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.


...
Lees meer Lees minder

Filters

1 - 13 van 13 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs 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
RS-stocknr. 832-9835
FabrikantnummerL01-8500
FabrikantAlttec
24,35 €
Each
Aantal stuks
40:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
RS-stocknr. 832-9848
FabrikantnummerL01-8506
FabrikantAlttec
20,62 €
Each
Aantal stuks
100:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
RS-stocknr. 832-9867
FabrikantnummerL01-8005
FabrikantAlttec
12,45 €
Each
Aantal stuks
150:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9851
FabrikantnummerL01-8002
FabrikantAlttec
12,45 €
Each
Aantal stuks
100:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9845
FabrikantnummerL01-8510
FabrikantAlttec
20,62 €
Each
Aantal stuks
250:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
RS-stocknr. 832-9879
FabrikantnummerL01-8009
FabrikantAlttec
12,45 €
Each
Aantal stuks
250:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9863
FabrikantnummerL01-8004
FabrikantAlttec
12,45 €
Each
Aantal stuks
150:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9860
FabrikantnummerL01-8003
FabrikantAlttec
12,45 €
Each
Aantal stuks
100:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9857
FabrikantnummerL01-8001
FabrikantAlttec
12,45 €
Each
Aantal stuks
50:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9876
FabrikantnummerL01-8007
FabrikantAlttec
12,45 €
Each
Aantal stuks
200:5 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9841
FabrikantnummerL01-8508
FabrikantAlttec
16,22 €
Each
Aantal stuks
150:5 28mm Clip Fit 78.5mm 61mm 40mm - - - +40°C 78.5 x 61 x 72 mm - - -
RS-stocknr. 832-9854
FabrikantnummerL01-8000
FabrikantAlttec
12,45 €
Each
Aantal stuks
50:1 21.5mm Clip Fit 65mm 45mm 30mm - - - +40°C 65 x 45 x 67 mm - - -
RS-stocknr. 832-9839
FabrikantnummerL01-8501
FabrikantAlttec
21,28 €
Each
Aantal stuks
50:5 28mm - 78.5mm 61mm 72mm - - - +40°C - - - -