Current Transformers

Current transformers (CT) are devices that are used to transform the current from a high current into a lower current so that the power can then be measured and controlled. The transformers consist of a core, a primary and a secondary winding. 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.


Current transformers can perform circuit control and perform roles for safety protection and current limiting.


Current transformers are found in:


  • Generating stations,

  • Electrical substations

  • Commercial electric power distribution.

Types of Current Transformers


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.


...
Voir plus Voir moins

Filtres

Afficher 1 - 13 des 13 produits
Nombre de résultats par page
Description Prix Current Ratio Inner Diameter Transformer Type Overall Height Overall Width Overall Depth Input Current Output Current Minimum Temperature Maximum Temperature Dimensions For Use With Mounting Type Series
N° de stock RS 832-9835
Référence fabricantL01-8500
MarqueAlttec
24,35 €
Each
Unité
40:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
N° de stock RS 832-9848
Référence fabricantL01-8506
MarqueAlttec
20,62 €
Each
Unité
100:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
N° de stock RS 832-9867
Référence fabricantL01-8005
MarqueAlttec
12,45 €
Each
Unité
150:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9851
Référence fabricantL01-8002
MarqueAlttec
12,45 €
Each
Unité
100:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9879
Référence fabricantL01-8009
MarqueAlttec
12,45 €
Each
Unité
250:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9863
Référence fabricantL01-8004
MarqueAlttec
12,45 €
Each
Unité
150:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9854
Référence fabricantL01-8000
MarqueAlttec
12,45 €
Each
Unité
50:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9845
Référence fabricantL01-8510
MarqueAlttec
20,62 €
Each
Unité
250:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
N° de stock RS 832-9857
Référence fabricantL01-8001
MarqueAlttec
12,45 €
Each
Unité
50:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9876
Référence fabricantL01-8007
MarqueAlttec
12,45 €
Each
Unité
200:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9841
Référence fabricantL01-8508
MarqueAlttec
16,22 €
Each
Unité
150:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
N° de stock RS 832-9860
Référence fabricantL01-8003
MarqueAlttec
12,45 €
Each
Unité
100:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
N° de stock RS 832-9839
Référence fabricantL01-8501
MarqueAlttec
21,28 €
Each
Unité
50:5 28mm - 78.5mm 61mm 72mm - - - +40°C - - - -