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Robots that insulate energized lines.

Line-crawling robots build durable insulation on the existing conductor while the line stays energized.

Installation on an energized line

Mount

A line crew lifts the robots onto the energized conductor.

Insulate

The robots crawl the span, building weatherproof insulation on the conductor as they go.

Dismount

The robots are moved to the next span.

Our insulation

The existing wire

It stays in service: nothing is cut, pulled or replaced.

Witching Hour insulation

Built directly on the wire in place: thin and light, weatherproof and durable.

Covered conductor

A much thicker, heavier factory jacket that comes on new wire, so installing it means replacing the wire.

Field-deployed with Bear Valley Electric Service.

4 kV residential circuitsMultiple wire-miles insulatedNo planned outage

“We are mindful that our customers rely on us to steward our resources efficiently. Witching Hour's technology could allow us to harden the grid faster and cheaper, and we consider that a win for the entire community.”

Paul Marconi

President, Bear Valley Electric Service

Tested in the lab, demonstrated in the field.

Lab

Testing at Florida State University's Center for Advanced Power Systems

National lab

Research agreement with Oak Ridge National Laboratory, funded by the U.S. Department of Energy

Live line

Live-line contact testing at Knoxville Utilities Board

In the field

Multiple wire-miles deployed on live customer circuits with Bear Valley Electric Service

Robotic wildfire hardening for the grid

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