Allis-Chalmers SDO Full Kit
A precision replacement kit for Allis-Chalmers SDO oil circuit breakers (OCBs), machined to OEM dimensional specifications.
- OEMAllis-Chalmers
- Model / SeriesSDO
- Part typeKit
- EquipmentOil circuit breakers (OCBs)
- AvailabilityBuilt to order / lead time confirmed at quote
- Internal ref.BR-AC-SDO-FULL-KIT
Overview
Full interrupter kit for the Allis-Chalmers SDO oil circuit breaker, stationary contact mount, arcing nozzles (upper and lower), washers, bottom plate, stationary contact, moving contact rod, retaining screw and ring, spring, interrupter shell. Kit sold as a set of 6 assembled interrupters.
About the Allis-Chalmers SDO Oil Circuit Breaker
The Allis-Chalmers SDO is an oil circuit breaker used in substation fault interruption applications. Its interrupter assembly includes a stationary contact mount, upper arcing nozzle, offset rod, retaining ring, bottom plate, interrupter shell, and spring. The interrupter components wear through interrupting duty and require replacement at overhaul. Southern Switch machines replacement components and interrupter kits for the Allis-Chalmers SDO.
Why replace worn OCB contacts
Pitted or eroded oil-circuit-breaker contacts increase resistance and weaken interruption. Precision replacements restore dependable making and breaking under load.
Stock, lead time & reverse engineering
Lead time is confirmed at quote; discontinued or hard-to-find parts are reverse-engineered from a sample, a drawing, or a model number. Based in Palm Harbor, FL, Southern Switch & Contacts manufactures and ships replacement parts to utilities nationwide, and has served the industry since 1982.
Each part below corresponds to a labeled component on the kit drawing. Click View to open the part’s standalone page, or + Quote to add it to your quote without leaving this page.
What’s in the kit
Every part below ships in the kit, listed with its OEM number and the quantity per kit. Need only certain parts or quantities? Tell us and we will tailor the quote.
| Ref | Part | Qty | Action |
|---|---|---|---|
| A | Stationary Contact Mount OCBACSD006 | 6 | |
| B | Lower Arcing Nozzle OCBACSD004 | 6 | |
| C | Upper Arcing Nozzle (OEM 72-111-997-501) OCBACSD007 | 6 | |
| D | Large Hole Washer OCBACSD008 | 24 | |
| E | Small Hole Washer OCBACSD003 | 12 | |
| F | Bottom Plate OCBACSD009 | 6 | |
| G | Stationary Contact (OEM 72-116-530-06) OCBACSD002 | 36 | |
| H | Moving Contact Rod (OEM 72-210-492-502) OCBACSD001 | 6 | |
| I | Retaining Screw OCBACSD010 | 36 | |
| J | Spring OCBACSD011 | 36 | |
| K | Retaining Ring OCBACSD012 | 6 | |
| L | Interrupter Shell OCBACSD013 | 6 |
Worn but not scrap? Send us your used contacts. We recondition them to OEM dimension, or machine a new set from your sample, and return them tested and documented. Often cheaper and faster than buying new.
Send the model number, asset tag, or just a description, we’ll reply with pricing and lead time within one business day.
Net 30 with an accepted PO, no credit application required. How we do business →