Electrical Review

Harting has introduced new crimp termination versions of its Han(R) Q 2/0
family of high-voltage power interface connectors.

The connectors use Harting's proven Han(R) C power contacts in the
cross-section range from 1.5 mm2 to 10 mm2 or 16 AWG to 8 AWG.

Using new high-temperature connector technology allows Hindhead tunnel to combine improved electrical safety, in temperatures up to 400˚C, with reduced maintenance time and costs

One of the biggest challenges of building the longest non-estuarial road tunnel in the UK is making sure people have sufficient time to escape from the twin tunnels in the event of a fire. For the Hindhead Tunnel, that meant finding a way to maintain the power supply to the extractor fans despite extremely high temperatures.
The Hindhead Tunnel is a major construction project with a total cost of over £370m. Running for 1.2 miles and with a maximum depth of 65 metres, the twin tunnels pass beneath the Devil’s Punchbowl, near Hindhead in Surrey, to complete the dual-carriageway link on the A3 bypass between London to Portsmouth. For users, the tunnel promises faster journey times; for local residents the tunnel will significantly reduce the traffic congestion that blights this area of outstanding natural beauty.