Ross Hill and Hill Graham AC, DC and FR Module Testing
AC Module Testing
AC Simulator
Our unique, variable frequency simulator allows us to fully simulate all AC Module functions for rapid and fault-finding and accurate calibration. Because we use a simulator rather than a full-size, working generator we are able to emulate extreme and unusual conditions without risk of damage to the module or other equipment. Our objective is to test the module, not equipment connected to it!
Using our simulator we can simulate the following essential functions:
- Overfrequency - with the AC Module running on demodulator or pulse-pick-up speed feedback
- Underfrequency
- Loss of Pulse Pick-Up
- Overvoltage
- Undervoltage
- Reverse power
- Hands-Off-Starting (HOC)
- Speed Regulation
- KW Load Sharing (Master/Slave)
- KVAR Load Sharing (KVAR Droop)
- Exciter Firing
- KW and KVAR Demodulators and Instrumentation
- Diagnostic Functions (Front Panel Meter and Switch)
Each AC Module undergoes a rigorous set tests and is awarded a test certificate which details results of tests and records key measurements. A detailed description of faults found and their possible consequences is included wehere applicable.
DC Module Testing
Hill Graham Controls incorporated a large number of variations to the standard Ross Hill DC Module. Using our DC Simulator we are able to test and repair these modified versions safely and accurately as well as testing and repairing standard units from Ross Hill Controls. In many cases we are able to implement these modifications to new or old modules. This is particularly useful where spares and replacements are required. Modifications include:
 DC Simulator |
Using our DC Simulator we are able to perform the following test and calibration sequences safely and accurately:
Each DC Module undergoes a rigorous set tests and is awarded a test certificate which details results of tests and records key measurements. A detailed description of faults found and their possible consequences is included where applicable. |
FR Module Testing
FR Simulator
Our unique Field Regulator Simulator allows us to quickly, comprehensively and accurately test Hill Graham Field Regulator Modules. The module was produced in two basic configurations: Single Field for applications such as Rotary table, Top Drive or single motor Mud Pumps or Drawworks, and Dual Field for dual motor Mud Pumps and Drawworks. We test the following:
- Field Current Regulation
- Field Current Settings and Selection
- Field Weakening
- External Field Trim
- Firing Circuits
- Field Loss Protection
- Overcurrent Protection
- Mud Pump Load Balancing
- Unbalance Protection
- Annunciators
- Metering
Each FR Module undergoes a rigorous set tests and is awarded a test certificate which details results of tests and records key measurements. A detailed description of faults found and their possible consequences is included wehere applicable.
AutoSync AC Module Testing
In the early 1980's Ross Hill developed the ACII Module, also called the AutoSync Module. The AautoSync Module was an ambitious attempt to incorporate more features and functionality into the AC Module, which included building the Exciter PCB into the module, improved load sharing, more comprehensive fault annunciation and metering, and synchronisation to the main bus.
This means that the AutoSync Module is considerably more complex than the standard AC Module and consequently difficult to troubleshoot and repair.
We use our standard AC Simulator with an adapter interface to conduct a comprehensive set of tests and calibrations to return your AutoSync Modules to full health, including:
 AutoSync Adapter |
Each AutoSync Module undergoes a rigorous set tests and is awarded a test certificate which details results of tests and records key measurements. A detailed description of faults found and their possible consequences is included where applicable. |