Current Transformer & Current Transducers | RS
Login / Register to access your benefits
Recently searched

    Current Transformers

    Current transformers or (CT’s), also known as Core Balance Current Transformers or Current Transducers, are instruments that are used to reduce or multiply the current from a high current into a lower current or vice versa. This is done so that the power can then be easily managed by Relays and measurement tools for electrical circuits and processes. Current Transformers consist of a core, a primary and a secondary winding.

    RS offer an extensive range of highly accurate Core Balance Current Transformers in various transformer types, current ratings, CT ratio supply voltages and mounting types to suit every application. Supplied by industry-leading brands including Siemens, Murata Power Solutions LEM and of course RS PRO.

    How does a current transformer work?

    When an alternating current flows through the primary winding, a magnetic flux is created which then induces an alternating current in the secondary winding. This alternating current is proportional to the current in its primary. Current transformers are also known as a “step-down transformer”. Once the current has been reduced it can be safely monitored and measured using an Ammeters

    Types of current transformer

    Toroidal Current Transformer

    • These transformers are shaped like a doughnut they do not contain a primary winding. Instead, the line that carries the current flowing in the network is threaded through a window or hole in the toroidal transformer. Toroidal transformers offer high efficiency with minimal excess noise and little excess leakage inductance.

    Wound Current Transformer

    -The transformers primary winding is physically connected in series with the conductor that carries the measured current flowing in the circuit. The magnitude of the secondary current is dependent on the turn’s ratio of the transformer.

    Bar-type Current Transformer

    – This type of current transformer uses the actual cable or bus-bar of the main circuit as the primary winding, which is equivalent to a single turn. They are fully insulated from the high operating voltage of the system and are usually bolted to the current-carrying device.

    Where would I use a Current Transducer?

    CTs are used in a wide range of industrial and commercial measurement applications. Some of the most common are:

    • Generating Stations
    • Electrical Substations
    • Commercial Electric
    • Power Distribution
    • Electrical Panels

    Browse the broad range of Current Transformers RS have to offer and order today for next day delivery.

    1595 Products showing for Current Transformers

    WAGO
    400:1
    -
    855
    Split Core
    Current Transformer
    -
    400A
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    Socomec
    -
    -
    TE-55
    -
    -
    300 V
    400 → 1000A
    -
    100mm
    55mm
    -
    -
    -
    -
    -
    -
    LEM
    150:1
    1.75mm
    HO
    -
    Open Loop
    4.5 → 5.5 V
    60A
    19 → 25 mA
    27.43mm
    41.56mm
    20.13mm
    -40°C
    +105°C
    -
    -
    PCB Mount
    Nuvotem Talema
    10:1
    -
    AC-1
    -
    -
    -
    10A
    -
    -
    23.8mm
    11.12mm
    -40°C
    +120°C
    -
    -
    PCB Mount
    LEM
    450:1
    15 x 8mm
    HO
    -
    Open Loop
    4.5 → 5.5 V
    180A
    19 → 25 mA
    29.75mm
    42.83mm
    18mm
    -40°C
    +105°C
    -
    -
    Panel Mount
    ABB
    80:1
    10mm
    CMS
    -
    -
    690 V ac, 1500 V dc
    80A
    -
    31.8mm
    45.5mm
    45.5mm
    -25°C
    +70°C
    -
    -
    Cable Mount
    Schneider Electric
    1000:5
    -
    METSECT
    Tropicalise
    -
    -
    1000A
    5 A
    129mm
    135mm
    85mm
    -25°C
    +50°C
    Yes
    Green Premium
    Surface Mount
    Siemens
    1000:1
    -
    Sentron
    Window
    -
    -
    1000A
    1 A
    84.1mm
    112mm
    127.5mm
    -30°C
    +55°C
    -
    -
    Chassis Mount
    HOBUT
    200:5
    -
    CTSCM
    Split Core
    -
    -
    -
    -
    78mm
    58mm
    49mm
    -30°C
    +55°C
    -
    -
    -
    Socomec
    -
    -
    TE-18
    Split Core
    -
    -
    -
    -
    86mm
    53mm
    8.3mm
    -10°C
    +55°C
    -
    -
    Cable Mount
    WAGO
    1000:1
    -
    855
    Split Core
    Current Transformer
    -
    1kA
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    Socomec
    -
    50mm
    IC
    -
    -
    720 V ac
    10A
    -
    125mm
    102.5mm
    -
    -
    -
    -
    -
    -
    ABB
    80:1
    10mm
    CMS
    Current Transformer
    Current Transformer
    690 V ac, 1500 V dc
    80A
    -
    29mm
    41mm
    41mm
    -25°C
    +70°C
    -
    -
    Cable Mount
    LEM
    2000:1
    20.1mm
    LF
    -
    Closed Loop
    12 → 20 V
    300A
    150 mArms
    56.5mm
    60mm
    26.6mm
    -40°C
    +85°C
    -
    -
    Panel Mount
    Siemens
    2000:5
    -
    Sentron
    Window
    -
    -
    2000A
    5 A
    84.1mm
    112mm
    127.5mm
    -30°C
    +55°C
    -
    -
    Chassis Mount
    Lovato
    1500:5A
    80 x 120mm
    DM
    Split Core
    Current Transformer
    -
    -
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    WAGO
    600:1
    -
    855
    Split Core
    Current Transformer
    -
    600A
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    Nuvotem Talema
    15:1
    -
    AS-1
    -
    -
    -
    15A
    -
    -
    20.4mm
    9.53mm
    -40°C
    +120°C
    -
    -
    PCB Mount
    Nuvotem Talema
    40:1
    -
    AC-1
    -
    -
    -
    40A
    -
    -
    23.8 mm, 34.9mm
    11.12 mm, 14.6mm
    -40°C
    +120°C
    -
    -
    PCB Mount
    HOBUT
    10:1
    21mm
    CT132TRAN
    -
    -
    15 → 30 V
    10A
    -
    65mm
    45mm
    30mm
    -15°C
    +50°C
    -
    -
    DIN Rail
    Results per page