Series Three

Market-leading safety solutions for rail

GKD Technologies is the leading supplier of envelope and load control systems for Road Rail Vehicles (RRV’s) in the UK. The Series 3 is specifically developed for the rail industry and has achieved full Network Rail RIS-1530-Issue 6 approval.

The system meets all the requirements for tandem lifting, overnight working, working under overhead cables, and adjacent and open line operation. With over twenty-five years of development, the Series 3 represents ultimate reliability and accuracy.

It uses the latest sensor technology to monitor the machine’s load status and compares it to the machine’s true lift capacity while monitoring the boom position, slew, gradient, rail cant, and axle lock configuration. By continuously calculating this data, the operator is able to make full use of the machine’s lift capacity in every position.

The state-of-the-art touch screen display increases performance, reliability, durability and ruggedness, as well as optimising the interface and information shown to the operator.

A reliable high performance device

To attain approval for working in close proximity to live overhead wires or adjacent to open rails, the Series 3 Rated Capacity Indicator has been extensively enhanced to protect against system sensor malfunction, software inconsistency and electronic failures.

  • Dual processing verification.
  • Dual sensors.
  • Gyro compensated gravity angle sensors.

Suitable for use on road rail excavators and road rail MEWPs.

Key features

  • Full Network Rail RIS-1530-Issue 6 approval as a High Performance Movement Limiting Device.
  • Intelligent control ensures machine can be recovered to the safe working zone but prevents movement further into overload.
  • Capable of tandem lifting with no additional de-rate or panel restrictions.
  • Hydraulic motion cut provides graduated, smooth control of hydraulic functions as they approach the set limits.
  • Multi-point virtual wall capability, as well as height and slew limits.
  • Easy (push button) lifting duty selection, with 57 zones within the slew rotation.
  • Optional key switch controls enable supervisor limit setting and system isolation.
  • All actions are logged to support training, best practise review and near-miss or accident reporting.

You can find further details on each of these in the ‘features in detail’ section of this page.

Suitable for tracked excavators, wheeled excavators, backhoe loaders, and more.

Features in detail

Virtual walls
Ideal for highway construction, the 2LHS+ offers the option of a ‘Virtual Wall’ function. The virtual wall – also known as envelope control – function can be programmed to the safe parameters of the machine’s required working area. Working in conjunction with the slew and height control, this prevents the excavator’s boom operating outside its safe zone.This function increases the usability of the machine and allows for optimisation of the ‘working area’. Should the machine approach its pre-set limit an external audible alarm will warn the operator. The optional intelligent motion-cut, if installed, will stop the machine and only allow safe movement.Proportional control
The system has stepped proportional control for a smoother approach to slew or height limits. As an optional add-on you can also get full proportional control, for instances where precision and finite control are required.Trackside working
Dual process verification for Adjacent Line Open (ALO) working, so that the machine can work alongside open rail lines or roads, and for working when higher performance is required under overhead obstructions or wires.Always in control
The integrated supervisor key switch enables height, slew and load limits to be set and not overridden. The disable key switch allows the system to be switched off when not required.

Improved screen
The 2LHS+ has an improved larger screen, making it easy to read and operate in all light conditions and in open or closed cabs.