Eaton CB1633B120480GRA Pringle bolted switch - UL Listed
Part Number: CB1633B120480GRA
Quick Summary
CB1633B120480GRA is a three-pole bolted pressure contact switch designed for heavy-duty motor protection in industrial power systems. This Eaton device helps engineers prevent unplanned downtime by delivering reliable trip and protection in high-current feeders. The unit features a capacitor trip device (SPVR) and a ground-fault option with control power transformer, improving fault visibility and selective tripping. It is UL Listed and compatible with a range of enclosures (NEMA 1, 3R, 4, 12), supporting safe operation in harsh environments. For procurement and maintenance teams, its bottom-feed configuration, fuse-compatible design, and optional accessories (auxiliary contact provisions, Kirk provisions) streamline installation and service, reducing lifecycle costs.
Product Information
Extended Description
CB1633B120480GRA Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with three on lights (does not trip),1600A,120V,Bottom feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633B120480GRA
UPC
782116958467
Product Length/Depth
16 in
Product Height
32 in
Product Width
24 in
Product Weight
200 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
1600A
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
Single-phase voltage relay with capacitor trip device (SPVR), BFD with three normally on lights (does not trip)
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633B120480GRA
Feature: High current protection up to 1600A at 480V. Business Impact: Enables reliable protection for large motors and feeders, reducing risk of catastrophic equipment failure and unplanned downtime. Application: Heavy-duty motor feeders, which demand robust protection and fast fault clearing. Feature: SPVR capacitor trip device with three on-lights (BFD). Business Impact: Improves fault visibility and coordination, enabling quick diagnostics and safer maintenance windows. Application: Switchgear where precise trip timing and clear status indication are critical. Feature: Bottom feed fuse configuration. Business Impact: Simplifies installation in tight enclosures and reduces wiring errors, speeding up commissioning. Application: Compact switchgear assemblies and retrofit projects. Feature: Ground fault option with control power transformer. Business Impact: Enhances personnel safety and provides selective protection in systems with sensitive equipment. Application: Industrial power distribution panels with ground fault monitoring. Feature: NEMA 1, 3R, 4, 12 compatible. Business Impact: broad environmental resilience, enabling installation across factories, outdoors, and harsh wash-down areas. Application: Process plants, water treatment, metal fabrication, and mining facilities. Feature: Three-pole, three-wire configuration. Business Impact: Enables balanced three-phase protection with straightforward integration into existing electrical architectures. Application: Main feeders and machine power distribution where reliable trip logic is essential. Feature: Fusible protection with auxiliary and Kirk provisions available. Business Impact: Facilitates compliance with safety standards and enables future expansion without replacing the base switch. Application: Customizable protection schemes in retrofit or new-build projects.
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FAQs
CB1633B120480GRA is designed for three-pole, bottom-fed installations. Begin by mounting the unit in a suitable enclosure, ensuring space for the bottom-fed conductors and the control power transformer if ground-fault options are used. Connect the three lines to the three poles, install the fusible links per the rated system voltage, and verify SPVR wiring and auxiliary provisions as recommended in the Eaton specification sheet. Follow all applicable safety standards during commissioning.
Key ratings include a 1600A amperage rating and 480V system voltage, with 120V control voltage. The switch supports fusible protection and offers a capacitor trip device (SPVR) with an optional ground-fault relay. It is rated for NEMA 1, 3R, 4, and 12 enclosures, making it suitable for demanding industrial environments and providing robust motor protection and reliable fault handling.
Yes. The CB1633B120480GRA is built for heavy-duty motor protection in manufacturing and processing lines. Its three-pole design, SPVR trip device, and fusible protection support reliable start-up, safe shutdown, and fault isolation. The bottom-feed configuration aids compact installations, while optional ground-fault features improve personnel safety and system reliability in continuous-operation environments.
The CB1633B120480GRA is UL Listed, providing recognized safety compliance. It also supports a broad range of enclosures through its NEMA ratings: NEMA 1, 3R, 4, and 12. These certifications and ratings help ensure safe operation in diverse industrial environments and ease integration with existing electrical codes.
The product carries Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever occurs first. Its modular features—such as optional ground fault protection, auxiliary contacts, and Kirk provisions—facilitate upgrades without full replacement. These attributes help reduce downtime, simplify spares planning, and lower lifecycle costs for capital-intensive switchgear projects.