Substation Inspections
Routine & Detailed Substation Inspections for Safe, Reliable Operation
We carry out comprehensive substation inspections for high and low voltage systems across the UK. Our inspections help reduce risk, ensure compliance, and maintain the safe and efficient operation of electrical infrastructure.
Why Substation Inspections Matter
Substations are critical assets in any electrical network. Regular inspections identify faults, damage and signs of wear before they lead to failure. We work with facility managers, industrial clients and infrastructure operators to deliver clear, actionable reports and long-term asset protection.
What We Inspect
Northwick follow industry standards including SFG20 and your site’s safety rules to complete each inspection safely and thoroughly.
Substation inspection covers:
- Switchgear condition and operation
- Transformer checks and oil levels
- Cabling, joints and terminations
- Earth system integrity
- Protection relays and control panels
- Physical security and access points
- Environmental factors such as water ingress or vermin
- Signage, lighting and safety systems
Types of Inspections Available
We offer several levels of inspection to suit your needs, from routine visual checks to detailed condition assessments.
Services include:
- Routine substation inspections
- Annual maintenance inspections
- Thermal imaging surveys
- Pre-handover inspections
- Asset condition reporting for insurance or compliance
- Substation Ground Maintenance
All inspections come with a clear report, including photos, observations and recommended actions.
Sectors We Support
- Commercial and industrial buildings
- Data centres and healthcare
- Rail, infrastructure and utilities
- Private networks and independent electrical systems
- MOD
Frequently Asked Questions
How often should substations be inspected?
Substations should be visually inspected every 6 to 12 months, with a more detailed inspection carried out annually or as specified by your asset management plan.
Do you inspect both HV and LV substations?
Yes. We inspect both high voltage and low voltage substations, including private networks.
Can you provide inspection reports for compliance?
Absolutely. All inspections come with detailed reports suitable for internal records, regulatory audits and insurance reviews.
What happens if you find a fault during inspection?
If we discover any issues during the inspection, we will highlight them in the report and can provide a quote for remedial works or emergency response if needed.