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This section contains the relevant documents for designing 11kV to Low Voltage Distribution Substations
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Report damage
If you see damage to our electricity network or anything that doesn’t seem right, keep well away and let us know.
Track live power cuts
Find and track power cuts or planned outages near you on our live Power Track map.
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What to expect
We sometimes need to switch off your power to carry out essential maintenance or upgrade our network. Use our resources to help plan ahead.
Track a planned power cut
Track your planned power cut online to get the latest updates and stay informed. Follow progress and see when your power is expected to be restored.
Register for extra support
If you or someone you care for needs additional support, our free Priority Services may be able to help. Find out if you're eligible and register today.
Do you have an upcoming planned power cut?
Had a letter or notification about a planned power cut? If you’d like to talk it through, send us a message on WhatsApp and our team will be happy to help.
Do you need to report damage to our overhead network?
If you notice damage to our network, stay well away and call us on 105 immediately.
Check for underground cables before you dig
Planning building, fencing or landscaping work? Check where our underground cables are before you start, so you can plan your work and dig safely.
Stay safe around underground cables
Find safety advice for working near underground cables, including what to consider before you start and how to avoid potential hazards.
Do you need to report damage to our underground cables?
If you spot damage to our cables, stay well away and call us on 105 immediately.
Substation clearance
If a substation has rubbish, fly-tipping or overgrown vegetation, we can come out and clear it.
Substation access
If you or a third party requires access to our substation, we will arrange for our engineer to give you access.
Substation repair
If you have noticed our substation is damaged we will attend and carry out the repairs needed.
Do you need to report damage to our substation or equipment?
If you notice damage to our substation or equipment, stay well away and call us on 105 immediately.
Application for design submission for telecoms network providers
If you have a framework agreement in place you can request joint use of any of our low voltage (LV) poles.
Keeping safe
Find advice to help you, your family and pets stay safe around our electricity network and potential hazards.
Equipment on your land
Find out about electrical equipment on your land, what it means for you and when you may need our help.
Helpful resources
Find helpful safety resources and guidance for working or playing safely around our electricity network and equipment.
Do you need to report damage to our electricity network?
If you’ve damaged an underground cable or overhead line, or spot something that isn't quite right, please keep yourself and others well away from this and call 105 immediately so we can help.
Need an instant estimate for connecting 1–4 homes or a business?
Apply online using our self-serve tool to get an instant estimate and choose to move forward with a formal quote.
Move
Planning an extension or renovation, or need to move your meter, cables or overhead wires? We've got you covered.
Modify
Need to check your power supply or upgrade it for new technology at your property? We can help.
Disconnect
Do you need us to temporarily or permanently turn off your power so you can safely complete your work or project?
Need an instant estimate for moving your meter?
Apply online using our self-serve tool to get an instant estimate and choose to move forward with a formal quote.
Electric Vehicles (EV)
Whether you're adding a charger at your home or work, or developing large EV charging setups, we're here to support your connection needs.
Solar & Generation
If you're installing solar, battery storage or other generation systems like wind, we can guide you through connecting to our network.
Heat Pumps
Considering a heat pump for your home or business? We’ll help you understand what’s involved, what’s required and how to connect it to our network.
Considering a heat pump for your home or business? We’ll help you understand the process and what’s required.
Because the work must be carried out by a qualified installer, your first step is to choose one. They’ll manage the process for you and will get in touch with us if your installation needs to be registered or if your electricity supply requires an upgrade
View our DSO Action Plan
Find out where are are in making the electricity system smarter, fairer, more flexible and decarbonised on our year of delivery.
View all our resources
Can't find what you're looking for? Browse our full library of tools and maps to support your connections journey.
ED3 Business Plan
Discover our plans to strengthen the network, support communities, and enable a cleaner energy future.
Connections Useful Documents
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Become a Stakeholder
Join our stakeholder community to share your views, provide feedback, and help shape the services and decisions that affect our customers and communities.
Access our latest and upcoming business plans
Can’t find what you’re looking for? Browse our full library of tools and maps to support your connections journey.
Reimbursements
If you’ve had a power cut and we’ve offered you welfare support, you can use our form to request your reimbursement. Once submitted, we’ll review your claim and process it as soon as possible.
Before you get in touch...
Discover the services available to you, apply online, and easily track, manage, and update your application as your project progresses.
Contact our Customer Relations Team
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Give us feedback
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Email our media team
Send our media team an enquiry and we’ll get back to you as soon as possible.
Latest News
Read the latest news, announcements and updates from SSEN Distribution.
SSE Energy Services
If you’re looking for SSE Energy Services, which has been part of OVO Energy since January 2020, you can find help with your energy account, bills and supply on their website.
