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. 399-7317
FabrikantnummerAS-103
FabrikantNuvotem Talema
€ 1,79
Each
Aantal stuks
15:1 - - - - 15A - - -40°C - +120°C - 17.2 x 20.4 x 9.53 mm -
RS-stocknr. 400-8575
FabrikantnummerAS-100
FabrikantNuvotem Talema
€ 3,72
Each
Aantal stuks
15:1 - - - - 15A - - -40°C - +120°C - 17.2 x 20.4 x 9.53 mm -
RS-stocknr. 729-5520
FabrikantnummerAC-1200
FabrikantNuvotem Talema
€ 8,21
Each
Aantal stuks
200:1 - - - - 200A - - -40°C - +120°C - 55.6 x 20.6 x 55.6 mm -
RS-stocknr. 173-0060
FabrikantnummerAC-1200
FabrikantNuvotem Talema
€ 7,239
Each (In a Box of 27)
Aantal stuks
200:1 - - - - 200A - - -40°C - +120°C - 55.6 x 20.6 x 55.6 mm -
RS-stocknr. 173-0068
FabrikantnummerAZ-1000
FabrikantNuvotem Talema
€ 4,267
Each (In a Box of 84)
Aantal stuks
50:1 - - - - 50A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
RS-stocknr. 173-0049
FabrikantnummerAC-1030
FabrikantNuvotem Talema
€ 2,973
Each (In a Box of 120)
Aantal stuks
30:1 - - - - 30A - - -40°C - +120°C - 30.2 x 14.3 x 30.2 mm -
RS-stocknr. 729-5501
FabrikantnummerAC-1030
FabrikantNuvotem Talema
€ 3,79
Each
Aantal stuks
30:1 - - - - 30A - - -40°C - +120°C - 30.2 x 14.3 x 30.2 mm -
RS-stocknr. 775-4912
FabrikantnummerAZ-1000
FabrikantNuvotem Talema
€ 5,27
Each
Aantal stuks
50:1 - - - - 50A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
RS-stocknr. 819-9779
Fabrikantnummer90AS
FabrikantEfergy
€ 11,22
Each
Aantal stuks
- 12mm Split Core - - - - - - - - - - Data Loggers/DAS, Digital or Analog Meters, DMMs, Recorders
RS-stocknr. 537-4508
FabrikantnummerAC-1015
FabrikantNuvotem Talema
€ 5,272
Each (In a Pack of 5)
Aantal stuks
15:1 - - - - 15A - - -40°C - +120°C - 23.8 x 23.8 x 11.12 mm -
RS-stocknr. 537-4485
FabrikantnummerAC-1005
FabrikantNuvotem Talema
€ 3,224
Each (In a Pack of 5)
Aantal stuks
5:1 - - - - 5A - - -40°C - +120°C - 23.8 x 23.8 x 11.12 mm -
RS-stocknr. 173-0066
FabrikantnummerAZ-0500
FabrikantNuvotem Talema
€ 3,972
Each (In a Box of 84)
Aantal stuks
500:1 - - - - 25A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
RS-stocknr. 775-4909
FabrikantnummerAZ-0500
FabrikantNuvotem Talema
€ 4,99
Each
Aantal stuks
500:1 - - - - 25A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
RS-stocknr. 497-198
FabrikantnummerHASS 100-S
FabrikantLEM
€ 16,39
Each
Aantal stuks
300:1 20.4 x 10.4mm - Open Loop 5 V 300A - 30mm -40°C 40mm +85°C 30mm - -
RS-stocknr. 775-4956
FabrikantnummerAP-2000
FabrikantNuvotem Talema
€ 3,28
Each
Aantal stuks
15:1 - - - - 15A - - -40°C - +85°C - 17.2 x 9.53 x 20.4 mm -
RS-stocknr. 532-9205
FabrikantnummerHTFS 200-P
FabrikantLEM
€ 17,99
Each
Aantal stuks
300:1 22mm - Open Loop 5 V 300A - 46mm -40°C 40mm +105°C 17mm - -
RS-stocknr. 173-0059
FabrikantnummerAP-2000
FabrikantNuvotem Talema
€ 2,887
Each (In a Box of 250)
Aantal stuks
15:1 - - - - 15A - - -40°C - +85°C - 17.2 x 9.53 x 20.4 mm -
RS-stocknr. 123-6716
FabrikantnummerXN35-145031S000000
FabrikantSifam Tinsley
€ 26,37
Each
Aantal stuks
60:5 31mm Base Mounted - - 60A 5 A - - - - - 105 x 38 x 87.5 mm MCCB
RS-stocknr. 819-9798
Fabrikantnummer140AS
FabrikantEfergy
€ 13,93
Each
Aantal stuks
- 19mm - - - - - - - - - - - Oscilloscopes
RS-stocknr. 499-5362
FabrikantnummerLTSR 15-NP
FabrikantLEM
€ 15,00
Each
Aantal stuks
48:1 3.2mm - Closed Loop 5 V 48A - 24mm -40°C 22.2mm +85°C 10mm - -