ABB FOCS-FS fibre-optic current sensor

ABB’s fibre-optic current sensor FOCS-FS is suitable for high-voltage applications. The sensor complies with IEC 61850 open systems communication protocol, enabling interoperability with equipment from other vendors.

The sensor will facilitate the development of digital substations and enable the grid to get smarter, and is suitable for current measurement applications in 245 to 800 kV substations. Conventional current- and voltage-measuring devices in substations are comprised of oil- and SF6-based instrument transformers. However, these devices are heavy, weighing up to several tons. They also consume significant amounts of space.

The device is free of magnetic saturation, making it suitable for capturing fast transient currents, short-circuit currents, and AC with DC offset. It does not use oil or gas and eliminates the risk of explosion.