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    Split-Core Current Transformers (5A, 1A, .333V, 1V)
    A high-voltage split-core current transformer (CT) is a non-invasive device with a hinged core that easily clamps around existing high-voltage (HV) conductors (like 11kV, 33kV) for measuring high currents (amps) without cutting wires, providing lower, safe signals (1A, 5A, 333mV) for meters, relays, and energy management, perfect for retrofits in switchgear and power distribution, using resin casting for insulation and accuracy. 
    Key Features & Function 
    • Non-Invasive: Its hinged design allows it to open and snap around a live cable or busbar, avoiding power interruption.
    • High Voltage Rated: Insulated with resin, they handle systems like 11kV, 33kV, and higher, common in industrial/utility settings.
    • Accuracy: Provides precise current readings (e.g., Class 0.5, 0.5s) for metering and protection.
    • Standardized Output: Steps down high primary current to standard secondary levels (1A, 5A, 0.333V) for instruments.
    • Applications: Used for energy monitoring, sub-metering, cost allocation, and protective relaying in compact ring main units (RMUs) and distribution boxes. 
    How It Works 
    1. Sensing: High AC current in the conductor creates a magnetic field in the transformer's core.
    2. Induction: This field induces a proportionally lower current in the secondary coil.
    3. Measurement: The low-current/voltage output connects to analyzers, meters, or relays for safe reading and system control. 
    Types & Specs 
    • Output: 1A, 5A, 0.333V, or 1V.
    • Current Range: From 5A up to 5000A or more, depending on the model.
    • Construction: Resin-cast for insulation, often ring (circular) or rectangular, with various window sizes. 
    • 11KV 33KV High voltage Split Core CT current transformer
      HomeProductsSplit Core Current Transformer11KV 33KV High Voltage Split Core CT Current Transformer. LZCK322-10 11KV 33KV high volt...
      gfuve
    • Understanding Split Core Current Transformer Design ...
      Split core CTs incorporate a unique design that allows the core to be opened and closed around a conductor without interrupting th...
      Yokogawa Test & Measurement
    • Split-Core Current Transformers | Accuenergy
      Split-core current transformers provide accurate measurements of AC electrical systems and feature a removeable or hinged leg for ...
      Accuenergy
    • Split Core Current Transformer - GFUVE Electronics
      LZCK322-10 11KV 33KV high voltage split core cT current transformer * Resin cast. * 10-35KV system. * 5A or 1A output. * Accuracy ...
      GFUVE Electronics
    • Current Transformers - Output Ranges 1-5A & 0.333-1V - FLEX-CORE
      What is the Primary Function of a Current Transfomer? The primary function of a Current Transformer (CT) is to measure alternating...
      FLEX-CORE
    • 11KV 33KV High voltage Split Core CT current transformer
      HomeProductsSplit Core Current Transformer11KV 33KV High Voltage Split Core CT Current Transformer. LZCK322-10 11KV 33KV high volt...
      gfuve
    • Understanding Split Core Current Transformer Design ...
      Split core CTs incorporate a unique design that allows the core to be opened and closed around a conductor without interrupting th...
      Yokogawa Test & Measurement
    • Split-Core Current Transformers | Accuenergy
      Split-core current transformers provide accurate measurements of AC electrical systems and feature a removeable or hinged leg for ...
      Accuenergy
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    11KV 33KV High voltage Split Core CT current transformer


    gfuve
    https://www.gfuve.com › split-core-current-transformer
    gfuve
    https://www.gfuve.com › split-core-current-transformer
    This model split core ct can be used both for measurement and microcomputer protection of electrical equipment in 11KV and 35KV AC power system.
    high voltage split core current transformer from www.gfuve.com

    Split-Core Current Transformers (5A, 1A, .333V, 1V)


