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.

    1737 표시되는 제품 Current Transformers

    개당
    ₩74,030.64
    Phoenix Contact
    -
    33mm
    PACT MCR-V2
    Window
    Current Transformer
    -
    0 → 200A
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 106-8533
    • 제조사 부품 번호 56200C
    개당가격(25개가 1튜브안에)
    ₩2,485.36
    Murata Power Solutions
    10:1
    -
    5600
    -
    -
    -
    10A
    -
    -
    8.89mm
    20.19mm
    -40°C
    +85°C
    -
    -
    Through Hole
    • RS 제품 번호 224-7696
    • 제조사 부품 번호 CTV4X200A333MV
    개당
    ₩143,387.60
    Carlo Gavazzi
    -
    21mm
    CTV
    Split Core
    -
    600 V ac
    -
    -
    78mm
    50mm
    -
    -
    -
    -
    -
    -
    개당
    ₩117,968.12
    Phoenix Contact
    -
    52mm
    PACT MCR-V2
    Window
    Current Transformer
    -
    0 → 800A
    1 A
    -
    -
    -
    -
    -
    -
    -
    -
    개당
    ₩33,809.92
    RS PRO
    600:1
    40 x 11mm
    -
    -
    -
    -
    -
    -
    78mm
    62mm
    40mm
    -
    -
    -
    -
    -
    • RS 제품 번호 222-4405
    • 제조사 부품 번호 ROG4X1002M2503X
    개당
    ₩1,076,694.80
    Carlo Gavazzi
    -
    90mm
    ROG4X
    Rogowski Coil
    Closed Loop
    -
    4kA
    -
    250mm
    90mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 221-0367
    • 제조사 부품 번호 192T9797
    개당
    ₩319,122.48
    Socomec
    2500:5
    -
    192T
    -
    -
    -
    2.5kA
    -
    175mm
    100mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 223-8016
    • 제조사 부품 번호 CTD2X4005AXXX
    개당
    ₩32,881.20
    Carlo Gavazzi
    400:5
    24mm
    CTD2X
    -
    Closed Loop
    -
    400A
    5 A
    104mm
    56mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 224-7681
    • 제조사 부품 번호 CTA5X300A5A
    개당
    ₩222,723.60
    Carlo Gavazzi
    300:5
    24mm
    CTA
    Split Core
    -
    600 V ac
    -
    -
    85.5mm
    46mm
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 223-8019
    • 제조사 부품 번호 CTD3X4005AXXX
    개당
    ₩82,475.60
    Carlo Gavazzi
    400:5
    41mm
    CTD3X
    -
    Closed Loop
    -
    400A
    5 A
    127mm
    77mm
    -
    -
    -
    -
    -
    -
    개당
    ₩30,550.00
    LEM
    500:1
    20.4 x 10.4mm
    HASS
    -
    Open Loop
    5 V
    500A
    150 mArms
    30mm
    40mm
    26.6mm
    -40°C
    +85°C
    -
    -
    Panel Mount
    개당
    ₩260,060.40
    LEM
    150:1
    18mm
    APR
    -
    -
    12 → 24 V dc
    10 A, 25 A, 50A
    4 → 20 mA
    69mm
    55mm
    67mm
    -20°C
    +60°C
    -
    -
    DIN Rail
    • RS 제품 번호 231-9904
    • 제조사 부품 번호 2CSG202150R1101 R4M-200
    개당
    ₩537,266.40
    ABB
    -
    200mm
    R4M-200
    Rogowski Coil
    -
    -
    -
    -
    0.39mm
    0.03mm
    0.25mm
    -
    -
    -
    -
    -
    • RS 제품 번호 104-835
    • 제조사 부품 번호 LV 25-600
    개당
    ₩158,623.12
    LEM
    -
    -
    LV25xx
    Closed Loop Hall Effect
    Closed Loop
    12 → 15 V
    25mA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 223-8012
    • 제조사 부품 번호 CTD1X605AXXX
    개당
    ₩50,402.80
    Carlo Gavazzi
    60:5
    23.3mm
    CTD1X
    -
    Closed Loop
    -
    60A
    5 A
    83mm
    46mm
    -
    -
    -
    -
    -
    -
    개당
    ₩145,211.20
    LEM
    500:1
    25.5mm
    LF
    -
    Closed Loop
    12 → 15 V
    500A
    150 mArms
    57.4mm
    67.3mm
    15.7mm
    -25°C
    +70°C
    -
    -
    Panel Mount
    • RS 제품 번호 286-361
    • 제조사 부품 번호 LV 25-P
    개당
    ₩146,903.20
    LEM
    14:1
    -
    LV
    -
    Closed Loop
    12 → 15 V
    14A
    25 mA
    16.45mm
    26mm
    29.2mm
    0°C
    +70°C
    -
    -
    PCB Mount
    • RS 제품 번호 522-008
    • 제조사 부품 번호 HAT 600-S
    개당
    ₩100,862.00
    LEM
    1800:1
    40.5 x 30.5mm
    HAT
    -
    Open Loop
    15 V
    600A
    -
    65mm
    90mm
    40mm
    -10°C
    +80°C
    -
    -
    Busbar, Plug In
    • RS 제품 번호 104-841
    • 제조사 부품 번호 LV 25-1200
    개당
    ₩162,283.48
    LEM
    -
    -
    LV25xx
    Closed Loop Hall Effect
    Closed Loop
    12 → 15 V
    25mA
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS 제품 번호 198-813
    • 제조사 부품 번호 AT 5 B10
    개당
    ₩96,895.20
    LEM
    5:1
    16mm
    AT
    -
    -
    -
    5A
    -
    67mm
    44.5mm
    36.5mm
    -20°C
    +60°C
    -
    -
    Cable Tie
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