Eaton BU-EAFR-101B Arc flash relay - 4 Trip relays
Part Number: BU-EAFR-101B
Quick Summary
Arc flash relay BU-EAFR-101B detects arc faults in electrical switchgear and isolates faults to protect personnel and equipment. In dense switchgear rooms, slow fault isolation and nuisance tripping erode uptime and inflate maintenance costs. Regional compliance and approvals, including CE, SIL, and IP ratings, should be confirmed with the manufacturer to ensure site-ready deployment. Designed for scalable protection with up to 12 point sensors and four NC trip relays, it fits modern protection strategies, enabling safer operations, reduced arc energy exposure, and lower total cost of ownership.
Product Information
Extended Description
BU-EAFR-101B Eaton: Eaton arc flash relay point sensor, Point sensor unit, Max 12 point sensors, 4 Trip relays, NC trip contact, CURRENT,FIBER LOOP SENSOR UNIT, NC TRIP
Product Name
Eaton arc flash relay point sensor
Catalog Number
BU-EAFR-101B
UPC
051712748216
Product Length/Depth
6.89 in
Product Height
6.18 in
Product Width
1.85 in
Product Weight
1 lb
Compliances
Contact Manufacturer
Type
Arc flash relay
Feature: Up to 12 point sensors provide scalable protection for complex switchgear arrays. Business Impact: Enables selective coordination and faster fault recognition, reducing arc energy exposure and downtime. Application: Large industrial power distribution with multi-bus configurations. Feature: Four NC trip relays deliver redundant paths and fail-safe operation. Business Impact: Improves reliability and safety margins while simplifying testing and maintenance. Application: Critical process lines and safety circuits requiring robust protection. Feature: Point sensor unit and fiber loop sensor integration enhance arc detection accuracy. Business Impact: Minimizes nuisance trips and accelerates disconnection, preserving production continuity. Application: High-density switchgear and data center utility feeds. Feature: Compact form factor and Eaton protection architecture compatibility streamline installation. Business Impact: Reduces wiring effort, installation time, and field wiring errors. Application: Retrofit projects and new installations within existing Eaton protection ecosystems. Feature: Comprehensive datasheet and regional compliance review support. Business Impact: Shortens qualification cycles and ensures proper approvals before commissioning. Application: Global deployment with regional regulatory considerations.
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FAQs
Yes. BU-EAFR-101B is designed to integrate with Eaton protection architectures and can be wired to standard NC trip contacts. While regional approvals vary, the device is intended to work within common protection schemes when properly commissioned; consult the specification sheet for wiring diagrams and verified configurations.
Key specifications include support for up to 12 point sensors, four trip relays with NC contacts, a compact 6.89 in by 6.18 in by 1.85 in form factor, and a weight of 1 lb. The catalog number is BU-EAFR-101B, UPC 051712748216, and the unit is categorized as an arc flash relay with a dedicated point-sensor interface.
The BU-EAFR-101B is ideal for industrial power distribution and large switchgear installations requiring fast arc fault detection and reliable fault isolation. It supports multi-point sensing and multiple trip relays, enabling scalable protection across complex bus configurations and high-density protection schemes.
Compliance details vary by region; Eaton lists ‘Compliances’ as ‘Contact Manufacturer’ for this part. For global deployments, confirm CE, SIL, and IP ratings with Eaton or via the official spec sheet to ensure site-specific regulatory alignment before commissioning.
Expect reduced downtime through faster fault isolation and lower arc exposure, which translates to improved productivity and safety. The four NC trip relays and multi-point sensing simplify wiring and testing, potentially lowering maintenance costs over time while aligning with best-practice arc flash protection strategies.