Stephenson Brothers Ltd

OUR PROJECTS

Engineering Solutions That Power Critical Infrastructure.

From substation rehabilitation to high-voltage power-system projects, SBL delivers engineered solutions designed for reliability, safety, and long-term performance.

TRANSMISSION CAPACITY ENGINEERED
0 + kV
SUBSTATIONS & PROJECTS COMPLETED
0 +
COMPLIANCE & INFRASTRUCTURE RELIABILITY
0 %

Capabilities & Expertise

KEY DELIVERABLES

SBL Engineering delivers high-end electrical infrastructure, substation rehabilitation, and advanced protection systems built to rigorous modern engineering standards.

Engineering Design

Comprehensive electrical, structural, and civil designs tailored to robust utility and industrial standards.

Substation Rehab

Modernizing legacy substation assets with minimal operational downtime, upgrading core breakers and safety.

132kV/33kV Infrastructure

Full-cycle construction and expansion of heavy transmission lines, substation bays, and grid feeds.

Capacitor Bank Design

Power factor correction and reactive power systems engineered to stabilize voltage and reduce losses.

HV Installations

Deployment of state-of-the-art GIS, air-insulated switchgear (AIS), and utility power transformers.

Protection & Control

Advanced relay programming, logic schemes, and automation systems to safeguard continuous grid uptime.

Equipment Supply

Direct procurement of premium, certified high-voltage switchgear, retrofits, and grid components.

Testing & Commissioning

Comprehensive site and factory acceptance testing (SAT/FAT) ensuring seamless compliance.

Documentation

Accurate as-built schematics, regulatory filings, operation manuals, and single-line diagrams (SLDs).

Lifecycle Support & Maintenance

Preventative diagnostics, infrared thermography, and scheduled servicing plans. SBL keeps critical infrastructure operational, minimizing failures with engineering-grade technical dispatch.

SBL PORTFOLIO

FEATURED PROJECTS

Selected engineering projects demonstrating SBL's experience in power infrastructure, substation rehabilitation and high-voltage electrical systems.

All Projects Substations High-Voltage

POWER & ENERGY

The Rehabilitation of 2 × 60MVA 132/33kV GIS Sub-Station

Location: Apapa Road, Lagos

Rehabilitation of a critical 132/33kV GIS substation designed to guarantee complete system efficiency, modernize switchgear protection, and secure regional grid stability. Engineered meticulously to minimize losses and sustainably feed Lagos' primary industrial gateway.

KEY DELIVERABLES
  • Refurbishment and testing of SF6 Gas Insulated Switchgear
  • Control room modernizing with advanced protection relay panels
  • Auxiliary power supply updates & battery bank retrofitting

PROJECT PORTFOLIO

Apapa Project: GIS Infrastructure Gallery

A technical look into our high-voltage Gas Insulated Switchgear (GIS) installations and structural optimizations completed at the Apapa substation site.

132kV GIS Switchgear

Highly insulated sulfur hexafluoride (SF6) switchgear bays delivering robust protection and compact spatial design.

Control & Monitoring

Real-time automated control logic and SCADA interface integration for precise substation diagnostics.

Transformer Coupling

Power distribution coupling step-up structures optimized for low impedance and optimal grid phase matching.

Testing & Diagnostics

Rigorous localized gas leak tests and complete dielectric testing preceding the official grid commissioning.

POWER & ENERGY

Engineering Design and Construction of a 60MVA 132kV Capacitor Bank

  • Apo Sub-Station, Abuja

Engineering design and construction of a major high-voltage capacitor-bank installation. This critical infrastructure system is designed to optimize grid power factor, dramatically improve voltage profiles, and significantly reduce transmission losses across the metropolitan power distribution network.

KEY DELIVERABLES

  • High-voltage 60MVA capacitor bank installation
  • Advanced 132kV switching and protection systems
  • Full substation substation integration and SCADA testing
PORTFOLIO & TECHNICAL EXHIBITION

Apo 132kV Project Gallery

Detailed visual record of high-voltage engineering execution, focusing on 132kV grid integration, specialized gas-insulated switchgear installations, and substation structural design.

132kV GIS Switchgear

Premium sulfur hexafluoride (SF6) gas-insulated assembly optimized for minimum clearance footprint.

AIS Outdoor Busbar

Rigid aluminum tubular busbars and support structures designed for extreme wind load resilience.

120MVA Transformer Bay

High-capacity step-down transformer integration with automated fire suppression and real-time gas monitoring.

Shunt Capacitor Banks

Grid-scale reactive power compensation block supplying stability controls and reducing local line losses.

POWER & ENERGY • KEFFI, NASARAWA STATE

Engineering Design and Construction of a 25MVA Capacitor Bank

Complete engineering design and robust construction of a high-efficiency 25MVA capacitor-bank installation. This project significantly stabilizes grid voltages, mitigates power factor penalties, and optimizes substation infrastructure performance across Keffi and neighboring zones.

  • Design & placement optimization analysis
  • High-voltage shunt capacitor-bank configuration
  • Automated switching & grid protection panels
  • Pre-commissioning tests & final utility integration

Keffi Project Gallery

High-Voltage Capacitor Bank & Power Infrastructure Asset Portfolio

110kV Shunt Capacitor Bank

Optimized reactive power support framework reducing line losses and stabilizing grid voltage profiles at Keffi.

Control & Protection Bays

Modern automated protection systems monitoring capacitance values, inrush currents, and transient overvoltages.

Damping Air-Core Reactors

Inductive current-limiting devices paired with capacitor units to suppress severe switching transients.

33kV Switchgear Integration

SF6 gas-insulated circuit breakers specifically engineered to handle highly capacitive switching currents.

ENGINEERED TO PERFORM

Every project is delivered with a disciplined focus on technical integrity, safety, operational efficiency and long-term reliability. By anchoring innovative power engineering in proven methodologies, SBL ensures your high-voltage infrastructure performs cleanly under the most demanding workloads.

  • Technical integrity anchored in robust QA/QC processes
  • Rigorous zero-harm safety standards and protocols
  • Optimized long-term operational efficiency

SPEAK TO AN SBL ENGINEER

Have complex engineering parameters or operational timelines? Consult with our technical engineering team to map out robust, high-performance solutions.

GET IN TOUCH

Stephenson Brothers Limited © Copyright 2026 - All Rights Reserved

Request Engineering Quote

✓

Inquiry Submitted

Your quote request has been forwarded to our technical team.

Project Overview

Technical Specifications

Analyzing structure specifications...

Project Imagery

Division Overview

Solving Industrial Problems

Division solutions content...

Key Partnerships: IMEFY, Nissin Electric