Colombia Chilca 500/220 kV Substation Project

In 2024, Colombia’s power sector embarked on a critical infrastructure upgrade with the construction of the 500/220 kV Chilca Substation (Chilca Substation) in Lima. As a key project to enhance the stability of the local high-voltage power grid and meet the growing electricity demand of surrounding industrial and residential areas, the project had strict requirements for electrical wires—reliability, compliance with international standards, and cost-effectiveness were non-negotiable. Dongguan GERITEL Electrical Co., Ltd. was honored to be the designated wire supplier for this project, providing high-quality, UL-certified wires that solved the client’s core pain points and ensured the smooth progress of the substation construction.

1. Challenges Faced by the Chilca Substation Construction Team

The Chilca Substation project, located in Lima, Colombia, is a large-scale high-voltage power infrastructure project undertaken by a local leading power engineering company. Its main function is to convert 500 kV high-voltage electricity into 220 kV medium-voltage electricity for transmission to nearby industrial zones and urban areas, playing a pivotal role in optimizing Colombia’s power distribution network. However, during the early preparation stage, the project team encountered several key challenges that threatened the project’s progress and quality.

First, the substation operates in a high-voltage environment, requiring wires that can withstand extreme electrical loads and harsh environmental conditions—Lima’s hot and humid climate, coupled with occasional heavy rainfall, demands wires with excellent moisture resistance, heat resistance, and corrosion resistance. Second, as an important infrastructure project, the client had strict requirements for product certification: all wires must hold UL certification to meet the safety standards of the U.S. and Latin American power industries, ensuring long-term safe operation without potential safety hazards. Third, the client struggled to find a supplier that could balance quality, certification, and cost—many international suppliers offered either certified but overpriced products or low-cost but uncertified wires that failed to meet project standards. Finally, the project had a tight construction schedule, and the client needed a supplier with rich project experience to provide accurate product specifications, timely delivery, and professional technical support to avoid delays.

After extensive market research and comparison, the client chose Dongguan GERITEL Electrical Co., Ltd. because of our strong strength in product quality, complete certification system, rich experience in undertaking large-scale substation projects, and high-cost performance—all of which perfectly matched the project’s core needs.

2. Matching High-Quality Wires to Project Needs

Based on the Chilca Substation’s operational requirements and the client’s pain points, our team conducted in-depth communication with the project’s electrical engineers, analyzed the specific application scenarios of each type of wire, and provided a tailored wire supply solution, focusing on four core wire types: Instrumentation Cables (Type TC), SIS Cable, Bare Copper, and XHHW-2. Each product was selected for its unique advantages, addressing the client’s concerns about quality, safety, and applicability.

For the substation’s signal transmission system, we recommended Instrumentation Cables (Type TC) instead of Type MC-HL. The key difference between Type TC and Type MC-HL lies in their structure and application scenarios: Type MC-HL is mainly designed for heavy-duty industrial environments with armor protection, which is unnecessary for the substation’s internal signal transmission and would increase unnecessary costs. In contrast, Type TC features a flame-retardant cross-linked polyethylene (FR-XLPE) insulation and a thermoset chlorinated polyethylene (CPE) jacket, making it lightweight, flexible, and easy to install in tight spaces inside the substation. We provided Type TC in sizes 14 AWG (7 strands) to 8 AWG (7 strands), with 4 to 12 conductors, which are ideal for transmitting precise signals between the substation’s control system and monitoring equipment. Its silicone-free design ensures no interference with sensitive instrumentation, and it can operate continuously at 90°C in both wet and dry locations, perfectly adapting to Lima’s climate.

For the substation’s switchboard interconnection and protective device operation, we supplied SIS Cable, a specialty cable designed specifically for utility substation switchboards and Class 1E low-voltage applications. We provided SIS Cable in sizes 18 AWG to 2 AWG, with tinned annealed copper conductors and FR-XLPE insulation that is heat, moisture, and radiation resistant. Compared to ordinary control cables, SIS Cable has higher flame resistance (meeting VW-1 vertical flame test standards) and better electrical stability, ensuring reliable operation of the substation’s protective devices—critical for preventing electrical faults and ensuring grid safety. Its gray insulation color also facilitates identification and maintenance during the project and later operation.

For the substation’s grounding system and overhead distribution lines, we provided Bare Copper conductors, which are essential for ensuring electrical safety and reducing the risk of lightning strikes. We supplied Bare Copper in sizes ranging from 250 kcmil to 750 kcmil, with concentric stranded construction complying with ASTM B3 and ASTM B8 standards. Bare Copper was chosen over other conductive materials because of its excellent electrical conductivity, corrosion resistance, and ductility—unlike aluminum conductors, it does not oxidize easily, ensuring long-term grounding performance and reducing maintenance costs. The 350 kcmil Bare Copper conductors we provided were specifically used for the substation’s main grounding bus, ensuring efficient dissipation of fault current and protecting equipment and personnel safety.

