NOV 10509209-001: Dynamic Brake Resistor Bank

The NOV 10509209-001 dynamic brake resistor bank: where braking energy from a drilling drive is dissipated as heat.

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	10509209-001
Manufacturer	NOV
System	Ross Hill / Hill Hayes / NOV SCR drilling
Function	Dynamic braking
Condition	New-surplus, used-tested, reconditioned

Also searched as

10509209-001 · 10509209001 · 10509209 · NOV 10509209-001 · dynamic brake resistor · dynamic braking resistor bank · DB resistor · brake resistor bank · drilling rig brake resistor

What it does

When a drilling drive brakes dynamically, the motor is driven by the load and acts as a generator. That energy has to be dissipated somewhere, and the resistor bank is where it goes: converted to heat and carried away by airflow.

These assemblies live harder than almost anything else on a rig: repeated thermal cycling, vibration, and in many installations direct weather exposure. Failures are usually blunt rather than subtle: open elements, cracked or distorted grids, and degraded terminations.

Review this requirement with EI

Include the reported issue and any existing technician findings with your parts request. Symptoms alone do not identify a replacement. Send the installed part label and equipment details for SCR parts identification & RFQ support.

Full identification matters

Send the complete part number, label photos, equipment details, and any proposed replacement already included in your requirement. EI reviews the identification and configuration with your quote request; a similar number or rating does not establish fit.

Nameplate & revision

We verify the exact dash number and revision against the physical unit before quoting, and we send photos of the plate on the unit being offered. Send a photo of your nameplate, or type out what it reads, and we will match the revision rather than guess at it.

Condition & sourcing

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.

FAQ

What is NOV 10509209-001?

A dynamic brake resistor bank used on drilling rig drives. It dissipates dynamic braking energy as heat.

How is it different from the Ross Hill DWDB grid resistor?

Both handle dynamic braking energy, but they are different assemblies under different part numbers. 0100-1000-04 is the Ross Hill drawworks DWDB grid resistor assembly. Send a photo of your bank if you are not sure which you have.

Can a resistor bank be repaired rather than replaced?

Sometimes. Individual elements and terminations can be serviceable, and loose or corroded connections are a common and fixable cause of reduced braking. Send photos and we will tell you honestly what we see.

What causes these to fail?

Thermal cycling, vibration, and weather. Open elements and degraded terminations are the usual findings.

Do you supply complete banks?

We source complete assemblies as new-surplus, used-tested, and reconditioned, with condition disclosed before sale.

Request a quote

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

Request a quote by emailing sales@edmundsonindustrial.com or by calling (832) 975-8827

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