Ross Hill 0100-1000-04: DWDB Grid Resistor Assembly
The drawworks dynamic braking grid resistor assembly in a Ross Hill / NOV system: where braking energy is dissipated as heat.
Independent supplier. RHCC 0100-1000-04 is identified from the installed number. Manufacturer and trademark names are used for reference only, and condition is disclosed before sale.
| Part number | 0100-1000-04 |
|---|---|
| System | Ross Hill / Hill Hayes / NOV SCR drilling |
| Function | Dynamic braking |
| Condition | New-surplus, used-tested, reconditioned |
| Also searched as | 0100-1000 · 0100-1000-04 · 0100100004 · Ross Hill · NOV · Hill Hayes |
What it does
During dynamic braking the drilling motor acts as a generator and that energy has to go somewhere. The grid resistor bank dissipates it as heat. These assemblies live hard: thermal cycling, vibration, and weather. Failures are usually open elements, cracked grids, or degraded connections rather than anything subtle.
Symptoms that point here
| What you are seeing | What it usually indicates |
|---|---|
| Reduced or absent dynamic braking capability | Open element in the bank |
| Visible cracked, burned, or distorted grid elements | Inspect the full bank, not just the visible face |
| Braking effort falls off as the assembly heats | Partially degraded elements |
| Discolored or loose terminations at the bank | Connection resistance: a common and repairable cause |
| Weak or absent drawworks dynamic braking | Grid resistor assembly: a different item from the NOV 10509209-001 resistor bank; send the number on your unit |
Confirm the installed unit
For 0100-1000-04, send the complete dash number and a clear nameplate or board-label photo. The quoted unit is matched to the supplied identifier before condition and lead time are confirmed.
Condition and sourcing
RHCC 0100-1000-04 is quoted only after current availability, condition, and lead time are confirmed. Any offered unit is identified as new-surplus, used-tested, or reconditioned before sale.
If the observed failure does not line up with RHCC 0100-1000-04, use the SCR Drive Fault Finder to narrow the subsystem before requesting a part.
Identification checkpoint
For RHCC 0100-1000-04, confirm function: Dynamic braking; also searched as: 0100-1000 · 0100-1000-04 · 0100100004 · Ross Hill · NOV · Hill Hayes. Use the installed label and complete suffix before treating another item as equivalent.
FAQ
What is the DWDB grid resistor assembly?
Can grid banks be repaired instead of replaced?
Do you handle the NOV resistor bank number as well?
Availability & Quote
For RHCC 0100-1000-04, condition is disclosed before sale. Item photographs are supplied with an actual offer.
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