Description
The Ansaldo Ross Hill 0000-9454-00 is a specialized Dual Reversing Balancing Field Controller Card, predominantly used in legacy DC drive systems for oil drilling rigs (specifically those utilizing the Ross Hill SCR – Silicon Controlled Rectifier – systems). This card is responsible for regulating the excitation field of DC motors. By managing the field current in both directions, it enables the motor to reverse direction smoothly and ensures that the magnetic field is balanced during operation. It is a critical component for maintaining torque control and motor stability during heavy-duty drilling applications.
Key Technical Specifications
| Parameter | Value/Description |
| Part Number | 0000-9454-00 |
| Series | Ansaldo Ross Hill SCR Drive Control |
| Function | Dual-path field excitation and reversal control |
| Control Logic | Analog regulator loop for field current |
| Compatibility | DC Traction Motors (Drilling Rig applications) |
| Operating Voltage | 24V/48V DC Control Logic; High Voltage Power Stage |
| Adjustment | Field current balance and reversal timing pots |
| Mounting | Standard SCR Control Rack/Chassis |
| Environment | Industrial rig floor control environment |
Recommended Related Models
These components are frequently serviced or replaced in conjunction with the field controller in Ross Hill SCR drive cabinets:
- 0000-9452-00: SCR Gate Driver Card
- 0000-9453-00: Field Regulator Module (Single phase)
- 0000-9455-00: Speed Reference/Command Card
- 0000-9456-00: Current Limit/Feedback Card
- 0000-9460-00: SCR Power Module (Semiconductor assembly)
- 0000-9470-00: DC Bus Interface Module
- SCR-600: Thyristor Bridge Assembly
- 1200-2445: Bridge Interface/Communication Card
- 0000-8800-XX: Logic/Sequencing PCB series
- 0000-9500-XX: Cooling Fan/Thermal Protection Module
Important Technical Note: The 0000-9454-00 relies on precise Current Balance adjustments. If the dual fields are not perfectly balanced, the DC motor may experience erratic torque, uneven heating, or excessive brush sparking during reversal. When replacing this card, you must calibrate the “Balance” and “Gain” potentiometers while monitoring the field current with an oscilloscope or high-precision DC clamp meter to ensure symmetrical field output in both directions.
