Eaton ER3R-400N3PR Enclosed Rotary Disconnect - NEMA 3R
Part Number: ER3R-400N3PR
Quick Summary
The enclosed rotary disconnect ER3R-400N3PR provides safe circuit isolation for industrial control panels. Many engineers struggle with downtime and arc-flash risk during maintenance and isolation. It carries CE Marked compliance and is rated NEMA 3R for outdoor or harsh environments. The non-fused design with a pistol handle simplifies operation, reduces wear, and minimizes switching time, while delivering robust current handling up to 400 A at 600 V. This combination supports compliant, reliable power control and faster service interventions, improving uptime. For procurement teams, the Eaton Bussmann series offers predictable lifecycle costs and straightforward integration with existing Eaton protection products, delivering tangible safety and efficiency benefits in the plant.
Product Information
Extended Description
ER3R-400N3PR Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Non-fused, Pistol handle, 600V, 400A, Red, NEMA rating 3R
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER3R-400N3PR
UPC
051712420006
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
Non-fused, Pistol handle
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - ER3R-400N3PR
Feature: Enclosed design with non-fused operation; Business impact: Improves safety and reduces maintenance downtime by eliminating fuse handling during routine isolation; Application: Industrial control panels and exterior switchgear. Feature: 600 V voltage rating and 400 A amperage; Business impact: Handles demanding motor loads and feeder circuits with reliable isolation, lowering failure risk; Application: Medium-voltage panels and machine disconnects in manufacturing lines. Feature: NEMA 3R enclosure rating; Business impact: Weather-resistant protection for outdoor or harsh environments, extending service life and reducing enclosure upgrades; Application: Outdoor substations and outdoor control rooms. Feature: Pistol-style handle; Business impact: Ergonomic operation lowers operator effort and exposure during live work, improving productivity; Application: Daily switching operations in maintenance routines. Feature: CE Marked compliance; Business impact: Facilitates cross-border procurement and regulatory alignment, reducing compliance overhead; Application: Projects in EU and other CE jurisdictions. Feature: Compatibility with Bussmann series line; Business impact: Simplifies sourcing and installation, reducing lead times and integration risk; Application: Retrofit or expansion projects in existing Eaton ecosystems. Industry context: In industries such as food and beverage, water treatment, and general manufacturing, this device supports safer, faster, and more compliant isolation of critical circuits, enabling smoother maintenance windows and reduced downtime.
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FAQs
The ER3R-400N3PR is designed for straightforward integration into standard industrial control panels and compatible Bussmann series enclosures. Ensure proper mounting clearance, secure terminal connections for 400 A service, and verify that the enclosure provides appropriate ingress protection for the intended environment. Orientation should follow manufacturer guidance to optimize operator access on the pistol handle and enable safe, quick isolation during maintenance.
Yes. The device carries a NEMA 3R rating, indicating weather-resistant performance suitable for outdoor and semi-exposed locations. When deploying outdoors, pair the switch with a compatible weatherproof enclosure and ensure proper sealing around wiring terminations. Regular inspections should verify enclosure integrity and that the pistol handle remains accessible for safe operation.
The ER3R-400N3PR is a non-fused disconnect, meaning it provides isolation without internal fuses. This simplifies maintenance and reduces replacement parts, but it relies on downstream protection. For circuit safety, downstream fusing and appropriate protection devices must be selected to match the 400 A, 600 V rating and the load characteristics.
Yes, the ER3R-400N3PR is CE Marked, indicating conformity with applicable European safety, health, and environmental standards. When installing, ensure compliance with local electrical codes and EU regulations, including proper labeling, installation practices, and documented conformity assessments to maintain CE compliance throughout the product lifecycle.
The non-fused, pistol-handle design reduces maintenance tasks and handling time during routine isolations, while the 400 A, 600 V rating supports higher fault-current resilience. Combined with CE and NEMA 3R protection, the ER3R-400N3PR can lower downtime, improve safety, and shorten service windows, delivering favorable total cost of ownership in manufacturing and process environments.