Today, as power systems move toward intelligence and digitalization, the stability and reliability of every connection are critical to ensuring the safe operation of the power grid. Among these connections, the electronic current and voltage transformers—often referred to as the "sensory organs of electricity"—are particularly crucial, with the quality of optical signal transmission within them being of paramount importance.

Nanjing Guangruyuan Optoelectronics Technology Co., Ltd., a technology-driven enterprise that has been deeply engaged in the specialty fiber optic cable sector for ten years, is precisely the “invisible guardian” of this critical link. Its custom multi-core bundled tail cables for current transformers—developed entirely in-house and now in mature mass production—have become a reliable choice for ensuring the stable operation of high-end power equipment, thanks to their profound understanding of extreme operating conditions and technical specifications that surpass industry standards.

From “ Pain point ” Departure: A Joint Effort Rooted in Reliability

Since 2014, Guangru Yuan Optoelectronics has been focusing on reliability research into custom-tail cables for current and voltage transformers. In the early stages, the team discovered that the internal environment of transformer insulators is extremely harsh: continuous self-weight stress caused by long-term vertical placement, strong electric fields generated by high voltages, and other factors all pose potential risks to the performance of conventional optical cable structures in such an environment.

“Customer challenges are precisely the starting point for our technological breakthroughs.” To address this, Guangru Yuan Optoelectronics has joined forces with upstream and downstream partners to launch a targeted joint design and materials innovation initiative. By reconfiguring the internal stress distribution within optical cables and carefully selecting and customizing specialized insulating materials, the team has not only successfully tackled the longstanding industry challenge of vertical placement stability but has also simultaneously achieved significant improvements in product structural strength and fiber optic density.

This breakthrough laid the technological foundation for the product’s high reliability and long service life, and also earned the trust of our first batch of high-end customers.

Four Core Advantages: Defining a New Standard for “Reliable Connectivity”

1. Reliable insulation, unafraid of high-voltage electric fields.

By employing customized insulation materials and structural designs, the optical cable is ensured to exhibit excellent dielectric strength and puncture resistance within the high-voltage electric field inside the current transformer, thereby guaranteeing stable and reliable insulation performance.

2. Vertically stable, resisting time and stress.

To address the unique stress conditions associated with vertical installation, a precise cable structure and advanced manufacturing processes are employed to ensure that, under long-term exposure to self-weight stress, the optical performance and physical integrity of the fiber optic cable remain unaffected.

3. Ultra-low loss, ensuring signal integrity and zero distortion.

Relying on core process control, we achieve extremely low insertion loss at the connection points, ensuring that even weak optical control signals are reliably transmitted.

Energy can be transmitted completely, accurately, and in real time.

4. Mechanically robust, capable of handling complex operating conditions.

The connector features high-precision machining and enhanced protection, offering excellent resistance to vibration, shock, and a wide operating temperature range, ensuring a secure connection that remains as robust as ever under various complex conditions in substations.

More than just products: Providing trusted connectivity solutions.

Guangruyuan Optoelectronics deeply understands that what it delivers is not merely high-quality products, but also a commitment to the long-term safe operation of power systems. Grounded in proprietary technologies and continuous innovation, Guangruyuan Optoelectronics is constantly deepening its technological expertise in the field of specialized fiber optic connections, striving to provide superior-performance, lifelong-reliable connection solutions for sectors such as smart grids, new energy, and industrial internet. With dependable connections, we safeguard the lights that illuminate countless homes.