LV Historic Faults

Information

The "LV Historic Faults" dataset provides all unplanned occurrences / interruptions of 3 minutes or longer on the SPEN network from 1st April 2014. 

Any occurrence on the SPEN network which: 

a) affects the distribution system or other connected electricity supply system, which involves a physical break in the circuit upstream of the customers interrupted (or circuit affected), for three minutes or longer, due to automatic or manual operation of switchgear or fusegear, or due to any other open circuit condition, which:

  1.  results in an interruption of supply to customer(s) for three minutes or longer; or
  2. prevents a circuit or item of equipment from carrying normal load current or being able to withstand “through fault-current” for three minutes or longer.

b) causes the un-programmed isolation of any circuit or item of equipment, energised at power system voltage, which has not been classified as a pre-arranged incident;

c) causes failures of non-system equipment (e.g. pilot cables, oil and gas alarms, voltage control equipment etc.) which result in the disconnection of equipment energised at power system voltage; incorrect operations of protection equipment which result in the interruption of a circuit energised at power system voltage;

d) causes failures by protection equipment to operate. This includes incidents where the main protection fails to operate and a fault clearance is initiated by back-up protection or protection at another point on the network;

e) causes any interruption to supply to customers caused by incidents on other connected systems owned by the National Grid/Transmission Companies (in Scotland), other distribution businesses, embedded generators, that arises from loss of supply to these systems.

Disclaimer: Data for previous reporting years has been submitted and will not change.  Data within the current reporting year is subject to change.

If you wish to provide feedback at a dataset or row level, please click on the “Feedback” tab above.

Data Triage

As part of our commitment to enhancing the transparency, and accessibility of the data we share, we publish the results of our Data Triage process.

Our Data Triage documentation includes our Risk Assessments; detailing any controls we have implemented to prevent exposure of sensitive information.  Click here to access the Data Triage documentation for the Historic Faults dataset. 

To access our full suite of Data Triage documentation, visit the SP Energy Networks Data & Information.


Download dataset metadata (JSON)

Dataset Identifier
all-lv-faults-spd-spm
Downloads
43
Themes
Network Usage
Keywords
Outages, Faults, Historic, Unplanned, Low Voltage
Language
English
Modified
25 March 2025 11:50
Publisher
SP Energy Networks SC389555
Coverage
Central Belt and South of Scotland; North Wales, Merseyside, Cheshire and North Shropshire
Creator
SP Energy Networks SC389555
Subject
Outages, Faults, Historic, Unplanned, Low Voltage
Contributor
N/A
Type
Dataset
Format
CSV, JSON, XLSX
Source
SP Energy Networks SC389555
Relation

N/A

Rights

Creative Commons Attribution 4.0 International

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Last processing
15 April 2025 12:27 (metadata)
25 March 2025 11:50 (data)

Attachments

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Dataset schema

Click to expand Click to collapse
Master Job Ref
The SPEN master reference number of occurrence / incident.

No description available for this field.

Name (identifier) 
master_job_ref
Type 
text
Sample 
                       		                   
               
       
   
       
Job Ref
       
           
               
The SPEN Ofgem QoS reference number of occurrence / incident. 
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
job_ref
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Split Incident
       
           
               
N - This is the SPEN master occurrence / incident reference for reporting purposes.
Y - This is when SPEN had to make re-interruptions to supply from the network, outwith the re-interruption period, of the master occurrence / incident to restore the network to pre fault availability.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
split_incident
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Reporting Year
       
           
               
The Regulatory reporting Year, 1st April - 31st March, year used is from the 1st April of that reporting year. 
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
reporting_year
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Date/Time of Incidents
       
           
               
The date and time of occurrence / incident is the earlier of:-
a)	The time at which customers lose normal supply;
or
b)	The time at which the circuit is automatically or deliberately disconnected.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
date_time_of_incidents
                       		                   
                   
                                                  Type                                                                         
datetime
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
IIP Reporting Scheme Code
       
           
               
For the purpose of the Scheme, 
An EHV system is one which operates at a nominal voltage equal to or greater than 22 kV, but less than 132 kV
an HV system is one which operates at a nominal voltage in excess of 1000 V but less than 22 kV.
An LV system is one which operates at a nominal voltage of 1000 V or less.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
iip_reporting_scheme_code
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Licence
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
licence
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
District
       
           
               
The SPEN District of occurrence / incident.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
district
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Circuit Code
       
           
               
The HV Circuit code that was affected by the occurrence / incident.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
circuit_code
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Circuit Code Description
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
circuit_code_description
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV Transformers ID
       
           
               
The LV Transformer number that was affected by the occurrence.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_transformers_id
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV Feeder
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_feeder
                       		                   
                   
                                                  Type                                                                         
decimal
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV Substation Name
       
           
               
The LV Transformer name that was affected by the occurrence. 
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_substation_name
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Main Cause
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
main_cause
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
RRP Category
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
rrp_category
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV MEI
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_mei
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV MEI Prefix
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_mei_prefix
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
LV Component
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
lv_component
                       		                   
                   
                                                  Type                                                                         
text
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
Customers Interrupted
       
           
               
The total number of unique customers affected by the occurrence / incident.
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
customers_interrupted
                       		                   
                   
                                                  Type                                                                         
decimal
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
CHL
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
chl
                       		                   
                   
                                                  Type                                                                         
decimal
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   
       
CI/CML Penalty
       
           
               
               
No description available for this field.
           
