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.


...
Read more Read less

Filter

Visar 1 - 20 av 22 produkter
Resultat per sida
Beskrivning Pris Current Ratio Inner Diameter Transformer Type Overall Height Overall Width Input Current Overall Depth Output Current Minimum Temperature Maximum Temperature Dimensions For Use With Mounting Type Series
RS-artikelnummer 871-1632
Tillv. art.nrB82801C0145A050
VarumärkeEPCOS
12,143 kr
Each (In a Bag of 3)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 871-1613
Tillv. art.nrB82801B0205A100
VarumärkeEPCOS
14,13 kr
Each (In a Bag of 3)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 167-0564
Tillv. art.nrB82801C2245A200
VarumärkeEPCOS
19,693 kr
Each (On a Reel of 200)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 871-1648
Tillv. art.nrB82801C2245A200
VarumärkeEPCOS
39,12 kr
Each (In a Bag of 3)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 871-1641
Tillv. art.nrB82801C0565A100
VarumärkeEPCOS
31,193 kr
Each (In a Bag of 3)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 871-1610
Tillv. art.nrB82801B0324A040
VarumärkeEPCOS
26,16 kr
Each (In a Bag of 3)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 167-0563
Tillv. art.nrB82801C0565A100
VarumärkeEPCOS
17,849 kr
Each (On a Reel of 200)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 167-0562
Tillv. art.nrB82801C0145A050
VarumärkeEPCOS
11,817 kr
Each (On a Reel of 200)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 167-0523
Tillv. art.nrB82801A0743A030
VarumärkeEPCOS
16,142 kr
Each (On a Reel of 600)
Enheter
- - - - - 7A - - -40°C +125°C 4.7 x 3.5 x 3.5 mm - Surface Mount -
RS-artikelnummer 167-0137
Tillv. art.nrB82801B0925A200
VarumärkeEPCOS
11,97 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 167-0135
Tillv. art.nrB82801B0205A100
VarumärkeEPCOS
9,029 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 162-0255
Tillv. art.nrB82801B0504A050
VarumärkeEPCOS
9,061 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 871-1644
Tillv. art.nrB82801C1265A150
VarumärkeEPCOS
11,133 kr
Each (In a Bag of 3)
Enheter
- - - - - 40A - - -40°C +125°C 14.22 x 13.46 x 10 mm - Surface Mount -
RS-artikelnummer 871-1607
Tillv. art.nrB82801A0743A030
VarumärkeEPCOS
28,437 kr
Each (In a Bag of 3)
Enheter
- - - - - 7A - - -40°C +125°C 4.7 x 3.5 x 3.5 mm - Surface Mount -
RS-artikelnummer 871-1635
Tillv. art.nrB82801B0925A200
VarumärkeEPCOS
28,437 kr
Each (In a Bag of 3)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 167-0136
Tillv. art.nrB82801B0305A125
VarumärkeEPCOS
13,194 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 871-1626
Tillv. art.nrB82801B0803A020
VarumärkeEPCOS
23,403 kr
Each (In a Bag of 3)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 162-0292
Tillv. art.nrB82801B0803A020
VarumärkeEPCOS
11,369 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 871-1629
Tillv. art.nrB82801B0504A050
VarumärkeEPCOS
9,283 kr
Each (In a Bag of 3)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -
RS-artikelnummer 162-0254
Tillv. art.nrB82801B0324A040
VarumärkeEPCOS
11,755 kr
Each (On a Reel of 900)
Enheter
- - - - - 20A - - -40°C +125°C 8.13 x 7.11 x 5.08 mm - Surface Mount -