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


...
Voir plus Voir moins

Filtres

Afficher 761 - 780 des 1241 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 881-7972
Référence fabricant2CSG225955R1101 CT MAX 400
MarqueABB
46,80 €
Each
Unité
- 30mm - - - - - - -5°C - +50°C - 70 x 111 x 69 mm -
N° de stock RS 914-5313
Référence fabricantCT132TRAN20A-5/10V
MarqueHOBUT
37,86 €
Each
Unité
20:1 21mm - - 15 → 30 V 20A - 65mm -15°C 45mm +50°C 30mm - -
N° de stock RS 175-6220
Référence fabricant4NC5441-2DN21
MarqueSiemens
152,10 €
Each
Unité
3000:5 - Window - - 3000A 5 A 84.1mm -30°C 112mm +55°C 127.5mm 112 x 127.5 x 84.1 mm Sentron Power Monitoring Devices
N° de stock RS 832-9839
Référence fabricantL01-8501
MarqueAlttec
21,71 €
Each
Unité
50:5 28mm - - - - - 78.5mm - 61mm +40°C 72mm - -
N° de stock RS 175-6146
Référence fabricant4NC5122-0DE21
MarqueSiemens
74,88 €
Each
Unité
200:1 20mm Window - - 200A 1 A 65.6mm -30°C 60mm +55°C 75.3mm 60 x 75.3 x 65.6 mm Sentron Power Monitoring Devices
N° de stock RS 331-339
Référence fabricantCT132M100/5-2.5/1
MarqueHOBUT
15,23 €
Each
Unité
100:5 21mm DIN Rail Mounted - - 100A 5 A 65mm -30°C 45mm +85°C 30mm - -
N° de stock RS 175-6152
Référence fabricant4NC5123-2CE21
MarqueSiemens
63,90 €
Each
Unité
250:5 - Window - - 250A 5 A 65.6mm -30°C 60mm +55°C 75.3mm 60 x 75.3 x 65.6 mm Sentron Power Monitoring Devices
Nouveau
N° de stock RS 221-0336
Référence fabricant192T4050
MarqueSocomec
37,04 €
Each
Unité
500:5 32mm - - - 500A - 88.5mm - 71mm - - - -
N° de stock RS 181-2135
Référence fabricantCSLA2DG
MarqueHoneywell
29,46 €
Each
Unité
- 15.7mm - Open Loop 6 → 12 V dc - - - - - - - - -
N° de stock RS 138-3480
Référence fabricantHO 200-S/SP30-0100
MarqueLEM
16,34 €
Each
Unité
500:1 15 x 8mm - Open Loop 4.5 → 5.5 V 500A 19 → 25 mA 30.82mm -40°C 45mm +105°C 40.8mm - -
Nouveau
N° de stock RS 221-0351
Référence fabricant192T4850
MarqueSocomec
760,96 €
Each
Unité
5000:5 - Split Core - - 5kA - 245mm - 195mm - - - -
N° de stock RS 171-8845
MarqueRS PRO
85,08 €
Each
Unité
2500:5 101 x 56mm Clip Fit - - 2500A 5 A 170mm -5°C 130mm +55°C 60mm 130 x 60 x 170 mm -
N° de stock RS 123-6716
Référence fabricantXN35-145031S000000
26,37 €
Each
Unité
60:5 31mm Base Mounted - - 60A 5 A - - - - - 105 x 38 x 87.5 mm MCCB
N° de stock RS 175-6215
Référence fabricant4NC5438-2DL21
MarqueSiemens
146,70 €
Each
Unité
2000:5 - Window - - 2000A 5 A 84.1mm -30°C 112mm +55°C 127.5mm 112 x 127.5 x 84.1 mm Sentron Power Monitoring Devices
N° de stock RS 180-9999
Référence fabricantMR-3
MarqueKEMET
7,366 €
Each (In a Box of 50)
Unité
- 11mm - - - - - - - - - - - -
N° de stock RS 919-4700
Référence fabricantLF 510-S
MarqueLEM
86,41 €
Each
Unité
800:1 - - Closed Loop ±14.25 → ±25.2 V 800A ±0.16 A 70mm -40°C 89mm +85°C 40.6mm - -
Nouveau
N° de stock RS 221-0384
Référence fabricant192Y3132
MarqueSocomec
592,86 €
Each
Unité
- - - - 400 V ac 5A 20 mA 73mm - 150mm - - - -
N° de stock RS 171-8792
MarqueRS PRO
14,90 €
Each
Unité
500:5 40 x 11mm Clip Fit - - 500A 5 A 78mm -5°C 62mm +55°C 40mm 62 x 40 x 78 mm -
N° de stock RS 210-3465
Référence fabricant3RB2906-2JG1
MarqueSiemens
166,00 €
Each
Unité
10 - 100A - Straight Through - - - - 94.1mm - 54.8mm - - - -
N° de stock RS 881-7950
Référence fabricant2CSG225895R1101 CT PRO XT 150 SELV
MarqueABB
46,80 €
Each
Unité
- 18mm - - - - - - -5°C - +50°C - 45 x 96 x 69 mm -