HK Electric has revolutionized its inspection process by deploying a remote control robot, called the Intelligent Steward, through a 5G network in a confined cable tunnel at its Cyberport switching station.

This cutting-edge technology has significantly increased the frequency of inspections, from once or twice a year to a daily basis.

Andrew Yan Ka-wing, the head of construction and maintenance of the transmission and distribution division of HK Electric, said that the robot has saved both time and manpower by eliminating the need for extensive preparation work before each inspection.

"Traditionally, HK Electric would send a team of at least six individuals into the tunnel for inspections, with two personnel required to enter while others remained outside as a safety precaution," he said.

However, with the implementation of the advanced robot, this cumbersome process has become a thing of the past.

"The confined environment of the tunnel poses risks to human life, making gas detection and ventilation measures crucial to ensure the safety of staff," Yan said. "By deploying the robot, the company has eliminated the need for human entry, reducing potential hazards."

The Intelligent Steward, equipped with six cameras, including an infrared camera, a high-definition camera, and four standard-definition cameras, as well as sensors and gas detectors, captures images and records gas concentrations, humidity, and temperature within the tunnel.

The data is then transmitted to the offices. The robot's steady movement, facilitated by its two wheels, allows engineers to remotely control its positioning for further inspection of specific cables in the one-kilometer inclined tunnel.

To support seamless communication between staff inside the tunnel and those outside, HK Electric collaborated with Hutchison Telecommunications Hong Kong to establish a 5G network within the tunnel.

Previously, due to the lack of fiber-optic cables, radio walkie-talkies were used for communications. Now, staff members can easily connect with their colleagues outside the tunnel using their phones, while the robot continuously transmits data to the offices without any delays, thanks to the robust 5G network.

The project received a HK$500,000 subsidy from the Subsidy Scheme for Encouraging Early Deployment of 5G, indicating the significance and support for such innovative initiatives.

HK Electric plans to expand the 5G network to all cable tunnels and further enhance the capabilities of the remote control robot after a successful trial period, lasting three to six months.

Hutchison Telecommunications' Jess Mak, Andrew Yan and Thomas Yeung.

The robot at work.

Remote robot makes easy work of 5G tunnel inspections