Description
Product Specifications
| Feature | Details |
|---|---|
| Brand | National Oilwell Varco (NOV) / Ross Hill |
| Model Number | 10050155-001 DC CONTROL MODULE |
| System Compatibility | Ross Hill SCR Control Systems |
| Country of Origin | USA |
| Weight | Approx. 1.6 kg |
| Dimensions | 240mm x 160mm x 40mm |
| Input Voltage | 24V DC / 120V AC (Sensing Dependent) |
| Function | SCR Gate Triggering & Motor Speed Regulation |
The NOV Ross Hill 10050155-001 is a specialized DC Control Module designed for the rigorous demands of oil rig SCR (Silicon Controlled Rectifier) systems. It serves as the primary interface for regulating the speed and torque of large DC motors used in drawworks, mud pumps, and rotary tables. By processing throttle signals and providing precise gate pulses to the SCR bridges, this module ensures smooth power conversion and protection against over-current or stall conditions in heavy-duty drilling operations.
Q&A: Product Common Issues & Solutions
Q: What is the most common cause of a “No Output” condition on the 10050155-001? A: This is frequently caused by a failure in the pulse transformer or the loss of the AC synchronization signal. Without a proper phase-lock to the incoming power line, the module cannot safely trigger the SCRs. Check the synchronization fuses on the rack backplane and verify that the module is receiving the reference voltage required for timing.
Q: Why does the DC motor hunt or oscillate at low speeds? A: This “hunting” behavior usually points to an improperly tuned gain or stability potentiometer on the faceplate of the module. Environmental vibration on drilling rigs can occasionally cause these analog adjustments to drift. Re-calibrating the IR compensation and speed loop response according to the Ross Hill technical manual often resolves the instability.
Q: Can this module be interchanged with other NOV DC modules? A: While many Ross Hill modules share a similar form factor, the 10050155-001 has specific component values optimized for DC motor characteristics. Using a module intended for AC control or a different horsepower rating can result in poor motor performance or even catastrophic failure of the SCR bridge due to incorrect timing pulses.
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