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    Flexible Current Transformer, 10000A AC, 7.5mm

    The flexible current transformer coil diameter Φ7.5mm, range 0A~10000A, coil inner diameter φ50mm,100mm, 500mm optional. The Coil current transformer is soft and flexible, with no exposed metal conductors in the coil section, making it suitable for measuring current in conductors of very large size or irregular shape.
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    📅 Delivery: 7-12 days

    Buy 10000A AC flexible current transformer online, resolution 10mA, coil diameter Φ7.5mm, coil length and interface are customizable. Flexible current transformer is the ideal tool for detecting AC currents, high harmonic currents, complex waveform currents, transient inrush currents.

    Flexible current transformer 7.5mm

    Non-contact measurement, safe and reliable.

    • The flexible coil current transformer consists of a coil and a handle, without any exposed metal conductor in the coil part, non-contact measurement, safe and reliable.
    • The flexible current transformer is small, light, flexible, and suitable for narrow environments and densely lined places, as well as for measuring conductor currents of large size or irregular shape.
    • Wide measurement range, high accuracy, high reliability, and wide response band. It is especially suitable for relay protection, silicon-controlled rectification, frequency control, semiconductor switching, power electronic conversion equipment, arc welding, and other industrial environments with severe signal distortion.


    Flexible current transformers are an indispensable accessory for small, medium, and large electronic companies. The sisco flexible current transformer is suitable for use in power equipment testing, communications and telecommunications, railway and oilfield monitoring, building and construction companies, research and teaching units, industrial and mining records, and other fields.  

    Clamp-on current transformer applications

    Measuring Range AC 0A~10000A
    Coil Diameter 7.5mm
    Resolution 10mA
    Accuracy Level 1%FS (50Hz/60Hz; 23°C to 2°C, below 70%RH, wire in the center of the coil)
    Phase Error ≤0.1°(50Hz/60Hz; 23℃±2℃)
    Integrator Output Connector 3.5mm audio plug/BNC connector/bare wire(optional)
    Wire Length 2M
    Integrator Mass Approx. 205g
    Integrator Output Connector 3.5mm audio plug/BNC connector/tip (optional)
    Integrator Output Cable Length 2m
    Electric Field Interference No hysteresis effect, no external electric field interference
    Wire Position The test wire is in the center of the coil, position error ≤ 0.5% FS
    Response Frequency 0.1Hz ~ 1MHz
    Line Voltage AC 1000V or less line test
    Random Accessories Flexible coil x 1, integrator x 1, 6F229V battery x 1
    Working Temperature and Humidity -20℃~50℃; 80%rh or less
    Storage Temperature and Humidity  -10℃~60℃;70%rh below
    Dielectric Strength AC 2000V/rms (both ends of the coil after unlocking and unfolding)
    Safety Regulation CAT IV 500V, CAT Ⅲ 1000V

    Model (optional)

    Model Coil Inner Diameter Coil Length Coil Mass
    SISCO-ETCR50FA Φ50mm 160mm  80g
    SISCO-ETCR100FA Φ100mm 320mm 90g
    SISCO-ETCR150FA Φ150mm 480mm 100g
    SISCO-ETCR200FA Φ200mm 640mm 110g
    SISCO-ETCR300FA Φ300mm 950mm 132g
    SISCO-ETCR500FA Φ500mm 1580mm 170g
    SISCO-ETCR1000FA Φ1000mm 3150mm 290g
    SISCO-ETCR1500FA Φ1500mm 4720mm 390g

    Flexible current transformer details

    Integrator Output Connector

    Flexible current transformer integrator output connector


    Q1: What is a flexible current transformer?
    A1: A flexible current transformer is an AC current sensor consisting of a toroidal coil uniformly wound on a non-ferromagnetic material and an integrator. The output signal is the differentiation of current against time and can be directly applied to the conductor being measured to measure AC current.

    Q2: What are the advantages of flexible current transformers?
    A2: Flexible current transformers are essentially just a pair of cables, allowing you to easily reach even the tightest sections. This feature is also particularly handy when you are working in high places. The design of the flexible current transformer eliminates the risk of encountering a secondary open circuit. As a result, the risk of electrocution or transformer overload is mitigated. Of course, this doesn't mean you can be lax about safety procedures, but it does provide a sense of security when working.

    Q3: What are the wiring methods of current transformers?
    A3: There are two types of current transformer wiring, the first is the use of two current transformers two-phase V-shaped wiring and two-phase current differential wiring, and the second is the use of three current transformers three-phase Y-shaped wiring, three-phase triangle wiring, and zero sequence wiring.

    Tips: Current transformer wiring principles

    • Do not allow open circuits. A secondary open circuit is easy to cause safety accidents because the secondary open circuit will lead to core overheating and induction of high voltage.
    • There must be a point of grounding. A current transformer is a measurement for high voltage, if there is a point of grounding, you can introduce high voltage to the earth, but note that grounding can not be two points, so as not to shunt.
    • Protection level and measurement level can not be connected to the wrong. Once the two are connected wrong, then it may lead to relay protection is not responsive and inaccurate power measurement.
    • Unused windings need to be shorted to avoid affecting the measurement accuracy, but the current transformer has multiple taps, the unused taps that need to be carried out and can not be shorted.

    Thank you for buying industrial test and measurement equipment on, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.

    What is covered?

    SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than SISCO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by SISCO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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