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. Surplus, replacement, and cross-referenced.
The Ross Hill DC module is the DC-side control board in the SCR drive, handling regulation, feedback, and protection for the DC power that drives the rig. It's the companion to the AC module, and on most systems both are required. These boards are obsolete and hard to find; we source new old stock, surplus, and cross-referenced replacements.
| OEM / Common P/N | EI Reference | Description |
|---|---|---|
| 0522-2400-23 | EI-0522-2400-23 | Ross Hill / NOV DC Control Module (SCR) |
| 0522-2400-21 | EI-0522-2400-21 | DC Module, cross-references to NOV 6415-2400-21 |
| 0522-2400 | EI-0522-2400 | DC Control / Regulator Module, Ross Hill SCR series |
Confirmed cross-reference: Ross Hill 0522-2400-21 = NOV 6415-2400-21. Verify the exact part and revision against the nameplate before we quote.
NOV kept most original Ross Hill numbering when it acquired the line, but the DC control modules are the main exception. Some carry distinct NOV 6415- numbers, which is why 0522-2400-21 maps to NOV 6415-2400-21. We cross-reference both directions and confirm the pairing before quoting so you don't end up with the wrong board.
Send 0522-2400-23 (or your number) and we'll tell you what we can find.