Western Australia has responded to a request from South Australia for replacement transmission towers, after more than 20 were destroyed.

Three towers and equipment have been loaded into containers in Jandakot.

Western Power's metro response manager Jeff Spinner said WA has had emergency transmission towers on standby for more than three years.

"It was an industry standard put together a few years ago, and obviously we haven't had to deploy ours in anger, we've used them to train," he said.

"We received a phone call from our industry friends in South Australia who obviously had a bad weather incident.

"Really, all they were after were these emergency restoration system towers, because they had 22 towers down so we can contribute three."

The towers can be extended to 58 metres in height, and while it only takes a day to erect them, operational capability depends on a range of local factors.

Mr Spinner said WA should be able to release the towers for several months.

"We're quite prepared to lose them for at least the next six months to 12 months, just depends how long it takes for them to rebuild their lines so, as long as it takes."

The towers are expected to reach South Australia by Saturday.