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Ross Hill / NOV

Our deepest specialty: SCR drilling control for Ross Hill, Hill Hayes, and NOV systems.

Ross Hill Controls and the Hill Hayes SCR designs (now NOV) powered a generation of drilling rigs. Edmundson Industrial sources the control modules, SCR bay parts, and power that keep those systems running, and we cross-reference Ross Hill and NOV numbering both directions.

Independent sourcing, not an authorized distributor. Ross Hill and NOV are trademarks of their respective owners, used here for reference only. We supply new old stock, surplus, used-tested, and sourced-to-order, with condition disclosed before sale.

Featured Ross Hill and NOV parts

Ross Hill AC Control Module

AC firing and protection module.
0521-2500-14
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Ross Hill DC Module

DC regulation module, the matched companion.
0522-2400-23 · NOV 6415-2400-21
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SCR Bay Components

Contactors, blowers, meters, instrumentation.
6702ED584
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Drilling Power Modules

SCR power modules and DC drive stacks.
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P/NEI RefDescription
0521-2500-14AC Control Module (SCR)
0522-2400-23DC Control Module
0522-2400-21DC Module = NOV 6415-2400-21

NOV largely carried Ross Hill numbering forward; certain DC modules use distinct 6415- numbers.

More in the drilling specialty: Drilling Rig Electrical, the Ross Hill / NOV cross-reference, and SCR & DC Drive Systems.

How do we quote a Ross Hill / NOV part?

  1. Send the Ross Hill or NOV part number (for example 0521-2500-14), or a photo of the module label.
  2. We confirm the AC or DC module type and revision, and cross-reference Ross Hill and NOV numbering both directions.
  3. We quote condition, price, and lead time: new-surplus, used-tested, or sourced-to-order, timing confirmed with the request.

Condition & sourcing

We supply Ross Hill and NOV drilling parts new-surplus, used-tested, and sourced-to-order, with condition disclosed before sale and photos on request. We are an independent surplus and sourcing company, not an authorized distributor.

FAQ

Are Ross Hill and NOV parts interchangeable?
Often yes. NOV kept most Ross Hill numbering, with the DC modules the main exception, where distinct 6415- numbers appear. We verify before quoting.
Can you supply obsolete Ross Hill modules?
Yes. New old stock, surplus, used-tested, and cross-referenced replacements. Condition is disclosed before sale.
What Ross Hill drilling parts do you source?
AC and DC control modules, SCR bay components (contactors, blowers, meters, instrumentation), and drilling power modules and DC drive stacks. Send the part number or a photo of the label.
Are you an authorized Ross Hill or NOV distributor?
No. Edmundson Industrial is an independent surplus and sourcing company, not an authorized Ross Hill or NOV distributor. We supply new old stock, surplus, used-tested, and sourced-to-order with condition disclosed before sale.

Request a Quote

Request a Quote

or send the part number to sales@edmundsonindustrial.com · (832) 975-8827 · Houston, TX. Response timing is confirmed with the request.

Related

Rig down? Send us the Ross Hill or NOV part number.

Condition disclosed before sale. Response timing is confirmed with the request.

Request a Quote