Company lists · Data refreshed September 2026
Top 25 Protective relay testing companies based in the United Kingdom
RevenueBase identified 135 company matches for protective relay testing companies associated with the United Kingdom as of September 2026 and tracks 743 professional contacts across them, including 265 with verified work emails. London is the largest hub.
This list covers company matches for protective relay testing companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest protective relay testing companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 83 contacts → | ||||
Exact match “With over 75 years’ experience at the cutting edge of electrical safety testing, our expertise and innovations have produced a number of world firsts.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 2 | 51 contacts → | ||||
Exact match “Monitra (formerly HVPD) are experts in the field of Partial Discharge (PD) testing and monitoring of Medium Voltage and High Voltage electrical equipment, which can be performed…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 3 | 47 contacts → | ||||
Exact match “PASS Limited offers a comprehensive solution for customers including test equipment, training and calibration.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 4 | 42 contacts → | ||||
Exact match “Calbarrie Compliance Services Ltd (Calbarrie) is the UK’s market leader in electrical compliance services and has been trading within the Health & Safety and Compliance sectors…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 5 | 35 contacts → | ||||
Exact match “PBSI Group are a UK manufacturer with a long standing history of providing global customers with innovative protection relays and retrofit medium voltage circuit breaker solutions…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 6 | 32 contacts → | ||||
Exact match “For the last 25 years, Group Management Electrical Surveys have been providing Electrical Inspection, Test and Documentation services to many of the UK's leading companies.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 7 | 32 contacts → | ||||
Exact match “With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 8 | 27 contacts → | ||||
Exact match “Offering a comprehensive solution to meet the demands of Test & Measurement professionals both nationally and internationally, including Test Equipment Sales, Calibration…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 9 | 21 contacts → | ||||
Exact match “At Novus Compliance Services Ltd we specialise in Electrical Testing and Inspection, Maintenance, Installation design, Energy Management and refurbishment for a wide range of…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 10 | 20 contacts → | ||||
Exact match “HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 11 | 14 contacts → | ||||
Exact match “Aylesford Electrical is a specialist testing, maintenance and installation provider based in Kent.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 12 | 14 contacts → | ||||
Exact match “Northern HV are a team of highly skilled professionals with many years of High Voltage and Electrical Commissioning experience.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 13 | 13 contacts → | ||||
Exact match “Tel:+44 (0)1923 442244 Email: sales@instrotech.com Instrotech is a specialist distributor of electrical and environmental test equipment representing all of the major brands.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 14 | 13 contacts → | ||||
Exact match “Choose MS Electrical Solutions LTD for all your electrical install needs and benefit from a dependable service, expert support and quality workmanship, with projects delivered on…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 15 | 10 contacts → | ||||
Exact match “Formed in 2012, Independent Company Safety Services (ICSS) Ltd specialise in Electrical Safety Compliance, and provides Portable Appliance Testing (PAT), Fixed Wire Testing…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 16 | 10 contacts → | ||||
Exact match “Electrical testing, installations, repairs & remedial works.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 17 | 9 contacts → | ||||
Exact match “Fusion Electrical & Building Services Engineering is a leading Electrical Services Company, based in South Wales and working throughout the UK.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 18 | 9 contacts → | ||||
Exact match “Formerly known as South West PAT Test LTD, TECC LTD are an electrical contracting company covering all aspects of commercial, industrial and domestic electrical needs, with a…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 19 | 8 contacts → | ||||
Exact match “Voltamp are leading specialists in electrical testing, portable appliance testing PAT and fire alarm testing based in Kent, UK.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 20 | 6 contacts → | ||||
Exact match “We at Electrical Distribution Solutions deliver tailored solutions to the electrical distribution and control needs of business, large or small.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 21 | 5 contacts → | ||||
Exact match “Welcome to Power Sonic Ltd If you require help and assistance with your electrical safety then you have come to the right place!” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 22 | 5 contacts → | ||||
Exact match “Set up in 2012, we have carried out many installations, mostly commercial & industrial, for a number of high profile clients such as Marks & Spencers, Wembley National Stadium and…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 23 | 4 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 24 | 4 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 25 | 4 contacts → | ||||
Exact match “Frontline Electrical Services Limited is a privately owned company specialising in a full range of electrical engineering, design, install, maintainance, testing and commissioning…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “protective relay testing companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 135 protective relay testing companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 265 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Protective relay testing companies based in the United Kingdom at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 135 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “protective relay testing companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 265 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “protective relay testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many protective relay testing companies are there based in the United Kingdom?
