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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Omschrijving Prijs 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
RS-stocknr. 180-9997
FabrikantnummerMR-1
FabrikantKEMET
5,307 €
Each (In a Box of 80)
Aantal stuks
- 7.2mm - - - - - - - - - - - -
RS-stocknr. 181-0075
FabrikantnummerMR-1
FabrikantKEMET
5,40 €
Each
Aantal stuks
- 7.2mm - - - - - - - - - - - -
RS-stocknr. 205-5834
FabrikantnummerMR/C-01B
FabrikantKEMET
3,531 €
Each (In a Box of 120)
Aantal stuks
1:1000 6mm - - - 15A 15 μA 6.7mm - 19mm - - - -
RS-stocknr. 181-0083
FabrikantnummerMR-1-P5
FabrikantKEMET
4,48 €
Each
Aantal stuks
- 7.4mm - - - - - - - - - - - -
RS-stocknr. 205-5835
FabrikantnummerMR/C-01B
FabrikantKEMET
7,71 €
Each
Aantal stuks
1:1000 6mm - - - 15A 15 μA 6.7mm - 19mm - - - -
RS-stocknr. 181-0081
FabrikantnummerMR-4
FabrikantKEMET
9,12 €
Each
Aantal stuks
- 16.5mm - - - - - - - - - - - -
RS-stocknr. 180-9998
FabrikantnummerMR-2
FabrikantKEMET
8,085 €
Each (In a Box of 80)
Aantal stuks
- 8.9mm - - - - - - - - - - - -
RS-stocknr. 181-0085
FabrikantnummerMR/C-01
FabrikantKEMET
2,10 €
Each
Aantal stuks
- 6mm - - - - - - - - - - - -
RS-stocknr. 181-0003
FabrikantnummerMR/C-01
FabrikantKEMET
2,065 €
Each (In a Box of 120)
Aantal stuks
- 6mm - - - - - - - - - - - -
RS-stocknr. 180-9999
FabrikantnummerMR-3
FabrikantKEMET
7,366 €
Each (In a Box of 50)
Aantal stuks
- 11mm - - - - - - - - - - - -
RS-stocknr. 181-0002
FabrikantnummerMR-1-P5
FabrikantKEMET
4,405 €
Each (In a Box of 150)
Aantal stuks
- 7.4mm - - - - - - - - - - - -
RS-stocknr. 181-0001
FabrikantnummerMR-4
FabrikantKEMET
8,942 €
Each (In a Box of 50)
Aantal stuks
- 16.5mm - - - - - - - - - - - -
RS-stocknr. 181-0079
FabrikantnummerMR-3
FabrikantKEMET
7,50 €
Each
Aantal stuks
- 11mm - - - - - - - - - - - -
RS-stocknr. 181-0077
FabrikantnummerMR-2
FabrikantKEMET
11,02 €
Each
Aantal stuks
- 8.9mm - - - - - - - - - - - -