Telephone+44 (0)1492 472141


CONTRELEC is a team of experienced electrical engineers with over 20 years experience in electrical design, manufacturing and commissioning with particular expertise with Ross Hill and Hill Graham Controls SCR systems. We supply spare parts, repair, test and calibrate AC and DC control modules and PCBs used on Ross Hill and Hill Graham Controls SCR Systems.

SCRLogic - The SCR Logic Training Simulator Software for Rig Electricians

We design, deliver and support electrical engineering projects, from simple machine controls to large scale production and process line systems. Our key skills include:

AC Modules

AC and DC Control Modules Modification, Calibration and Repair

We calibrate and repair Hill Graham and Ross Hill type AC and DC Control Modules. We provide spare parts and incorporate many of the internal modifications which are a feature of many Hill Graham Controls systems. Our unique simulators feature variable frequency and voltage supplies for a more realistic testing environment.
Hill Graham and Ross Hill Spare Parts

Hill Graham and Ross Hill Spare Parts

Contrelec offer competitive pricing and fast delivery on all Ross Hill Controls and Hill Graham Controls spare parts. This includes difficult-to-source Printed Circuit Boards (PCBs) and other bespoke components, such as Foot Throttle and Hand Throttle assemblies. We are able to engineer solutions to replacing obsolete parts with modern substitutes and ensure the upgrade meets the technical requirements.
AF Module Repairs

AF Module Repairs

We repair Hill Graham Controls AF Modules and can prolong the service life of Hill Graham AF Drives by replacing the Message Display CPU with a modern embedded controller, or replacing the front panel LCD meters.

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A complete programmable flexible control panel for £2500

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