RevenueBase identified 135 company matches for protective relay testing companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Seaward tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most protective relay testing companies?
London leads with 10 company records, followed by Manchester (3) and Bournemouth (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 265 professional contacts with verified work emails tracked across these 135 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
Ready to reach these companies? Verified emails and direct dials for all 135 protective relay testing companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Protective relay testing companies by geography
- Protective relay testing companies based in Australia
- Protective relay testing companies based in Brazil
- Protective relay testing companies based in Canada
- Protective relay testing companies based in Chile
- Protective relay testing companies based in Colombia
- Protective relay testing companies based in Germany
- Protective relay testing companies based in India
- Protective relay testing companies based in Türkiye
- Protective relay testing companies based in the United States
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Protective relay testing companies based in Australia
- Protective relay testing companies based in Brazil
- Protective relay testing companies based in Canada
- Protective relay testing companies based in Chile
- Protective relay testing companies based in Colombia
- Protective relay testing companies based in Germany
Company intelligence · public preview
Top 25 protective relay testing companies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 135 matching company records for protective relay testing companies based in the United Kingdom, with 743 tracked contacts and 265 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 protective relay testing companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Seawardseaward.com HQ: Peterlee, United KingdomReported employees: 51-200 | Peterlee, United Kingdom | 51-200 | Exact match | 83 contacts → |
“With over 75 years’ experience at the cutting edge of electrical safety testing, our expertise and innovations have produced a number of world firsts.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Monitramonitra.co.uk HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 51 contacts → |
“Monitra (formerly HVPD) are experts in the field of Partial Discharge (PD) testing and monitoring of Medium Voltage and High Voltage electrical equipment, which can be performed…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Pass LTDpass.co.uk HQ: Stockton-on-tees, United KingdomReported employees: 51-200 | Stockton-on-tees, United Kingdom | 51-200 | Exact match | 47 contacts → |
“PASS Limited offers a comprehensive solution for customers including test equipment, training and calibration.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Calbarrie Compliance Services LTDcalbarrie.com HQ: Cheltenham, United KingdomReported employees: 51-200 | Cheltenham, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Calbarrie Compliance Services Ltd (Calbarrie) is the UK’s market leader in electrical compliance services and has been trading within the Health & Safety and Compliance sectors…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Pbsi Group LTDpbsigroup.com HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 35 contacts → |
“PBSI Group are a UK manufacturer with a long standing history of providing global customers with innovative protection relays and retrofit medium voltage circuit breaker solutions…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Group Management Electrical Surveys Limitedgroupmanagement.com HQ: Halifax, United KingdomReported employees: 11-50 | Halifax, United Kingdom | 11-50 | Exact match | 32 contacts → |
“For the last 25 years, Group Management Electrical Surveys have been providing Electrical Inspection, Test and Documentation services to many of the UK's leading companies.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Martindale Electric Co. LTDmartindale-electric.co.uk HQ: Watford, United KingdomReported employees: 11-50 | Watford, United Kingdom | 11-50 | Exact match | 32 contacts → |
“With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Micro Precisionalpha-electronics.comHQ: Maidstone, United KingdomReported employees: 51-200 | Maidstone, United Kingdom | 51-200 | Exact match | 27 contacts → |
“Offering a comprehensive solution to meet the demands of Test & Measurement professionals both nationally and internationally, including Test Equipment Sales, Calibration…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Novus Compliance Services Limitednovuscompliance.co.uk HQ: Bishop Stortford, United KingdomReported employees: 51-200 | Bishop Stortford, United Kingdom | 51-200 | Exact match | 21 contacts → |
“At Novus Compliance Services Ltd we specialise in Electrical Testing and Inspection, Maintenance, Installation design, Energy Management and refurbishment for a wide range of…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  HK Engineering LTDhkengineeringltd.co.ukHQ: Melksham, United KingdomReported employees: 11-50 | Melksham, United Kingdom | 11-50 | Exact match | 20 contacts → |
“HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Aylesford Electrical Contractors LTDaylesfordelectrical.co.uk HQ: Maidstone, United KingdomReported employees: 11-50 | Maidstone, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Aylesford Electrical is a specialist testing, maintenance and installation provider based in Kent.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Northernhvnorthernhv.co.uk HQ: Hartlepool, United KingdomReported employees: 1-10 | Hartlepool, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Northern HV are a team of highly skilled professionals with many years of High Voltage and Electrical Commissioning experience.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Instrotech LTDinstrotech.com HQ: Watford, United KingdomReported employees: 11-50 | Watford, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Tel:+44 (0)1923 442244 Email: sales@instrotech.com Instrotech is a specialist distributor of electrical and environmental test equipment representing all of the major brands.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | MS Electrical Solutionsms-electrical.net HQ: Bilton, United KingdomReported employees: 1-10 | Bilton, United Kingdom | 1-10 | Exact match | 13 contacts → |
“Choose MS Electrical Solutions LTD for all your electrical install needs and benefit from a dependable service, expert support and quality workmanship, with projects delivered on…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Icss LTDicssltd.co.uk HQ: Larne, United KingdomReported employees: 11-50 | Larne, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Formed in 2012, Independent Company Safety Services (ICSS) Ltd specialise in Electrical Safety Compliance, and provides Portable Appliance Testing (PAT), Fixed Wire Testing…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Nationwide Compliance Solutions. Call ETM 01922 710014electricaltestmidlands.com HQ: Cannock, United KingdomReported employees: 51-200 | Cannock, United Kingdom | 51-200 | Exact match | 10 contacts → |
“Electrical testing, installations, repairs & remedial works.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Fusion Electrical & Building Services Engineeringfusionelectrics.com HQ: Merthyr Tydfil, United KingdomReported employees: 11-50 | Merthyr Tydfil, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Fusion Electrical & Building Services Engineering is a leading Electrical Services Company, based in South Wales and working throughout the UK.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | HQ: Swindon, United KingdomReported employees: 11-50 | Swindon, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Formerly known as South West PAT Test LTD, TECC LTD are an electrical contracting company covering all aspects of commercial, industrial and domestic electrical needs, with a…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Voltamp LTDvoltamp.co.uk HQ: Beckenham, United KingdomReported employees: 11-50 | Beckenham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“Voltamp are leading specialists in electrical testing, portable appliance testing PAT and fire alarm testing based in Kent, UK.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Electrical Distribution Solutionselectricalds.co.ukHQ: Wolverhampton, United KingdomReported employees: 1-10 | Wolverhampton, United Kingdom | 1-10 | Exact match | 6 contacts → |
“We at Electrical Distribution Solutions deliver tailored solutions to the electrical distribution and control needs of business, large or small.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Power Sonic LTDpowersonic.co HQ: Driffield, United KingdomReported employees: 1-10 | Driffield, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Welcome to Power Sonic Ltd If you require help and assistance with your electrical safety then you have come to the right place!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Turnstone Electrical Servicesturnstone-electrical.co.uk HQ: Greenford, United KingdomReported employees: 1-10 | Greenford, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Set up in 2012, we have carried out many installations, mostly commercial & industrial, for a number of high profile clients such as Marks & Spencers, Wembley National Stadium and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Vector Power Solutions LTDvectorpower.co.uk HQ: Gateshead, United KingdomReported employees: 1-10 | Gateshead, United Kingdom | 1-10 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 |  Tidal Power Services LTDtidalpowerservices.comHQ: Bournemouth, United KingdomReported employees: 11-50 | Bournemouth, United Kingdom | 11-50 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | Frontline Electrical Services Limitedfrontline-electrical.co.uk HQ: St Neots, United KingdomReported employees: 11-50 | St Neots, United Kingdom | 11-50 | Exact match | 4 contacts → |
“Frontline Electrical Services Limited is a privately owned company specialising in a full range of electrical engineering, design, install, maintainance, testing and commissioning…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 135 company matches
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Protective relay testing companies: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
133 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 135 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for protective relay testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many protective relay testing companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 135 matching company records, 743 tracked contacts and 265 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Protective relay testing companies by geography
