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 1141 - 1160 รายการจาก 1277 รายการ / Viewing 1141 - 1160 of 1277 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. 173-0219
Brand :RS PRO
THB392.788
Each (In a Box of 18)
Units
1000:1 23.8mm - - - 500A - - -55°C - +130°C - 55.6 x 20.6 x 55.6 mm -
RS Stock No. 171-8813
Brand :RS PRO
THB1,109.73
Each
Units
1200:5 80 x 12mm Clip Fit - - 1200A 5 A 126mm -5°C 104mm +55°C 45mm 104 x 45 x 126 mm -
RS Stock No. 198-4468
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.METSECT5DA100
THB3,533.16
Each
Units
1000:5 - Tropicalise - - 1000A 5 A 94mm -25°C 90mm +60°C 87mm - -
RS Stock No. 122-0480
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.192T9696
Brand :Socomec
THB4,703.15
Each
Units
- 85mm - - - - - - - - - - 184.8 x 172 x 52 mm -
RS Stock No. 173-0218
Brand :RS PRO
THB833.952
Each (In a Box of 25)
Units
1000:1 19.5mm - - - 250A - - -55°C - +130°C - 44.5 x 14.3 x 44.5 mm -
RS Stock No. 919-4707
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LF 2010-S
Brand :LEM
THB9,507.04
Each
Units
3000:1 - - Closed Loop ±14.25 → ±25.2 V 3000A ±0.6 A 135mm -40°C 170mm +85°C 52mm - -
RS Stock No. 331-389
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CT143M300/5-5/1-001
Brand :HOBUT
THB723.79
Each
Units
300:5 24mm DIN Rail Mounted - - 300A 5 A 70mm -30°C 49mm +85°C 45mm - -
RS Stock No. 175-6178
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.4NC5325-0CE21
Brand :Siemens
THB3,207.80
Each
Units
400:1 - Window - - 400A 1 A 84.1mm -30°C 82.5mm +55°C 98mm 82.5 x 98 x 84.1 mm Sentron Power Monitoring Devices
RS Stock No. 497-388
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT 150 B420
Brand :LEM
THB4,655.21
Each
Units
150:1 16mm - - 20 → 30 V dc 150A 4 → 20 mA 67mm -20°C 44.5mm +60°C 36.5mm - -
ใหม่ / New
RS Stock No. 221-0383
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.192Y1106
Brand :Socomec
THB10,289.75
Each
Units
- - - - 230 V ac 1A 20 mA 73mm - 150mm - - - -
RS Stock No. 175-6133
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.4NC5115-0CC21
Brand :Siemens
THB3,146.63
Each
Units
75:1 - Window - - 75A 1 A 65.6mm -30°C 60mm +55°C 75.3mm 60 x 75.3 x 65.6 mm Sentron Power Monitoring Devices
RS Stock No. 173-0044
Brand :RS PRO
THB46.80
Each (In a Box of 351)
Units
300:1 5mm - - - 15A - - -40°C - +120°C - 17.2 x 9.53 x 20.4 mm -
RS Stock No. 313-823
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CT174M800/5-2.5/1-001
Brand :HOBUT
THB752.66
Each
Units
800:5 40mm Base Mounted - - 800A 5 A 95mm -30°C 70mm +85°C 55mm - -
RS Stock No. 175-6208
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.4NC5435-0DH21
Brand :Siemens
THB4,554.79
Each
Units
1500:1 - Window - - 1500A 1 A 84.1mm -30°C 112mm +55°C 127.5mm 112 x 127.5 x 84.1 mm Sentron Power Monitoring Devices
RS Stock No. 175-6164
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.4NC5223-2CE21
Brand :Siemens
THB2,344.56
Each
Units
250:5 - Window - - 250A 5 A 67.6mm -30°C 60.6mm +55°C 78.4mm 60.6 x 78.4 x 67.6 mm Sentron Power Monitoring Devices
RS Stock No. 175-6155
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.4NC5124-2FE21
Brand :Siemens
THB2,591.59
Each
Units
300:5 - Window - - 300A 5 A 65.6mm -30°C 60mm +55°C 75.3mm 60 x 75.3 x 65.6 mm Sentron Power Monitoring Devices
RS Stock No. 171-8802
Brand :RS PRO
THB1,075.80
Each
Units
800:5 41 x 41mm Clip Fit - - 800A 5 A 98mm -5°C 74mm +55°C 45mm 74 x 45 x 98 mm -
RS Stock No. 886-2190
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.XM20-335131S000000
Brand :Sifam Tinsley
THB709.64
Each
Units
600:5 60mm Base Mounted - - - - - - - - - 86 x 45 x 110 mm -
RS Stock No. 198-4473
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.METSECT5DB150
THB5,370.40
Each
Units
1500:5 - Tropicalise - - 1500A 5 A 160mm -25°C 99mm +60°C 78.4mm - -
RS Stock No. 200-3795
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LDSR 0.3-TP/SP1
Brand :LEM
THB1,081.93
Each
Units
300 mA - - Closed Loop 5 V 300mA - - - - - - - -