other examples . 165
18.3.1 General . 165
18.3.2 Scenario 2 . 166
18.3.3 Scenario 3 . 166
Annex A (informative) Predefined Function classifications . 167
A.1 Overview . 167
A.2 Basic Function Categories . 167
A.3 Protection . 167
A.4 Automation . 168
A.5 Extended Function Categories . 169
A.6 Function scope . 169

– 6 – IEC TR 61850-90-30:2025 © IEC 2025
Annex B (informative) Service section rules for ISD files service section rules for ISD
files . 170
Annex C (informative) Management of different Schema version . 180
C.1 General . 180
C.2 Upgrading rules from 2019B9 to 2019C1 . 180
C.3 Downgrading rules from 2019C1 to 2019B9 . 181
Annex D (informative) Example SCL File . 183
Bibliography . 184

Figure 1 – Breaker Failure Protection from IEC TR 61850-7-500 . 20
Figure 2 – Breaker Failure Application . 20
Figure 3 – 1 ½ Breaker Functions . 21
Figure 4 – Breaker Failure Application . 22
Figure 5 – Power Measurement Application . 23
Figure 6 – 3 Transformer Differential Protection . 24
Figure 7 – 3 Transformer Winding Overcurrent Protection . 25
Figure 8 – 3 Transformer Voltage Control . 26
Figure 9 – Absolute PathName Examples with Object Reference . 27
Figure 10 – Data Flow specification with SourceRefs inside a Function. 29
Figure 11 – Data Flow specification for data exchange between Functions . 29
Figure 12 – Example of a SourceRef and ControlRef connection . 33
Figure 13 – Example of open SourceRef and ControlRef . 33
Figure 14 – Example of a connected SourceRef and ControlRef (source and controlled
are set) . 34
Figure 15 – Example of an implemented SourceRef and ControlRef (extRefAddr and
extCtrlAddr are set) . 35
Figure 16 – SubscriberLNode and ControllingLNode definition example . 36
Figure 17 – SubscriberLNode and ControllingLNode selection example . 36
Figure 18 – SubscriberLNode and ControllingLNode resolution example . 36
Figure 19 – Example of service specification within a SourceRef element . 38
Figure 20 – Example of service specification within a SubscriberLN element . 39
Figure 21 – Example of a GooseParameters specification . 43
Figure 22 – Example for referencing a GooseParameters . 43
Figure 23 – Specification of a binary Wired oriented connection . 46
Figure 24 – Specification of a binary Wired oriented connection (visual representation) . 46
Figure 25 – Implementation of the LPDI/LPDO . 47
Figure 26 – Example of BinaryWiringParameters . 48
Figure 27 – Example of Wired Input and Output specification for XCBR . 49
Figure 28 – Example of the implementation of the XCBR wiring specification . 50
Figure 29 – Specification of an analogue Wired oriented connection . 51
Figure 30 – Specification of an analogue Wired oriented connection (visual
representation) . 51
Figure 31 – Implementation of an analogue Wired oriented connection specification . 52
Figure 32 – Example of AnalogueWiringParameters . 53
Figure 33 – Example of Control Model specification . 55

Figure 34 – Example of PTOC Setting Groups specification . 56
Figure 35 – Example of array values specification . 57
Figure 36 – Example LNodeSpecNaming . 59
Figure 37 – Application Template definition with ProcessResource . 61
Figure 38 – Application instance with ProcessResource resolution . 62
Figure 39 – CB interlocking equation . 63
Figure 40 – Application template . 63
Figure 41 – Example Application with ProcessResource . 64
Figure 42 – Using ProcessResource for SourceRef parameterization . 65
Figure 43 – ProcessResource resolution to set SourceRef source . 65
Figure 44 – Using ProcessResource with SubscriberLNode . 66
Figure 45 – ProcessResource resolution with SubscriberLNode . 67
Figure 46 – Example of ProcessResource usage for CBR usage . 69
Figure 47 – Example of ProcessResource usage for CT usage . 70
Figure 48 – Function and SubFunctions related to the Process Section . 71
Figure 49 – 1 1/2 breaker control and protection application . 72
Figure 50 – SCL support for Function classification (example) . 75
Figure 51 – Example of Function Classification in SCL . 76
Figure 52 – Example of Allocation roles with PIU . 78
Figure 53 – Example of Allocation roles without Bay Controller CB Interface . 79
Figure 54 – Allocation variant use case . 80
Figure 55 – Allocation Variant use case representation in XML . 81
Figure 56 – Auto recloser multiple allocation example . 82
Figure 57 – Variables in the Process Section . 83
Figure 58 – Example of variable to manage XCBR prefix . 83
Figure 59 – Example of variable to manage specification of functional name . 83
Figure 60 – Example of variable to manage DA value . 84
Figure 61 – Example of Variable setting directly the Circuit Breaker prefix . 86
Figure 62 – Example of Variable value set by an XPath expression. . 87
Figure 63 – Example of Variables used for Setting Group definition . 87
Figure 64 – Behavior description in a Bay . 89
Figure 65 – Behavior description location . 89
Figure 66 – Example of BehaviorDescription in a single LNode . 93
Figure 67 – Example of floating BehaviorDescription . 94
Figure 68 – Example P21 BehaviorDescription. 95
Figure 69 – Example of ProcessEcho for XCBR.Pos transmission . 97
Figure 70 – Example of ProcessEcho for measurement transmission . 98
Figure 71 – FSD usage in specification process . 100
Figure 72 – SSD Template . 101
Figure 73 – IED Allocation . 102
Figure 74 – Function Structure mapped to S-IEDs . 102
Figure 75 – Process IID workflow . 112
Figure 76 – Process ICD with ISD workflow . 113

