BLENHEIM, N.Y. — U.S. utilities see great potential in the use of remote-controlled drones to do the often-dangerous work of inspecting power lines and transmission towers but strict regulations have so far slowed adoption of the technology.

The remote-controlled devices make the work of linemen safer, more efficient and less expensive, according to the Electric Power Research Institute, which last month put on a three-day workshop to help nearly a dozen utilities choose the best machines for the job. Miniature helicopter-like drones, some equipped with cameras and other sensors, conducted demonstration inspections of transmission lines at a hydroelectric plant in the Catskill Mountains.

“We want to start using drones next spring when the inspection season begins,” said Alan Ettlinger, research and technology director for the New York Power Authority, who attended the workshop.

Utilities spend millions of dollars inspecting power lines, which are often in hard-to-reach places. The industry has been interested in the potential use of drones for years, but has been slower than European companies to adopt the technology because of U.S. regulatory restrictions.

While hobbyists can fly drones without certification, the Federal Aviation Administration requires special certification for commercial users. There are numerous conditions: The drone operator needs a pilot’s license, the aircraft must weigh less than 55 pounds, flights can go no more than 200 feet above the ground, and the drone must be operated in the pilot’s line of sight.

The FAA treats the operation of drones like any other aircraft for safety reasons and commercial operators face strict rules for getting permission to use them, according to the agency.

Seven U.S. utilities have been granted FAA approval for testing drone technology in 2015. Consumers Energy in Michigan conducted a series of tests over the summer using its own eight-rotor drone and unmanned aerial vehicles operated by outside vendors to inspect wind turbines, utility poles and transformers.

“When you look at the amount of information we can gain to make accurate decisions about our systems, and look at the cost and time savings, this is a huge opportunity for us,” said Andrew Bordine, a Consumers Energy executive.