Eaton CB1633T120480GRA Pringle bolted pressure contact switch - UL Listed
Part Number: CB1633T120480GRA
Quick Summary
Eaton pringle bolted pressure contact switch is a high-capacity single-phase protection device used in electrical distribution and control panels. Engineers often struggle with reliable fault detection and nuisance trips in top-fed, three-pole protection schemes. UL Listed, plus NEMA ratings for 1, 3R, 4 and 12, support durable installation in harsh environments, while the SPVR capacitor trip device and ground-fault options enhance safety. With a 1600A rating and 480V system compatibility, this solution integrates smoothly into existing control architectures, delivering dependable protection and predictable maintenance. It’s particularly well-suited for industrial power distribution panels where safety, reliability, and efficiency drive ROI and uptime.
Product Information
Extended Description
CB1633T120480GRA 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,Top feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633T120480GRA
UPC
782116956968
Product Length/Depth
16 in
Product Height
28 in
Product Width
24 in
Product Weight
180 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
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
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 - CB1633T120480GRA
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Single-phase relay with capacitor trip device (SPVR) for precise overcurrent protection. Benefit: Reduces nuisance trips and improves selectivity, lowering unplanned downtime in motor and load circuits. Application: Suitable for switchgear and distribution panels requiring reliable trip logic while maintaining fast response. Feature: Ground fault protection with transformer integration. Benefit: Enhances personnel safety and Equipment protection by detecting leakage currents and initiating prompt shutdown. Application: Industrial facilities with stringent ground fault requirements in control power circuits. Feature: Top feed fuse configuration and three-pole, three-wire construction. Benefit: Simplified installation and robust fault isolation for large workloads. Application: Top-fed protection schemes in 480V, 3-phase systems. Feature: NEMA rated enclosure (1, 3R, 4, 12) and UL Listed certification. Benefit: Ensures environmental resilience and compliance with safeguarding standards. Application: Harsh or damp environments across industrial plants. Feature: Status indicators with BFD (three normally-on lights). Benefit: Immediate visibility of operation state without opening the panel. Application: Maintenance planning and quick fault diagnostics. Feature: Optional Ground Fault Relay, Blown Fuse Detection, and Auxiliary Contact Provisions. Benefit: Extends protection capabilities and simplifies integration with existing control circuits. Application: Customizable protection schemes for complex automation architectures.
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FAQs
Installation requires a top-feed fuse configuration and a three-pole, three-wire layout to match the 480V system. Ensure proper grounding with the transformer and verify UL Listed compliance. Use the optional auxiliary contacts if you need additional signaling for PLC or HMI integration. Follow Eaton installation guidelines to optimize protection and minimize nuisance trips.
This unit is UL Listed and rated for NEMA 1, 3R, 4, and 12 enclosures, enabling versatile installation in harsh environments. The three-pole, fusible design provides robust protection for high-current circuits up to 1600A at 480V, with a 120V control voltage for reliable control circuitry.
Yes. The assembly supports a ground fault relay option and a single-phase relay with capacitor trip device (SPVR), delivering enhanced fault detection, faster clearing, and safer operation in critical motor and load circuits. Ground fault protection helps reduce shock risk and equipment damage in monitored distribution networks.
Routine maintenance should include checking the trip device operation, inspecting contact surfaces for wear, and testing the ground fault and auxiliary circuits if installed. The SPVR mechanism benefits from periodic electrical tests to confirm capacitor trip functionality, ensuring consistent performance and minimizing unplanned downtime.
The CB1633T120480GRA integrates high-current protection (1600A) with reliable 480V operation and ULListed safety, reducing failure-induced downtime. Its clear status indicators, optional fault-relay features, and durable NEMA-rated enclosure lower maintenance costs, improve uptime, and support regulatory compliance, delivering faster payback in critical power distribution applications.