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


...
Read more Read less

Filters

Viewing 1 - 20 of 28 products
Results per page
Description Price 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 Stock No. 106-8528
Mfr. Part No.53150C
TWD29.20
Each (On a Reel of 1000)
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 715-7061
Mfr. Part No.56100C
TWD60.00
Each
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 106-8532
Mfr. Part No.56100C
TWD53.60
Each (In a Tube of 25)
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7049
Mfr. Part No.53150C
TWD37.00
Each
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 106-8535
Mfr. Part No.56T200C
TWD53.60
Each (In a Tube of 25)
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7071
Mfr. Part No.56T200C
TWD55.00
Each
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 106-8537
Mfr. Part No.56T100C
TWD53.60
Each (In a Tube of 25)
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 106-8527
Mfr. Part No.53200C
TWD29.20
Each (On a Reel of 1000)
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 715-7024
Mfr. Part No.53030C
TWD62.00
Each
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 715-7043
Mfr. Part No.53200C
TWD60.00
Each
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 170-9247
Mfr. Part No.53030C
TWD29.20
Each (On a Reel of 1000)
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 715-7077
Mfr. Part No.56T100C
TWD57.00
Each
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 106-8816
Mfr. Part No.53100C
TWD28.10
Each (On a Reel of 1000)
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 106-8529
Mfr. Part No.54100C
TWD48.80
Each (On a Reel of 450)
units
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS Stock No. 715-7046
Mfr. Part No.53125C
TWD60.00
Each
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -
RS Stock No. 106-8533
Mfr. Part No.56200C
TWD53.60
Each (In a Tube of 25)
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 106-8538
Mfr. Part No.56T300C
TWD53.60
Each (In a Tube of 25)
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7068
Mfr. Part No.56050C
TWD55.00
Each
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7074
Mfr. Part No.56300C
TWD57.00
Each
units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 715-7037
Mfr. Part No.53100C
TWD64.00
Each
units
10:1 - - - - 10A - - -40°C - +125°C - 8.3 x 7.2 x 5.4 mm -