Eaton CB3033T120480KGRAX7 Pringle bolted switch - UL
Part Number: CB3033T120480KGRAX7
Quick Summary
Eaton CB3033T120480KGRAX7 bolted pressure contact switch is designed to deliver reliable high-current control in industrial power panels. It supports a 3000 A amperage rating with a 2NO-2NC contact configuration, top-feed and fusible protection for rugged environments. This unit integrates an interlock with a capacitor trip device (SPVR) and ballast-free operation, delivering precise, charge-before-close performance. The product carries UL Listed certification and is compatible with multiple NEMA enclosures, including NEMA 1, 3R, 4, and 12, for versatile installation. For engineers and procurement teams, the combination of high-current capability and configurable protection reduces panel downtime and simplifies maintenance through clear wiring and compatibility with optional ground fault relays, auxiliary contacts, Kirk provisions, and auxiliary provisions.
Product Information
Extended Description
CB3033T120480KGRAX7 Eaton: Eaton pringle bolted pressure contact switch,Interlock, single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),3000A,2NO-2NC,120V,Top feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB3033T120480KGRAX7
UPC
782116950836
Product Length/Depth
22.5 in
Product Height
28 in
Product Width
40 in
Product Weight
390 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.
Contact configuration
2 NO-2 NC
Feed type
Top
Fuse configuration
Top 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 - CB3033T120480KGRAX7
Feature → Business Impact → Application: Three-pole with 2NO-2NC contact configuration provides versatile control options for feeders, starters, and interlock circuits, reducing the need for additional devices and enabling compact panel layouts. This translates to lower installation costs, faster commissioning, and greater fault-tolerant operation in demanding environments. Application-wise, it’s ideal for motor control centers and switchgear where reliability and wiring efficiency matter. Feature → Business Impact → Application: Top feed and fusible configuration simplifies wiring and upstream protection, improving site safety and streamlining maintenance. With fewer field connections, electricians save time during installation and when performing preventive maintenance in harsh environments. Application: Power distribution panels and safety interlock assemblies benefit from consistent, predictable protection schemes. Feature → Business Impact → Application: Interlock capability and capacitor trip device (SPVR) deliver charge-before-close protection with reduced nuisance trips, supporting safer starts and protecting downstream equipment. This is especially valuable in critical loads and high-inertia motors. Application: Safety interlocks in MCCs and process lines. Feature → Business Impact → Application: Ground fault relay options and auxiliary provisions (Kirk provisions, auxiliary contacts) offer expandability for modern protection schemes, enabling remote monitoring and integration with plant-wide safety systems. Application: retrofit projects and new builds seeking scalable protection ecosystems. Feature → Business Impact → Application: NEMA 1, 3R, 4, 12 compatibility ensures durable enclosure protection across indoor, outdoor, and wash-down environments, reducing enclosure substitutions and inventory variety. Application: Panel housings in manufacturing, food & beverage, or chemical processing environments.
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FAQs
When installing CB3033T120480KGRAX7 in top-feed configurations, ensure the feeder conductors align with the top-entry ports and that the fusible protection is correctly rated for the 480 V system. Verify 3-pole, 3-wire wiring and confirm 2NO-2NC contact arrangement matches the control circuit design. Use Kirk provisions and auxiliary contact provisions as needed to integrate with plant safety interlocks. Follow UL Listed installation guidelines for enclosure integrity and safe clearance distances.
The CB3033T120480KGRAX7 offers a 3000 A amperage rating, 480 V system voltage, and 120 V control voltage, paired with a 2NO-2NC contact set across three poles. This combination supports heavy-duty motor control and safety interlocks while enabling compact, centralized protection within switchgear. The SPVR capacitor trip device provides reliable charge-before-close behavior, reducing inrush-related faults and improving overall protection reliability.
Yes. The CB3033T120480KGRAX7 carries UL Listed certification, aligning it with recognized electrical safety standards for industrial equipment. Its NEMA compatibility (1, 3R, 4, 12) supports installation in a wide range of environments, from indoor control panels to rugged outdoor enclosures. Optional features like ground fault relays and auxiliary provisions further support compliance with advanced safety interlock schemes used in modern facilities.
Grounding and auxiliary configurations are supported via optional provisions, including ground fault relay options, auxiliary contacts, and Kirk provisions. The 2NO-2NC configuration provides flexibility for signaling and interlocking schemes, while the ground fault functionality enhances protection for control power transformers and associated circuitry. This makes the CB3033T120480KGRAX7 suitable for integrated plant-wide safety and monitoring systems.
Eaton provides a warranty aligned with policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, follow UL Listed maintenance practices, inspect the SPVR and fuse connections during preventive maintenance, verify proper grounding, and confirm connector integrity after installation. Optional accessories should be tested periodically to ensure proper auxiliary contact operation and interlock reliability in safety-critical applications.