• About CONTRELEC
• Hill Graham Spare Parts
• Module Health Check
• SCR Systems
• SCRLogic Training Simulator
• Troubleshooting
• Engineering Design
• PLC Programming
• Versapanel
• Switchboards
• Device Co-ordination
• Fault Calculations
• Harmonic Analysis
• Maintenance & Support
• Manuals & Procedures
• Calculators
• Contact Us

• AF Module CPU Replacement
• AF Module LCD Meters
• Jack-Up Upgrade
• SCR Replacement
• Land Rig PCR
• SCR Training House
• Surge Suppression
• Air Starter Panels
• Automatic Door Testing Unit

• FutureNet DASH

• SCRLogic Training Simulator
• Versapanel
• How to Commission a Generator Section
• Power Factor Correction for Drilling Rigs
• SCR Systems
• Calculations
• Troubleshooting Mud Pump Field Supplies
• Troubleshooting Power Limit Problems

About CONTRELEC

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.

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 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 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 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.
	Drilling Rig SCR Systems and Switchboard Design Utilising modern Electrical and Mechanical 3D CAD software we accurately engineer switchboard designs. All aspects of the design are modelled including components, busbars, insulation barriers, wireways, trunking, labels and instruments. The benefits of 3D design include: improved build time, accurate design checking, easy to understand assembly drawings and total design confidence. Our scope ranges from simple starter control panels up to complete containerised power generation and distribution solutions.
	Short Circuit Calculations, Protective Device Co-Ordination and Harmonic Analysis Using sophisticated software we are able to model power systems and calculate short circuit levels to ANSI and IEC standards. From the same on-line drawing we can generate time/current co-ordination curves and a comprehensive schedule of device settings. Our Harmonic Analysis tool is able to accurately predict expected levels of total harmonic distortion introduced by variable speed drives, UPS's and other harmonic sources, and analyse the effect of adding filters to the system.
A complete programmable flexible control panel for £2500 Click for for more information