Earthing Transformer and DC Power System for Nigeria’s Grid Upgrade
We’re excited to share the latest update from Nigeria. The earthing transformer and DC integrated power supply system Tengyi Electric built for Nigeria’s largest national grid operator are now off the production line and moving through pre-shipment testing, right on schedule.
Project Location: Nigeria
Client Industry: National Power Grid / Transmission Utility
Project Scope: Substation earthing transformer + DC integrated power supply system, full package supply
Background del progetto
For Nigeria’s grid upgrade, our client needs to enhance substation safety and protection reliability. They require an earthing transformer to establish system grounding and a DC power system to support critical control and communication. To ensure technical compatibility and simplify logistics, our client chooses an integrated “all-in-one” package. This approach guarantees that primary grounding and secondary protection work in perfect harmony, ensuring a reliable, site-ready solution.
Approved Drawings
In cross-border grid upgrades, ensuring new equipment seamlessly matches existing infrastructure is critical. This approved drawing directly addresses our client’s need for accurate advance site preparation by locking in exact weight data for foundation construction and specific CT parameters for relay protection compatibility. This process highlights our core advantage: rigorous custom engineering and proactive technical alignment. By resolving potential civil and electrical integration issues before manufacturing begins, we help clients completely eliminate the risks of on-site mismatches and costly rework, ensuring a smooth, plug-and-play installation overseas.
Manufacturing Highlights
1. Equipment Advantages
- High-Spec Protection: The earthing transformer features 5P20 high-accuracy CTs and a full safety suite (gas relay, pressure relief valve, and oil level indicator).
- Intelligent DC System: Features an HMI touchscreen for real-time monitoring, surge protection (SPD), and modular cabinets designed for flexible battery capacities and tidy, labeled wiring.
2. Problem-Solving Capabilities
- Challenge: Overseas projects often face installation delays caused by mismatched equipment bushings and site busbars, or compatibility issues between primary and secondary systems.
- Our Solution: We customized the transformer’s bushing positions to align perfectly with existing site cables. By providing the primary (transformer) and secondary (DC system) as a unified package, we eliminated integration conflicts and ensured a zero-rework, plug-and-play installation.
Production and Quality Control
Every earthing transformer goes through the oil-filling area for sealing and electrical testing once assembly is done. Every DC power cabinet gets powered up and run under full load before it ships, so we know the modules hold steady and every branch breaker does its job. Cabinets are built in matched sets and clearly numbered and so on — which makes phased installation a lot easier once they’re on site.
From the video, we can see the high-quality craftsmanship of the earthing transformer and DC system customized for the Nigeria project. From the precise bushing alignment to the tidy internal wiring, every detail is engineered for seamless on-site installation and reliable performance. This integrated package is now ready to support the local grid upgrade.
Conclusion
Whether it’s an earthing transformer keeping a system safely grounded or a DC power system keeping the secondary equipment running, the principle at Tengyi is the same: reliability comes down to the details. We support our grid customers worldwide from design through manufacturing to delivery.
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