The SCR bridge assembly from a Ross Hill Model 1400 SCR house — the power conversion stage that turns generated AC into controlled DC for the drilling motors.
Independent sourcing, not an authorized distributor. Ross Hill and NOV are trademarks of their respective owners, used here for reference only. We supply this item as new-surplus, used-tested, and reconditioned, with condition disclosed before sale.
| Part number | 0001-6307-70 |
|---|---|
| EI reference | EI-0001-6307-70 |
| Stock code | CA01-6307-70 |
| System | Ross Hill / Hill Hayes / NOV SCR drilling |
| Function | SCR power conversion |
| Condition | New-surplus, used-tested, reconditioned |
| Also searched as | 0001-6307 · 0001-6307-70 · 0001630770 · EI-0001-6307-70 · CA01-6307-70 · Ross Hill · NOV · Hill Hayes |
The bridge is where the actual power conversion happens. Thyristors fire under control of the DC module to produce variable DC for the drilling motors. Because it is a power assembly rather than a control card, failures tend to be visible and consequential: a shorted device, a failed snubber, a blown semiconductor fuse, and the affected drive is down.
Most people arrive at this page from a symptom, not a part number. These are the failure signatures associated with this item. They are starting points for diagnosis, not a substitute for it.
| What you are seeing | What it usually indicates |
|---|---|
| Semiconductor fuse blows repeatedly | Shorted device in the bridge — do not keep replacing fuses |
| Drive delivers reduced or unstable DC output | Device or firing fault on one leg |
| Visible heat damage, discoloration, or smell at the bay | Stop and inspect before re-energizing |
| Drive trips as soon as load is applied | Bridge or firing circuit under load |
Revisions differ across the production life of this equipment, and on some Ross Hill items the dash suffix carries a calibration rather than a revision level. We verify the exact dash number and revision against the physical unit before quoting, and we will send photos of the plate on the unit we are offering.
Send a photo of your nameplate, or type out what it reads, and we will match the revision rather than guess 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 items changes constantly — send the number and we will tell you what we can actually find rather than quote something we cannot deliver.
Condition always disclosed before sale. Photos on request. Same-day response on most requests.
Condition disclosed before sale. Same-day response on most requests.