Substation & SLD Design
Transformer sizing, switchgear selection and graded protection settings so faults clear locally — not by tripping the whole plant.
Discipline 03 · Electrical
Electrical Engineering.
Safe, high-uptime and future-ready power — from the 33 kV substation to the final outlet. Substations, single-line diagrams, earthing, photometrics and thermography, designed as one coordinated system.
Scroll
Substation & distribution study
StudiesLoad flow · Fault level
PhotometricsDIALux modelling
AuditIR thermography
PV & grid interface
01 Scope
Scope of work
What we deliver
Complete electrical design from HT/LT substations to coordinated single-line diagrams, earthing and lightning protection, plus DIALux photometric studies and infrared thermography audits that catch hidden hotspots before they cause fires or unplanned shutdowns.
- HT/LT substation design: 33/11 kV substations, transformer sizing, HT switchgear and LT panels
- Power distribution & SLDs: coordinated single-line diagrams, cable sizing, voltage-drop calculations
- Earthing & lightning protection: grounding grids and LPS engineering per BNBC 2020 / NFPA 780
- DIALux photometric studies: task-tailored industrial and commercial illumination lux modelling
- Infrared thermography audits: thermal imaging to pinpoint overloaded connections and phase imbalance
- Utility liaison: BREB / DPDC / DESCO rule compliance for connections and sanctions
02 DeliverablesIncluded
Every package includes
Clear deliverables, fixed scope, milestone billing.
DIALux Lighting Design
Lux-level modelling for production, warehouse and outdoor areas with energy comparison and luminaire schedules.
Thermography Audit
Non-contact infrared scans that catch hotspots, loose terminations and phase unbalance before failure.
Electrical scopeSend your load list for a first review →
03 ProcessHow we work
How an MTech project runs
From agreed design basis to senior peer vetting and signed submission — the same five-step rhythm on every engagement, so you always know what happens next.
Consultation
We visit the site, understand the process layout, growth plans and constraints — then define the brief with you.
Survey & Analysis
Topographic, geotechnical and structural surveys feed engineering analysis, not guesswork.
Design & Review
Concepts, calculations and drawings reviewed with your team at every milestone. You approve before we proceed.
Approval Support
We prepare and follow submission packages through RSC, Nirapon, BEPZA, RAJUK and utility authorities.
Handover & Aftercare
Construction-stage support, as-built records and a maintenance roadmap keep the asset performing.
04 Design basisStandards
Codes and standards we work to.
Every feeder, breaker and earthing conductor is traced back to a clause you can cite.
BNBC 2020 Pt.8Electrical installations in buildings
NFPA 70 / 70ENEC practice & arc-flash safety
IEC 60364Low-voltage installations
IEC 61439Assemblies & switchgear
IEC 62305Lightning protection
IEEE 141Industrial power distribution
NFPA 780Lightning protection systems
DIALuxPhotometric illumination modelling
BREB / DPDC / DESCOUtility connection rules
BS EN 61439Panel testing & verification
ISO 9001Quality management practice
ASTM / BS ENMaterials & testing
06 Brief
Next step
Talk to the engineer who will own your project.
Tell us the site, the industry and the deadline. We will come back with a scoped proposal — typically within two working days.
- Connected load & supply
- Industry & process
- Timeline & approvals
Next discipline · 04 of 07