Electrical standards documents

Here you will find the electrical standards documents including specifications for electronic data communications facilities that apply to transmission-connected generators in England, Wales, and Scotland. 

 Please use the table below to see which standards apply to your connection.

  RES SPT SHE Transmission EDL/EDT Control Telephony
Directly connected in England & Wales ✔     ✔ ✔
Directly connected in SPT’s area   ✔   ✔ ✔
Directly connected in SHE Transmission’s area     ✔ ✔ ✔
Embedded BM Participant       ✔ ✔

RES = Relevant Electrical Standards 
SPT = Scottish Power Transmission 
SHE = Scottish Hydro Electric Transmission    
EDL = Electronic Dispatch Logging 
EDT = Electronic Data Transfer

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Raising a change and further help

The process for raising changes to the electrical standards is in paragraph 11 of the general conditions of the Grid Code. If you are interested in raising a change to the electrical standards, please contact the Grid Code Review Panel Secretary in the first instance at [email protected] 

You can find further details in the RES Guidance Document.

If you need access to the GB Transmission System National Grid Technical Specifications, please contact the team at [email protected].

England and Wales electrical standards

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Please note that the titles and any references within these standards may use or omit leading zeroes interchangeably for ease of sorting. So for example, TS2.01 and TS2.1 refer to the same document.

Name Published
Circuit Breakers - TS 3.02.01 RES i2 16 Jul 2018
System Monitor – Dynamic System Monitoring (DSM) - TS 3.24.70 RES i2 16 Jul 2018
Ancillary Services Business Monitoring - TS 3.24.95 RES i2 16 Jul 2018
Synchronising - TS 3.24.60 RES i2 16 Jul 2018
System Monitoring – Fault Recording - TS 3.24.71 RES i1 16 Jul 2018
Operational Date Transmission - TS 3.24.100 RES i1 16 Jul 2018
Ratings and General Requirements for Plant, Equipment and Apparatus directly connected to the National Grid System - TS 1 (RES) 30 May 2018
LImits for Temporary Overvoltages in England and Wales Network TGN(E) 288 16 Apr 2018
Substation Auxiliary Supplies - TS 2.12 (RES) 22 Jan 2015
Current Transformers for Protection and General Use - TS 3.02.04 (RES) 22 Jan 2015

RES guidance document

Specifications for electronic data communications facilities

Electrical standards for SPTs transmission system