Eaton CB2533B120480KGRAX Bolted Pressure Contact Switch UL
Part Number: CB2533B120480KGRAX
Quick Summary
Eaton pringle bolted pressure contact switch delivers robust electrical protection for large switchgear and motor feeder applications across manufacturing plants. Maintenance downtime and nuisance trips are common pain points in high‑duty panels, and this unit mitigates them with a capacitor trip device (SPVR) and precise interlock. UL Listed certification supports safety compliance, while built‑in NEMA ratings 1, 3R, 4, and 12 define enclosure suitability for harsh environments. Coupled with bottom feed fuse configuration and three‑pole wiring, it offers straightforward installation and compatibility with standard low‑voltage switching devices from Eaton. This combination translates to reduced downtime, predictable maintenance, and lower life‑cycle costs in industrial automation and power distribution ecosystems.
Product Information
Extended Description
CB2533B120480KGRAX Eaton: Eaton pringle bolted pressure contact switch,Interlock, single-phase relay with capacitor trip device (SPVR), BFD with no lights (trips switch),2500A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB2533B120480KGRAX
UPC
782116952601
Product Length/Depth
17 in
Product Height
32 in
Product Width
28 in
Product Weight
235 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
2500A
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 - CB2533B120480KGRAX
Feature: Interlock with capacitor trip device (SPVR) provides rapid fault clearance and safer sequencing. Business Impact: Reduces outage duration and equipment wear by delivering fast, controlled tripping. Application: Motor control centers and feeder panels requiring reliable single‑phase protection in demanding environments. Feature: Ground fault with control power transformer option enhances personal and equipment protection. Business Impact: Improves safety and fault visibility, helping meet workplace safety standards while minimizing unplanned downtime. Application: Critical power systems where earth leakage protection is mandated or desirable for sensitive loads. Feature: Bottom feed fuse configuration and three‑pole design simplify installation and wiring management. Business Impact: Streamlines field assembly, reduces wiring errors, and supports scalable expansion in existing installations. Application: Large distribution panels and switchgear in manufacturing lines. Feature: NEMA 1, 3R, 4, 12 enclosure ratings and UL Listed certification provide rugged, compliant operation. Business Impact: Enables use in harsh environments and ensures regulatory conformity, lowering risk of non‑compliance penalties. Application: Industrial environments with dust, moisture, and washdown considerations. Feature: Three‑pole, 480 V system voltage with 120 V control voltage and fusible protection. Business Impact: Delivers high current handling with clear separation between line and control circuits, reducing cross‑talk and improving maintenance clarity. Application: Heavy‑duty distribution and large equipment protection in automation facilities. Insight: Integrating this switch with Eaton Switching Devices catalog standards simplifies spare parts management and maintenance planning, delivering predictable service intervals for plant uptime.
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FAQs
CB2533B120480KGRAX is a three‑pole bolted pressure contact switch rated for 480 V, with NEMA 1, 3R, 4, and 12 enclosure compatibility and UL Listing. It supports rugged installation in manufacturing floors, switchgear rooms, and power distribution panels that require reliable protection against faults while withstanding dust, moisture, and routine washdowns.
The SPVR capacitor trip device provides a controlled, pre‑charged trip mechanism that accelerates fault clearing while maintaining safe charge-before-close sequencing. This reduces nuisance trips and shortens recovery times after a protective event, which is especially important for motor feeders and critical loads in automation systems.
Yes, the CB2533B120480KGRAX is UL Listed, confirming compliance with recognized safety standards. It includes fusible protection, ground fault options, and a robust interlock with SPVR, aligning with safety and reliability requirements for industrial power distribution and control circuits.
The switch is rated for 480 V system voltage with a 120 V control circuit and carries a 2500 A amperage rating. It is a three‑pole device with three wires, designed for bottom feed and bottom fuse configuration to simplify installation and integration with existing Eaton equipment.
Plan for bottom feed routing and bus bar accessibility, ensure proper clearance for 235 lb device, and verify enclosure compatibility with NEMA ratings. Use correct torque on connections, observe SPVR interlock clearances, and align with auxiliary contact provisions and Kirk/ground fault retrofit options to maximize reliability and serviceability.