Serving Africa and beyond

Engineering that keeps industry running

Consultancy, control systems, protection and structures, designed, built and commissioned by engineers who stay until it works. When a plant stops, we get it running. When it runs, we keep it safe.

See Our Work → Discuss a Project

Tea blending plant hoppers and control equipment after commissioning

Featured: full control system re-engineering, 1.5-ton tea blending plant

Control & AutomationPLC, HMI, panels, commissioning

Protection & InstrumentationStudies, settings, testing

Structures & TrainingBuilding works, supplies, engineering courses

What We Do

Engineering consultancy, centred on control and protection

Our core is control and protection engineering: we make plants run reliably and safely, and keep them protected. We work for manufacturers, processing plants, utilities and institutions.

Our specialism

Control Systems & Automation

From a single machine to a full process line, we engineer control systems that are safe, maintainable and easy to operate. We also revive installations that have failed and lost vendor support.

Control philosophy, functional design and I/O schedules
PLC programming (Siemens TIA Portal, Mitsubishi and others) and HMI/SCADA screens
Control panel design, build supervision and wiring drawings
Sequencing, interlocks, VFD integration and motor control
Dual-mode design: automatic PLC control with hardwired manual back-up
Troubleshooting, retrofit and revival of failed control systems
Factory and site acceptance testing, commissioning and operator training

Designed to IEC 60204-1 (electrical equipment of machines) and IEC 61131 (programmable controllers).

Protection Engineering

Protection studies, relay settings and coordination
Settings audits and fault investigation
Generator, transformer and feeder protection
Secondary injection testing and commissioning

Instrumentation

Sensor selection: level, position, speed, process
CT/VT specification and metering
Loop checks and calibration support
Instrument and cable schedules

Power System Studies & Design

Short-circuit studies to IEC 60909
Generator, transformer and switchgear sizing
Earthing and load-flow studies (ETAP)
Specifications and owner's engineer support

Electrical Installation Works

Electrical decommissioning with method statements
Panel installation, cabling and terminations
Testing and energisation

Featured Work

Projects that prove it

Operator touch-screen HMI on the new control panel

Custom motor-control function block in Siemens TIA Portal

Control & Automation

Full control system re-engineering of a 1.5-ton tea blending plant

KenyaFood processing2026Survey → Design → Commissioning

A tea processor's blending line had been out of service since its original control system failed. The line includes a rotating blending drum, bucket elevators, conveyors, a vibratory sifter, dust extraction and pneumatic gates. The original Mitsubishi FX3U-based controls were dead, and neither the manufacturer nor the original integrator offered support.

We took full engineering responsibility. That covered root-cause investigation, a new control philosophy, a PLC and HMI system engineered from scratch, removal of the old installation, and commissioning on site with product running through the line.

Safety & process interlocks

Reverse-flow safe start: no feeder runs until dust extraction is proven by run feedback.
Zero-speed drum interlock: the drum can't reverse without 0 RPM confirmed and a 15-second dwell.
Discharge protection: the gates close at once if a delivery elevator trips, preventing spillage.
Level control: capacitive high-level sensors stop feeding automatically when the hopper is full.
Hardwired emergency stop: isolates every motor independently of the PLC.
Motor supervision: every motor is monitored for run feedback and overload, with fault alarms on the HMI.

Investigation

Site survey, fault-finding on the failed system, review of OEM documentation, and mapping the process into five control phases.

Engineering design

Control philosophy to IEC 60204-1 and IEC 61131, I/O schedule and tag database, schematics, and specification of the PLC, HMI, motor starters, sensors and pneumatics.

Software

Siemens TIA Portal: a library of reusable motor-control blocks with auto, manual and service modes, feedback timeouts and start/stop delays, plus sequence logic and a multi-screen HMI.

Installation

Decommissioning of the old system under a written method statement. Installation of an IP65 control enclosure for the tea-dust environment, power and control wiring, and metering.

Commissioning

I/O checks, interlock proving, sequence trials and load commissioning with product. Handed over in August 2026.

Single-line diagram of a generating station used in the course

Generator capability curve derived in the course

Course material: station single-line diagram, generator capability curve and voltage profile, Rwanda 2026

Training & Capacity Building

Power System Design training of trainers, Rwanda

Rwanda27 Jul – 2 Aug 20267 days

We delivered a seven-day training of trainers for electrical engineering lecturers and instructors at a national technical college in Rwanda, as part of an international programme to strengthen technical and vocational education.

The whole week was built around a real generating station. Participants derived every design figure by hand, then proved it in their own ETAP model: generator rating, earthing, step-up transformer sizing and tap range, and short-circuit duty to IEC 60909.

Participants' scores improved markedly from pre-test to post-test, and every participant rated the content relevant and the delivery positively.

Training

Practical engineering training, taught by practising engineers

For colleges, utilities and industry. Every course is built around real plant, with hand calculations checked against software and hands-on labs. Pre- and post-tests measure progress.

Power System Design

Generating station design to calculation standard: rating, earthing, transformers, IEC 60909 fault studies in ETAP.

Custom Programmes

Training of trainers and in-house courses tailored to your plant, curriculum or team.

Request a Training Programme

Delivered on-site anywhere in Africa.

Also From Us

Building works & supplies

Beyond consultancy, we deliver structural building works and supply quality materials. One point of contact from design to delivery.

Structures & Building Works

Building structures for institutions, businesses and private clients.

Reinforced concrete structures
Foundations & substructures
Structural steel works
Residential & commercial buildings
Institutional buildings & classrooms
Industrial buildings & warehouses
Retaining walls & gabions
Renovation & refurbishment

Supplies & Materials

Sourcing and delivery of electrical, control and construction materials.

PLCs, HMIs, VFDs & sensors
Contactors, relays & switchgear
Control panels & enclosures
Cables, conduit & cable trays
Cement, aggregates & steel
Timber & formwork
Tools & PPE
Hardware & fasteners

Why Choose Us

Engineering-led, from first survey to final handover

Power-plant pedigree

Our engineers bring hands-on experience in generation, protection, excitation and plant commissioning.

Standards-based

Designs follow IEC standards, are documented in full, and are calculated before they're built.

We finish the job

We take on the systems others leave behind and stay until the plant is running and the operators are trained.

Across borders

Projects and training delivered in Kenya and Rwanda, and ready for work anywhere in Africa and beyond.

Licensed & Certified

National Construction AuthorityNCA Registered Contractor

Occupational Safety & HealthDOSH Registered Workplace

Get In Touch

Let's discuss your project

Tell us about your plant, your control or protection problem, or the training you need. An engineer will respond.

Call / WhatsApp+254 706 888 396

Emailinfo@conduitandconcrete.co.ke
conduit.concrete@gmail.com

Where we work

Kenya, Rwanda and across Africa

Postal Address

P.O. Box 16540 – 00620, Mobil Plaza, Kenya