Eaton CB1633T120480GRAR7 - Pressure Contact Switch UL977
Part Number: CB1633T120480GRAR7
Quick Summary
Eaton CB1633T120480GRAR7 is a bolted pressure contact switch used for high-amp control in industrial power systems. Engineers often struggle with integrating protection timing, ensuring reliable trips, and maintaining safe fault isolation across top-fed, three-pole arrangements. This unit ships UL 977 and supports NEMA 1, 3R, 4 and 12 enclosures, giving flexible installation across harsh environments while meeting common electrical standards. With a capacitor trip device (SPVR) and a BFD with three off lights, it delivers clear fault indication and fast, controlled operation, reducing downtime and maintenance surprises. A 120V control voltage paired with 480V system voltage and a 1600A amperage rating makes it robust for CBC switchgear and larger plant distributions, streamlining wiring and procurement.
Product Information
Extended Description
CB1633T120480GRAR7 Eaton: Eaton pringle bolted pressure contact switch,Single-phase relay with capacitor trip device (SPVR), BFD with three off lights (trips switch),1600A,2NO-2NC,120V,Top feed,Ground fault,480V,Three-pole,Three-wire,Fusible
Product Name
Eaton pringle bolted pressure contact switch
Catalog Number
CB1633T120480GRAR7
UPC
786685618081
Product Length/Depth
16 in
Product Height
28 in
Product Width
24 in
Product Weight
175 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 977
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
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 (trips switch)
Used with
CBC
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Switching Devices
Eaton Specification Sheet - CB1633T120480GRAR7
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: High current capability up to 1600A; Business Impact: Enables reliable control of large loads without oversized switching gear, minimizing the need for extra contactors and reducing total cost of ownership; Application: Suitable for CBC switchgear and distribution panels in industrial facilities. Feature: SPVR capacitor trip device and BFD indicator lights; Business Impact: Delivers fast, controlled protection with clear visual fault feedback, lowering nuisance trips and maintenance time; Application: Critical for safety and uptime in harsh environments. Feature: 2NO-2NC contact configuration; Business Impact: Flexible control logic and wiring options, enabling complex interlocks and safe fail-safe operations; Application: Three-wire, three-pole control schemes in critical equipment. Feature: UL 977 certification and broad NEMA compatibility (1, 3R, 4, 12); Business Impact: Ensures regulatory compliance and rugged performance across environments; Application: Enclosures and installations in CBC panels and harsh plant settings. Feature: Ground fault with control power transformer; Business Impact: Enhances protection against ground faults and improves system reliability, reducing fault-related downtime; Application: Industrial power distribution with transformer-enabled control power. Feature: Top feed and fusible configuration; Business Impact: Simplifies wiring topology and enhances protection coordination, accelerating installation; Application: Pre-wired top-feed assemblies in high-current systems. These features collectively support reduced downtime, safer operation, and faster maintenance planning across industrial automation environments.
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FAQs
CB1633T120480GRAR7 serves as a high-current, three-pole bolted pressure contact switch for industrial power distribution. It supports 1600A loads, 480V system voltage, and 120V control voltage, with SPVR and BFD indicators for clear fault signaling. Its topology and NEMA enclosure compatibility make it ideal for CBC panels and harsh plant environments.
Key specs include 1600A amperage rating, 480V system voltage, 120V control voltage, three-pole configuration, 2NO-2NC contact set, top feed fuse configuration, and fusible protection. It is designed for top-feed installations and supports ground fault with a control power transformer, facilitating safe operation in large-scale distributions.
The SPVR capacitor trip device provides controlled tripping for single-phase circuits, ensuring short-circuit protection with a capacitor-assisted trip. The BFD indicators (three off lights) provide real-time fault status, enabling operators to quickly identify which contact path tripped, speeding diagnostics and reducing unplanned downtime.
Yes, CB1633T120480GRAR7 is UL 977 listed. It supports multiple NEMA enclosures including NEMA 1, NEMA 3R, NEMA 4, and NEMA 12, giving installers flexibility to meet environmental and protection requirements across CBC installations and outdoor or indoor applications.
The product carries Eaton’s standard warranty policy (one year from installation or eighteen months from shipment, whichever occurs first). Maintenance considerations include periodic inspection of the SPVR trip device, BFD indicators, and ensuring proper top-feed wiring; this approach minimizes unexpected failures and extends reliability in mission-critical applications.