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.

    1665 표시되는 제품 Current Transformers

    개당
    ₩198,022.28
    Phoenix Contact
    -
    85mm
    PACT MCR-V2
    Window
    Current Transformer
    -
    0 → 2000A
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 243-0025
    • 제조사 부품 번호 XCTB 31.35 150/5A 2,5VA Kl.0,5s
    개당
    ₩481,105.16
    GILGEN Muller & Weigert
    150:5
    25.7mm
    XCTB
    Base Mounted
    Current Transformer
    -
    150A
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 224-7685
    • 제조사 부품 번호 CTA6X400A5A
    개당
    ₩257,033.60
    Carlo Gavazzi
    400:5
    36mm
    CTA
    Split Core
    -
    600 V ac
    -
    -
    84mm
    57mm
    -
    -
    -
    -
    -
    -
    개당
    ₩524,912.92
    GILGEN Muller & Weigert
    600:1
    60mm
    DACT
    Current Transformer
    Current Transformer
    -
    600A
    3.33 mA
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 260-8578
    • 제조사 부품 번호 FG-R01-4A
    1 박스 1개
    ₩56,945.20
    KEMET
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    PCB Monut
    • RS 제품 번호 497-182
    • 제조사 부품 번호 HASS 50-S
    개당
    ₩35,626.00
    LEM
    50:1
    20.4 x 10.4mm
    HASS
    -
    Open Loop
    5 V
    50A
    -
    30mm
    40mm
    30mm
    -40°C
    +85°C
    -
    -
    Panel Mount
    • RS 제품 번호 279-2446
    • 제조사 부품 번호 855-305/250-501
    개당
    ₩50,872.80
    WAGO
    250:5
    -
    855
    Current Transformer
    Current Transformer
    -
    250A
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 522-018
    • 제조사 부품 번호 HAT 500-S
    개당
    ₩98,474.40
    LEM
    1500:1
    40.5 x 30.5mm
    HAT
    -
    Open Loop
    15 V
    500A
    -
    65mm
    90mm
    52mm
    -10°C
    +80°C
    -
    -
    Busbar, Plug In
    • RS 제품 번호 497-091
    • 제조사 부품 번호 HTR 50-SB
    개당
    ₩246,204.80
    LEM
    100:1
    21mm
    HTR
    -
    Open Loop
    12 → 15 V
    50A
    -
    69mm
    46mm
    20mm
    -10°C
    +70°C
    -
    -
    Busbar, Panel Mount
    • RS 제품 번호 731-5267
    • 제조사 부품 번호 HTA 200-S
    개당
    ₩123,685.20
    LEM
    200:1
    32mm
    HTA
    -
    Open Loop
    ±15 V
    200A
    -
    70mm
    17mm
    27.5mm
    -25°C
    +85°C
    -
    -
    Panel Mount
    개당
    ₩729,033.92
    Socomec
    -
    -
    CTA-VA4
    Current Transformer
    -
    -
    50A
    0.004 → 0.02 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 286-311
    • 제조사 부품 번호 LA 25-NP
    개당
    ₩56,306.00
    LEM
    36:1
    -
    LA
    -
    Closed Loop
    15 V
    36A
    25 mArms
    16.45mm
    26mm
    29.2mm
    -40°C
    +85°C
    -
    -
    PCB Mount
    • RS 제품 번호 246-6464
    • 제조사 부품 번호 DM2TA0250
    개당
    ₩213,295.40
    Lovato
    250:5
    80 x 80mm
    DM
    Split Core
    Current Transformer
    -
    -
    5 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 288-0899
    • 제조사 부품 번호 2CCA880129R0001
    개당
    ₩163,778.08
    ABB
    40A
    -
    2CCA880129R
    Current Transformer
    -
    690 V ac
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩436,030.28
    LEM
    -
    -
    AHR
    ASIC Open Loop Hall Effect
    Open Loop
    20 → 50 V
    800A
    4 → 20 mA
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩637,846.40
    Phoenix Contact
    -
    -
    PACT RCP
    Rogowski Coil
    Closed Loop
    -
    4000A
    0 → 21 mA
    120.5mm
    6.2mm
    110.5mm
    -40 °C, -30°C
    +70 °C, +80°C
    -
    -
    DIN Rail
    개당
    ₩293,919.20
    Carlo Gavazzi
    200:5
    26 / 26 x 32mm
    CTD5S
    Split Core
    Open Loop
    -
    200A
    5 A
    112mm
    83mm
    -
    -
    -
    -
    -
    -
    개당가격(30개가 1박스안에)
    ₩55,416.76
    KEMET
    4A
    12.6mm
    FG
    Fluxgate
    Open Loop
    5 V
    +/-50mA
    6 → 20 mA
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 175-6140
    • 제조사 부품 번호 4NC5121-0CC21
    개당
    ₩130,265.20
    Siemens
    150:1
    -
    Sentron
    Window
    -
    -
    150A
    1 A
    65.6mm
    60mm
    75.3mm
    -30°C
    +55°C
    -
    -
    Chassis Mount
    • RS 제품 번호 221-0364
    • 제조사 부품 번호 192T9675
    개당
    ₩157,611.68
    Socomec
    750:5
    85mm
    192T
    -
    -
    -
    750A
    -
    184.5mm
    172mm
    -
    -
    -
    -
    -
    -
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