PR-NET-ENG-032 - Fuse and Earth Fault Loop Impedance Requirements for Secondary Plant, Networks and Low Voltage Cut-outs – Design Standard
TEM-NET-CAB-007 - 11 kV and 6.6 kV Fault Level and Earthing Data Calculator
TG-NET-CAB-001 - Electricity Service, Intake and Distributor Cables up to and Including 33kV - Design and Installation Standard
TG-NET-CAB-009 - Load Ratings of LV to 33 kV Underground Cables - Design Data
TG-NET-CAB-010 - Electrical Constants for LV to 33kV Underground Cables - Data Sheet
TG-NET-CAB-410 - The Distribution Cable and Associated Equipment Catalogue
TG-NET-CAB-412 - The LV Auxiliary Cables Catalogue
TG-NET-CAB-026 - Connections of Earthing and Bonding Conductors – Installation Instruction
TG-NET-CAB-029 - Earthing Data for SHEPD Licence Area Network - Data Sheet
TG-NET-CAB-030 - Earthing Data for SEPD Licence Area Network - Data Sheet
TG-NET-OHL-038 - Earthing Conductors, Rods, Couplings and Connectors for Lines up to and Including 33kV, Distribution Substations and Cable Jointing - Data Sheet
TG-NET-SST-004 - Bonding and Earthing - Design Standard
WI-NET-CAB-150 - Earthing of Secondary Substation Ground Mounted Plant – Installation Instruction
TG-NET-CAB-410 – The Distribution Cable and Associated Equipment Catalogue
TG-NET-CAB-411 - Joints and Accessories Catalogue for Cable Systems up to and including 33kV
TG-NET-CAB-425 - Cable Termination Guide for Distribution Plant up to and including 33kV
TG-NET-CAB-426 - 11kV and 33kV Joints Selection Matrix
WI-NET-CAB-125 - Torque Settings for Fasteners of HV Cable Box Lugs – Installation Instruction
FO-NET-ENG-015 - Product Assessment Form
FO-NET-ENG-020 - Request for Deviation(s) from ‘G81’ Standards and Operational Documents
FO-NET-ENG-023 - Comments Form for SSEN Documents
PR-NET-ENG-001 - Technical Assessment of Products for Use, or Adoption, by SSEN on the Distribution Network
PR-NET-ENG-039 - Deviations from ‘G81’ Standards and Operational Documents - Design Standard
PR-NET-ENG-043 - Documents for use by Third Parties - Commenting on and Publishing of SSEN Public Documents
REF-NET-ENG-001 - Common Acronyms and Terms Used in Networks Documents – Reference Document
Request For Additional Information
TG-NET-ENG-011 replaced by PR-NET-ENG-039
TG-NET-PAC-037 - Operational Technology Equipment Catalogue (Contestable)
TG-NET-SST-015 - Substations Materials Catalogue - Data Sheet
PR-NET-ENG-053 - Insulation Co-ordination Within SSEN Distribution – Design Standard
PR-NET-NPL-001 - Planning Standards for Low Voltage Distribution Network
REF-NET-COM-001 - POC Self-Determination and Self-Design Approval
TEM-NET-ENG-006 - Design Review and Approval Checklist for Secondary Distribution Substations and Cable Systems
TEM-NET-SST-001 - Overhead Line and Substation Risk Assessment Calculator
TG-NET-CAB-004 - Industrial and Commercial Loads Between 300kW and 4MW
TG-NET-ENG-005 - SSEN Standard Design Matrix for POC Assessment
TG-NET-NPL-010 - Planning Standards for 11 kV and 6.6 kV Distribution Networks
TG-NET-NPL-012 - Distribution Planning Standards of Voltage and Security of Supply
TG-NET-NPL-014 - Flickers and Harmonics at Low Voltage
TG-NET-SST-013 - Locations with High Earth Potential Rise (Hot Sites) - Design Standard
WI-NET-CAB-128 - Overhead Line and Substation Risk Calculator – User Guide
FO-NET-ENG-024 - Data Collection Form - Low Voltage Circuit Breaker
FO-NET-ENG-027 - Data Collection Form - Decommissioned Plant
FO-NET-ENG-028 - Data Collection Form - High Voltage Metalclad Fuse Switch
FO-NET-ENG-029 - Data Collection Form - Ground Mounted HV Circuit Breaker
FO-NET-ENG-033 - Data Collection Form - Site Decommissioning
FO-NET-ENG-034 - Data Collection Form - High Voltage Metalclad Fuse Switch
FO-NET-ENG-045 - Data Collection Form - Free Standing Earth Switch
FO-NET-ENG-046 - Data Collection Form - Ring Main Unit
FO-NET-ENG-047 - Data Collection Form - Voltage and Current Transformers
FO-NET-ENG-052 - Data Collection Form - LV Cabinets, Pillars, and Wallboards
FO-NET-ENG-053 - Data Collection Form - Ground Mounted Transformer
FO-NET-SST-011 - Design & Equipment Approval Status Log
FO-NET-ENG-063
PR-NET-ENG-046 - Asset Data Updating Procedure
TEM-NET-ENG-010 - Project Handover Checklist For Distribution Projects
TG-NET-ENG-015 - Asset Data Collections Forms–Completion of Forms
TG-NET-ENG-045 - Design Review Process for ICP and IDNO Design Submissions
FO-NET-SST-011 - Design & Equipment Approval Status Log
PR-NET-ENG-048 - Standardised IDNO - ICP Asset Designs
PR-NET-SST-012 - LVAC Auxiliary Supplies for 6.6kV to 132 kV Substations – Design Standard
TEM-NET-CAB-007 - 11 kV and 6.6 kV Fault Level and Earthing Data Calculator
TG-NET-ENG-012 - Signs and Labels used in SSEN ‘G81’ Documents - Catalogue
TG-NET-SST-009 - Siting of New Ground Mounted Secondary Distribution Substations in Flood Zones
TG-NET-SST-010 - Risk Assessment Codes Applicable to New Substations With No Exposed Live
TG-NET-SST-201 - Secondary Substation Plant Catalogue
TG-NET-SST-026 - Ratings of Oil-Filled Power Transformers
WI-NET-CAB-132 - 11 kV and 6.6 kV Fault Level and Earthing Data Calculator – User Guide
WI-NET-OPS-034 - Nomenclature and labelling of Networks Electrical Equipment
FO-NET-SST-001 - BSC Metering Equipment Commissioning Record Part 1 (Measurement Transformers)
FO-NET-SST-006 - Notification of Witnessing of Installation or Testing
PR-NET-SST-001 - BSC Metering Equipment Commissioning Requirements (Rev2.01) DBA Library-Version
TG-NET-SST-011 - Secondary Distribution Network Assets; Tests and Records - Commissioning Standards