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 21 - 40 des 1107 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 499-5570
Référence fabricantAP 100 B420L
MarqueLEM
126,20 €
Each
Unité
100:1 18mm - - 12 → 24 V dc 100A 4 → 20 mA 69mm -20°C 67mm +60°C 55mm - -
N° de stock RS 173-0066
Référence fabricantAZ-0500
3,972 €
Each (In a Box of 84)
Unité
25:1 - - - - 25A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
N° de stock RS 775-4909
Référence fabricantAZ-0500
4,99 €
Each
Unité
500:1 - - - - 25A - - -40°C - +85°C - 19.0 x 11.5 x 21.5 mm -
N° de stock RS 533-0643
Référence fabricantCTSCM40-200/5
MarqueHOBUT
47,51 €
Each
Unité
200:5 - Clip Fit - - - - 104.5mm -30°C 116mm +80°C 35.5mm - -
N° de stock RS 537-4508
Référence fabricantAC-1015
5,168 €
Each (In a Pack of 5)
Unité
15:1 - - - - 15A - - -40°C - +120°C - 23.8 x 23.8 x 11.12 mm -
N° de stock RS 919-4690
Référence fabricantLF 310-S
MarqueLEM
69,74 €
Each
Unité
500:1 - - Closed Loop ±11.4 → ±21 V 500A ±0.25 A 56.4mm -40°C 68mm +85°C 26.3mm - -
N° de stock RS 499-5362
Référence fabricantLTSR 15-NP
MarqueLEM
14,82 €
Each
Unité
48:1 3.2mm - Closed Loop 5 V 48A - 24mm -40°C 22.2mm +85°C 10mm - -
N° de stock RS 257-802
Référence fabricantCT173M150/5-2.5/1-001
MarqueHOBUT
16,49 €
Each
Unité
150:5 40mm Base Mounted - - 150A 5 A 95mm -30°C 70mm +85°C 55mm - -
N° de stock RS 313-839
Référence fabricantCT173M120/5-2.5/1-002
MarqueHOBUT
16,20 €
Each
Unité
120:5 40mm Base Mounted - - 120A 5 A 95mm -30°C 70mm +85°C 55mm - -
N° de stock RS 331-597
Référence fabricantCT132M40/5-1/3
MarqueHOBUT
14,09 €
Each
Unité
40:5 21mm DIN Rail Mounted - - 40A 5 A 65mm -30°C 45mm +85°C 30mm - -
N° de stock RS 198-841
Référence fabricantAT 5 B5
MarqueLEM
53,85 €
Each
Unité
5:1 16mm - - - 5A - 67mm -20°C 44.5mm +60°C 36.5mm - -
N° de stock RS 331-474
Référence fabricantCT132M50/5-1/1
MarqueHOBUT
14,09 €
Each
Unité
50:5 21mm DIN Rail Mounted - - 50A 5 A 65mm -30°C 45mm +85°C 30mm - -
N° de stock RS 881-7910
Référence fabricantCTPROXT100
MarqueABB
31,03 €
Each
Unité
- 18mm - - - - - - -5°C - +50°C - 45 x 96 x 69 mm -
N° de stock RS 106-8532
Référence fabricant56100C
1,352 €
Each (In a Tube of 25)
Unité
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
N° de stock RS 666-8182
Référence fabricantCASR 6-NP
MarqueLEM
12,96 €
Each
Unité
6:1 - - Closed Loop 5.25 V 6A - 16.5mm -40°C 21.91mm +85°C 13.4mm - -
N° de stock RS 497-209
Référence fabricantAT 50 B420L
MarqueLEM
83,13 €
Each
Unité
50:1 16mm - - 20 → 30 V dc 50A 4 → 20 mA 67mm -20°C 44.5mm +60°C 36.5mm - -
N° de stock RS 497-388
Référence fabricantAT 150 B420
MarqueLEM
101,58 €
Each
Unité
150:1 16mm - - 20 → 30 V dc 150A 4 → 20 mA 67mm -20°C 44.5mm +60°C 36.5mm - -
N° de stock RS 537-4520
Référence fabricantAC-1020
3,16 €
Each (In a Pack of 5)
Unité
20:1 - - - - 20A - - -40°C - +120°C - 23.8 x 23.8 x 11.12 mm -
N° de stock RS 497-164
Référence fabricantCT 0.4P
MarqueLEM
71,33 €
Each
Unité
800:1 11mm - - 15 V 800A - 30mm -20°C 30mm +85°C 20mm - -
N° de stock RS 446-0563
Référence fabricantAKR 5 B420L
MarqueLEM
354,05 €
Each
Unité
5:1 21.7mm - - 24 V dc, 150 V ac 5A 4 → 20 mA 57.2mm -20°C 89.7mm +50°C 30mm - -