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 913-9734
Référence fabricantMETSECT5CC013
33,64 €
Each
Unité
125:5 21mm Toroidal Ring - - - - - -25°C - +60°C - 65 x 44 x 30 mm -
N° de stock RS 913-9731
Référence fabricantMETSECT5CC005
29,82 €
Each
Unité
50:5 21mm Toroidal Ring - - - - - -25°C - +60°C - 65 x 44 x 30 mm -
N° de stock RS 198-4469
Référence fabricantMETSECT5DA125
129,85 €
Each
Unité
1250:5 - Tropicalise - - 1250A 5 A 94mm -25°C 90mm +60°C 87mm - -
N° de stock RS 198-4504
Référence fabricantMETSECT5MC050
112,38 €
Each
Unité
500:5 32mm Tropicalise - - 500A 5 A 95mm -25°C 70mm +60°C 65mm - -
N° de stock RS 198-4470
Référence fabricantMETSECT5DA150
135,50 €
Each
Unité
1500:5 - Tropicalise - - 1500A 5 A 94mm -25°C 90mm +60°C 87mm - -
N° de stock RS 198-4505
Référence fabricantMETSECT5MC060
114,77 €
Each
Unité
600:5 32mm Tropicalise - - 600A 5 A 95mm -25°C 70mm +60°C 65mm - -
N° de stock RS 198-4471
Référence fabricantMETSECT5DB100
173,38 €
Each
Unité
1000:5 - Tropicalise - - 1000A 5 A 160mm -25°C 99mm +60°C 78.4mm - -
N° de stock RS 198-4463
Référence fabricantMETSECT5CC010
67,45 €
Each
Unité
100:5 21mm Tropicalise - - 100A 5 A 65mm -25°C 44mm +60°C 37mm - -
N° de stock RS 198-4480
Référence fabricantMETSECT5DC300
247,91 €
Each
Unité
3000:5 - Tropicalise - - 3000A 5 A 160mm -25°C 125mm +50°C 87mm - -
N° de stock RS 198-4512
Référence fabricantMETSECT5VV600
1.154,82 €
Each
Unité
6000:5 - Tropicalise - - 6000A 5 A 242mm -25°C 175mm +50°C 110mm - -
N° de stock RS 198-4475
Référence fabricantMETSECT5DB250
212,82 €
Each
Unité
2500:5 - Tropicalise - - 2500A 5 A 160mm -25°C 99mm +60°C 78.4mm - -
N° de stock RS 198-4461
Référence fabricantMETSECT5CC004
61,29 €
Each
Unité
40:5 21mm Tropicalise - - 40A 5 A 65mm -25°C 44mm +60°C 37mm - -
Nouveau
N° de stock RS 219-8415
Référence fabricantLV480885
51,50 €
Each
Unité
150/5A - - - - - - 78mm - 60mm - - - -
Nouveau
N° de stock RS 221-1278
Référence fabricantLV432861
1.023,30 €
Each
Unité
600/5A - - - - 600A 5 A - - - - - - -
N° de stock RS 198-4497
Référence fabricantMETSECT5MB025
88,20 €
Each
Unité
250:5 26mm Tropicalise - - 250A 5 A 85mm -25°C 60mm +60°C 63mm - -
N° de stock RS 198-4477
Référence fabricantMETSECT5DB300
224,04 €
Each
Unité
3000:5 - Tropicalise - - 3000A 5 A 160mm -25°C 99mm +60°C 78.4mm - -
N° de stock RS 198-4509
Référence fabricantMETSECT5MD080
119,17 €
Each
Unité
800:5 40mm Tropicalise - - 800A 5 A 95mm -25°C 70mm +60°C 65mm - -
N° de stock RS 198-4462
Référence fabricantMETSECT5CC006
66,55 €
Each
Unité
60:5 21mm Tropicalise - - 60A 5 A 65mm -25°C 44mm +60°C 37mm - -
Nouveau
N° de stock RS 211-1871
Référence fabricantLUTC4001
88,60 €
Each
Unité
400A - Base Mounted - - 400A 1 A 170mm - 38mm - - - -
N° de stock RS 198-4473
Référence fabricantMETSECT5DB150
192,12 €
Each
Unité
1500:5 - Tropicalise - - 1500A 5 A 160mm -25°C 99mm +60°C 78.4mm - -