- Protective relay testing companies based in Australia
- Protective relay testing companies based in Brazil
- Protective relay testing companies based in Canada
- Protective relay testing companies based in Chile
- Protective relay testing companies based in Colombia
- Protective relay testing companies based in Germany
- Protective relay testing companies based in India
- Protective relay testing companies based in Türkiye
- Protective relay testing companies based in the United States
Cite this list
RevenueBase Data Team. Top 25 protective relay testing companies based in the United Kingdom. Snapshot: September 20, 2026. https://revenuebase.ai/companies/protective-relay-testing-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Protective relay testing companies based in Australia
- Protective relay testing companies based in Brazil
- Protective relay testing companies based in Canada
- Protective relay testing companies based in Chile
- Protective relay testing companies based in Colombia
- Protective relay testing companies based in Germany
Company intelligence · public preview
Top 25 protective relay testing companies based in the United Kingdom
RevenueBase records 135 matching company records for protective relay testing companies based in the United Kingdom, with 743 tracked contacts and 265 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 protective relay testing companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Seawardseaward.com HQ: Peterlee, United KingdomReported employees: 51-200 | Peterlee, United Kingdom | 51-200 | Exact match | 83 contacts → |
“With over 75 years’ experience at the cutting edge of electrical safety testing, our expertise and innovations have produced a number of world firsts.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Monitramonitra.co.uk HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 51 contacts → |
“Monitra (formerly HVPD) are experts in the field of Partial Discharge (PD) testing and monitoring of Medium Voltage and High Voltage electrical equipment, which can be performed…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Pass LTDpass.co.uk HQ: Stockton-on-tees, United KingdomReported employees: 51-200 | Stockton-on-tees, United Kingdom | 51-200 | Exact match | 47 contacts → |
“PASS Limited offers a comprehensive solution for customers including test equipment, training and calibration.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Calbarrie Compliance Services LTDcalbarrie.com HQ: Cheltenham, United KingdomReported employees: 51-200 | Cheltenham, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Calbarrie Compliance Services Ltd (Calbarrie) is the UK’s market leader in electrical compliance services and has been trading within the Health & Safety and Compliance sectors…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Pbsi Group LTDpbsigroup.com HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 35 contacts → |
“PBSI Group are a UK manufacturer with a long standing history of providing global customers with innovative protection relays and retrofit medium voltage circuit breaker solutions…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Group Management Electrical Surveys Limitedgroupmanagement.com HQ: Halifax, United KingdomReported employees: 11-50 | Halifax, United Kingdom | 11-50 | Exact match | 32 contacts → |
“For the last 25 years, Group Management Electrical Surveys have been providing Electrical Inspection, Test and Documentation services to many of the UK's leading companies.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Martindale Electric Co. LTDmartindale-electric.co.uk HQ: Watford, United KingdomReported employees: 11-50 | Watford, United Kingdom | 11-50 | Exact match | 32 contacts → |
“With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Micro Precisionalpha-electronics.com HQ: Maidstone, United KingdomReported employees: 51-200 | Maidstone, United Kingdom | 51-200 | Exact match | 27 contacts → |
“Offering a comprehensive solution to meet the demands of Test & Measurement professionals both nationally and internationally, including Test Equipment Sales, Calibration…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Novus Compliance Services Limitednovuscompliance.co.uk HQ: Bishop Stortford, United KingdomReported employees: 51-200 | Bishop Stortford, United Kingdom | 51-200 | Exact match | 21 contacts → |
“At Novus Compliance Services Ltd we specialise in Electrical Testing and Inspection, Maintenance, Installation design, Energy Management and refurbishment for a wide range of…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | HK Engineering LTDhkengineeringltd.co.uk HQ: Melksham, United KingdomReported employees: 11-50 | Melksham, United Kingdom | 11-50 | Exact match | 20 contacts → |
“HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Aylesford Electrical Contractors LTDaylesfordelectrical.co.uk HQ: Maidstone, United KingdomReported employees: 11-50 | Maidstone, United Kingdom | 11-50 | Exact match | 14 contacts → |