    FLEX-CORE
    https://www.flex-core.com › split-core-current-transfor...
    FLEX-CORE
    https://www.flex-core.com › split-core-current-transfor...
    FLEX-CORE offers split-core current transformers with features like flexible standard meter output, multi-ratio, revenue grade, removable leg, and low cost. ...
    high voltage split core current transformer from www.flex-core.com
    Discussions and forums
    Voltage output with a split-core CT
    Reddit · 
    r/ElectricalEngineering
     · 5 comments
     · 2 years ago
    Voltage output with a split-core CT
    Reddit · 
    r/ElectricalEngineering
     · 5 comments
     · 2 years ago
    Short circuiting a CT is fine (0 V). Open circuiting a CT will cause arcing ( high voltage).  More
    How do YHDC split core current transformers provide DC output? Other ...
    Reddit · 
    r/ElectricalEngineering
     · 3 comments
     · 1 year ago
    How do YHDC split core current transformers provide DC output? Other ...
    Reddit · 
    r/ElectricalEngineering
     · 3 comments
     · 1 year ago
    According to the datasheet, https://www.poweruc.pl/products/split-core-current-transformer-sct024t-d ...  More
    Top answer · a year ago
    Thanks, that helps. I plan on reading this with an ADC at about 1000 samples / second. I wonder ...  More
    a year ago
    Parasitic power using split core current transformer - General Electronics
    Arduino Forum · 
    10 years ago
    Parasitic power using split core current transformer - General Electronics
    Arduino Forum · 
    10 years ago
    The output voltage from a CT is AC , and usually in the low millivolt range, some range up into the hundreds of millivolts with a high current ...  More
    See more
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    Understanding Split Core Current Transformer Design ...


    Yokogawa Test & Measurement
    https://tmi.yokogawa.com › resources › application-notes
    Yokogawa Test & Measurement
    https://tmi.yokogawa.com › resources › application-notes
    Comprehensive review of split core CTs, their principles of operation, design considerations, advantages, disadvantages, and applications.
    high voltage split core current transformer from tmi.yokogawa.com
    People also ask
    What is the purpose of a split core current transformer?
    Split-core current transformers are used to monitor AC current for various devices. The current transformer input takes a high-voltage current input and produces a proportional low-voltage, low-current signal for measuring and monitoring.

    Split Core Current Transformer - Banner Engineering


    Banner Engineering
    https://info.bannerengineering.com › public › literature
    Banner Engineering
    https://info.bannerengineering.com › public › literature
    What is the difference between CTs and VTs?
    CTs are connected in series with the circuit, whereas VTs are connected in parallel. Additionally, the secondary winding of a VT must never be short-circuited, and the secondary winding of a CT must never be left open.Jun 18, 2025

    Voltage and current transformers – what are they and what ... - Alterga


    Alterga
    https://alterga.com › blog › voltage-current-transformers...
    Alterga
    https://alterga.com › blog › voltage-current-transformers...
    Why is a core type transformer used for high voltage?
    It is because, the placement of low voltage winding near to the core reduces the need of insulating material required. The major advantage of a core type transformer is that it is easier to dismantle for repair and maintenance. Also, the natural cooling in a core type transformer is efficient.

    Difference between Core Type and Shell Type Transformer


    rngpit.ac.in
    https://rngpit.ac.in › wp-content › uploads › 2024/04
    rngpit.ac.in
    https://rngpit.ac.in › wp-content › uploads › 2024/04
    What is H1 on a CT?
    The H1 is the primary positive terminal. This terminal may have a white dot on the casing to indicate polarity. The H2 is the primary negative terminal. The X1(S1) is the secondary positive terminal.Nov 11, 2010

    Current Transformer (CT), Potential Transformer (PT) wiring standards


    Schneider Electric
    https://www.se.com › faqs
    Schneider Electric
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    Feedback

    5A Split Core Current Transformer


    Eaton
    https://www.eaton.com › en-us › catalog › 5a-split-core-...
    Eaton
    https://www.eaton.com › en-us › catalog › 5a-split-core-...
    Eaton's 5A split core current transformers allow the CTs to be placed around the conductor without having to disconnect the conductor or disrupt the wiring.
    high voltage split core current transformer from www.eaton.com

    Flex-Core Split Core Current Transformers


    Weschler Instruments
    https://www.weschler.com › product › flex-core-split-c...
    Weschler Instruments
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    high voltage split core current transformer from www.weschler.com

    LZCK322-10 11KV 33KV HIGH VOLTAGE 200/5A SPLIT ...


    GFUVE GROUP
    https://gfuvegroup.com › split-core-current-transformer
    GFUVE GROUP
    https://gfuvegroup.com › split-core-current-transformer
    The LZCK322-10 is a split core current transformer for 11KV/35KV systems, used for measurement and protection, with 20+ year life, 0.5-1% precision, and 0-1000 ...

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    ctzentar.com
    https://www.ctzentar.com › high-voltage-split-core-curr...
    ctzentar.com
    https://www.ctzentar.com › high-voltage-split-core-curr...
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    Accuenergy
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