Business Details
Expert Electrical Testing & Commissioning Services
Pannell & Partners is a specialist electrical engineering consultancy with extensive expertise in power systems testing, condition assessment, and commissioning. Our services focus on frequency response testing, partial discharge analysis, tan delta testing, and compliance with grid connection standards such as G99 and G5/5. With decades of collective experience, our team delivers reliable solutions for high-voltage (HV) assets across defense, renewable energy, industrial, and commercial sectors. We provide tailored support for marine-based and land-based systems, including dynamic containment testing, power quality analysis, and HV cable diagnostics.Our engineers are recognized as Independent Technical Experts (ITE) by National Grid, ensuring adherence to rigorous technical and regulatory standards. Client testimonials highlight our professionalism, technical proficiency, and ability to meet critical project deadlines. We combine advanced testing methodologies with bespoke consultancy to enhance system safety, optimize performance, and extend asset lifespans.
Services
Frequency Response Testing
G99 Compliance Testing
Partial Discharge Analysis
Tan Delta Testing
Power Quality Monitoring
HV Cable Diagnostics
Pre-Commissioning Services
Marine HV Assessments
Grid Connection Support
Relay Testing
Highlights and features
- Recognized Independent Technical Experts by National Grid
- Over 35 years of combined experience in HV condition assessment
- Specialized in dynamic frequency response and grid compliance testing
- Proven track record with defense and renewable energy sectors
- Bespoke solutions for marine and land-based HV systems
What people say
Unfaltering professionalism
On-going professional support
Expert, efficient consultancy
Pragmatic system configuration alterations
Successful grid connection deadlines
Services
Frequency Response Testing
Specialist testing to ensure grid-connected systems meet National Grid requirements. We conduct dynamic containment, regulation, and moderation tests using precision equipment. Our engineers validate frequency response performance for battery storage, renewables, and industrial systems, ensuring compliance with DS3 and EIRGRID standards.
G99 Testing
Comprehensive G99 compliance testing for embedded generation systems. We perform loss-of-mains protection validation, relay testing, and pre-commissioning assessments. Our services cover solar PV, wind, CHP, and hydro projects, ensuring adherence to ENA G99 requirements and DNO approval processes.
Partial Discharge Analysis
Advanced partial discharge (PD) testing for HV cables, generators, and motors. We use portable equipment to detect insulation defects in marine and land-based systems. Our analysis identifies early-stage faults, enabling predictive maintenance and extending asset lifespan for defense and industrial clients.
Power Quality Analysis
Detailed harmonic and transient analysis using high-speed data loggers. We assess G5/4 and G5/5 compliance, measure voltage dips, and optimize power factor. Our solutions reduce DNO penalties, improve system reliability, and support embedded generation integration for commercial and industrial clients.
Marine HV Assessments
Tailored HV testing for marine platforms, including Royal Navy vessels and cruise ships. We conduct tan delta testing, cable diagnostics, and condition assessments in space-constrained environments. Our services ensure safety and compliance for critical maritime electrical systems.
People
Ross Pannell
Director
With over 35 years in electrical engineering, Ross leads Pannell & Partners' consultancy services. He specializes in grid compliance, frequency response testing, and HV diagnostics, supporting defense and renewable energy projects. His expertise ensures client systems meet rigorous technical standards.
Questions
What grid compliance services do you offer?
We provide G99 testing, dynamic frequency response validation, and pre-commissioning services for embedded generation systems connected to National Grid.
Do you work with marine electrical systems?
Yes, we specialize in HV condition assessment for naval and cruise ship platforms, including partial discharge and tan delta testing.
How do you ensure testing accuracy?
We use calibrated equipment and follow IEC 60270 standards, with results verified by DNO engineers during witness tests.
What industries do you serve?
We support defense, renewable energy, industrial, and commercial sectors with power systems testing and commissioning services.
Can you help with power quality issues?
Yes, we conduct G5/4 and G5/5 harmonic analysis to identify and resolve power quality problems affecting equipment performance.