For the substation’s power distribution lines, we supplied XHHW-2 cables, including the key product 350 kcmil XHHW-2 industrial cable. XHHW-2 is a flame-retardant polyolefin-insulated power cable with XLPE insulation, which is formed by cross-linking PE material to form a mesh structure, giving it excellent heat resistance, pressure resistance, and environmental crack resistance. The 350 kcmil XHHW-2 industrial cable we provided has a conductor structure of 37 strands of 2.47 mm copper wire, an insulation thickness of 1.65 mm, and an outer diameter of 20.72 mm, capable of withstanding 600V voltage and operating continuously at 90°C. Compared to ordinary PVC-insulated cables, XHHW-2 has better heat resistance (can withstand 130°C in emergency overload and 250°C in short circuit conditions) and longer service life, making it suitable for the substation’s high-voltage power distribution needs. Its direct burial capability also eliminated the need for additional protective conduits in some installation scenarios, reducing the client’s construction costs and time.

XHHW-2 cable industrial application

3. UL Certification and Strict Quality Control

Safety is the top priority for high-voltage substation projects, and our core advantage lies in our complete certification system and strict quality control process—all wires supplied for the Chilca Substation project hold UL certification, complying with UL 1277 , UL 44 , and ASTM standards. This UL certification was a key factor in the client’s decision to choose us, as it directly demonstrates that our products meet the strict safety and performance requirements of the U.S. and Latin American power industries, eliminating the client’s concerns about product non-compliance and potential safety risks.

In addition to certification, we implemented strict quality control throughout the production process. From the selection of raw materials—we use high-purity copper conductors (complying with ASTM B3) and high-quality XLPE insulation materials—to the production, testing, and packaging stages, each step is supervised by professional quality inspectors. For example, all XHHW-2 cables undergo insulation thickness testing, voltage withstand testing, and flame resistance testing before leaving the factory; Bare Copper conductors are tested for electrical conductivity and breaking load to ensure they meet project specifications. We also provided the client with detailed test reports for each batch of products, allowing them to verify quality at any time and ensuring full transparency in the supply process.

4. Efficient Cooperation to Ensure Project Progress

Understanding the tight construction schedule of the Chilca Substation project, we prioritized this order in our production plan and established a dedicated project team to coordinate production, testing, and logistics. Before production, our technical team communicated with the client’s engineers again to confirm all product specifications, including conductor size, number of strands, insulation thickness, and packaging requirements, to avoid any errors.

During production, we provided the client with real-time updates on production progress, allowing them to grasp the delivery timeline and make corresponding construction arrangements. After production was completed, we arranged for professional logistics services to transport the wires from Dongguan, China, to Lima, Colombia, ensuring that the products arrived in good condition and on time. We also provided detailed installation guidelines for each type of wire, including installation precautions for Type TC Instrumentation Cables in tight spaces and grounding requirements for Bare Copper conductors, helping the client’s construction team complete the installation efficiently and correctly. Our after-sales team was also on call 24/7 to answer any technical questions during installation, ensuring that the project was not delayed due to wire-related issues.

5. High-Quality Wires Lay the Foundation for Grid Stability

With our high-quality wires and professional services, the Chilca 500/220 kV Substation project was completed on schedule and passed the local power department’s acceptance test in late 2024. The wires we supplied have been operating stably since the substation was put into use, with no quality problems such as insulation damage, signal interference, or grounding failure.

The Instrumentation Cables (Type TC) ensure accurate signal transmission between the substation’s control system and monitoring equipment, enabling real-time monitoring of the substation’s operating status and timely detection of potential faults. The SIS Cable guarantees the reliable operation of the substation’s protective devices, effectively preventing electrical short circuits and other accidents. The Bare Copper conductors provide a stable grounding system, protecting the substation’s equipment and personnel safety. The XHHW-2 cables ensure efficient and stable power distribution, meeting the electricity demand of surrounding industrial and residential areas. The successful operation of the substation has not only improved the stability of Colombia’s power grid but also promoted local economic development.

6. Cooperation Value and Client Feedback

Our cooperation with the Chilca Substation project not only solved the client’s core pain points but also created long-term value for both parties. By providing UL-certified, high-quality wires at a competitive price, we helped the client reduce project costs while ensuring project quality and safety—compared to other suppliers, our solution saved the client approximately 15% of the wire procurement cost. Our rich experience in undertaking large-scale substation projects also helped the client avoid many potential risks in the wire selection and installation process, improving construction efficiency.

The client highly recognized our products and services, emphasizing that our wires fully met the project’s strict requirements for quality and certification, and our professional technical support and efficient delivery ensured the smooth progress of the project. They also noted that the durability and stability of our wires would reduce the substation’s maintenance costs in the long run, and they expressed their willingness to cooperate with us on future power infrastructure projects in Colombia.

7. Choose Dongguan GERITEL for Your Wire Export Needs

The Colombia Chilca 500/220 kV Substation project is a testament to Dongguan GERITEL Electrical Co., Ltd.’s strength in wire export, product quality, and project service capabilities. Whether you are undertaking a high-voltage substation project, industrial plant construction, or other electrical infrastructure projects, we can provide you with tailored wire solutions that meet your specific needs.

Our advantages are clear: we offer UL-certified, high-quality wires (including Instrumentation Cables (Type TC), SIS Cable, Bare Copper, XHHW-2, and the 350 kcmil XHHW-2 industrial cable), have rich experience in undertaking large-scale international projects, provide competitive prices, and offer professional technical support and efficient delivery. We are committed to helping our clients solve their wire procurement pain points and achieve project success.

If you are looking for a reliable wire supplier for your international project, please contact us today. We will provide you with a free consultation and customized solution, helping you achieve your project goals with high-quality products and professional services.