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CTKT-1 transformer wholesaler .jpg

China Current Transformer CTKT Series - Reliable Power Management Equipment from Leading Suppliers and Factory

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A current transformer (CT) is a vital component in electrical systems for effectively managing, monitoring, and protecting the power supply. It converts large quantities of alternating current (AC) into smaller, easily measurable values. In various applications such as power generation, transmission, and distribution, high-current circuits are often equipped with safety relays and sensitive measurement devices. As a trusted manufacturer and supplier in China, our factory produces high-quality current transformers designed to meet the stringent demands of industrial applications and ensure reliable performance.

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    Product Details

    Product Overview

    A CT operates on electromagnetic induction and consists of two windings: a secondary winding with many turns linked to safety or measurement devices, and a main winding with a few turns connected in series to a high-current circuit. The primary winding receives a large amount of current, but the secondary winding, which is usually set to 5A or 1A for the bulk of industrial applications, receives very little. This proportionality, also known as the transformation ratio, enables accurate current monitoring while protecting workers and equipment from unsafe voltages.

    โšก
    Sufficient Insulation

    Must sustain high voltage between windings to ensure safe operation.

    ๐Ÿ“
    High Linearity

    Minimizes measurement mistakes for reliable readings.

    ๐ŸŽฏ
    High Precision

    Essential for accurate energy metering in industrial use.

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    Important: Never leave the secondary winding open circuit when using a CT. An open circuit can produce extraordinarily high voltages that could damage electrical equipment and endanger personnel.

    Current transformers are essential to the reliability, effectiveness, and safety of modern electrical systems because they enable more precise current monitoring and problem identification.

    Technical Parameters

    Type Current Range Signal Output Lead Length (mm) Outline Size
    c A B C D
    TIO 0โ€“75A 0โ€“50mA / 0.333V 1m 10 30 34 40.5 14
    T16 0โ€“150A 0โ€“5A / 0.333V 1m 16 38 38.5 51 19
    T24 0โ€“250A 0โ€“5A / 0.333V 1m 24 51.5 49 73 22
    T36 0โ€“600A 0โ€“5A / 0.333V 1m 36 70 53 89 24.5
    T45 0โ€“800A 0โ€“5A / 0.333V 1m 45 79 59 98 22
    T50 0โ€“1000A 0โ€“5A / 0.333V 1m 50 94 70 120 29
    G Accuracy Grade: 1.0 Overload Current: โ‰ฅ 1.2% ln

    Frequently Asked Questions

    โ“ What is a Current Transformer (CT) and how does it work?
    A Current Transformer (CT) works on the principle of electromagnetic induction. It consists of a primary winding connected in series with a high-current circuit and a secondary winding linked to measurement or protection devices. The large primary current is proportionally stepped down to a safe, measurable secondary current โ€” typically 5A or 1A โ€” based on the transformation ratio.
    โ“ Why should the secondary winding of a CT never be left open circuit?
    Leaving the secondary winding open circuit is dangerous. Without a connected load, all the primary magnetic flux drives the secondary winding, generating extremely high voltages that can damage insulation, destroy equipment, and pose serious safety hazards to personnel. Always ensure the secondary is connected to a load or short-circuited before disconnecting instruments.
    โ“ What accuracy grade do these current transformers offer?
    These current transformers are rated at Accuracy Grade 1.0, which means the measurement error is within ยฑ1% of the true value. This level of accuracy is well-suited for energy metering and industrial monitoring applications where precision is critical.
    โ“ What current ranges are available for these CT models?
    The CT series covers a wide range of current ratings to suit different applications: TIO (0โ€“75A), T16 (0โ€“150A), T24 (0โ€“250A), T36 (0โ€“600A), T45 (0โ€“800A), and T50 (0โ€“1000A). All models feature a 1-meter lead length and output signals of either 0โ€“50mA / 0.333V or 0โ€“5A / 0.333V.
    โ“ What does the overload current specification mean?
    The overload current rating of โ‰ฅ 1.2% ln indicates that the CT can withstand current levels at least 1.2 times its rated current (ln) without sustaining damage or significant measurement degradation. This provides a safety margin for temporary current surges in the monitored circuit.
    โ“ What are the main application areas for these current transformers?
    These current transformers are widely used in industrial power monitoring, energy metering systems, electrical protection relays, smart grid infrastructure, and building automation. Their compact outline dimensions and standardized signal outputs make them compatible with a broad range of measurement and control devices.