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


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กำลังดูสินค้า 41 - 60 รายการจาก 1281 รายการ / Viewing 41 - 60 of 1281 products
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รายละเอียดสินค้า / Description ราคา / Price 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
RS Stock No. 207-3016
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HY 5-P
Brand :LEM
THB705.69
Each
Units
15:1 0.7mm - Open Loop 12 → 15 V 5A - 23mm -10°C 36mm +80°C 12mm - -
RS Stock No. 913-9738
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.METSECT5CC020
THB1,809.04
Each
Units
200:5 21mm Toroidal Ring - - - - - -25°C - +60°C - 65 x 44 x 30 mm -
RS Stock No. 301-9495
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HAS 100S
Brand :LEM
THB985.28
Each
Units
300:1 20.4 x 10.4mm - Open Loop 15 V 300A - 30mm -10°C 40mm +80°C 30mm - -
RS Stock No. 321-6292
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LAH 50-P
Brand :LEM
THB680.38
Each
Units
50:1 - - Closed Loop 12 → 15 V 50A 25 mArms 21mm -25°C 33.3mm +85°C 14.93mm - -
RS Stock No. 833-2740
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DM2T0100
Brand :Lovato
THB787.10
Each
Units
100:5 23mm Base Mounted - - - - 65.5mm -25°C 52mm +50°C 46.5mm - -
RS Stock No. 715-7071
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.56T200C
THB57.94
Each
Units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 497-221
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LA 25-P
Brand :LEM
THB2,367.08
Each
Units
55:1 - - Closed Loop 12 → 15 V 55A 25 mArms 27.2mm -25°C 36.5mm +85°C 14.45mm - -
RS Stock No. 715-7055
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.54100C
THB91.19
Each
Units
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS Stock No. 331-474
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CT132M50/5-1/1
Brand :HOBUT
THB546.02
Each
Units
50:5 21mm DIN Rail Mounted - - 50A 5 A 65mm -30°C 45mm +85°C 30mm - -
RS Stock No. 106-8529
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.54100C
THB52.313
Each (On a Reel of 450)
Units
15:1 - - - - 15A - - -40°C - +125°C - 10.8 x 9 x 8.2 mm -
RS Stock No. 446-0642
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DK 400 B420
Brand :LEM
THB18,548.59
Each
Units
400:1 21.7mm - - 20 → 50 V dc, 22 → 38 V ac 400A 4 → 20 mA 57.2mm -20°C 89.7mm +50°C 30mm - -
RS Stock No. 667-3474
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CSNR151
Brand :Honeywell
THB2,070.51
Each
Units
200:1 - - Closed Loop 12 → 15 V dc 200A 62.5 mA 29.6mm -40°C 36.6mm +85°C 14.45mm - -
RS Stock No. 451-1380
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LF 505S
Brand :LEM
THB4,463.65
Each
Units
800:1 30.2mm - Closed Loop 15 → 24 V 800A 100 mArms 70.3mm -40°C 80mm +70°C 40mm - -
RS Stock No. 301-9502
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HAS 200S
Brand :LEM
THB1,011.61
Each
Units
600:1 20.4 x 10.4mm - Open Loop 15 V 600A - 30mm -10°C 40mm +80°C 30mm - -
RS Stock No. 331-597
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CT132M40/5-1/3
Brand :HOBUT
THB476.04
Each
Units
40:5 21mm DIN Rail Mounted - - 40A 5 A 65mm -30°C 45mm +85°C 30mm - -
RS Stock No. 527-8466
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DHR 100 C420
Brand :LEM
THB7,817.41
Each
Units
100:1 32mm - Open Loop 20 → 50 V dc 100A 4 → 20 mA 70mm -40°C 90mm +70°C 25mm - -
RS Stock No. 881-7972
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2CSG225955R1101 CT MAX 400
Brand :ABB
THB1,342.76
Each
Units
- 30mm - - - - - - -5°C - +50°C - 70 x 111 x 69 mm -
RS Stock No. 106-8535
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.56T200C
THB49.57
Each (In a Tube of 25)
Units
10:1 - - - - 10A - - -40°C - +85°C - 16.79 x 8.89 x 20.19 mm -
RS Stock No. 499-5384
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HX 25-P
Brand :LEM
THB434.97
Each
Units
75:1 1.6mm - Open Loop 15 V 75A - 20mm -25°C 19mm +85°C 15.4mm - -
RS Stock No. 499-5435
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HTB 50-P
Brand :LEM
THB741.03
Each
Units
150:1 16mm - Open Loop 12 → 15 V 150A - 34mm -20°C 39mm +80°C 14mm - -