Eaton CB1633T120480GRAO Bolted Pressure Switch - UL Listed

Part Number: CB1633T120480GRAO
Manufacturer
Eaton
Part number
CB1633T120480GRAO

Quick Summary

Eaton pringle bolted pressure contact switch provides reliable single-phase protection for industrial power distribution panels. In demanding manufacturing environments, mis-trips or missed faults can drive downtime and safety concerns. The unit carries UL Listed certification and supports wide enclosure compatibility with NEMA 1, 3R, 4 and 12 ratings, helping you meet dimensional and ingress expectations on the floor. Optional features such as Ground Fault Relay and Blown Fuse Detection extend fault visibility without complicating installation. With top-feed wiring and a 120 V control voltage on a 480 V system, it integrates smoothly into existing control architectures, delivering robust protection while reducing panel space consumption and maintenance overhead.

Product Information

Extended Description

CB1633T120480GRAO Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with three off 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
CB1633T120480GRAO
UPC
782116956937
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 off lights (does not trip)
High-capacity performance: The CB1633T120480GRAO delivers 1600A amperage rating and supports a 480V system with a 120V control voltage in a three-pole, three-wire configuration. This combination reduces auxiliary switchgear and simplifies wiring in large motor feeders. In practice, fewer components means lower assembly time and a smaller panel footprint, translating to meaningful capital cost savings during initial installations and future upgrades. Capacitor-trip device SPVR: The bolted pressure contact switch includes a capacitor trip mechanism that improves trip accuracy for single-phase protection. The clear trip logic helps coordination with upstream protection and minimizes nuisance trips that disrupt production lines. Integrators appreciate predictable performance in load-center environments, where harmonics and surge events can otherwise trigger unwanted trips. Optional protective features: Ground Fault Relay and Blown Fuse Detection are catalog notes that can be added without redesigning controls. When enabled, these functions provide early fault indication and faster maintenance response, reducing unplanned downtime. This aligns with preventive maintenance programs and supports safer commissioning in new builds and retrofits. NEMA-rated enclosure compatibility: The unit supports NEMA 1, 3R, 4, and 12 environments, enabling use in common industrial settings from indoors to damp or wash-down areas. Top feed and top-fuse configuration simplify panel design and field wiring, allowing quick installation in existing switchgear without re-routing feeders. Reliability and lifecycle: UL Listed certification and robust pringle bolted design contribute to long service life under thermal and electrical stress. The 180 lb weight indicates a substantial enclosure, reinforcing mechanical robustness in demanding environments. The combination of protection, duty rating, and warranty helps meet uptime targets and total cost of ownership goals.

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FAQs

Install the CB1633T120480GRAO as a three-pole, three-wire device with top feed and fusible protection. Connect the 120 V control circuit to the control voltage terminals while feeding 480 V to the load side. Ensure enclosure ratings align with the installation environment (NEMA 1, 3R, 4, or 12). Proper torque and secure grounding are essential for reliable operation.
The capacitor trip device is designed to coordinate single-phase protection by providing a controlled, capacitor-assisted trip sequence. This improves selectivity, reduces nuisance trips, and enhances safety by ensuring faults clear quickly without impacting adjoining circuits. In practice, SPVR helps protect critical loads while maintaining smooth startup and operation for surrounding equipment.
Yes, with a 1600A rating and 480V system voltage, CB1633T120480GRAO is well-suited for high-inrush motor feeders and heavy-duty applications. The device’s fusible protection and robust enclosure support long-term reliability in demanding environments. Always verify coordination with upstream protective devices to ensure proper fault clearance and minimum downtime during startup transients.
This switch carries UL Listed certification for safety and reliability. It is compatible with multiple NEMA enclosure ratings including NEMA 1, NEMA 3R, NEMA 4, and NEMA 12, enabling installation across a range of indoor industrial environments. Optional features align with standard compliance practices for controlled electrical protection in industrial facilities.
Adding Ground Fault Relay and Blown Fuse Detection provides early fault visibility and targeted fault isolation, reducing unplanned downtime and speeding maintenance response. This supports preventive maintenance programs, improves safety, and can lower total cost of ownership by limiting unwarranted shutdowns and enabling quicker service actions during fault conditions.