Current Transformers

Current transformers or (CT’s) are instruments that are used to transform the current from a high current into a lower current so that the power can then be used for measuring and controlling. The transformers consist of a core, a primary and a secondary winding.RS Components offer an extensive range of highly accurate CT’s 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 transformers". Once the current has been reduced it can be safely monitored and measured using an ammeter.

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 turns 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 transformer?

CT's are used in a wide range of industrial and commercial measurement applications. Some of the most common are:Generating stationsElectrical substationsCommercial electric power distributionElectrical panels


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Description Prix Current Ratio Bore Size Transformer Type Sensor Technology Supply Voltage Input Current Output Current Overall Height Minimum Temperature Overall Width Maximum Temperature Overall Depth Dimensions For Use With
N° de stock RS 2508933560
Référence fabricant37020
MarqueSimpson
58,08 €
Each
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N° de stock RS 2508934434
Référence fabricant01306
MarqueSimpson
62,45 €
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N° de stock RS 2508933576
Référence fabricant37021
MarqueSimpson
60,01 €
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N° de stock RS 2508934462
Référence fabricant01299
MarqueSimpson
67,60 €
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N° de stock RS 2508934282
Référence fabricant02304
MarqueSimpson
122,66 €
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N° de stock RS 2508933611
Référence fabricant37025
MarqueSimpson
77,34 €
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N° de stock RS 2508933627
Référence fabricant37000
MarqueSimpson
307,82 €
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N° de stock RS 2508933649
Référence fabricant37003
MarqueSimpson
322,57 €
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N° de stock RS 2509299928
Référence fabricantACST-261-1
1,48 €
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N° de stock RS 2508935538
Référence fabricant37027
MarqueSimpson
141,07 €
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N° de stock RS 2508935544
Référence fabricant37028
MarqueSimpson
167,08 €
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N° de stock RS 2508935566
Référence fabricant37029
MarqueSimpson
151,46 €
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N° de stock RS 2508933655
Référence fabricant37004
MarqueSimpson
335,35 €
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N° de stock RS 2508935572
Référence fabricant37030
MarqueSimpson
124,14 €
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N° de stock RS 2508935522
Référence fabricant37026
MarqueSimpson
158,48 €
Each
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