“Aylesford Electrical is a specialist testing, maintenance and installation provider based in Kent.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Northernhvnorthernhv.co.uk HQ: Hartlepool, United KingdomReported employees: 1-10 | Hartlepool, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Northern HV are a team of highly skilled professionals with many years of High Voltage and Electrical Commissioning experience.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Instrotech LTDinstrotech.com HQ: Watford, United KingdomReported employees: 11-50 | Watford, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Tel:+44 (0)1923 442244 Email: sales@instrotech.com Instrotech is a specialist distributor of electrical and environmental test equipment representing all of the major brands.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | MS Electrical Solutionsms-electrical.net HQ: Bilton, United KingdomReported employees: 1-10 | Bilton, United Kingdom | 1-10 | Exact match | 13 contacts → |
“Choose MS Electrical Solutions LTD for all your electrical install needs and benefit from a dependable service, expert support and quality workmanship, with projects delivered on…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Icss LTDicssltd.co.uk HQ: Larne, United KingdomReported employees: 11-50 | Larne, United Kingdom | 11-50 | Exact match | 10 contacts → |
“Formed in 2012, Independent Company Safety Services (ICSS) Ltd specialise in Electrical Safety Compliance, and provides Portable Appliance Testing (PAT), Fixed Wire Testing…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Nationwide Compliance Solutions. Call ETM 01922 710014electricaltestmidlands.com HQ: Cannock, United KingdomReported employees: 51-200 | Cannock, United Kingdom | 51-200 | Exact match | 10 contacts → |
“Electrical testing, installations, repairs & remedial works.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Fusion Electrical & Building Services Engineeringfusionelectrics.com HQ: Merthyr Tydfil, United KingdomReported employees: 11-50 | Merthyr Tydfil, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Fusion Electrical & Building Services Engineering is a leading Electrical Services Company, based in South Wales and working throughout the UK.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | HQ: Swindon, United KingdomReported employees: 11-50 | Swindon, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Formerly known as South West PAT Test LTD, TECC LTD are an electrical contracting company covering all aspects of commercial, industrial and domestic electrical needs, with a…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Voltamp LTDvoltamp.co.uk HQ: Beckenham, United KingdomReported employees: 11-50 | Beckenham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“Voltamp are leading specialists in electrical testing, portable appliance testing PAT and fire alarm testing based in Kent, UK.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Electrical Distribution Solutionselectricalds.co.uk HQ: Wolverhampton, United KingdomReported employees: 1-10 | Wolverhampton, United Kingdom | 1-10 | Exact match | 6 contacts → |
“We at Electrical Distribution Solutions deliver tailored solutions to the electrical distribution and control needs of business, large or small.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Power Sonic LTDpowersonic.co HQ: Driffield, United KingdomReported employees: 1-10 | Driffield, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Welcome to Power Sonic Ltd If you require help and assistance with your electrical safety then you have come to the right place!” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Turnstone Electrical Servicesturnstone-electrical.co.uk HQ: Greenford, United KingdomReported employees: 1-10 | Greenford, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Set up in 2012, we have carried out many installations, mostly commercial & industrial, for a number of high profile clients such as Marks & Spencers, Wembley National Stadium and…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Vector Power Solutions LTDvectorpower.co.uk HQ: Gateshead, United KingdomReported employees: 1-10 | Gateshead, United Kingdom | 1-10 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 | Tidal Power Services LTDtidalpowerservices.com HQ: Bournemouth, United KingdomReported employees: 11-50 | Bournemouth, United Kingdom | 11-50 | Exact match | 4 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | Frontline Electrical Services Limitedfrontline-electrical.co.uk HQ: St Neots, United KingdomReported employees: 11-50 | St Neots, United Kingdom | 11-50 | Exact match | 4 contacts → |
“Frontline Electrical Services Limited is a privately owned company specialising in a full range of electrical engineering, design, install, maintainance, testing and commissioning…” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 135 company matches
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Protective relay testing companies: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
133 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 135 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for protective relay testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many protective relay testing companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 135 matching company records, 743 tracked contacts and 265 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 protective relay testing companies based in the United Kingdom. Snapshot: September 20, 2026. https://revenuebase.ai/companies/protective-relay-testing-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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