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Product Detailed Parameters
- Description：CURR SENSE XFMR 100:1 5A IN-LINE
- Series：ELCT
- Mfr：Littelfuse Inc.
- Package：Box
- Frequency Range：50Hz ~ 400Hz
- Type：Non-Invasive (Solid Core)
- Inductance：-
- ET (Volt-Time)：-
- Current Ratio：05:00.1
- DC Resistance (DCR)：-
- Ratings：-
- Mounting Type：Free Hanging (In-Line)
- Size / Dimension：2.888" L x 2.860" W (73.36mm x 72.64mm)
- Height - Seated (Max)：2.452" (62.28mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：100:01:00
- Current Rating (Amps)：5:00 AM
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Overview
The Littelfuse ELCT5-31 is a current sense transformer designed for precision monitoring of low-level earth-leakage currents. It features a 100:1 turns ratio and operates within a frequency range of 50Hz to 400Hz. The device includes an integrated flux conditioner to enhance signal accuracy. It utilizes a free-hanging in-line mounting style with a sensor hole size of 31mm (1.24 inches), allowing it to encircle the conductor directly without additional core assembly.
Feature Summary
- Integrated flux conditioner for improved detection of low-level leakage currents
- Free-hanging in-line design for direct conductor installation
- Compatible with Littelfuse relays for sensitive current sensing applications
Applications
- Earth-leakage current detection systems
- Ground fault circuit interrupter (GFCI) monitoring
- Residual current device (RCD) implementations
Procurement Notes
Verify the specific part number against official Littelfuse documentation to ensure compatibility with existing relay systems. Confirm that the required frequency range of 50Hz to 400Hz aligns with the target application's electrical parameters. Check for any updated datasheet revisions that may affect mechanical dimensions or electrical characteristics before finalizing procurement orders.
Selection Notes
Select this component when precise detection of small earth-leakage currents is required in conjunction with Littelfuse relays. The integrated flux conditioner makes it suitable for applications where standard transformers might lack sufficient sensitivity. Ensure the conductor diameter fits within the 31mm aperture and that the operating frequency falls within the specified 50Hz to 400Hz range for optimal performance.
Part Context
The ELCT5-31 belongs to the ELCT series of current transformers from Littelfuse. This series is specifically engineered as sensitive current transformers with integrated flux conditioners. They are primarily intended to work alongside Littelfuse relays to detect low levels of earth-leakage current, providing a specialized solution for safety and monitoring circuits rather than general power measurement.
Replacement Considerations
Consult official Littelfuse substitution guides for verified alternative part numbers within the ELCT series. Ensure any replacement maintains the 100:1 ratio, 31mm aperture, and integrated flux conditioner specifications to preserve system functionality.
