Eaton CB3033B120480KGRAX Pringle bolted switch - UL Listed
Part Number: CB3033B120480KGRAX
Quick Summary
Eaton CB3033B120480KGRAX bolted pressure contact switch provides rapid fault protection in industrial power distribution equipment. For engineers facing unpredictable outages, reliable protection that trips quickly minimizes downtime and protects expensive motors and circuits. UL Listed certification ensures safety compliance across United States installations, while NEMA-rated enclosures broaden service environments. This model complements Eaton switching devices, offering ground fault and auxiliary options for scalable, compliant protection in 480V systems. Its 3000A amperage rating, three-pole design, and 480V system compatibility address heavy-duty industrial needs while keeping installation straightforward. With optional ground fault relay and blown fuse detection, you gain proactive protection and simplified maintenance planning across plant sites.
Product Information
Extended Description
CB3033B120480KGRAX Eaton: Eaton pringle bolted pressure contact switch,Interlock, single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),3000A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB3033B120480KGRAX
UPC
782116951482
Product Length/Depth
22.5 in
Product Height
32 in
Product Width
40 in
Product Weight
430 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Catalog Notes
OPTIONAL Ground Fault Relay, Blown Fuse Detection, Single Phase Protection, Kirk Provisions, Auxiliary Contact Provisions, AVAILABLE.
Feed type
Bottom
Fuse configuration
Bottom feed
Ground
Ground fault with control power transformer
Number Of Poles
Three-pole
Number of wires
3
Switch type
Electrical trip with charge-before-close mechanism
Type
Pringle bolted pressure contact switch
Amperage Rating
3000A
Control voltage
120 V
NEMA rating
NEMA 1, NEMA 3R, NEMA 4, NEMA 12
Protection
Fusible
System voltage
480 V
Voltage - max
480 V
Voltage rating
480 V
Special features
Interlock, single-phase voltage relay with capacitor trip device (SPVR), BFD with no lights (trips switch)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB3033B120480KGRAX
High amperage and voltage ratings enable the CB3033B120480KGRAX to handle 3000A at 480V for three-pole circuits, reducing the need for parallel devices in large motor feeders and switchgear. This design minimizes equipment footprint and simplifies installation with bottom feed and fusible protection, delivering cost savings and easier service access in industrial power distribution environments. The interlock and SPVR with capacitor trip device enhances trip coordination and safety, preventing premature closure and safeguarding personnel during fault events. Ground fault capability and optional ground fault relay or blown fuse detection improve fault detection, reducing unplanned outages and enabling proactive maintenance planning across the facility. UL Listed certification supports global compliance, while NEMA ratings 1, 3R, 4 and 12 provide robust enclosure protection for varied plant environments. The bottom-feed, Kirk provisions, auxiliary contact provisions, and compatibility with optional accessories streamline retrofits and future upgrades in existing switchgear, reducing installation time and lifecycle costs. Built to endure, the unit’s substantial construction supports rugged operation with predictable maintenance cycles, enhancing overall plant reliability and safety.
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FAQs
CB3033B120480KGRAX is designed for use with NEMA-rated enclosures including NEMA 1, NEMA 3R, NEMA 4, and NEMA 12. The bottom feed and fusible configuration support secure installation in industrial panels, switchgear cabinets, and outdoor enclosures, while UL Listed certification ensures compliance across typical US installations.
The unit supports a 3000A amperage rating with a 480V system voltage and a 120V control voltage. It is a three-pole, three-wire switch with fusible protection and a bottom feed configuration, suitable for large motor feeders and high-load distribution in industrial facilities.
Yes. The catalog notes include optional Ground Fault Relay and ground fault protection features. When paired with a control transformer and protective relays, it provides enhanced fault detection and safer operation in power distribution panels and switchgear environments.
Key differentiators include the Interlock feature and the SPVR capacitor trip device, which improve trip coordination and prevent unwanted closures. Optional features such as Blown Fuse Detection and Auxiliary Contacts (Kirk provisions) make retrofits easier and extend protection to single-phase paths within multifunction switchgear.
Eaton offers a warranty under policy 25-000: one year from installation or eighteen months from shipment, whichever comes first. Support includes UL certification assurance, compatibility guidance for optional accessories, and access to Eaton switching devices documentation and datasheets for installation and maintenance planning.