Cable and Protection Studies for UK Power and Industrial Sites
Full cable system design to IEC and CIGRE. Protection coordination and relay settings for grid connections and industrial sites. Independent design assurance issued as a located findings register. Chartered Engineer led. One calculation or the whole package.
What We Do
Cable system design is where we are quickest and most specialised. G99 connections, protection studies, power system studies and design assurance run alongside it, and every one of them can be bought on its own.
Cable System Design
Sizing to IEC 60287, cyclic and emergency ratings, short circuit and screen sizing, bonding, pulling, forces, EMF, route drawings and design review.
- • Single calculations, no minimum
- • Expedited turnaround available
- • Review, drawings and site testing
G99 Connections
Complete Type C and Type D packages for projects 10MW to 100MW+ connecting at 11kV to 132kV and above.
- • All G99 required studies
- • SAF & PGMD submission
- • Protection coordination
Protection Studies
Protection coordination, grading and relay settings for grid connections and industrial sites, issued as settings tables the DNO and the commissioning engineer can hold you to.
- • Protection grading
- • Relay settings tables
- • Short circuit analysis
Power System Studies
Individual power system studies available when you need specific analysis rather than a complete package.
- • Short circuit & fault level
- • Protection coordination
- • P28 & G5/5 compliance
Design Assurance
Independent review of a design package before it goes to the owner's engineer, issued as a located findings register you can answer point by point.
- • Independent, not the designer
- • Located to drawing and clause
- • Findings classified by severity
Technical Capabilities
Cable system work to the IEC and CIGRE standards, plus the power system studies a UK connection needs. Every input stated, every clause named.
Chartered Engineer Leadership
Led by a Chartered Engineer with deep expertise in UK grid codes. Every project benefits from professional oversight and rigorous technical standards.
UK Grid Specialists
We work exclusively on UK grid connections. This focus means we understand DNO preferences, stay current with code changes, and know what's needed for approval.
One Engineer, Start to Finish
The same engineer takes a circuit from the rating calculation through the route design to the settings schedule, so nothing is lost between studies.
Our Own Calculation Engine
The cable rating calculations run on software we wrote and maintain rather than bought in, which is what makes expedited turnaround possible when a programme demands it. Add GB Grid Data for connection site search.
Featured Projects
Cable system design, grid connection and power systems engineering delivered by Star Delta Power.
Halesworth BESS
Independent 132 kV Cable Ampacity Verification
33kV Cable Study
Tools
Ten free calculators, written and maintained in house rather than bought in. Four are protection tools, two are cable, and the rest cover general power systems.
Cable Volt Drop
Volt drop against route length, with the limits plotted and the maximum compliant length.
Open tool →Induced Sheath Voltage
Screen standing voltage against the 65 V limit, and the longest bonded section.
Open tool →IDMT Protection Curves
Trip times for the IEC curves, with the characteristic plotted against the settings.
Open tool →IDMT Test Comparison
Injected test results against the expected curve, per phase, with the deviation.
Open tool →Fault Waveform
Asymmetric fault current with the d.c. offset, against X/R and point on wave.
Open tool →Three-Phase Vectors
Phasor diagram for a three-phase system, with the neutral displacement.
Open tool →Power Calculator
Active, reactive and apparent power, and the power factor between them.
Open tool →Transformer Losses
Load and no-load losses across the loading range, and the efficiency curve.
Open tool →Transformer X/R
Convert between impedance, X/R ratio and the resistance and reactance components.
Open tool →Also available
Design resourcing
Design managers, project coordinators and project engineers placed with your team, backed by a Chartered Engineer who can run the calculation behind the comment.
Start Your Project
Tell us what you need looked at and we'll come back with a scope and a fee. A single calculation is a job, so ask for exactly what you want.
Prefer to reach out directly?
enquiries@stardeltapower.co.uk
Star Delta Power Ltd · Registered in England No. 11200303 · £5M PI Insurance