Drilling Rig Electrical · DC control
Ross Hill 0522-2400-00 — DC Control Module, Shunt Type
The shunt-type DC control module in the Ross Hill / NOV 0522-2400 family — and the 2400 / 2500 numbering discrepancy that hides it from searches.
The shunt-type DC control module in the Ross Hill / NOV 0522-2400 family — and the 2400 / 2500 numbering discrepancy that hides it from searches.
Independent sourcing, not an authorized distributor. Ross Hill, NOV, and other manufacturer names and part numbers are used for reference only. Supplied as new-surplus, used-tested, or reconditioned, with condition disclosed before sale.
| Part number | 0522-2400-00 |
|---|---|
| Manufacturer | Ross Hill / NOV |
| EI reference | EI-0522-2400-00 |
| System | Ross Hill / Hill Hayes / NOV SCR drilling |
| Module type | DC control — shunt type |
| Known numbering issue | Also recorded as 0522-2500-00 in some records |
| Condition | New-surplus, used-tested, reconditioned |
0522-2400-00 · 0522240000 · 0522-2500-00 · 0522250000 · 0522-2400 · 2400-00 · Ross Hill DC control module shunt · RHCC DC module · EI-0522-2400-00
This part is worth a page mostly because of a documented inconsistency. Records for this item are known to disagree in the middle number group: some carry 2500 where the OEM number reads 2400. It is the same item.
The practical effect is that a search against one form returns nothing, and a buyer concludes the part is unobtainable when it is simply indexed differently. If you have hit that wall, try both forms — and when you contact us, send the number exactly as it appears on your board rather than the number you were told to look for.
The DC control modules regulate the DC drilling motors in a Ross Hill SCR house, holding speed and current against the driller's setpoint by controlling SCR firing. This variant is recorded as the shunt type, matched to a shunt-wound motor field.
Shunt and series fields behave differently under load, which is why the family splits into variants at all. A board that fits the rack is not evidence that it matches your field configuration.
| Number | What our records describe | Relationship |
|---|---|---|
| 0522-2400-00 | DC control module, shunt type. | this page |
| 0522-2400-27 | DC control module, series type, with 1K ohm resistor. | Different field configuration |
| 0522-2400-23 | DC control module, regulation. Sets SCR phase angle from the driller's handwheel setpoint. | Different variant |
| 0522-2400-21 | DC control module, standard. NOV 6415-2400-21. | Different variant |
We verify the exact number against the physical unit before quoting and send photos of the label on the unit being offered. Given the known 2400 / 2500 discrepancy on this item, a photo of the actual label is more useful here than usual.
These are the details that let us identify the right unit instead of guessing at it.
Supplied as new-surplus (unused, from the secondary market), used-tested, or reconditioned, with condition disclosed before sale and photos on request. Availability on legacy Ross Hill and NOV equipment changes constantly — send the number and we will tell you what we can actually find.
Condition always disclosed before sale. Photos on request. Same-day response on most requests.
Condition disclosed before sale. Same-day response on most requests.