Ross Hill DC Module
The DC regulation module in Ross Hill and NOV SCR drilling systems: part 0522-2400-23, with 0522-2400-21 cross-referencing to NOV 6415-2400-21.
The 0522-2400-23 is the DC control module in Ross Hill and NOV SCR drilling systems: it sets the SCR phase angle from the driller's handwheel setpoint and runs the current and speed regulation loop for stepless DC motor control. The related 0522-2400-21 cross-references to NOV 6415-2400-21. Send the number and we'll tell you what we can find.
Status
| Part number | 0522-2400-23 |
| Related number | 0522-2400-21 = NOV 6415-2400-21 |
| System | Ross Hill / Hill Hayes / NOV SCR drilling |
| Module type | DC control: regulation |
| Function | Sets SCR phase angle from the handwheel setpoint; current / speed regulation for stepless 0–750 V DC motor control |
| Pairs with | AC control module 0521-2500-14 |
| Condition | New old stock, surplus, used-tested, reconditioned |
The DC modules are where NOV used distinct numbers; verify 0522-2400-21 versus 6415-2400-21 against the label.
The DC drilling motor it regulates
| Motor | GE752 high-torque DC drilling motor (industry standard) |
| Rated voltage | 750 V DC |
| Rated current | about 1185 A |
| Power | about 1130 HP (200–1200 kW range) |
| Construction | 12-pole, brush-type DC |
| Base speed | about 1040 RPM |
| Cooling | Separately-driven blower (about 2800 SCFM) |
Typical GE752 ratings shown for reference; verify against the motor nameplate.
The 0522-2400 DC control family
Several dash variants exist in this family and they are not documented as interchangeable. Each now has its own page where we have enough to say.
| Number | Part description | Relationship |
|---|---|---|
| 0522-2400-23 | DC control module, regulation. Sets SCR phase angle from the driller's handwheel setpoint. | this page |
| 0522-2400-21 | DC control module, standard. Cross-references to NOV 6415-2400-21: see the 0522-2400-21 page. | Different variant |
| 0522-2400-27 | DC control module, series type, with 1K ohm resistor: see the 0522-2400-27 page. | Different field configuration |
| 0522-2400-00 | DC control module, shunt type; also recorded as 0522-2500-00: see the 0522-2400-00 page. | Different field configuration |
| 0521-2400-21 | Exact-match identifier that requires a physical board label; no interchange is assigned. | Nameplate confirmation required |
Series and shunt refer to how the DC motor field is wound, which changes how the drive behaves under load. That is a real electrical difference, not a cataloguing one. A board that drops into the rack is not evidence that it is the right board: confirm the dash number.
Condition and sourcing
RHCC 0522-2400-23 is quoted only after current availability, condition, and lead time are confirmed. Any offered unit is identified as new-surplus, used-tested, or reconditioned before sale.
If the observed failure does not line up with RHCC 0522-2400-23, use the SCR Drive Fault Finder to narrow the subsystem before requesting a part.
Identification checkpoint
For RHCC 0522-2400-23, confirm function: Sets SCR phase angle from the handwheel setpoint; current / speed regulation for stepless 0–750 V DC motor control; related number: 0522-2400-21 = NOV 6415-2400-21; module type: DC control: regulation. Use the installed label and complete suffix before treating another item as equivalent.
FAQ
What is the Ross Hill DC module?
What is the part number for the Ross Hill DC module?
Is the Ross Hill DC module the same as the NOV DC module?
Can you supply a replacement?
Request a Quote
or send the part number to sales@edmundsonindustrial.com · (832) 975-8827 · Houston, TX. Response timing is confirmed with the request.
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