Current Transformers, CT Meter, Split Core CTs, Core Balance CTs | RS
최근 검색 기록

    Current Transformers

    Current transformers (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. Current transformers, however, work in a slightly different way from voltage transformers. Plus, the amount of reduction in current is dependent upon the turn ratio. Whereas, connecting an ammeter to the CT's terminals will allow you to measure the current easily.

    Current Transformers (CT) consist of a core, a primary and a secondary winding. In some current transformers, the primary winding has a limited number of turns, making it possible for current to be measured without disconnecting it from the supply or load. Since it is arranged in this manner, the current transformer is sometimes called a "series transformer" .

    It is possible, however, that the secondary winding contains many coil turns which are wound atop a laminated core made out of magnetic material that is low-loss. With this core, the cross-sectional area is large, resulting in a low magnetic flux density when coupled with a wire of a smaller cross-section, no matter if it has to step down the current, whatever the load.

    The secondary winding supplies current either to a short circuit, such as an ammeter or a resistive load, up to the point when the secondary becomes saturated or breaks down due to excessive voltage.

    RS offers 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 "step-down transformers". Once the current has been reduced it can be safely monitored and measured using an Ammeters

    Types of current transformer (CT meter)

    #1 - Toroidal Current Transformer

    In the shape of a doughnut, these transformers are designed without having a primary winding as part of their construction. Rather, a toroidal transformer has a window or hole through which the current flowing in the network passes.

    #2 - Wound Current Transformer

    Transformers have primary windings that are connected physically line to line with the conductor bringing the measured current through the circuit.

    #3 - Bar-type Current Transformer

    This type of transformer uses the cable, or busbar, of the main circuit as its primary winding, effectively one turn of the transformer. In most cases, they are bolted directly to current-carrying devices and are fully insulated from high operating voltages.

    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:

    1. Generating Stations
    2. Electrical Substations
    3. Commercial Electric
    4. Power Distribution
    5. Electrical Panels

    Usually, ammeters and current transformers are used in conjunction, with the current transformer being designed to deliver a maximum secondary current equivalent to the ammeter deflection at full scale. It is common for current transformers to have inverse turn ratios between their primary and secondary windings. Therefore, CT calibrations are usually geared towards a specific type of ammeter.

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

    1615 표시되는 제품 Current Transformers

    • RS 제품 번호 200-3802
    • 제조사 부품 번호 LES 50-NP
    개당
    ₩24,778.40
    LEM
    50:1
    -
    LES
    -
    Closed Loop
    +5 V
    50A
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 175-6138
    • 제조사 부품 번호 4NC5117-2CC21
    개당
    ₩117,988.80
    Siemens
    100:5
    -
    Sentron
    Window
    -
    -
    100A
    5 A
    65.6mm
    60mm
    75.3mm
    -30°C
    +55°C
    -
    -
    Chassis Mount
    • RS 제품 번호 221-0313
    • 제조사 부품 번호 192T2115
    개당
    ₩55,452.48
    Socomec
    150:5
    17.5mm
    192T
    -
    -
    -
    150A
    -
    65mm
    49.5mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 182-8467
    • 제조사 부품 번호 192T1405
    개당
    ₩65,367.60
    Socomec
    50:5
    -
    TCA 14
    Toroidal Ring
    -
    -
    50A
    5 A
    65mm
    45mm
    6.7mm
    -
    -
    -
    -
    DIN Rail
    • RS 제품 번호 279-2505
    • 제조사 부품 번호 855-9150/2000-701
    개당
    ₩262,667.96
    WAGO
    -
    -
    855
    Rogowski Coil
    Current Transformer
    -
    1kA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩184,879.20
    LEM
    100:1
    18mm
    APR
    -
    Closed Loop
    24 V dc
    50 A, 75 A, 100A
    0 → 5 V, 0 → 10 V
    69mm
    67mm
    55mm
    -20°C
    +60°C
    -
    -
    DIN Rail
    • RS 제품 번호 331-373
    • 제조사 부품 번호 CT164M500/5-5/0.5-001
    개당
    ₩35,870.40
    HOBUT
    500:5
    28mm
    CT164
    DIN Rail Mounted
    -
    -
    500A
    5 A
    78mm
    60mm
    45mm
    -30°C
    +85°C
    -
    -
    DIN Rail Mounted
    개당
    ₩236,466.40
    LEM
    50:1
    18mm
    APR
    -
    Closed Loop
    24 V dc
    10 A, 25 A, 50A
    0 → 5 V, 0 → 10 V
    69mm
    67mm
    55mm
    -20°C
    +60°C
    -
    -
    DIN Rail
    • RS 제품 번호 175-6145
    • 제조사 부품 번호 4NC5122-0CE21
    개당
    ₩130,265.20
    Siemens
    200:1
    20mm
    Sentron
    Window
    -
    -
    200A
    1 A
    65.6mm
    60mm
    75.3mm
    -30°C
    +55°C
    -
    -
    Chassis Mount
    • RS 제품 번호 497-192
    • 제조사 부품 번호 HASS 200-S
    개당
    ₩32,091.60
    LEM
    200:1
    20.4 x 10.4mm
    HASS
    -
    Open Loop
    5 V
    200A
    -
    30mm
    40mm
    20mm
    -40°C
    +85°C
    -
    -
    Panel Mount
    개당
    ₩232,571.04
    Socomec
    100:5
    -
    TCA 13 - 3P
    DIN Rail Mounted
    -
    -
    100A
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩691,627.56
    Socomec
    -
    -
    CTA-VA4
    Current Transformer
    -
    -
    15A
    0.004 → 0.02 A
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩15,327.64
    U_RD
    800:1A
    5.8mm
    CTL
    Current Transformer
    Current Transducer
    -
    80A
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 173-0056
    • 제조사 부품 번호 AP-1000
    개당가격(250개가 1박스안에)
    ₩4,194.28
    Nuvotem Talema
    10:1
    -
    AP-1
    -
    -
    -
    10A
    -
    -
    20.4mm
    9.53mm
    -40°C
    +85°C
    -
    -
    -
    • RS 제품 번호 122-0464
    • 제조사 부품 번호 192T2110
    개당
    ₩45,552.40
    Socomec
    100:5
    17.5mm
    TCB 17-20
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    DIN Rail
    개당
    ₩62,169.72
    Hager
    -
    15mm
    EK0
    Current Transformer
    Current Transformer
    -
    90A
    90 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 222-4406
    • 제조사 부품 번호 ROG4X1002M3503X
    개당
    ₩1,198,067.60
    Carlo Gavazzi
    -
    120mm
    ROG4X
    Rogowski Coil
    Closed Loop
    -
    4kA
    -
    350mm
    120mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 897-6933
    • 제조사 부품 번호 4 121 58
    개당
    ₩505,340.24
    Legrand
    400:5
    -
    4-121
    Base Mounted
    -
    -
    -
    -
    -
    -
    -
    -25°C
    +50°C
    -
    -
    Surface Mount
    • RS 제품 번호 226-2769
    • 제조사 부품 번호 3NJ4915-2GB11
    개당
    ₩469,285.60
    Siemens
    250:5
    -
    SENTRON
    -
    -
    -
    250A
    -
    80mm
    52mm
    -
    -
    -
    -
    -
    -
    개당
    ₩1,202,918.00
    Schneider Electric
    100/5A
    -
    PowerLogic
    Split Core
    Current Transformer
    720 V
    100A
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    페이지 당 결과 수