Rural Electrification Project in Kenya | 200kVA Pole Mounted Transformer for Medium-Voltage Distribution
Bringing Stable Power to Remote Communities in Western Kenya
In early 2026, a local electrical engineering contractor in western Kenya contacted our team while preparing equipment for a rural distribution network expansion project. The project formed part of a regional electrification program aimed at connecting several villages, agricultural facilities, and public service buildings to the national 11kV distribution network.
The contractor had previously experienced repeated failures with locally supplied transformers. High winding temperatures during peak agricultural seasons and inconsistent voltage regulation had resulted in increased maintenance costs and frequent service interruptions.
For this project, reliability was considered more important than the lowest purchase price. The customer was looking for a transformer capable of operating continuously under high ambient temperatures while requiring minimal maintenance over its service life.
Project Summary
Project Location
Kakamega County, Kenya
Application
11kV Rural Distribution Network Expansion
Customer
Local EPC Contractor
End User
Regional Power Distribution Authority
Delivery Time
45 Days
Equipment Supplied
After reviewing the network design and expected load profile, our engineering team recommended a 200kVA Three Phase Pole Mounted Oil-Immersed Distribution Transformer.
Main Technical Specification
Rated Capacity: 200kVA
Primary Voltage: 11kV
Secondary Voltage: 415V
Frequency: 50Hz
Vector Group: Dyn11
Cooling Method: ONAN
Insulation Level: LI75AC35
Applicable Standard: IEC 60076
The transformer was designed specifically for outdoor pole-mounted installation, making it suitable for remote locations where regular maintenance resources are limited.
Engineering Considerations
Unlike urban distribution networks, rural feeders in western Kenya often experience significant daily load fluctuations.
Electricity demand typically increases during irrigation periods, maize processing seasons, and evening residential consumption. To improve voltage stability under these changing conditions, the transformer incorporated several design features.
The magnetic core was manufactured using high-permeability cold rolled grain-oriented silicon steel, helping to reduce no-load losses while improving operating efficiency.
Copper windings were selected to enhance thermal performance during extended periods of high loading.
A sealed tank structure was adopted to minimize moisture ingress during the rainy season and reduce routine maintenance requirements.
These design choices were based on the customer’s operational environment rather than simply following standard catalogue specifications.
Factory Testing Before Shipment
Before delivery, every transformer underwent routine testing in our factory in accordance with IEC 60076 requirements.
The testing program included:
- Turns Ratio Test
- Winding Resistance Measurement
- No-load Loss Test
- Load Loss & Impedance Test
- Applied Voltage Test
- Induced Voltage Test
- Insulation Resistance Measurement
- Oil Breakdown Voltage Test
- Leak Tightness Inspection
Each unit was released only after all test values met the contractual technical requirements.
Installation and Commissioning
Installation was completed by the local contractor together with the regional utility maintenance team.
Because many installation sites were located in mountainous villages with limited road access, the compact dimensions and optimized lifting structure of the transformer simplified transportation and pole installation.
Following energization, voltage measurements taken at the far end of the distribution feeders showed noticeably improved stability compared with the existing network configuration.
The transformer has now been operating continuously under outdoor conditions through both dry and rainy seasons.
Project Outcome
The completed installation now supplies electricity to more than 600 residential users, several schools, a rural medical clinic, local water pumping stations, and a number of small agricultural processing workshops.
According to feedback received during routine follow-up communication, the equipment has demonstrated stable operating temperatures, low operating noise, and consistent voltage performance during seasonal load changes.
The contractor also noted that the delivery schedule and technical documentation met the project requirements, allowing installation work to proceed withoutdelay.
Looking for Reliable Distribution Transformers for African Utility Projects?
Whether your project involves rural electrification, utility network upgrades, renewable energy integration, or industrial distribution systems, we supply customized transformer solutions designed to match local grid requirements.
Our engineering team supports utilities, EPC contractors, electrical distributors, and infrastructure developers with transformer solutions ranging from 25kVA to 50MVA, manufactured in accordance with IEC, ANSI, and customer-specific technical specifications.
About ZISHENG ELECTRICAL
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].
