Automated Cable Installation Equipment (ACIE)


The ACIE project is the most complex undertaken by CEL to date. The first of two machines was installed on site 16 months after the contract award. The ACIE machines were ordered by Balfour Beatty for use on the London Power Tunnels (LPT) project.

The ACIE design was derived from a comprehensive customer specification and has the following features:

  • Bi-directional – can perform functions operating in either direction along the tunnel
  • Cable towing - can pull cable along the tunnel at speeds of up to 5 kph with a hauling force of up to 1.2 tonnes, either side pull or monorail delivery.
  • Manipulates 400kVA cable (150mm diameter) and 132kVA cable (90mm diameter) to install on stanchions and introduce a closely controlled sag between stanchions.
  • Maximum machine width 1.2m
  • Maximum length of individual module 2.5m
  • Operates in any tunnel diameter between 3.0m and 4.0m, flat or round invert
  • Data-logging of all safety functions and cable installation metrics
  • Maximum speed 5 kph
  • Maximum static pull 3 tonnes
  • Winch fitted with 100m rope, maximum pull 2 tonnes
  • Storage for cleat over straps and short circuit straps and associated hardware.

The ACIE machine makes extensive use of CanBus technology and is built around Danfoss Plus1 components.  Primary power is provided by a 37kW Perkins engine driving a pair of hydraulic pumps, one for the drive function and one for the auxiliary functions.

To see the IVT magazine article on the ACIE, Click here. We are on page 100.


The cable manipulating and sagging functions are explained by an animation. Please watch the video below.


Clayton Engineering are members of the following organisations: Member - British Safety Council TWI - World Centre for Materials Joining Technology LEEA - Lifting Equipment Engineers Association ISO9001