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.


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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. 881-7944
Fabrikantnummer2CSG225865R1101
FabrikantABB
€ 22,55
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-7950
FabrikantnummerCTPROXT150SELV
FabrikantABB
€ 26,22
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-7954
FabrikantnummerCTPROXT200SELV
FabrikantABB
€ 26,22
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-8004
FabrikantnummerCTMAX800SELV
FabrikantABB
€ 35,44
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX SELV
RS-stocknr. 881-7932
FabrikantnummerCTPROXT40SELV
FabrikantABB
€ 22,55
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-7938
FabrikantnummerCTPROXT400
FabrikantABB
€ 26,22
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT
RS-stocknr. 881-7916
FabrikantnummerCTPROXT80
FabrikantABB
€ 18,78
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT
RS-stocknr. 881-7948
FabrikantnummerCTPROXT80SELV
FabrikantABB
€ 22,55
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-8008
FabrikantnummerCTMAX1000SELV
FabrikantABB
€ 35,44
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX SELV
RS-stocknr. 881-7982
FabrikantnummerCTMAX1000
FabrikantABB
€ 29,56
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX
RS-stocknr. 881-7994
FabrikantnummerCTMAX400SELV
FabrikantABB
€ 35,44
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX SELV
RS-stocknr. 881-7963
FabrikantnummerCTPROXT250SELV
FabrikantABB
€ 26,22
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-7985
FabrikantnummerCTMAX600
FabrikantABB
€ 29,56
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX
RS-stocknr. 881-7941
FabrikantnummerCTPROXT50SELV
FabrikantABB
€ 22,55
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV
RS-stocknr. 881-8001
Fabrikantnummer2CSG226035R1101
FabrikantABB
€ 35,44
Each
Aantal stuks
- 30mm - - - - - - -5°C +50°C 70 x 111 x 69 mm - BusBar, DIN Rail CT MAX SELV
RS-stocknr. 881-7935
FabrikantnummerCTPROXT300
FabrikantABB
€ 21,89
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT
RS-stocknr. 291-1233
Fabrikantnummer01.000158.222
FabrikantABB
€ 43,12
Each
Aantal stuks
- 26mm - 82mm 80mm 38mm - - -10°C +60°C - - - -
RS-stocknr. 881-7910
FabrikantnummerCTPROXT100
FabrikantABB
€ 21,89
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT
RS-stocknr. 881-7913
FabrikantnummerCTPROXT60
FabrikantABB
€ 18,78
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT
RS-stocknr. 881-7960
FabrikantnummerCTPROXT400SELV
FabrikantABB
€ 31,55
Each
Aantal stuks
- 18mm - - - - - - -5°C +50°C 45 x 96 x 69 mm - BusBar, DIN Rail CT PRO XT SELV