– 8 – IEC TR 61850-90-30:2025 © IEC 2025
Figure 77 – Process ICD without ISD workflow . 113
Figure 78 – Process ICD with ISD from SSD template workflow . 113
Figure 79 – BehaviorDescription implementation documentation . 114
Figure 80 – Multiple LNodes instantiation by one LN . 115
Figure 81 – specification of binary inputs function . 116
Figure 82 – Process ICD content with mapping documentation . 117
Figure 83 – Single LNode implemented by multiple LN . 118
Figure 84 – SourceRef implementation in same LN documentation . 119
Figure 85 – SourceRef implementation in a GGIO documentation . 120
Figure 86 – SourceRef implementation in a TCTR documentation . 120
Figure 87 – Example of SourceRef mapping to real IED . 121
Figure 88 – Example of real IED used to implement SourceRef . 122
Figure 89 – Concept of mapping SourceRef to ExtRef . 123
Figure 90 – SourceRef definition based on DO . 124
Figure 91 – Using granularity for better SourceRef creation . 124
Figure 92 – SourceRef definition for same DO at DA level . 125
Figure 93 – SourceRef definition at DO level for reporting communication . 125
Figure 94 – 1 to 1 implementation of SourceRef. 126
Figure 95 – Using intAddr for mapping SourceRef to ExtRef . 127
Figure 96 – Match documentation between ExtRef and SourceRef . 127
Figure 97 – Choosing position ExtRef as mapping of SourceRef . 128
Figure 98 – Example of same intAddr . 129
Figure 99 – Using extRefAddr for SMV mapping . 129
Figure 100 – Use of extCtrlAddr example . 130
Figure 101 – Deviating DO/DA mapping documentation . 131
Figure 102 – SED exchange . 131
Figure 103 – Engineering rights rules from IEC 61850-6:2009+AMD2:2024 . 132
Figure 104 – SCC/SED concept . 132
Figure 105 – SCC concept . 133
Figure 106 – project UUID . 134
Figure 107 – SCC workflow example . 139
Figure 108 – use of UUIDs to handle SED flows . 141
Figure 109 – use of UUIDs to handle SCC flows . 142
Figure 110 – Handling of minRequestSCDFileVersion/Revision example . 143
Figure 111 – Combining SCC and SED workflows . 144
Figure 112 – Example of exchange between main/fork project and other system . 145
Figure 113 – Combined example SCC/SED . 146
Figure 114 – Use of SCC for extension engineering . 147
Figure 115 – Single line of project process example . 148
Figure 116 – Project execution flow . 148
Figure 117 – interaction between main and for projects . 149
Figure 118 – Use of SCC for exchange between main and fork project . 149
Figure 119 – example of project flow between engineering and commissioning . 150

Figure 120 – Example of SCC process . 150
Figure 121 – Response of a process ICD to a system specification or IED specification
template . 151
Figure 122 – Response of a process IID to a project SCD . 151
Figure 123 – Response of a process IID to an ISD/SSD . 152
Figure 124 – Response of a process ICD to an SSD with allocation roles . 152
Figure 125 – Global overview. 153
Figure 126 – Reference to FSD. 154
Figure 127 – Reference to ASD . 155
Figure 128 – Use of references . 155
Figure 129 – UUID example 1 . 159
Figure 130 – UUID example 2 . 159
Figure 131 – UUID example 3 . 160
Figure 132 – Scenario 1 . 160
Figure 133 – Zoom on ASD . 161
Figure 134 – Subscenario 1 . 162
Figure 135 – Zoom on SSD Template . 163
Figure 136 – Subscenario 2 . 163
Figure 137 – Zoom on ISD . 164
Figure 138 – Subscenario 3 . 164
Figure 139 – Zoom on SCD. 165
Figure 140 – Subscenario 4 . 165
Figure 141 – Scenario 2 . 166
Figure 142 – Scenario 3 . 166

Table 1 – Reference between published versions of the standard and related
namespace name. 15
Table 2 – Attributes of the IEC 61850-6-100:2019B9 XML namespace . 15
Table 3 – Attributes of the IEC 61850-6-100:2019C1 XML namespace.
...