Eaton ER3R-400J3PR Enclosed Rotary Disconnect Switch - NEMA 3R
Part Number: ER3R-400J3PR
Quick Summary
Eaton ER3R-400J3PR is an enclosed rotary disconnect switch used to safely isolate power in electrical panels and industrial equipment. Engineers often struggle with safe isolation, space constraints, and keeping commissioning documentation streamlined across sites. This device carries CE marking, NEMA 3R enclosure protection, and robust ratings to support reliable operation in diverse environments. The combination of a fuse-type J design and a pistol handle simplifies maintenance while meeting stringent safety requirements, reducing downtime and improving overall system reliability in electrical protection and circuit control applications.
Product Information
Extended Description
ER3R-400J3PR Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Fuse type J, Pistol handle, 600V, 400A, Red, NEMA rating 3R
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER3R-400J3PR
UPC
051712416030
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
19 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
400A
NEMA rating
NEMA 3R
Voltage rating
600 V
Special features
Fuse type J, Pistol handle
ER3R-400J3PR~ENC DISC400J NEMA3R RED
ER3R-400J3PR~ENC DISC400J NEMA3R RED
Eaton Specification Sheet - ER3R-400J3PR
Feature → Business Impact → Application: The 400A, 600V rating delivers high-current isolation with a compact, enclosure-friendly form factor, enabling safer motor control and power distribution in compact panels. This translates to improved safety, reduced arc-flash exposure, and easier compliance with industry standards for electrical protection and control. Application-wise, it suits outdoor substations, industrial control panels, and MCCs where durable NEMA 3R protection is essential and installation time must be minimized. Feature → Business Impact → Application: Fuse type J and pistol handle simplify replacement and operation, lowering maintenance costs and safeguarding operators during engagement and isolation. In practice, technicians appreciate the predictable handle position and clear indication during routine checks, which accelerates commissioning and reduces human error in critical safety steps. Feature → Business Impact → Application: CE Marked compliance supports international projects and cross-border procurement, ensuring alignment with regulatory expectations while leveraging Eaton Bussmann series compatibility for streamlined spares and standardization across facilities.
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FAQs
To install the ER3R-400J3PR, mount the enclosed rotary disconnect within a compatible electrical cabinet or panel, align with the standard mounting pattern, and wire to the 600 V supply and 400 A load terminals using properly rated conductors. Ensure the fuse type J is installed correctly and verify the pistol handle operation for ON/OFF clearance. Confirm CE marking compliance and test operation after installation.
Key ratings include a 400 A amperage rating, 600 V voltage rating, and a NEMA 3R enclosure. The switch uses fuse type J and features a pistol handle for safe manual operation. It is CE marked for international compliance. These specs support safe isolation in demanding industrial environments and compatibility with Bussmann series protection schemes.
Yes, the device is designed with a NEMA 3R enclosure, providing rainproof and outdoor-rated protection suitable for industrial sites, outdoor substations, and weather-exposed panels. CE marking further supports use in regions with stringent safety standards. Proper installation and enclosure sealing are still essential to ensure long-term reliability in harsh conditions.
Routine maintenance focuses on verifying mechanical operation of the pistol handle, confirming clear ON/OFF indication, and inspecting terminal connections for tightness. With a 400 A, 600 V rating and robust NEMA 3R enclosure, the unit is designed for long service life, minimizing frequent replacements. Having a standard spare per Bussmann series improves uptime and expedites after-sales support.
The ER3R-400J3PR offers reduced downtime through reliable power isolation, safer operation for technicians, and streamlined maintenance due to standardized fuse type J and familiar Bussmann series integration. While upfront cost reflects high-capacity protection, the long-term ROI comes from lower arc-flash risk, fewer panel interventions, and easier cross-site procurement for spare parts.