Eaton CT-SP-2031-400-5 Current Sensor - UL Recognized
Part Number: CT-SP-2031-400-5
Quick Summary
The Eaton CT-SP-2031-400-5 current sensor provides 5 A output for monitoring up to 400 A in electrical panels. Engineers often struggle with installation complexity, panel space constraints, and obtaining accurate readings during retrofits. This device carries UL Recognized and CSA Certified markings, supporting safety and regulatory compliance in critical applications. As a 5A split-core current transformer, it enables rapid integration with metering and protection systems while minimizing downtime. Its compact form factor, 5.71 in length, and window 1.97 x 3.15 in help fit crowded panels, MCCs, and service entrances. By combining reliable accuracy with straightforward installation, it delivers measurable business value through faster projects and consistent protection.
Product Information
Extended Description
CT-SP-2031-400-5 Eaton: Split Core CT 400A, 1.2% ACCY, 1.97 x 3.15 inch window
Product Name
Eaton 5A split core current sensor
Catalog Number
CT-SP-2031-400-5
UPC
786689884611
Product Length/Depth
5.71 in
Product Height
1.97 in
Product Width
4.49 in
Product Weight
1.5 lb
Certifications
UL Recognized CSA Certified
Amperage Rating
400A
Quantity
1
Current transformer type
Split Core
Application current (primary rating)
400A
Output Current (Secondary)
5A
Power Systems Experience Center Tour – Metering Focus
5A split core current transformers (CT-SP) technical data
5A split core current transformers (CT-SP) technical data
Feature: Split-core design and 400A primary rating with a 5A secondary output. Benefit: Simplified installation without disconnecting conductors, reducing field downtime while ensuring compatible interfacing with standard meters and relays. Application: Ideal for panel boards, switchgear, and energy meters requiring quick retrofits and reliable protection. Feature → Business Impact → Application: 1) 1.2% accuracy at rated current improves protection relays and metering accuracy, lowering alarm drift and false trips in demanding electrical environments. 2) Compact dimensions (5.71 in L, 1.97 in H, 4.49 in W) enable installation in tight panel spaces and MCCs, speeding deployment across installations. 3) UL Recognized and CSA Certified assurance reduces compliance risk and supports procurement with confidence for industrial facilities. 4) 5A secondary current supports standard instrumentation and metering inputs, reducing the need for special interfaces. 5) Window size 1.97 x 3.15 inches accommodates typical conductor layouts while preserving measurement integrity, minimizing WIP.
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FAQs
The CT-SP-2031-400-5 uses a split-core design that clamps around a single conductor without disconnecting power. Ensure the conductor fits within the 400 A primary rating and the window accommodates a 1.97 x 3.15 inch opening. Connect the secondary leads to compatible metering or protection devices and verify orientation. The UL Recognized and CSA Certified rating supports safe integration in panel boards and switchgear.
This sensor has a primary amperage rating of 400 A and provides a 5 A secondary output. It delivers 1.2% accuracy at rated current, ensuring reliable metering and protective relay signals in typical electrical distribution applications, with performance suitable for energy management and fault detection.
Yes. The CT-SP-2031-400-5 is designed for main and branch circuit monitoring where a 400 A primary feeds a 5 A secondary. It pairs well with metering equipment and protection relays in three-phase systems, delivering accurate current measurement for phase-by-phase or neutral monitoring, depending on how the conduits are routed and connected.
The CT-SP-2031-400-5 is UL Recognized and CSA Certified, signaling compliance with safety and performance standards for electrical distribution equipment. These certifications reduce procurement risk for regulated facilities, support proper integration with building management and energy systems, and help ensure reliability in demanding environments.
The split-core design minimizes installation downtime and required conductor removal, lowering labor costs. The 1.2% accuracy and 5A output provide stable, repeatable readings for metering and protection, reducing false alarms and maintenance visits. Over time, this translates to faster project delivery, improved energy visibility, and predictable total cost of ownership in distribution panels.