Siemens / Allis-Chalmers BZO-121 Kit
A precision replacement kit for Siemens / Allis-Chalmers BZO-121 oil circuit breakers (OCBs), machined to OEM dimensional specifications.
- OEMSiemens / Allis-Chalmers
- Model / SeriesBZO-121
- Part typeKit
- EquipmentOil circuit breakers (OCBs)
- AvailabilityBuilt to order / lead time confirmed at quote
- Internal ref.BR-AC-BZO115-KIT
Overview
Contact kit for the Siemens / Allis-Chalmers BZO-121 oil circuit breaker, stationary contact, arcing nozzle, baffle stack, moving contact, G-10 push rod.
About the Siemens Allis-Chalmers BZO-121 Oil Circuit Breaker
The Siemens Allis-Chalmers BZO-121 is an oil circuit breaker with an interrupter design using a baffle stack assembly, arcing nozzle, G-10 push rod, moving contact, and stationary contact to interrupt fault current in oil. The interrupter components require replacement at the manufacturer's recommended overhaul interval. Southern Switch machines complete kits and individual components for the BZO-121.
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 OCBACBZ002 | 48 | |
| B | Arcing Nozzle Assembly OCBACBZ004 | 12 | |
| C | Baffle Stack Assembly OCBACBZ003 | 6 | |
| D | Moving Contact OCBACBZ001 | 6 | |
| E | G-10 Push Rod OCBACBZ005 | 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.
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