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. 715-7077
Fabrikantnummer56T100C
€ 1,38
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 106-8537
Fabrikantnummer56T100C
€ 1,352
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 106-8532
Fabrikantnummer56100C
€ 1,352
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7061
Fabrikantnummer56100C
€ 1,38
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7055
Fabrikantnummer54100C
€ 2,15
Each
Aantal stuks
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS-stocknr. 715-7068
Fabrikantnummer56050C
€ 1,41
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7046
Fabrikantnummer53125C
€ 0,55
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS-stocknr. 715-7024
Fabrikantnummer53030C
€ 0,59
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS-stocknr. 715-7049
Fabrikantnummer53150C
€ 0,54
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS-stocknr. 715-7052
Fabrikantnummer54050C
€ 1,95
Each
Aantal stuks
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS-stocknr. 106-8534
Fabrikantnummer56050C
€ 1,384
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7065
Fabrikantnummer56200C
€ 1,37
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 106-8533
Fabrikantnummer56200C
€ 1,332
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7071
Fabrikantnummer56T200C
€ 1,37
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 106-8535
Fabrikantnummer56T200C
€ 1,332
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7080
Fabrikantnummer56T300C
€ 1,37
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 106-8538
Fabrikantnummer56T300C
€ 1,332
Each (In a Tube of 25)
Aantal stuks
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS-stocknr. 715-7043
Fabrikantnummer53200C
€ 1,51
Each
Aantal stuks
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS-stocknr. 170-9250
Fabrikantnummer54050C
€ 1,123
Each (On a Reel of 450)
Aantal stuks
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS-stocknr. 106-8816
Fabrikantnummer53100C
€ 0,76
Each (On a Reel of 1000)
Aantal stuks
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -