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.


...
Voir plus Voir moins

Filtres

Afficher 1 - 20 des 769 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 775-4912
Référence fabricantAZ-1000
5,07 €
Each
Unité
- - - - - - 50A - -40°C +85°C 19.0 x 11.5 x 21.5 mm - Flying Lead -
N° de stock RS 173-0068
Référence fabricantAZ-1000
4,546 €
Each (In a Box of 84)
Unité
- - - - - - 50A - -40°C +85°C 19.0 x 11.5 x 21.5 mm - Flying Lead -
N° de stock RS 173-0049
Référence fabricantAC-1030
3,168 €
Each (In a Box of 120)
Unité
- - - - - - 30A - -40°C +120°C 30.2 x 14.3 x 30.2 mm - Through Hole -
N° de stock RS 729-5501
Référence fabricantAC-1030
3,51 €
Each
Unité
- - - - - - 30A - -40°C +120°C 30.2 x 14.3 x 30.2 mm - Through Hole -
N° de stock RS 819-9779
Référence fabricant90AS
MarqueEfergy
10,78 €
Each
Unité
- 12mm Split Core - - - - - - - - Data Loggers/DAS, Digital or Analog Meters, DMMs, Recorders - -
N° de stock RS 775-2714
Référence fabricantCTSCMICRO19-200/5-T-S
MarqueHOBUT
50,06 €
Each
Unité
200:5 - Split Core 78mm 58mm 49mm - - -30°C +55°C - - - -
N° de stock RS 819-9798
Référence fabricant140AS
MarqueEfergy
13,66 €
Each
Unité
- 19mm - - - - - - - - - Oscilloscopes - -
N° de stock RS 775-4909
Référence fabricantAZ-0500
4,71 €
Each
Unité
- - - - - - 25A - -40°C +85°C 19.0 x 11.5 x 21.5 mm - Flying Lead -
N° de stock RS 173-0066
Référence fabricantAZ-0500
4,232 €
Each (In a Box of 84)
Unité
- - - - - - 25A - -40°C +85°C 19.0 x 11.5 x 21.5 mm - Flying Lead -
N° de stock RS 537-4536
Référence fabricantAC-1040
3,61 €
Each
Unité
- - - - - - 40A - -40°C +120°C 34.9 x 14.3 x 34.9 mm - PCB Mount -
N° de stock RS 331-474
Référence fabricantCT132M50/5-1/1
MarqueHOBUT
14,09 €
Each
Unité
50:5 21mm DIN Rail Mounted 65mm 45mm 30mm - - -30°C +85°C - - - -
N° de stock RS 537-4508
Référence fabricantAC-1015
2,984 €
Each (In a Pack of 5)
Unité
- - - - - - 15A - -40°C +120°C 23.8 x 23.8 x 11.12 mm - PCB Mount -
N° de stock RS 533-0643
Référence fabricantCTSCM40-200/5
MarqueHOBUT
47,51 €
Each
Unité
200:5 - Clip Fit 104.5mm 116mm 35.5mm - - -30°C +80°C - - - -
N° de stock RS 313-839
Référence fabricantCT173M120/5-2.5/1-002
MarqueHOBUT
16,20 €
Each
Unité
120:5 40mm Base Mounted 95mm 70mm 55mm - - -30°C +85°C - - - -
N° de stock RS 257-802
Référence fabricantCT173M150/5-2.5/1-001
MarqueHOBUT
16,49 €
Each
Unité
150:5 40mm Base Mounted 95mm 70mm 55mm - - -30°C +85°C - - - -
N° de stock RS 331-597
Référence fabricantCT132M40/5-1/3
MarqueHOBUT
14,09 €
Each
Unité
40:5 21mm DIN Rail Mounted 65mm 45mm 30mm - - -30°C +85°C - - - -
N° de stock RS 715-7061
Référence fabricant56100C
1,38 €
Each
Unité
- - - - - - 10A - -40°C +85°C 16.79 x 8.89 x 20.19 mm - Through Hole -
N° de stock RS 775-4903
Référence fabricantAZ-0750
4,96 €
Each
Unité
- - - - - - 40A - -40°C +85°C 19.0 x 11.5 x 21.5 mm - Flying Lead -
N° de stock RS 106-8532
Référence fabricant56100C
1,352 €
Each (In a Tube of 25)
Unité
- - - - - - 10A - -40°C +85°C 16.79 x 8.89 x 20.19 mm - Through Hole -
N° de stock RS 886-2115
Référence fabricantXW01-105081S000000
17,94 €
Each
Unité
30:5 - Base Mounted - - - - - - - 62 x 40 x 78 mm - Surface Mount Omega XMER