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  9. CTKY Series Circular Split-Core Residual Current Transformer (RCT)
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  3. Current/Voltage Transformer
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  5. Current Transformer
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  9. CTKY Series Circular Split-Core Residual Current Transformer (RCT)
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CTKY Series Circular Split-Core Residual Current Transformer (RCT)

Features a snap-open design for tool-free installation in confined spaces. Equipped with a nanocrystalline core for high sensitivity and low temperature drift, suitable for leakage current monitoring and protection in power distribution systems, charging piles, and photovoltaic systems, with tamper-proof and moisture-resistant housing.

Product Features:

  • Compact & Durable Design
    Featuring a space-saving structure ideal for confined installations. The housing is constructed from high-strength, flame-retardant PC/ABS engineering plastic, providing excellent impact resistance and environmental safety.
  • Tool-Free Snap-On Installation
    Equipped with a push-button, split-core mechanism that allows quick and secure mounting without tools, simplifying installation in hard-to-access areas and saving time and labor.
  • Integrated Cable Tie Slots
    Includes dedicated slots for cable ties to ensure neat, organized, and secure wiring while enhancing overall installation aesthetics.
  • Lockable & Tamper-Resistant
    Once installed and sealed, the core locks securely to prevent unauthorized opening or disassembly, ensuring long-term operational integrity.
  • Waterproof & Anti-Corrosion Sealing
    A sealed closure at the magnetic core joint eliminates the need for rust-proof oils, prevents moisture ingress, and avoids oxidation or rusting in high-temperature, high-humidity environments, maintaining long-term measurement accuracy.



Product specifications ：




Model specifications
 External dimensions



Φ  A  B C D
-CTKY30-C 30 73.5 63.5 24 38
-CTKY45-C 45 95.5 84 24 38
-CTKY65-C 65 120 106 24 38



















Product Parameters:



Product model -JCTKY30-C/45-   C/65-C Accuracy 0.2%-0.5%- 1%

Operating Frequency 20－20KHZ Isolation Voltage 2500Vac

Current ratio 1000/1,2000/1  Purpose Residual current measurement signal acquisition

Input current 1A Installation and fixing method Core through type, tied and fixed with zip ties

Output current 1mA，0.5mA  Connection Sheath wire 1.5M

Main circuit current  0-63A/0-160A/0- 250A Operation temperature 12℃ -45℃


Note: The relevant data in this list is only for customers to use for preliminary evaluation and selection. Specific information is subject to the product specifications. Customization can be made according to customer needs.

Previous : ZH-CTK Series Rectangular Split-Core Residual Current Transformer Next : Residual Current Transformer (RCT) - Solid-Core Type
CTKY Series Circular Split-Core Residual Current Transformer (RCT)
Features a snap-open design for tool-free installation in confined spaces. Equipped with a nanocrystalline core for high sensitivity and low temperature drift, suitable for leakage current monitoring and protection in power distribution systems, charging piles, and photovoltaic systems, with tamper-proof and moisture-resistant housing.
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