               
                   
                                                  Name (identifier)                                                                         
ci_cml_penalty
                       		                   
                   
                                                  Type                                                                         
decimal
                       		                   
                                      
                                                  Sample                                                                         
                       		                   
               
       
   

                                
JSON Schema

                                

                                    The following JSON object is a standardized description of your dataset's schema.
                                    More about JSON schema.
                                

                                
   
{
  • "title":"all-lv-faults-spd-spm",
  • "type":"object",
  • "oneOf":
    [
    • {
      • "$ref":"#/definitions/all-lv-faults-spd-spm"
      }
    ]
    ,
  • "definitions":
    {
    • "all-lv-faults-spd-spm":
      {
      • "properties":
        {
        • "records":
          {
          • "type":"array",
          • "items":
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            • "$ref":"#/definitions/all-lv-faults-spd-spm_records"
            }
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      }
      ,
    • "all-lv-faults-spd-spm_records":
      {
      • "properties":
        {
        • "fields":
          {
          • "type":"object",
          • "properties":
            {
            • "master_job_ref":
              {
              • "type":"string",
              • "title":"Master Job Ref",
              • "description":"The SPEN master reference number of occurrence / incident."
              }
              ,
            • "job_ref":
              {
              • "type":"string",
              • "title":"Job Ref",
              • "description":"The SPEN Ofgem QoS reference number of occurrence / incident. "
              }
              ,
            • "split_incident":
              {
              • "type":"string",
              • "title":"Split Incident",
              • "description":"N - This is the SPEN master occurrence / incident reference for reporting purposes.
Y - This is when SPEN had to make re-interruptions to supply from the network, outwith the re-interruption period, of the master occurrence / incident to restore the network to pre fault availability."
              }
              ,
            • "reporting_year":
              {
              • "type":"string",
              • "title":"Reporting Year",
              • "description":"The Regulatory reporting Year, 1st April - 31st March, year used is from the 1st April of that reporting year. "
              }
              ,
            • "date_time_of_incidents":
              {
              • "type":"string",
              • "format":"date-time",
              • "title":"Date/Time of Incidents",
              • "description":"The date and time of occurrence / incident is the earlier of:-
a)	The time at which customers lose normal supply;
or
b)	The time at which the circuit is automatically or deliberately disconnected."
              }
              ,
            • "iip_reporting_scheme_code":
              {
              • "type":"string",
              • "title":"IIP Reporting Scheme Code",
              • "description":"For the purpose of the Scheme, 
An EHV system is one which operates at a nominal voltage equal to or greater than 22 kV, but less than 132 kV
an HV system is one which operates at a nominal voltage in excess of 1000 V but less than 22 kV.
An LV system is one which operates at a nominal voltage of 1000 V or less."
              }
              ,
            • "licence":
              {
              • "type":"string",
              • "title":"Licence",
              • "description":""
              }
              ,
            • "district":
              {
              • "type":"string",
              • "title":"District",
              • "description":"The SPEN District of occurrence / incident."
              }
              ,
            • "circuit_code":
              {
              • "type":"string",
              • "title":"Circuit Code",
              • "description":"The HV Circuit code that was affected by the occurrence / incident."
              }
              ,
            • "circuit_code_description":
              {
              • "type":"string",
              • "title":"Circuit Code Description",
              • "description":""
              }
              ,
            • "lv_transformers_id":
              {
              • "type":"string",
              • "title":"LV Transformers ID",
              • "description":"The LV Transformer number that was affected by the occurrence."
              }
              ,
            • "lv_feeder":
              {
              • "type":"number",
              • "title":"LV Feeder",
              • "description":""
              }
              ,
            • "lv_substation_name":
              {
              • "type":"string",
              • "title":"LV Substation Name",
              • "description":"The LV Transformer name that was affected by the occurrence. "
              }
              ,
            • "main_cause":
              {
              • "type":"string",
              • "title":"Main Cause",
              • "description":""
              }
              ,
            • "rrp_category":
              {
              • "type":"string",
              • "title":"RRP Category",
              • "description":""
              }
              ,
            • "lv_mei":
              {
              • "type":"string",
              • "title":"LV MEI",
              • "description":""
              }
              ,
            • "lv_mei_prefix":
              {
              • "type":"string",
              • "title":"LV MEI Prefix",
              • "description":""
              }
              ,
            • "lv_component":
              {
              • "type":"string",
              • "title":"LV Component",
              • "description":""
              }
              ,
            • "customers_interrupted":
              {
              • "type":"number",
              • "title":"Customers Interrupted",
              • "description":"The total number of unique customers affected by the occurrence / incident."
              }
              ,
            • "chl":
              {
              • "type":"number",
              • "title":"CHL",
              • "description":""
              }
              ,
            • "ci_cml_penalty":
              {
              • "type":"number",
              • "title":"CI/CML Penalty",
              • "description":""
              }
            }
          }
        }
      }
    }
}


                            

                        



                        
                            

    

        
    

            

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